/* ==========================================================================
   THỪA HOÀ (@hoahaylaca) — STUDIO.DESIGN EXHIBITION PORTFOLIO
   Reference: https://styles.refero.design/style/bb2e29c9-d20a-4b8d-8959-5b506f517ec4
   "Gallery wall in motion: quiet #eeeeee gray exhibition surface, oversized
    -0.04em Inter typography, overlapping vivid creator work, achromatic UI."
   ========================================================================== */

:root {
  /* Colors — Strictly Achromatic Studio.Design Tokens */
  --color-studio-canvas: #eeeeee;
  --color-paper-white: #ffffff;
  --color-charcoal-ink: #222222;
  --color-graphite: #333333;
  --color-soft-ash: #555555;
  --color-absolute-black: #000000;
  --gradient-absolute-black: linear-gradient(180deg, #000000 0%, #eeeeee 100%);

  /* Typography — Font Families */
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-inter-tight: 'Inter Tight', 'Inter', Arial Narrow, ui-sans-serif, system-ui, sans-serif;
  --font-sans-serif: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-arial: 'Arial', sans-serif;

  /* Typography — Scale */
  --text-legal: 11px;
  --leading-legal: 1.66;
  --tracking-legal: -0.11px;

  --text-nav: 15px;
  --leading-nav: 1.4; /* 21px */
  --tracking-nav: 0px;

  --text-body: 16px;
  --leading-body: 1.5;
  --tracking-body: 0px;

  --text-body-strong: 16px;
  --leading-body-strong: 1.4; /* 22.4px */
  --tracking-body-strong: -0.64px;

  --text-feature-nav-heading: 16px;
  --leading-feature-nav-heading: 1.66; /* 26.56px */
  --tracking-feature-nav-heading: 0px;

  --text-feature-nav-link: 16px;
  --leading-feature-nav-link: 1.66; /* 26.56px */
  --tracking-feature-nav-link: 0px;

  --text-section-heading: 48px;
  --leading-section-heading: 1.1; /* 52.8px */
  --tracking-section-heading: -1.92px; /* -0.04em */

  --text-editor-heading: 64px;
  --leading-editor-heading: 1.12;
  --tracking-editor-heading: -2.56px; /* -0.04em */

  --text-hero-display: 80px;
  --leading-hero-display: 1.0; /* 80px */
  --tracking-hero-display: -3.2px; /* -0.04em */

  /* Spacing Scale (Base unit: 4px) */
  --spacing-unit: 4px;
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-28: 28px;
  --spacing-32: 32px;
  --spacing-48: 48px;
  --spacing-56: 56px;
  --spacing-60: 60px;
  --spacing-64: 64px;
  --spacing-100: 100px;
  --spacing-140: 140px;

  /* Layout */
  --section-gap: 60px;
  --card-padding: 24px;
  --element-gap: 16px;

  /* Named Radii — Strictly 4px, 8px, 12px (Zero 9999px pills) */
  --radius-cards: 8px;
  --radius-links: 4px;
  --radius-images: 4px;
  --radius-buttons: 8px;
  --radius-compactbuttons: 4px;
  --radius-utilitysurfaces: 12px;

  /* Shadow — Only for prominent button hover states */
  --shadow-md: rgba(0, 0, 0, 0.1) 0px 2px 15px 0px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  background-color: var(--color-studio-canvas);
  color: var(--color-charcoal-ink);
  font-family: var(--font-inter);
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100vw;
  position: relative;
}

/* Top Minimal Progress Hairline (Achromatic Charcoal #222222) */
.scroll-laser-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--color-charcoal-ink);
  z-index: 9999;
  transition: width 0.08s linear;
}

/* Custom Dual-Spring Gallery Cursor (Monochrome Studio.Design) */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  opacity: 0;
}

.cursor-dot.active,
.cursor-ring.active {
  opacity: 1;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--color-charcoal-ink);
}

.cursor-ring {
  width: 34px;
  height: 34px;
  border-radius: 4px;
  border: 1px solid rgba(34, 34, 34, 0.45);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-inter-tight);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-paper-white);
  transition: width 0.24s cubic-bezier(0.16, 1, 0.3, 1),
              height 0.24s cubic-bezier(0.16, 1, 0.3, 1),
              background 0.2s ease,
              border-color 0.2s ease;
}

.cursor-ring.hover-video {
  width: 72px;
  height: 32px;
  border-radius: 4px;
  background: var(--color-charcoal-ink);
  border-color: var(--color-charcoal-ink);
}

.cursor-ring.hover-map {
  width: 68px;
  height: 28px;
  border-radius: 4px;
  background: var(--color-paper-white);
  color: var(--color-charcoal-ink);
  border-color: var(--color-charcoal-ink);
}

@media (hover: none), (max-width: 900px) {
  .cursor-dot,
  .cursor-ring {
    display: none !important;
  }
}

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-32);
}

/* ==========================================================================
   COMPONENTS: STUDIO WORDMARK, PUBLIC NAV & BUTTONS
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(238, 238, 238, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding-top: var(--spacing-20);
  padding-bottom: var(--spacing-16);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
}

/* Studio Wordmark: compact monochrome wordmark at left */
.studio-wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  text-decoration: none;
  color: var(--color-charcoal-ink);
  white-space: nowrap;
  flex-shrink: 0;
}

.flag-logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 18px;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(34, 34, 34, 0.18), 0 1px 3px rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
  background: #da251d;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.studio-wordmark:hover .flag-logo-badge {
  transform: scale(1.08);
  box-shadow: 0 0 0 1px rgba(34, 34, 34, 0.28), 0 2px 6px rgba(0, 0, 0, 0.14);
}

.flag-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.flag-logo-badge.small {
  width: 20px;
  height: 14px;
  border-radius: 2px;
}

.wordmark-square {
  width: 22px;
  height: 22px;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-inter);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.04em;
  flex-shrink: 0;
}

.wordmark-title {
  font-family: var(--font-inter);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-charcoal-ink);
  white-space: nowrap;
}

