/* ==========================================================================
   PLEROMA DESIGN STUDIOS — Architectural 3D Walkthrough Suite
   Theme: Professional White Theme / Clean Architectural Engineering
   Matches sample UI/UX color system, typography, header, nav & footer
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Studio Brand Color Tokens from Sample UI/UX */
  --studio-bg: #F8FAFC;
  --studio-surface: #FFFFFF;
  --studio-surface-subtle: #F1F5F9;
  --studio-surface-hover: #E2E8F0;
  --studio-border: #E2E8F0;
  --studio-border-strong: #CBD5E1;
  --studio-border-focus: #2563EB;
  --studio-text-main: #0F172A;
  --studio-text-secondary: #475569;
  --studio-text-muted: #64748B;
  
  --studio-accent-primary: #0F172A;
  --studio-accent-brand: #7CB305;
  --studio-accent-brand-dark: #639204;
  --studio-accent-brand-darker: #4d7303;
  --studio-accent-brand-active: #436402;
  --studio-accent-brand-light: rgba(124, 179, 5, 0.12);
  --studio-accent-blue: #2563EB;
  
  --studio-success-bg: #ECFDF5;
  --studio-success-border: #A7F3D0;
  --studio-success-text: #065F46;
  
  --studio-font-head: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --studio-font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --studio-radius-sm: 6px;
  --studio-radius-md: 10px;
  --studio-radius-lg: 14px;
  --studio-radius-xl: 20px;
  
  --studio-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --studio-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --studio-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --studio-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

/* ═══════════════════════════════════════════════════════════════
   GLOBAL RESET & PROFESSIONAL BASE
══════════════════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--studio-bg) !important;
  background-image: none !important;
  color: var(--studio-text-main) !important;
  font-family: var(--studio-font-body) !important;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--studio-font-head) !important;
  color: var(--studio-text-main) !important;
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: var(--studio-accent-blue);
  text-decoration: none;
  transition: all 0.15s ease;
}

a:hover {
  color: #1D4ED8;
}

img, video {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--studio-bg); }
::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94A3B8; }

/* ═══════════════════════════════════════════════════════════════
   FLEXBOX & GRID UTILITIES (Bootstrap Compatible)
══════════════════════════════════════════════════════════════ */
.container-fluid {
  width: 100%;
  padding-right: 1.25rem;
  padding-left: 1.25rem;
  margin-right: auto;
  margin-left: auto;
  max-width: 1560px;
}

.container {
  width: 100%;
  max-width: 1360px;
  padding-right: 1.25rem;
  padding-left: 1.25rem;
  margin-right: auto;
  margin-left: auto;
}

.d-flex { display: flex !important; }
.align-items-center { align-items: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-center { justify-content: center !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-column { flex-direction: column !important; }
.flex-grow-1 { flex-grow: 1 !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 1rem !important; }
.gap-4 { gap: 1.5rem !important; }
.ml-2 { margin-left: 0.5rem !important; }
.ml-3 { margin-left: 1rem !important; }
.mr-2 { margin-right: 0.5rem !important; }
.mr-3 { margin-right: 1rem !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.text-decoration-none { text-decoration: none !important; }

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -12px;
  margin-left: -12px;
}

.col-12, .col-lg-5, .col-lg-6, .col-lg-7, .col-md-5, .col-md-6, .col-md-7 {
  position: relative;
  width: 100%;
  padding-right: 12px;
  padding-left: 12px;
}

@media (min-width: 768px) {
  .col-md-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-md-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .text-left { text-align: left !important; }
}

@media (min-width: 992px) {
  .col-lg-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
  .col-lg-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .text-lg-right { text-align: right !important; }
  .mb-lg-0 { margin-bottom: 0 !important; }
}

/* ═══════════════════════════════════════════════════════════════
   STUDIO HEADER & NAVIGATION (Exact Sample UI/UX)
══════════════════════════════════════════════════════════════ */
.studio-site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  width: 100%;
}

.studio-header-banner {
  background: #7CB305 !important;
  background: linear-gradient(135deg, #7CB305 0%, #6fa304 100%) !important;
  padding: 0.45rem 0 !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22) !important;
}

