/* ==========================================================================
   UniTogether - Design System & Custom Stylesheet
   University Watch Party & Collaborative Streaming Platform
   ========================================================================== */

:root {
  /* Brand Crimson Palette */
  --primary-red: #d9232a;
  --primary-red-hover: #b91c22;
  --primary-red-dark: #8e1014;
  --primary-red-light: #fef2f2;
  --primary-red-glow: rgba(217, 35, 42, 0.25);
  --primary-gradient: linear-gradient(145deg, #e52d27 0%, #c4181d 45%, #9b0f14 100%);
  --navbar-gradient: linear-gradient(90deg, #d9232a 0%, #c4181d 50%, #b31217 100%);

  /* Secondary & Accents */
  --accent-gold: #ffc83b;
  --accent-gold-hover: #e6b22c;
  --accent-gold-text: #6b1d00;
  --badge-yellow: #ffd43f;
  --badge-yellow-text: #7a2200;

  /* Neutral Light Theme */
  --bg-app: #fbf8f5;
  --bg-card: #ffffff;
  --bg-card-subtle: #f8fafc;
  --bg-input: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --border-focus: #d9232a;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.12), 0 6px 12px -3px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 20px 40px -15px rgba(217, 35, 42, 0.15), 0 10px 25px -5px rgba(0, 0, 0, 0.08);

  /* Dimensions */
  --navbar-height: 58px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}


/* Base Setup */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Ambient Background Glow for Landing */
.auth-page-wrapper {
  min-height: calc(100vh - var(--navbar-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 1rem;
  position: relative;
  background: radial-gradient(circle at 15% 20%, rgba(217, 35, 42, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 85% 80%, rgba(255, 200, 59, 0.1) 0%, transparent 45%),
              var(--bg-app);
}

/* Screen Fit Lock for Desktop - Prevents Scrollbars on Standard Laptop/Desktop Screens */
body.auth-page-body {
  height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
}

@media (min-width: 993px) {
  body.auth-page-body {
    overflow: hidden;
  }

  body.auth-page-body .auth-page-wrapper {
    height: calc(100vh - var(--navbar-height));
    min-height: 0;
    padding: 0.75rem 1.5rem;
    overflow: hidden;
  }
}

@media (min-width: 993px) and (max-height: 580px) {
  body.auth-page-body {
    overflow-y: auto !important;
    height: auto !important;
  }
  body.auth-page-body .auth-page-wrapper {
    height: auto !important;
    min-height: calc(100vh - var(--navbar-height)) !important;
    padding: 1rem !important;
    overflow: visible !important;
  }
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */

.uni-navbar {
  height: var(--navbar-height);
  background: var(--navbar-gradient);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 0 1.5rem;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  user-select: none;
}

.brand-logo-badge {
  width: 34px;
  height: 34px;
  background: #ffffff;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  padding: 3px;
}

.brand-logo-badge img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin: 0;
  display: flex;
  align-items: center;
}

.brand-title .uni-txt {
  color: #ffffff;
  font-weight: 800;
}

.brand-title .together-txt {
  color: var(--accent-gold);
  font-weight: 800;
  margin-left: 2px;
}

/* Nav Action Buttons */
.btn-instant-room {
  background-color: var(--accent-gold);
  color: var(--accent-gold-text);
  font-weight: 700;
  font-size: 0.84rem;
  border-radius: var(--radius-full);
  padding: 0.42rem 1.15rem;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

.btn-instant-room:hover {
  background-color: var(--accent-gold-hover);
  color: var(--accent-gold-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-instant-room:active {
  transform: translateY(0);
}

.nav-link-custom {
  color: rgba(255, 255, 255, 0.88);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.42rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==========================================================================
   Navigation Auth Elements (SIGN IN button & Logged-in User Badge)
   ========================================================================== */
.nav-auth-container {
  display: flex;
  align-items: center;
  position: relative;
}

.user-dropdown-wrapper {
  position: relative;
  display: inline-block;
}

.user-custom-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.08);
  overflow: hidden;
  z-index: 99999;
}