.wordmark-sub {
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-soft-ash);
  white-space: nowrap;
}

@media (max-width: 992px) {
  .wordmark-sub {
    display: none;
  }
}

/* Public Navigation Cluster */
.nav-cluster {
  display: flex;
  align-items: center;
  gap: var(--spacing-28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-inter-tight);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  color: var(--color-charcoal-ink);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-links); /* 4px */
  transition: all 0.18s ease;
  white-space: nowrap;
}

.nav-links a:hover {
  background: rgba(34, 34, 34, 0.06);
  color: #000000;
}

.nav-links a.active {
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-20);
}

/* Language Switcher (Studio.Design VI / EN) */
.lang-switch-wrap {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: rgba(34, 34, 34, 0.05);
  border: 1px solid rgba(34, 34, 34, 0.12);
  border-radius: 999px;
  padding: 3px 8px;
  font-family: var(--font-inter-tight);
  font-size: 12px;
  font-weight: 600;
}

.lang-btn {
  background: none;
  border: none;
  padding: 1px 4px;
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--color-soft-ash);
  cursor: pointer;
  border-radius: 3px;
  transition: color 0.15s ease, background 0.15s ease;
  line-height: 1;
}

.lang-btn:hover {
  color: var(--color-charcoal-ink);
}

.lang-btn.active {
  color: var(--color-charcoal-ink);
  font-weight: 700;
}

.lang-sep {
  color: rgba(34, 34, 34, 0.28);
  font-size: 11px;
  user-select: none;
}

/* Bare Text Control */
.bare-text-control {
  background: transparent;
  color: var(--color-soft-ash);
  border: none;
  border-radius: 0px;
  padding: 4px 0;
  font-family: var(--font-inter-tight);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: color 0.18s ease;
}

.bare-text-control strong {
  color: var(--color-charcoal-ink);
}

.bare-text-control:hover {
  color: var(--color-charcoal-ink);
}

.bare-text-control.active-filter {
  color: var(--color-charcoal-ink);
  font-weight: 700;
  border-bottom: 2px solid var(--color-charcoal-ink);
}

/* Filled Button: 8px radius, compact padding */
.btn-filled-charcoal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  font-family: var(--font-inter);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 20px;
  border-radius: var(--radius-buttons); /* 8px */
  padding: 8px 18px;
  border: 1px solid var(--color-charcoal-ink);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-filled-charcoal:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Compact Dark Arrow Button: #222222 fill, 4px radius, 12px top/bottom, 24px left, 20px right */
.btn-compact-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.2;
  border-radius: var(--radius-compactbuttons); /* 4px */
  padding: 12px 20px 12px 24px;
  border: none;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-compact-arrow:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* White Inverse Button: #ffffff fill, #333333 text, 1px #222222 border, 8px radius, 12px 24px padding */
.btn-white-inverse {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  background: var(--color-paper-white);
  color: var(--color-graphite);
  border: 1px solid var(--color-charcoal-ink);
  border-radius: var(--radius-buttons); /* 8px */
  padding: 12px 24px;
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.64px;
  line-height: 22.4px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-white-inverse:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ==========================================================================
   ASYMMETRIC EXHIBITION HERO ON STUDIO CANVAS (#EEEEEE)
   ========================================================================== */
.hero-exhibition {
  padding: var(--spacing-32) 0 var(--spacing-64);
  background: var(--color-studio-canvas);
  position: relative;
}

.hero-asymmetric-stage {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-16);
  align-items: start;
  position: relative;
}

/* Left-aligned Hero Statement with Studio.Design typography */
.hero-statement-block {
  grid-column: 1 / 13;
  z-index: 4;
  padding-top: var(--spacing-12);
}

.hero-kicker-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-20);
  font-family: var(--font-inter-tight);
  font-size: 15px;
  font-weight: 500;
  line-height: 21px;
  color: var(--color-soft-ash);
}

.hero-display-headline {
  font-family: var(--font-inter);
  font-size: clamp(38px, 4.4vw, 64px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.04em; /* -3.2px at 80px */
  color: var(--color-charcoal-ink);
  margin-bottom: var(--spacing-16);
}

/* ==========================================================================
   HERO FLOWING STREAM OF MASTERWORKS ("Dòng chảy điện ảnh không trung")
   Studio.Design Canvas with continuous hardware-accelerated fluid motion
   ========================================================================== */
.hero-flow-stream-wrap {
  grid-column: 1 / 13;
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 8px 0 16px;
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-16);
  /* Soft edge fade masks for smooth entry/exit stream effect */
  mask-image: linear-gradient(to right, transparent 0%, black 48px, black calc(100% - 48px), transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 48px, black calc(100% - 48px), transparent 100%);
  z-index: 2;
}

.hero-flow-stream-track {
  display: flex;
  width: max-content;
  will-change: transform;
  animation: flowStream 36s linear infinite;
}

/* Pause motion smoothly when hovering or holding for inspection */
.hero-flow-stream-wrap:hover .hero-flow-stream-track,
.hero-flow-stream-wrap:focus-within .hero-flow-stream-track {
  animation-play-state: paused;
}

@keyframes flowStream {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-50%, 0, 0);
  }
}

/* Masterwork Exhibition Flow Card */
.flow-card {
  width: 290px;
  flex-shrink: 0;
  margin-right: 20px;
  background: var(--color-paper-white);
  border-radius: var(--radius-cards); /* 8px */
  border: 1px solid rgba(34, 34, 34, 0.08);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.25s ease;
}

.flow-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
  border-color: rgba(34, 34, 34, 0.22);
}

.flow-card-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--color-absolute-black);
  overflow: hidden;
}

.flow-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.flow-card:hover .flow-card-media img {
  transform: scale(1.08);
}

.flow-spec-chip {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.74);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-paper-white);
  font-family: var(--font-inter-tight);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  pointer-events: none;
  z-index: 2;
}