.studio-nav-container {
  background: #639204 !important;
  border-bottom: 3px solid #4d7303 !important;
  padding: 0.25rem 0 !important;
}

#navCBELogo, .studio-logo-img {
  height: 40px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  background: #FFFFFF;
  padding: 3px 8px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform 0.15s ease, opacity 0.15s ease;
}

#navCBELogo:hover, .studio-logo-img:hover {
  transform: scale(1.02);
  opacity: 0.95;
}

.studio-subtitle-tag {
  font-family: var(--studio-font-head, 'Outfit', sans-serif);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #FFFFFF;
  font-weight: 700;
  background: rgba(0, 0, 0, 0.22);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  display: inline-block;
  white-space: nowrap;
}

.studio-title-tag {
  font-size: 0.82rem;
  letter-spacing: 0.09em;
  background: rgba(0, 0, 0, 0.28);
  border-color: rgba(255, 255, 255, 0.45);
}

.studio-edition-tag {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Studio Navigation Bar Links */
.topnav {
  background: transparent !important;
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  gap: 6px !important;
  padding: 2px 0 !important;
  margin: 0 !important;
  overflow: visible;
}

.topnav a.nav-link {
  color: rgba(255, 255, 255, 0.94) !important;
  font-family: var(--studio-font-head, 'Outfit', sans-serif) !important;
  font-size: 0.84rem !important;
  font-weight: 600 !important;
  letter-spacing: 0.01em !important;
  padding: 6px 14px !important;
  border-radius: var(--studio-radius-sm, 6px) !important;
  transition: all 0.18s ease-in-out !important;
  border: 1px solid transparent !important;
  background: transparent !important;
  margin: 0 !important;
  text-decoration: none !important;
  display: inline-flex !important;
  align-items: center !important;
  white-space: nowrap !important;
  cursor: pointer;
}

.topnav a.nav-link:hover {
  color: #FFFFFF !important;
  background: rgba(255, 255, 255, 0.22) !important;
  border-color: rgba(255, 255, 255, 0.35) !important;
  text-decoration: none !important;
  transform: translateY(-1px);
}

.topnav a.nav-link.active,
.topnav a.active {
  color: #436402 !important;
  background: #FFFFFF !important;
  border-color: #FFFFFF !important;
  font-weight: 700 !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.16) !important;
}

.topnav .nav_icon {
  display: none;
  cursor: pointer;
  padding: 6px;
}

.topnav .btn-line {
  display: block;
  width: 22px;
  height: 2.5px;
  margin: 4px 0;
  background: #FFFFFF !important;
  border-radius: 2px;
  transition: all 0.2s ease;
}

@media screen and (max-width: 992px) {
  .topnav {
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px !important;
  }
  .topnav::-webkit-scrollbar { display: none; }
  .topnav a.nav-link { display: inline-flex !important; }
}

@media (max-width: 576px) {
  .studio-title-tag { font-size: 0.72rem; padding: 3px 8px; }
  .studio-edition-tag { display: none; }
  #navCBELogo, .studio-logo-img { height: 34px; padding: 2px 6px; }
}

/* ═══════════════════════════════════════════════════════════════
   BUTTONS (Sample UI/UX Brand Theme)
══════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--studio-radius-sm, 6px);
  font-family: var(--studio-font-head, 'Outfit', sans-serif);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none !important;
}

.btn--primary {
  background: #7CB305 !important;
  background: linear-gradient(135deg, #7CB305 0%, #639204 100%) !important;
  color: #FFFFFF !important;
  box-shadow: 0 2px 6px rgba(99, 146, 4, 0.25);
  border: 1px solid #639204;
}

.btn--primary:hover {
  background: linear-gradient(135deg, #87c206 0%, #6fa304 100%) !important;
  color: #FFFFFF !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 146, 4, 0.35);
}

.btn--outline {
  background: #FFFFFF !important;
  border: 1px solid var(--studio-border-strong) !important;
  color: var(--studio-text-secondary) !important;
}

.btn--outline:hover {
  background: var(--studio-surface-subtle) !important;
  border-color: var(--studio-accent-brand) !important;
  color: var(--studio-accent-brand-dark) !important;
  transform: translateY(-1px);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--studio-border);
  color: var(--studio-text-main);
  font-size: 0.82rem;
  padding: 8px 16px;
  border-radius: var(--studio-radius-sm);
  box-shadow: var(--studio-shadow-sm);
}