.user-custom-dropdown .dropdown-item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 8px 16px;
  clear: both;
  font-weight: 500;
  font-size: 13px;
  color: #1f2937;
  text-decoration: none;
  background-color: transparent;
  border: 0;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.user-custom-dropdown .dropdown-item:hover {
  background-color: #f3f4f6;
  color: #111827;
}

.user-custom-dropdown .dropdown-item:active {
  background-color: #e5e7eb;
}

.btn-sign-in {
  background-color: #facc15;
  color: #450a0a !important;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 6px 18px;
  border-radius: 9999px;
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s, transform 0.1s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.btn-sign-in:hover {
  background-color: #eab308;
  color: #450a0a !important;
  transform: translateY(-1px);
}

.btn-user-badge {
  background-color: #facc15;
  color: #450a0a !important;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 6px 16px;
  border-radius: 9999px;
  border: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  transition: background-color 0.15s, transform 0.1s;
}

.btn-user-badge:hover,
.btn-user-badge:focus {
  background-color: #eab308;
  color: #450a0a !important;
  transform: translateY(-1px);
}

.nav-link-custom:hover,
.nav-link-custom.active {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Central Auth Card (Matching Screenshot Pixel-Perfect)
   ========================================================================== */

.auth-container-card {
  width: 100%;
  max-width: 940px;
  max-height: calc(100vh - var(--navbar-height) - 1.5rem);
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  margin: 0 auto;
}

/* Left Hero Showcase Banner */
.auth-hero-banner {
  flex: 0 0 40%;
  background: var(--primary-gradient);
  padding: 2rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  color: #ffffff;
}

.auth-hero-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  left: -60px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.auth-hero-banner::after {
  content: '';
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-logo-box {
  width: 54px;
  height: 54px;
  background: #ffffff;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
  margin-bottom: 0.75rem;
}

.hero-logo-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero-hub-badge {
  background: var(--badge-yellow);
  color: var(--badge-yellow-text);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.85rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  display: inline-block;
}

.hero-hub-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.hero-main-headline {
  font-size: 1.38rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero-sub-text {
  font-size: 0.86rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.92);
  margin: 0;
  max-width: 290px;
}

/* Right Form Area */
.auth-form-area {
  flex: 1 1 60%;
  padding: 1.5rem 2rem 1.15rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  max-height: 100%;
  overflow-y: auto;
}

.auth-form-area::-webkit-scrollbar {
  width: 5px;
}
.auth-form-area::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 4px;
}

.auth-header-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 0.2rem;
}

.auth-header-title .brand-accent {
  color: var(--primary-red);
}

.auth-header-subtitle {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* Segmented Tab Bar */
.auth-nav-tabs {
  background-color: var(--bg-card-subtle);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-color);
}

.auth-tab-btn {
  flex: 1;
  padding: 0.45rem 0.85rem;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.auth-tab-btn.active {
  background-color: var(--primary-red);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-red-glow);
}

.auth-tab-btn:hover:not(.active) {
  color: var(--text-main);
  background-color: rgba(0, 0, 0, 0.04);
}

/* SSO / Social Logins */
.sso-buttons-row {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.btn-sso {
  flex: 1;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.42rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  min-height: 38px;
}

.btn-sso:hover {
  background-color: var(--bg-card-subtle);
  border-color: #cbd5e1;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-sso img,
.btn-sso svg {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

/* Form Divider */
.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 0.6rem 0 0.75rem;
  color: var(--text-light);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}

.auth-divider span {
  padding: 0 0.75rem;
}

/* Form Controls */
.form-group-custom {
  margin-bottom: 0.75rem;
  position: relative;
}

.form-label-custom {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-label-custom .forgot-link {
  color: var(--primary-red);
  font-weight: 600;
  font-size: 0.78rem;
  text-decoration: none;
  transition: var(--transition);
}

.form-label-custom .forgot-link:hover {
  color: var(--primary-red-hover);
  text-decoration: underline;
}

.input-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-prefix {
  position: absolute;
  left: 0.85rem;
  color: var(--text-light);
  font-size: 0.92rem;
  pointer-events: none;
  display: flex;
  align-items: center;
}

.input-custom {
  width: 100%;
  height: 40px;
  padding: 0.5rem 0.85rem 0.5rem 2.45rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-main);
  font-size: 0.88rem;
  transition: var(--transition);
}