.flow-play-pill {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--color-charcoal-ink);
  font-family: var(--font-inter);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  pointer-events: none;
  z-index: 2;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.flow-card:hover .flow-play-pill {
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  transform: scale(1.04);
}

.flow-card-info {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: var(--color-paper-white);
}

.flow-card-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.flow-card-num {
  font-family: var(--font-inter);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: rgba(34, 34, 34, 0.4);
  flex-shrink: 0;
}

.flow-card-title {
  font-family: var(--font-inter);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--color-charcoal-ink);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.flow-card-loc {
  font-family: var(--font-inter-tight);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-soft-ash);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.flow-card-desc {
  font-family: var(--font-inter);
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-graphite);
  margin: 4px 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Lower-Left Stats & Lower-Right Compact Descriptive Copy + CTA */
.hero-bottom-bar {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-24);
  align-items: end;
  margin-top: var(--spacing-24);
  padding-top: var(--spacing-24);
  border-top: 1px solid rgba(34, 34, 34, 0.14);
}

.hero-metrics-cluster {
  grid-column: 1 / 8;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-16);
}

.metric-cell {
  padding-right: var(--spacing-12);
  border-right: 1px solid rgba(34, 34, 34, 0.12);
}

.metric-cell:last-child {
  border-right: none;
}

.metric-num {
  font-family: var(--font-inter);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--color-charcoal-ink);
}

.metric-caption {
  font-family: var(--font-inter-tight);
  font-size: 15px;
  font-weight: 500;
  line-height: 21px;
  color: var(--color-soft-ash);
  margin-top: var(--spacing-4);
}

.hero-desc-cluster {
  grid-column: 8 / 13;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
}

.hero-desc-copy {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-graphite);
}

.hero-desc-copy strong {
  font-weight: 700;
  letter-spacing: -0.64px;
  color: var(--color-charcoal-ink);
}

.hero-cta-cluster {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-16);
}

.hero-main-btns {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.hero-social-links-wrap {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

/* ==========================================================================
   KINETIC EXHIBITION TICKER ON CHARCOAL SURFACE (#222222)
   ========================================================================== */
.kinetic-ticker {
  overflow: hidden;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  padding: var(--spacing-12) 0;
}

.kinetic-ticker-track {
  display: flex;
  width: max-content;
  gap: var(--spacing-32);
  animation: tickerScroll 34s linear infinite;
  font-family: var(--font-inter-tight);
  font-size: 15px;
  font-weight: 500;
  line-height: 21px;
}

.kinetic-ticker:hover .kinetic-ticker-track {
  animation-play-state: paused;
}

.kinetic-ticker-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-12);
  white-space: nowrap;
  color: #f7f7f7;
}

.kinetic-ticker-item strong {
  color: var(--color-paper-white);
  font-weight: 700;
}

@keyframes tickerScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ==========================================================================
   EXHIBITION SECTIONS ON STUDIO CANVAS (#EEEEEE)
   ========================================================================== */
.section-exhibition {
  padding: var(--spacing-100) 0 var(--spacing-60);
  background: var(--color-studio-canvas);
}

.section-header-row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-24);
  align-items: end;
  margin-bottom: var(--spacing-48);
}

.section-header-left {
  grid-column: 1 / 8;
}

.section-index-label {
  font-family: var(--font-inter-tight);
  font-size: 15px;
  font-weight: 500;
  line-height: 21px;
  color: var(--color-soft-ash);
  margin-bottom: var(--spacing-8);
  display: block;
}

/* Section Heading: Inter 48px/700, 52.8px line-height, -1.92px tracking */
.section-heading {
  font-family: var(--font-inter);
  font-size: clamp(34px, 3.8vw, 48px);
  font-weight: 700;
  line-height: 1.1; /* 52.8px at 48px */
  letter-spacing: -0.04em; /* -1.92px at 48px */
  color: var(--color-charcoal-ink);
}

.section-header-right {
  grid-column: 8 / 13;
  font-family: var(--font-inter);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-graphite);
}

/* Filter Toolbar: Bare Text Controls + Compact Search Input (4px radius) */
.exhibition-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-24);
  margin-bottom: var(--spacing-32);
  padding-bottom: var(--spacing-16);
  border-bottom: 1px solid rgba(34, 34, 34, 0.14);
  flex-wrap: wrap;
}

.filter-links-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-24);
}

.compact-search {
  position: relative;
  min-width: 280px;
}

.compact-search input {
  width: 100%;
  background: var(--color-paper-white);
  border: 1px solid var(--color-charcoal-ink);
  border-radius: var(--radius-compactbuttons); /* 4px */
  padding: 10px 14px 10px 36px;
  font-family: var(--font-inter-tight);
  font-size: 15px;
  color: var(--color-charcoal-ink);
  outline: none;
}

.compact-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  color: var(--color-soft-ash);
}

/* Exhibition Gallery Grid: Irregular & Edge-to-Edge Black Showcase Cards */
.cinema-exhibition-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-24);
}

/* Span patterns for asymmetric gallery rhythm */
.exhibition-work-item {
  grid-column: span 6;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.exhibition-work-item.featured-wide {
  grid-column: span 8;
}

.exhibition-work-item.featured-narrow {
  grid-column: span 4;
}

/* Black Showcase Card: #000000 bg, 8px radius, NO shadow, 0px internal padding */
.black-showcase-card {
  position: relative;
  background: var(--color-absolute-black);
  border-radius: var(--radius-cards); /* 8px */
  padding: 0;
  box-shadow: none;
  overflow: hidden;
  aspect-ratio: 16 / 9.5;
  cursor: pointer;
}

.black-showcase-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.black-showcase-card:hover img {
  transform: scale(1.045);
  opacity: 0.9;
}

.showcase-edge-badges {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.mono-spec-chip {
  background: rgba(0, 0, 0, 0.82);
  color: var(--color-paper-white);
  font-family: var(--font-inter-tight);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 4px;
}

.save-square-btn {
  pointer-events: auto;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.82);
  color: var(--color-paper-white);
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s ease, color 0.2s ease;
}