.btn--ghost:hover {
  background: #FFFFFF;
  border-color: var(--studio-accent-brand);
  color: var(--studio-accent-brand-dark);
  transform: translateY(-1px);
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.78rem;
}

/* ═══════════════════════════════════════════════════════════════
   HERO / ARCHITECTURAL OVERVIEW BANNER
══════════════════════════════════════════════════════════════ */
.studio-hero-section {
  padding: 2.5rem 0 1.5rem 0;
  background: #F8FAFC;
}

.studio-overview-card {
  background: var(--studio-surface);
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--studio-shadow-md);
  position: relative;
  overflow: hidden;
}

.studio-overview-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #7CB305, #639204, #2563EB);
}

.studio-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  border-radius: 9999px;
  padding: 4px 14px;
  font-size: 0.76rem;
  font-weight: 700;
  color: #475569;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.studio-badge-green {
  background: rgba(124, 179, 5, 0.12);
  border-color: rgba(124, 179, 5, 0.35);
  color: #4d7303;
}

.studio-hero-title {
  font-family: var(--studio-font-head);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--studio-text-main);
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.studio-hero-subtitle {
  font-size: 1.05rem;
  color: var(--studio-text-secondary);
  font-weight: 400;
  line-height: 1.6;
  max-width: 840px;
  margin-bottom: 1.5rem;
}

/* Feature Quick Cards Grid */
.studio-quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--studio-border);
}

.studio-quick-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: #F8FAFC;
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-md);
  transition: all 0.2s ease;
  text-decoration: none !important;
}

.studio-quick-item:hover {
  background: #FFFFFF;
  border-color: var(--studio-accent-brand);
  box-shadow: 0 4px 12px rgba(124, 179, 5, 0.12);
  transform: translateY(-2px);
}

.studio-quick-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(124, 179, 5, 0.18), rgba(99, 146, 4, 0.12));
  color: #639204;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  font-weight: 700;
}

.studio-quick-info h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--studio-text-main);
  margin-bottom: 2px;
}

.studio-quick-info p {
  font-size: 0.78rem;
  color: var(--studio-text-muted);
  line-height: 1.35;
}

@media (max-width: 768px) {
  .studio-hero-title { font-size: 1.65rem; }
  .studio-hero-subtitle { font-size: 0.92rem; }
  .studio-overview-card { padding: 1.5rem 1.25rem; }
  .studio-quick-grid { grid-template-columns: 1fr; gap: 10px; }
}

/* ═══════════════════════════════════════════════════════════════
   SECTION HEADERS
══════════════════════════════════════════════════════════════ */
.section {
  padding: 3rem 0;
}

.section__header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.25rem auto;
}

.section__tag {
  display: inline-block;
  font-family: var(--studio-font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4d7303;
  background: rgba(124, 179, 5, 0.12);
  border: 1px solid rgba(124, 179, 5, 0.3);
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--studio-font-head);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--studio-text-main);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section__desc {
  font-size: 0.95rem;
  color: var(--studio-text-secondary);
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════
   VIDEO WALKTHROUGHS SECTION & TABS
══════════════════════════════════════════════════════════════ */
.walkthroughs {
  background: #F8FAFC;
}

.video-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  background: #F1F5F9;
  padding: 6px;
  border-radius: var(--studio-radius-lg);
  border: 1px solid var(--studio-border);
  max-width: 420px;
  margin: 0 auto 1.75rem auto;
}

.video-tab {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 18px;
  background: transparent;
  border: none;
  border-radius: var(--studio-radius-md);
  color: var(--studio-text-secondary);
  font-family: var(--studio-font-head);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
}

.video-tab:hover {
  color: var(--studio-text-main);
  background: rgba(255, 255, 255, 0.6);
}

.video-tab.active {
  background: #FFFFFF !important;
  color: #436402 !important;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.video-tab__icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #E2E8F0;
  color: var(--studio-text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.74rem;
  font-weight: 800;
  transition: all 0.18s ease;
}