.save-square-btn.saved,
.save-square-btn:hover {
  background: var(--color-paper-white);
  color: var(--color-absolute-black);
}

.showcase-bottom-trigger {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 4px;
}

.work-caption-block {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-16);
  padding-top: var(--spacing-4);
}

.work-title-strong {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.64px;
  color: var(--color-charcoal-ink);
  cursor: pointer;
}

.work-title-strong:hover {
  text-decoration: underline;
}

.work-sub-desc {
  font-family: var(--font-inter);
  font-size: 14px;
  line-height: 1.45;
  color: var(--color-soft-ash);
  margin-top: 2px;
}

.work-coord-meta {
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-graphite);
  white-space: nowrap;
}

/* ==========================================================================
   SECTION 02: 9:16 VERTICAL EXHIBITION WALL (TIKTOK @HOAHAYLACA)
   ========================================================================== */
.vertical-exhibition-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: var(--spacing-32);
  align-items: start;
}

/* Black Showcase Vertical Player (8px radius, #000000 surface, 0px internal padding) */
.vertical-stage-frame {
  position: sticky;
  top: 88px;
  background: var(--color-absolute-black);
  border-radius: var(--radius-cards); /* 8px */
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--color-charcoal-ink);
}

.vertical-stage-header {
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
}

.vertical-stage-screen {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  background: var(--color-absolute-black);
}

.vertical-stage-screen iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.vertical-stage-footer {
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.reels-mosaic-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-16);
}

/* Alternating vertical offset for Studio.Design irregular gallery feel */
.reel-mosaic-tile {
  position: relative;
  aspect-ratio: 9 / 16;
  background: var(--color-absolute-black);
  border-radius: var(--radius-images); /* 4px */
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.reel-mosaic-tile:nth-child(even) {
  margin-top: var(--spacing-24);
  border-radius: var(--radius-cards); /* 8px */
}

.reel-mosaic-tile.active {
  outline: 3px solid var(--color-charcoal-ink);
  outline-offset: 2px;
}

.reel-mosaic-tile:hover {
  transform: translateY(-6px);
}

.reel-mosaic-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}

.reel-mosaic-tile:hover img {
  transform: scale(1.05);
}

.reel-tile-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, transparent 45%, rgba(0,0,0,0.88) 100%);
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-paper-white);
}

.reel-tile-views {
  align-self: flex-start;
  background: rgba(0, 0, 0, 0.78);
  color: var(--color-paper-white);
  font-family: var(--font-inter-tight);
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
}

.reel-tile-title {
  font-family: var(--font-inter);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
}

.reel-tile-tag {
  font-family: var(--font-inter-tight);
  font-size: 12px;
  color: #dddddd;
}

/* ==========================================================================
   SECTION 03: ABSOLUTE BLACK TO CANVAS BAND — 63-PROVINCE VIETNAM MAP
   Uses --gradient-absolute-black: linear-gradient(180deg, #000000 0%, #eeeeee 100%)
   ========================================================================== */
.section-black-band {
  background: var(--color-absolute-black);
  color: var(--color-paper-white);
  padding: var(--spacing-100) 0 var(--spacing-64);
  position: relative;
}

.black-to-canvas-bridge {
  height: 100px;
  background: var(--gradient-absolute-black);
}

.section-black-band .section-index-label {
  color: #aaaaaa;
}

.section-black-band .section-heading {
  color: var(--color-paper-white);
}

.section-black-band .section-header-right {
  color: #cccccc;
}

.flight-map-grid {
  display: grid;
  grid-template-columns: 1.08fr 1.12fr;
  gap: var(--spacing-24);
  align-items: stretch;
}

.radar-map-panel {
  background: #111111;
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-cards); /* 8px */
  padding: var(--spacing-24);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 680px;
}

.radar-sweep {
  position: absolute;
  width: 500px;
  height: 500px;
  top: 50%;
  left: 48%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  pointer-events: none;
}

.radar-sweep::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(255, 255, 255, 0.09) 0deg, transparent 60deg, transparent 360deg);
  animation: radarSpin 8s linear infinite;
}

@keyframes radarSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.vn-svg-wrap {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.vn-map-svg {
  width: 100%;
  max-width: 470px;
  height: 600px;
  overflow: visible;
}

/* Map Mode Toggle Group (63 vs 34) */
.map-mode-toggle-group {
  display: inline-flex;
  align-items: center;
  background: var(--color-charcoal-ink);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-buttons); /* 8px */
  padding: 3px;
  gap: 3px;
}

.map-mode-btn {
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  background: transparent;
  color: #aaaaaa;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.map-mode-btn.active {
  background: var(--color-paper-white);
  color: var(--color-charcoal-ink);
  font-weight: 700;
}

.mode-label-full {
  display: inline;
}

.mode-label-short {
  display: none;
}

.map-mode-btn:hover:not(.active) {
  color: #ffffff;
}

.map-portal-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
  color: #aaaaaa;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid #444444;
  background: rgba(34, 34, 34, 0.6);
  transition: all 0.18s ease;
}

.map-portal-link:hover {
  color: var(--color-paper-white);
  border-color: #777777;
  background: var(--color-charcoal-ink);
}

/* Monochrome Architectural 63-Province Paths */
.vn-prov {
  fill: #1d1d1d;
  stroke: #444444;
  stroke-width: 0.65;
  transition: fill 0.25s ease, stroke 0.25s ease;
}

.vn-prov.filmed {
  fill: #333333;
  stroke: #888888;
  stroke-width: 0.9;
  cursor: pointer;
}

.vn-prov.filmed:hover,
.vn-prov.active-prov {
  fill: var(--color-paper-white);
  stroke: var(--color-paper-white);
  stroke-width: 1.2;
}

/* 34 Province Cluster Highlight Mode */
.vn-prov.group-34-hover {
  fill: #555555 !important;
  stroke: #ffffff !important;
  stroke-width: 1.2 !important;
}

.vn-map-svg.mode-34 .vn-prov {
  stroke: #666666;
  stroke-width: 0.8;
}

.flight-route-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.22);
  stroke-width: 1.4;
}

.flight-route-animated {
  fill: none;
  stroke: var(--color-paper-white);
  stroke-width: 2;
  stroke-dasharray: 6 6;
  animation: dashFlow 18s linear infinite;
}

.active-flight-arc {
  fill: none;
  stroke: var(--color-paper-white);
  stroke-width: 2.2;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  animation: drawArc 1.05s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes dashFlow {
  to { stroke-dashoffset: -260; }
}

@keyframes drawArc {
  to { stroke-dashoffset: 0; }
}

.map-hotspot {
  cursor: pointer;
}

.map-hotspot circle.outer-pulse {
  fill: rgba(255, 255, 255, 0.2);
  animation: pulseMono 1.8s infinite ease-in-out;
}

@keyframes pulseMono {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.85); }
}

.map-hotspot circle.core-dot {
  fill: var(--color-paper-white);
  transition: r 0.2s ease;
}

.map-hotspot.active circle.core-dot {
  fill: var(--color-paper-white);
  r: 7;
  stroke: var(--color-absolute-black);
  stroke-width: 2;
}

.map-hotspot text {
  paint-order: stroke;
  stroke: #000000;
  stroke-width: 3.5px;
  stroke-linecap: round;
  stroke-linejoin: round;
  font-family: var(--font-inter-tight);
  font-weight: 700;
  fill: #dddddd;
}

.map-hotspot.active text,
.map-hotspot:hover text {
  fill: var(--color-paper-white);
}

#liveDroneMarker {
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}

.drone-rotor {
  transform-box: fill-box;
  transform-origin: center;
  animation: spinRotor 0.25s linear infinite;
}

@keyframes spinRotor {
  to { transform: rotate(360deg); }
}

/* Right Map Inspection Panel (#222222 Charcoal Surface, 8px radius, 24px padding) */
.map-detail-panel {
  background: var(--color-charcoal-ink);
  border-radius: var(--radius-cards); /* 8px */
  padding: var(--card-padding); /* 24px */
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--spacing-20);
}

.location-buttons-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-8);
}

/* Compact 4px Radius Location Controls */
.loc-chip {
  font-family: var(--font-inter-tight);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-compactbuttons); /* 4px */
  border: 1px solid var(--color-soft-ash);
  background: var(--color-graphite);
  color: #f7f7f7;
  cursor: pointer;
  transition: all 0.18s ease;
}

.loc-chip.active,
.loc-chip:hover {
  background: var(--color-paper-white);
  color: var(--color-charcoal-ink);
  border-color: var(--color-paper-white);
  font-weight: 700;
}

.active-location-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
}

.active-location-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-images); /* 4px */
  object-fit: cover;
  display: block;
}

.flight-telemetry-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-12);
  padding: var(--spacing-12);
  border-radius: var(--radius-compactbuttons); /* 4px */
  background: var(--color-graphite);
  font-family: var(--font-inter-tight);
  font-size: 13px;
}

.flight-telemetry-strip div span {
  display: block;
  color: #bbbbbb;
  font-size: 11px;
}

.flight-telemetry-strip div strong {
  color: var(--color-paper-white);
}

/* ==========================================================================
   SECTION 04: DARK FEATURE NAVIGATION PANEL (#222222) & BOOKING STUDIO
   ========================================================================== */
.dark-feature-nav-panel {
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  border-radius: var(--radius-cards); /* 8px */
  padding: var(--spacing-48);
  margin-top: var(--spacing-24);
}

.collab-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: var(--spacing-40);
  align-items: stretch;
}

/* Monochrome Exhibition Creator Card (8px radius, 3D tilt) */
.holo-card-wrapper {
  perspective: 1100px;
  height: 100%;
}

.holo-profile-card {
  --rx: 0deg;
  --ry: 0deg;
  position: relative;
  border-radius: var(--radius-cards); /* 8px */
  padding: 20px;
  background: var(--color-absolute-black);
  border: 1px solid var(--color-graphite);
  transform: rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform 0.14s ease-out;
  color: var(--color-paper-white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.holo-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-inter-tight);
  font-size: 11.5px;
  color: #aaaaaa;
  margin-bottom: var(--spacing-12);
}

.holo-avatar-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 175px;
  border-radius: var(--radius-images); /* 4px */
  overflow: hidden;
  margin-bottom: var(--spacing-12);
}

.holo-avatar-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

.holo-status-pill {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  padding: 4px 10px;
  border-radius: 4px;
  font-family: var(--font-inter-tight);
  font-size: 11.5px;
  font-weight: 500;
}

.holo-name {
  font-family: var(--font-inter);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.holo-role {
  font-family: var(--font-inter-tight);
  font-size: 14px;
  color: #cccccc;
  margin-bottom: var(--spacing-12);
}

.creator-credentials-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.credential-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 10px;
  background: var(--color-charcoal-ink);
  border-radius: 4px;
  border-left: 2px solid var(--color-paper-white);
}

.credential-badge {
  font-family: var(--font-inter-tight);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #aaaaaa;
}

.credential-text strong {
  display: block;
  font-family: var(--font-inter);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-paper-white);
}

.credential-text span {
  display: block;
  font-family: var(--font-inter-tight);
  font-size: 11.5px;
  line-height: 1.35;
  color: #bbbbbb;
}

/* Community Groups in Holo Card */
.community-groups-pills {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 6px;
}

.comm-group-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 4px;
  color: #eeeeee;
  text-decoration: none;
  font-family: var(--font-inter);
  font-size: 11.5px;
  font-weight: 500;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.comm-group-chip:hover {
  background: var(--color-paper-white);
  color: var(--color-charcoal-ink);
  border-color: var(--color-paper-white);
  transform: translateX(3px);
}

.comm-group-chip-left {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comm-group-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px rgba(34, 197, 94, 0.6);
  flex-shrink: 0;
}