.video-tab.active .video-tab__icon {
  background: #7CB305;
  color: #FFFFFF;
}

/* Video Player Wrapper */
.video-panels {
  max-width: 1080px;
  margin: 0 auto;
}

.video-panel {
  display: none;
}

.video-panel.active {
  display: block;
  animation: studioFadeUp 0.35s ease forwards;
}

.video-wrapper {
  position: relative;
  background: #000000;
  border-radius: var(--studio-radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--studio-border-strong);
  aspect-ratio: 16 / 9;
}

.video-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000000;
}

.video-label {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #FFFFFF;
  font-family: var(--studio-font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  pointer-events: none;
  z-index: 2;
}

@keyframes studioFadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════════
   REVISION 1 SECTION (Walkthrough & Minutes of Meeting)
══════════════════════════════════════════════════════════════ */
.revision-section {
  background: #FFFFFF;
  border-top: 1px solid var(--studio-border);
  border-bottom: 1px solid var(--studio-border);
  position: relative;
}

.revision-container-card {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.revision-video-block {
  background: var(--studio-surface);
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-lg);
  padding: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

/* Walkthrough Floor Chapter Navigation */
.revision-chapters {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--studio-border);
}

.revision-chapters__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding: 0 2px;
}

.revision-chapters__title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--studio-font-head);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--studio-text-secondary);
}

.revision-chapters__title svg {
  color: #7CB305;
}

.revision-chapters__hint {
  font-size: 0.76rem;
  color: var(--studio-text-muted);
  font-weight: 500;
}

.revision-chapters__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.chapter-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #F8FAFC;
  border: 1.5px solid var(--studio-border);
  border-radius: var(--studio-radius-md);
  padding: 12px 18px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  width: 100%;
  position: relative;
  outline: none;
}

.chapter-card:hover {
  background: #FFFFFF;
  border-color: #7CB305;
  box-shadow: 0 4px 14px rgba(124, 179, 5, 0.15);
  transform: translateY(-2px);
}

.chapter-card.active {
  background: #FFFFFF !important;
  border-color: #7CB305 !important;
  box-shadow: 0 0 0 3px rgba(124, 179, 5, 0.18), 0 4px 12px rgba(124, 179, 5, 0.12) !important;
}

.chapter-card__icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #E2E8F0;
  color: #0F172A;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.chapter-card:hover .chapter-card__icon,
.chapter-card.active .chapter-card__icon {
  background: #7CB305;
  color: #FFFFFF;
  transform: scale(1.06);
}

.chapter-card__body {
  flex: 1;
  min-width: 0;
}

.chapter-card__top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}

.chapter-badge {
  font-family: var(--studio-font-head);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #4d7303;
  background: rgba(124, 179, 5, 0.14);
  padding: 1px 8px;
  border-radius: 4px;
}

.chapter-timestamp {
  font-family: var(--studio-font-head);
  font-size: 0.78rem;
  color: var(--studio-text-muted);
  font-weight: 600;
}

.chapter-card__heading {
  font-family: var(--studio-font-head);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--studio-text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.chapter-card__indicator {
  display: inline-flex;
  align-items: center;
  font-family: var(--studio-font-head);
  font-size: 0.76rem;
  font-weight: 700;
  color: #639204;
  background: rgba(124, 179, 5, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  flex-shrink: 0;
  transition: all 0.18s ease;
}

.chapter-card:hover .chapter-card__indicator,
.chapter-card.active .chapter-card__indicator {
  background: #7CB305;
  color: #FFFFFF;
}

/* Minutes of Meeting (MoM) Card */
.revision-mom-card {
  background: #FFFFFF;
  border: 1.5px solid rgba(124, 179, 5, 0.3);
  border-radius: var(--studio-radius-lg);
  padding: 22px 28px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.revision-mom-card:hover {
  border-color: #7CB305;
  box-shadow: 0 6px 20px rgba(124, 179, 5, 0.1);
}

.revision-mom-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, #7CB305 0%, #639204 100%);
}

.mom-card__top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.badge-pill-mom {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--studio-font-head);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
  padding: 3px 10px;
  border-radius: 6px;
}

.mom-date {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--studio-font-head);
  font-size: 0.8rem;
  color: var(--studio-text-muted);
  font-weight: 600;
}

.mom-card__body-layout {
  display: flex;
  align-items: center;
  gap: 22px;
}

.mom-card__icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 179, 5, 0.16), rgba(99, 146, 4, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #639204;
  flex-shrink: 0;
  border: 1px solid rgba(124, 179, 5, 0.25);
}

.mom-card__details {
  flex: 1;
  min-width: 0;
}

.mom-card__title {
  font-family: var(--studio-font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--studio-text-main);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.mom-card__desc {
  font-size: 0.88rem;
  color: var(--studio-text-secondary);
  line-height: 1.55;
  margin-bottom: 10px;
}

.mom-card__filename {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: monospace;
  font-size: 0.76rem;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  color: #4d7303;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  max-width: 100%;
}

.mom-card__filename span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mom-card__actions {
  flex-shrink: 0;
}

.btn--mom {
  background: linear-gradient(135deg, #7CB305 0%, #639204 100%) !important;
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px rgba(124, 179, 5, 0.32) !important;
  padding: 12px 24px !important;
  font-weight: 700 !important;
  border: none !important;
}

.btn--mom:hover {
  background: linear-gradient(135deg, #6fa304 0%, #547c03 100%) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(124, 179, 5, 0.42) !important;
}

/* Responsive Arrangements */
@media (max-width: 992px) {
  .mom-card__body-layout {
    flex-wrap: wrap;
    gap: 16px;
  }
  .mom-card__actions {
    width: 100%;
    margin-top: 4px;
  }
  .mom-card__actions .btn {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .revision-chapters__grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .revision-chapters__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .revision-mom-card {
    padding: 18px 16px;
  }
  .revision-mom-card::before {
    width: 100%;
    height: 4px;
    top: 0;
    left: 0;
  }
  .mom-card__icon-wrap {
    width: 46px;
    height: 46px;
    border-radius: 10px;
  }
  .mom-card__icon-wrap svg {
    width: 24px;
    height: 24px;
  }
  .mom-card__title {
    font-size: 1.05rem;
  }
}

/* ═══════════════════════════════════════════════════════════════
   EXTERIOR DESIGN OPTIONS SECTION
══════════════════════════════════════════════════════════════ */
.exterior {
  background: #FFFFFF;
  border-top: 1px solid var(--studio-border);
  border-bottom: 1px solid var(--studio-border);
}

.ext-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 2.25rem;
}

.ext-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 24px;
  background: #F8FAFC;
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-md);
  color: var(--studio-text-secondary);
  font-family: var(--studio-font-head);
  font-size: 0.96rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s ease;
  min-width: 160px;
}

.ext-tab__sub {
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--studio-text-muted);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

.ext-tab:hover {
  background: #F1F5F9;
  border-color: var(--studio-border-strong);
  color: var(--studio-text-main);
  transform: translateY(-1px);
}

.ext-tab.active {
  background: #FFFFFF !important;
  border-color: #7CB305 !important;
  color: #436402 !important;
  box-shadow: 0 4px 14px rgba(124, 179, 5, 0.16) !important;
  position: relative;
}

.ext-tab.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 20%;
  right: 20%;
  height: 3px;
  background: #7CB305;
  border-radius: 3px 3px 0 0;
}

.ext-tab.active .ext-tab__sub {
  color: #639204 !important;
  font-weight: 600;
}

.ext-panel {
  display: none;
}

.ext-panel.active {
  display: block;
  animation: studioFadeUp 0.35s ease forwards;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 1.75rem;
}

.gallery-item {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-md);
  overflow: hidden;
  box-shadow: var(--studio-shadow-sm);
  cursor: pointer;
  aspect-ratio: 4 / 3;
  transition: all 0.22s ease;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.gallery-item:hover {
  border-color: var(--studio-accent-brand);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.gallery-item__overlay span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #7CB305;
  color: #FFFFFF;
  font-family: var(--studio-font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transform: translateY(6px);
  transition: transform 0.2s ease;
}