.comm-group-arrow {
  font-size: 10px;
  opacity: 0.7;
}

.comm-group-chip:hover .comm-group-arrow {
  opacity: 1;
}

.holo-quote {
  font-family: var(--font-inter);
  font-size: 11.5px;
  line-height: 1.45;
  color: #cccccc;
  padding: 8px 10px;
  background: var(--color-charcoal-ink);
  border-radius: 4px;
  margin-bottom: 10px;
}

.holo-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.holo-link-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 10px;
  border-radius: var(--radius-compactbuttons); /* 4px */
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  text-decoration: none;
  font-family: var(--font-inter-tight);
  font-size: 13px;
  font-weight: 500;
  transition: background 0.18s ease, color 0.18s ease;
}

.holo-link-btn:hover {
  background: var(--color-paper-white);
  color: var(--color-charcoal-ink);
}

/* Booking & Dark Feature Navigation Specification */
.service-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-16);
  margin: var(--spacing-20) 0 var(--spacing-24);
}

.service-option-card {
  background: var(--color-graphite);
  border: 1px solid #444444;
  border-radius: var(--radius-cards); /* 8px */
  padding: var(--spacing-20);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.service-option-card.selected {
  background: var(--color-absolute-black);
  border-color: var(--color-paper-white);
}

/* Dark Feature Navigation Panel Typography: Paper White 16px/700 (26.56px) + #f7f7f7 16px/400 */
.service-option-card h4 {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 700;
  line-height: 26.56px;
  color: var(--color-paper-white);
  margin-bottom: 4px;
}

.service-option-card p {
  font-family: var(--font-inter);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  color: #f7f7f7;
}

.estimator-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-24);
}

.field-group label {
  display: block;
  font-family: var(--font-inter-tight);
  font-size: 14px;
  font-weight: 500;
  color: #cccccc;
  margin-bottom: 6px;
}

.field-group select,
.field-group input {
  width: 100%;
  background: var(--color-graphite);
  border: 1px solid #555555;
  color: var(--color-paper-white);
  padding: 12px 14px;
  border-radius: var(--radius-compactbuttons); /* 4px */
  font-family: var(--font-inter);
  font-size: 15px;
  outline: none;
}

.field-group select:focus,
.field-group input:focus {
  border-color: var(--color-paper-white);
}

.estimate-summary-bar {
  background: var(--color-absolute-black);
  border-radius: var(--radius-cards); /* 8px */
  padding: var(--spacing-24);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.estimate-price {
  font-family: var(--font-inter);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--color-paper-white);
}

/* ==========================================================================
   CREDIBILITY PILLARS & TECHNICAL STANDARDS (Studio Black Aesthetics)
   ========================================================================== */
.credibility-pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-16);
  margin-top: var(--spacing-32);
}

.credibility-pillar-card {
  background: var(--color-charcoal-ink);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-cards);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.credibility-pillar-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.28);
  background: #282828;
}

.pillar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-12);
}

.pillar-tag {
  font-family: var(--font-inter-tight);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-paper-white);
  background: rgba(255, 255, 255, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
}

.pillar-icon {
  font-size: 18px;
}

.pillar-title {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-paper-white);
  margin-bottom: var(--spacing-8);
}

.pillar-desc {
  font-family: var(--font-inter);
  font-size: 13.5px;
  font-weight: 400;
  line-height: 1.5;
  color: #cccccc;
  margin-bottom: auto;
}

.pillar-desc strong {
  color: var(--color-paper-white);
  font-weight: 600;
}

.pillar-foot {
  font-family: var(--font-inter-tight);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #aaaaaa;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 10px;
  margin-top: 14px;
}

/* ==========================================================================
   FOOTER LINK CLUSTER ON STUDIO CANVAS (#EEEEEE)
   ========================================================================== */
.site-footer {
  background: var(--color-studio-canvas);
  color: var(--color-charcoal-ink);
  padding: var(--spacing-64) 0 var(--spacing-48);
  border-top: 1px solid rgba(34, 34, 34, 0.14);
}

.footer-clusters-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-48);
}

.footer-cluster-col {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4); /* 4px internal micro-gaps */
}

.footer-cluster-title {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.64px;
  line-height: 1.4;
  color: var(--color-charcoal-ink);
  margin-bottom: var(--spacing-8);
}

.footer-cluster-col a {
  font-family: var(--font-inter-tight);
  font-size: 15px;
  font-weight: 500;
  line-height: 21px;
  color: var(--color-charcoal-ink);
  text-decoration: none;
}

.footer-cluster-col a:hover {
  text-decoration: underline;
}

.footer-bottom-legal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  padding-top: var(--spacing-24);
  border-top: 1px solid rgba(34, 34, 34, 0.12);
  font-family: var(--font-inter);
  font-size: var(--text-legal); /* 11px */
  line-height: var(--leading-legal); /* 1.66 */
  letter-spacing: var(--tracking-legal); /* -0.11px */
  color: var(--color-soft-ash);
}

/* ==========================================================================
   MODALS & SAVED DRAWER (STUDIO.DESIGN MONOCHROME)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-24);
}

.modal-backdrop.open {
  display: flex;
}

.video-modal-box {
  width: 100%;
  max-width: 980px;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  border-radius: var(--radius-cards); /* 8px */
  overflow: hidden;
}

.video-modal-header {
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-absolute-black);
}

.video-embed-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-absolute-black);
}

.video-embed-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-modal-footer {
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.saved-drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 100%;
  max-width: 390px;
  height: 100vh;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  z-index: 110;
  padding: var(--spacing-24);
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.saved-drawer.open {
  right: 0;
}

.saved-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.saved-item-row {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--color-graphite);
  padding: 10px;
  border-radius: 4px;
}

.saved-item-row img {
  width: 76px;
  height: 46px;
  object-fit: cover;
  border-radius: 4px;
}

/* Scroll Reveal Motion */
.reveal-up {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--delay, 0ms);
}