.gallery-item:hover .gallery-item__overlay {
  opacity: 1;
}

.gallery-item:hover .gallery-item__overlay span {
  transform: translateY(0);
}

/* PDF presentation bar */
.pdf-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #F8FAFC;
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-md);
  padding: 16px 20px;
  box-shadow: var(--studio-shadow-sm);
  flex-wrap: wrap;
}

.pdf-bar__info {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--studio-text-main);
  font-family: var(--studio-font-head);
  font-size: 0.95rem;
  font-weight: 700;
}

.pdf-bar__info svg {
  color: #639204;
  flex-shrink: 0;
}

.pdf-bar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ═══════════════════════════════════════════════════════════════
   PROPOSED INTERIORS SECTION
══════════════════════════════════════════════════════════════ */
.interiors {
  background: #F8FAFC;
}

.interior-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--studio-surface);
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius-lg);
  padding: 2.25rem;
  box-shadow: var(--studio-shadow-md);
  max-width: 960px;
  margin: 0 auto;
}

.interior-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 179, 5, 0.16), rgba(99, 146, 4, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #639204;
  flex-shrink: 0;
}

.interior-card__info {
  flex: 1;
}

.interior-card__info h3 {
  font-family: var(--studio-font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--studio-text-main);
  margin-bottom: 4px;
}

.interior-card__info p {
  font-size: 0.9rem;
  color: var(--studio-text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.interior-card__filename {
  display: inline-block;
  font-family: monospace;
  font-size: 0.76rem;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  color: #639204;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
}

.interior-card__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .interior-card {
    flex-direction: column;
    text-align: center;
    padding: 1.75rem 1.25rem;
  }
  .interior-card__icon { margin: 0 auto; }
  .interior-card__actions { width: 100%; justify-content: center; }
  .interior-card__actions .btn { flex: 1; }
}

/* ═══════════════════════════════════════════════════════════════
   PLEROMA ARCHITECTURAL STUDIO FOOTER (Exact Sample UI/UX)
══════════════════════════════════════════════════════════════ */
.studio-footer {
  background: #7CB305 !important;
  border-top: 3px solid #639204 !important;
  color: #FFFFFF !important;
  font-size: 0.84rem;
  padding: 36px 0 24px 0 !important;
  margin-top: 50px;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.studio-footer h5 {
  font-family: var(--studio-font-head) !important;
  font-size: 0.96rem !important;
  font-weight: 800 !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  color: #FFFFFF !important;
  margin-bottom: 10px;
}

.studio-footer p {
  color: rgba(255, 255, 255, 0.92) !important;
  line-height: 1.55;
}

.studio-footer a {
  color: #FFFFFF !important;
  font-weight: 600;
  text-decoration: underline !important;
}

.studio-footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.18) !important;
  border: 1px solid rgba(255, 255, 255, 0.3) !important;
  border-radius: 20px;
  padding: 3px 12px;
  font-family: var(--studio-font-head);
  font-size: 0.74rem;
  font-weight: 700;
  color: #FFFFFF !important;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}

.studio-footer-badge::before {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  background: #FFFFFF !important;
  border-radius: 50%;
}

/* ═══════════════════════════════════════════════════════════════
   FLOATING AUDIO CONTROLLER (Quick Music Control)
══════════════════════════════════════════════════════════════ */
.floating-controls {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
}

.audio-widget__btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: #FFFFFF;
  border: 2px solid #7CB305;
  border-radius: 100px;
  color: #436402;
  font-family: var(--studio-font-head);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(124, 179, 5, 0.25);
  transition: all 0.2s ease;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}

.audio-widget__btn:hover {
  transform: translateY(-2px);
  background: #F8FAFC;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15), 0 2px 8px rgba(124, 179, 5, 0.35);
}

.audio-widget.is-playing .audio-widget__btn {
  background: #7CB305;
  color: #FFFFFF;
  border-color: #639204;
}

/* Equalizer Bars */
.audio-widget__visualizer {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 14px;
  width: 14px;
}

.audio-widget__visualizer .bar {
  flex: 1;
  height: 3px;
  background: #7CB305;
  border-radius: 2px;
  transition: height 0.2s ease;
}

.audio-widget.is-playing .audio-widget__visualizer .bar {
  background: #FFFFFF;
}