@media (prefers-reduced-motion: no-preference) and (min-width: 901px) {
  .js-ready .reveal-up:not(.in-view) {
    opacity: 0;
    transform: translateY(28px);
  }
}

.reveal-up.in-view {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* Responsive Enhancements */
@media (max-width: 1080px) {
  .hero-asymmetric-stage {
    display: flex;
    flex-direction: column;
    width: 100%;
  }
  .hero-bottom-bar {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-20);
  }
  .section-header-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--spacing-12);
  }
  .cinema-exhibition-grid {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-28);
  }
  .hero-statement-block,
  .hero-flow-stream-wrap,
  .hero-metrics-cluster,
  .hero-desc-cluster,
  .section-header-left,
  .section-header-right,
  .exhibition-work-item,
  .exhibition-work-item.featured-wide,
  .exhibition-work-item.featured-narrow {
    grid-column: 1 / -1;
    width: 100%;
    max-width: 100%;
  }
  .hero-flow-stream-wrap {
    margin-top: 14px;
    margin-bottom: var(--spacing-20);
    padding: 8px 0 14px;
    mask-image: linear-gradient(to right, transparent 0%, black 28px, black calc(100% - 28px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 28px, black calc(100% - 28px), transparent 100%);
  }
  .flow-card {
    width: 260px;
    margin-right: 16px;
  }
  .vertical-exhibition-layout,
  .flight-map-grid,
  .collab-grid {
    grid-template-columns: 1fr;
  }
  .credibility-pillars-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-16);
  }
  .reels-mosaic-wall {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-clusters-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .vertical-stage-frame {
    position: relative;
    top: 0;
    max-width: 380px;
    margin: 0 auto;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  /* Layout & Containers */
  .site-header {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
  }
  .site-header-inner {
    padding-right: 4px;
  }
  .container {
    padding: 0 var(--spacing-16);
  }
  .nav-actions {
    gap: 8px;
  }
  .lang-switch-wrap {
    padding: 2px 6px;
    font-size: 11px;
  }
  .lang-btn {
    font-size: 10.5px;
    padding: 1px 2px;
  }
  .btn-filled-charcoal {
    padding: 8px 16px;
    font-size: 13px;
  }
  .bare-text-control {
    font-size: 13px;
  }

  /* Section Spacing */
  .section-exhibition {
    padding: var(--spacing-48) 0;
  }
  .section-black-band {
    padding: var(--spacing-64) 0 var(--spacing-48);
  }
  .section-header-grid {
    margin-bottom: var(--spacing-28);
    gap: var(--spacing-12);
  }

  /* Mobile Display Typography — Balanced & Bound */
  .hero-kicker-row {
    font-size: 11px;
    line-height: 15px;
    gap: 6px;
    margin-bottom: var(--spacing-12);
    flex-wrap: wrap;
    color: var(--color-soft-ash);
  }

  .hero-display-headline {
    font-size: clamp(26px, 7vw, 36px);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-16);
    word-break: normal;
    overflow-wrap: break-word;
  }

  .section-heading {
    font-size: clamp(22px, 6vw, 30px);
    line-height: 1.18;
    letter-spacing: -0.03em;
    word-break: normal;
    overflow-wrap: break-word;
  }

  /* Hero Flowing Stream ("Dòng chảy motion") on Mobile */
  .hero-statement-block {
    margin-bottom: var(--spacing-12);
  }

  .hero-flow-stream-wrap {
    grid-column: 1 / -1;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    padding: 6px 0 12px;
    margin-top: 10px;
    margin-bottom: var(--spacing-20);
    mask-image: linear-gradient(to right, transparent 0%, black 20px, black calc(100% - 20px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 20px, black calc(100% - 20px), transparent 100%);
  }

  .hero-flow-stream-track {
    animation-duration: 30s;
  }

  .flow-card {
    width: 228px;
    margin-right: 14px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.07);
  }

  .flow-card-info {
    padding: 10px 12px 12px;
    gap: 2px;
  }

  .flow-card-title {
    font-size: 13.5px;
  }

  .flow-card-loc {
    font-size: 11px;
  }

  .flow-card-desc {
    font-size: 11.5px;
  }

  .flow-spec-chip {
    font-size: 9.5px;
    padding: 3px 6px;
    top: 8px;
    left: 8px;
  }

  .flow-play-pill {
    font-size: 10px;
    padding: 3px 8px;
    bottom: 8px;
    right: 8px;
  }

  /* Compact 2x2 Stats Dashboard on Mobile */
  .hero-metrics-cluster {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-12);
    padding: var(--spacing-16) 0;
  }
  .metric-cell {
    padding: var(--spacing-12);
    background: rgba(0, 0, 0, 0.03);
    border-radius: var(--radius-compactbuttons);
    border: none;
  }
  .metric-num {
    font-size: clamp(24px, 6.5vw, 32px);
  }
  .metric-caption {
    font-size: 13px;
    line-height: 1.35;
  }

  .hero-desc-copy {
    font-size: 15px;
    line-height: 1.5;
  }

  /* Full-width Thumb-friendly CTA Buttons */
  .hero-cta-cluster {
    width: 100%;
    gap: var(--spacing-16);
  }
  .hero-main-btns {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-12);
  }
  .hero-main-btns .btn-filled-charcoal,
  .hero-main-btns .btn-compact-arrow {
    width: 100%;
    text-align: center;
    justify-content: center;
    padding: 12px 20px;
    font-size: 14px;
    box-sizing: border-box;
  }
  .hero-social-links-wrap {
    width: 100%;
    justify-content: flex-start;
    gap: var(--spacing-16);
  }

  /* 16:9 Cinema Exhibition Toolbar & Cards */
  .exhibition-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-16);
    margin-bottom: var(--spacing-24);
  }
  .filter-links-group {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 6px;
    width: 100%;
    gap: var(--spacing-16);
  }
  .filter-links-group::-webkit-scrollbar {
    display: none;
  }
  .filter-links-group .bare-text-control {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 14px;
  }
  .compact-search {
    width: 100%;
    min-width: 0;
  }

  /* Masterwork Card Caption */
  .work-caption-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .work-coord-meta {
    order: -1;
    font-size: 12px;
    color: var(--color-soft-ash);
    white-space: normal;
  }
  .work-title-strong {
    font-size: 15px;
    line-height: 1.35;
  }
  .work-sub-desc {
    font-size: 13px;
    line-height: 1.4;
  }

  /* Vertical Reels Studio */
  .vertical-stage-frame {
    max-width: 100%;
    width: 100%;
    border-radius: 16px;
  }
  .reels-mosaic-wall {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: 100%;
    box-sizing: border-box;
  }
  .reel-mosaic-tile {
    width: 100%;
    box-sizing: border-box;
  }
  .reel-mosaic-tile:nth-child(even) {
    margin-top: 12px;
  }
  .reel-tile-title {
    font-size: 12px;
    line-height: 1.25;
  }
  .reel-tile-views {
    font-size: 10px;
    padding: 2px 5px;
  }
  .reel-tile-tag {
    font-size: 11px;
  }

  /* Map Panel & Radar Controls */
  .radar-map-panel {
    min-height: 520px;
    padding: var(--spacing-16);
  }
  .map-radar-toolbar {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 10px;
  }
  .map-mode-toggle-group {
    display: flex;
    width: 100%;
  }
  .map-mode-btn {
    flex: 1;
    text-align: center;
    padding: 8px 8px;
    font-size: 12px;
    white-space: nowrap;
  }
  .mode-label-full {
    display: none;
  }
  .mode-label-short {
    display: inline;
  }
  .map-radar-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }
  .map-portal-link,
  #autoPilotBtn {
    width: 100%;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
  }
  .vn-map-svg {
    height: 440px;
    max-width: 100%;
  }
  .map-radar-bottom-meta {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 4px;
    font-size: 11px;
  }

  /* Detail Panel & Telemetry */
  .map-detail-panel {
    padding: var(--spacing-16);
  }
  .location-buttons-wrap {
    gap: 6px;
  }
  .loc-chip {
    font-size: 13px;
    padding: 5px 10px;
  }
  .flight-telemetry-strip {
    grid-template-columns: 1fr;
    gap: 8px;
    font-size: 12px;
  }

  /* Booking & Dark Feature Nav Panel */
  .dark-feature-nav-panel {
    padding: var(--spacing-20) var(--spacing-16);
    margin-top: var(--spacing-16);
  }
  .holo-profile-card {
    padding: 16px;
  }
  .holo-header {
    font-size: 10.5px;
    letter-spacing: 0.04em;
    flex-wrap: wrap;
    gap: 4px;
  }
  .service-options-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
  }
  .service-option-card {
    padding: var(--spacing-16);
  }
  .estimator-controls {
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
  }
  .field-group select,
  .field-group input {
    font-size: 16px; /* Prevents auto-zoom on iOS Safari */
    padding: 10px 12px;
  }
  .estimate-summary-bar {
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-16);
    gap: var(--spacing-16);
  }
  .estimate-actions-wrap {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }
  .credibility-pillars-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    margin-top: var(--spacing-24);
  }
  .credibility-pillar-card {
    padding: 18px 16px;
  }
  .pillar-title {
    font-size: 15px;
  }
  .pillar-desc {
    font-size: 13px;
  }
  .estimate-actions-wrap .btn-white-inverse,
  .estimate-actions-wrap a {
    width: 100%;
    text-align: center;
    justify-content: center;
    box-sizing: border-box;
  }

  /* Footer Links */
  .footer-clusters-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-28);
  }
  .site-footer {
    padding: var(--spacing-48) 0 var(--spacing-32);
  }

  /* Drawer & Modal Mobile Full Width */
  .saved-drawer {
    max-width: 100%;
  }
  .modal-backdrop {
    padding: var(--spacing-12);
  }
  .video-modal-header {
    padding: 12px 16px;
  }
  .video-modal-footer {
    padding: 12px 16px;
    flex-direction: column;
    align-items: stretch;
  }
  .video-modal-footer .btn-white-inverse {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ==========================================================================
   COMMUNITY GROUPS STANDALONE SECTION (#EEEEEE STUDIO CANVAS)
   ========================================================================== */
.community-ecosystem-section {
  padding: var(--spacing-48) 0 var(--spacing-64);
  background: var(--color-studio-canvas);
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-20);
  margin-top: var(--spacing-32);
}

.community-card {
  background: var(--color-paper-white);
  border: 1px solid rgba(34, 34, 34, 0.08);
  border-radius: 8px;
  padding: var(--spacing-28);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease;
}

.community-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  border-color: rgba(34, 34, 34, 0.2);
}

.community-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-16);
}

.community-card-tag {
  font-family: var(--font-inter-tight);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-soft-ash);
}

.community-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  background: rgba(34, 34, 34, 0.05);
  border-radius: 4px;
  color: var(--color-charcoal-ink);
}

.community-card-title {
  font-family: var(--font-inter);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-charcoal-ink);
  margin-bottom: var(--spacing-8);
  line-height: 1.3;
}

.community-card-desc {
  font-family: var(--font-inter);
  font-size: 14px;
  line-height: 1.55;
  color: #555555;
  margin-bottom: var(--spacing-20);
}

.community-card-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-24) 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.community-card-bullets li {
  font-family: var(--font-inter-tight);
  font-size: 13px;
  line-height: 1.45;
  color: #444444;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.community-card-bullets li span.check {
  color: #16a34a;
  font-weight: 700;
  flex-shrink: 0;
}

.community-card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--color-charcoal-ink);
  color: var(--color-paper-white);
  border-radius: 4px;
  font-family: var(--font-inter);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  width: 100%;
}

.community-card-btn:hover {
  background: #000000;
  transform: translateY(-1px);
}

@media (max-width: 900px) {
  .community-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-16);
  }
}