.audio-widget.is-playing .bar--1 {
  animation: studioAudioWave 0.9s ease-in-out infinite alternate;
}
.audio-widget.is-playing .bar--2 {
  animation: studioAudioWave 1.2s ease-in-out infinite alternate 0.15s;
}
.audio-widget.is-playing .bar--3 {
  animation: studioAudioWave 0.8s ease-in-out infinite alternate 0.35s;
}
.audio-widget.is-playing .bar--4 {
  animation: studioAudioWave 1.1s ease-in-out infinite alternate 0.25s;
}

@keyframes studioAudioWave {
  0%   { height: 3px; }
  50%  { height: 14px; }
  100% { height: 5px; }
}

.audio-widget__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}

.audio-widget.is-playing .icon-play { display: none !important; }
.audio-widget.is-playing .icon-pause { display: block !important; }

@media (max-width: 600px) {
  .floating-controls { bottom: 16px; right: 16px; }
  .audio-widget__btn { padding: 8px 14px; font-size: 0.74rem; }
}

/* ═══════════════════════════════════════════════════════════════
   LIGHTBOX & MODAL SYSTEM (Sample UI/UX Clean Styling)
══════════════════════════════════════════════════════════════ */
.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.9);
  z-index: 10000;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.lightbox__img-wrap {
  max-width: 92vw;
  max-height: 86vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__img {
  max-width: 100%;
  max-height: 86vh;
  object-fit: contain;
  border-radius: var(--studio-radius-md);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.lightbox__close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
  z-index: 10002;
}

.lightbox__close:hover {
  background: #FFFFFF;
  color: #0F172A;
  transform: scale(1.08);
}

.lightbox__nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
  z-index: 10002;
}

.lightbox__nav--prev { left: 20px; }
.lightbox__nav--next { right: 20px; }

.lightbox__nav:hover {
  background: #FFFFFF;
  color: #0F172A;
  transform: translateY(-50%) scale(1.08);
}

.lightbox__caption {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  font-family: var(--studio-font-head);
  font-size: 0.84rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 20px;
}

/* PDF Modal */
.pdf-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  z-index: 10000;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 10001;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

.pdf-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 22px;
  background: #FFFFFF;
  border: 1px solid var(--studio-border);
  border-bottom: none;
  border-radius: var(--studio-radius-lg) var(--studio-radius-lg) 0 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.pdf-modal__title {
  font-family: var(--studio-font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--studio-text-main);
}

.pdf-modal__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pdf-modal__close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  color: var(--studio-text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.pdf-modal__close:hover {
  background: #E2E8F0;
  color: var(--studio-text-main);
}

.pdf-modal__body {
  flex: 1;
  background: #FFFFFF;
  border: 1px solid var(--studio-border);
  border-radius: 0 0 var(--studio-radius-lg) var(--studio-radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.pdf-modal__body iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

[hidden] {
  display: none !important;
}

/* ═══════════════════════════════════════════════════════════════
   ANTI-DOWNLOAD & CONTENT PROTECTION
══════════════════════════════════════════════════════════════ */
/* Disable user selection, drag and drop, and touch callouts across media */
img, video, canvas, iframe, .gallery-item, .gallery-item img, .lightbox__img, .video-wrapper, .interior-card, .pdf-modal {
  -webkit-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
  user-select: none !important;
  -webkit-user-drag: none !important;
  user-drag: none !important;
  -webkit-touch-callout: none !important;
}

/* Lightbox Transparent Shield Layer */
.lightbox__shield {
  position: absolute;
  inset: 0;
  z-index: 5;
  background: transparent;
  cursor: default;
}

/* Hide native video download controls */
video::-internal-media-controls-download-button {
  display: none !important;
}
video::-webkit-media-controls-enclosure {
  overflow: hidden !important;
}

/* PDF Modal Protected Badge */
.pdf-modal__protected-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--studio-font-head);
  font-size: 0.76rem;
  font-weight: 700;
  color: #065F46;
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.03em;
}

/* Protection Toast Alert */
.protection-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(40px);
  background: #0F172A;
  color: #FFFFFF;
  font-family: var(--studio-font-head);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 100px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.16);
  z-index: 999999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.protection-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.protection-toast svg {
  color: #7CB305;
  flex-shrink: 0;
}