.input-custom:focus {
  outline: none;
  border-color: var(--primary-red);
  box-shadow: 0 0 0 3px var(--primary-red-glow);
}

.input-icon-suffix {
  position: absolute;
  right: 0.85rem;
  color: var(--text-light);
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.input-icon-suffix:hover {
  color: var(--text-main);
}

select.input-custom {
  cursor: pointer;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 1.5rem;
}

/* Custom Checkbox */
.custom-checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
  user-select: none;
}

.custom-checkbox-input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary-red);
  cursor: pointer;
}

.custom-checkbox-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 500;
}

/* Primary Auth Action Button */
.btn-auth-submit {
  width: 100%;
  height: 42px;
  background-color: var(--primary-red);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  box-shadow: 0 3px 12px var(--primary-red-glow);
  transition: var(--transition);
}

.btn-auth-submit:hover {
  background-color: var(--primary-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(217, 35, 42, 0.35);
}

.btn-auth-submit:active {
  transform: translateY(0);
}

/* Card Bottom Footer */
.auth-card-footer {
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-guest-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}

.btn-guest-action {
  border: 1px solid #ffd43f;
  background: #fffdf5;
  color: #8a4800;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-guest-action:hover {
  background: #fff4cc;
  color: #723b00;
  border-color: #f59e0b;
  transform: translateY(-1px);
}

/* ==========================================================================
   Watch Party Hub (Rooms Explorer Page)
   ========================================================================== */

.hub-hero-section {
  background: linear-gradient(135deg, rgba(217, 35, 42, 0.08) 0%, rgba(255, 200, 59, 0.08) 100%);
  padding: 3rem 1.5rem 2.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.hub-hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.hub-hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
}

/* Room Search & Join Bar */
.room-join-bar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.5rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 720px;
}

.room-join-bar-card input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--text-main);
  font-size: 0.95rem;
  width: 100%;
}

/* Room Category Filter Pills */
.category-filter-bar {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.75rem;
}

.category-pill {
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.category-pill:hover,
.category-pill.active {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
  box-shadow: 0 2px 8px var(--primary-red-glow);
}

/* Room Cards Grid */
.room-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

.room-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(217, 35, 42, 0.4);
}

.room-card-thumbnail {
  position: relative;
  width: 100%;
  height: 180px;
  background: #000;
  overflow: hidden;
}

.room-card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.room-card:hover .room-card-thumbnail img {
  transform: scale(1.04);
}

.room-live-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(220, 38, 38, 0.92);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background-color: #fff;
  border-radius: 50%;
  animation: pulse-animation 1.5s infinite;
}

@keyframes pulse-animation {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.room-viewers-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(15, 23, 42, 0.75);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.room-media-type-badge {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.75);
  color: #f8fafc;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.room-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.room-topic-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-red);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.room-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.room-card-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.host-avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-color);
}

.host-name-txt {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ==========================================================================
   Interactive Watch Party Room (The Core Live Experience)
   ========================================================================== */

.room-layout-container {
  display: flex;
  height: calc(100vh - var(--navbar-height));
  width: 100%;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* Main Theater Stage (Left 70-75%) */
.room-stage-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  gap: 1rem;
  position: relative;
}

/* Room Info Bar */
.room-header-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.5rem 0.25rem;
}

.room-title-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.room-live-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0;
  letter-spacing: -0.01em;
}

.room-code-badge {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: var(--transition);
}

.room-code-badge:hover {
  background-color: var(--primary-red-light);
  color: var(--primary-red);
  border-color: var(--primary-red);
}

.sync-status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.sync-dot-green {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
}

/* Theater Media Player Container */
.video-theater-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 68vh;
  background: #000000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.video-theater-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Synchronized Broadcast Notification Overlay */
.sync-broadcast-toast {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.88);
  color: #ffffff;
  padding: 0.4rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 20;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.sync-broadcast-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(5px);
}

/* Floating Emoji Reaction Canvas Overlay */
.reaction-canvas-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 15;
}

.floating-reaction-item {
  position: absolute;
  bottom: 60px;
  font-size: 2.2rem;
  user-select: none;
  animation: float-up-fade 2.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes float-up-fade {
  0% {
    transform: translateY(0) scale(0.6) rotate(0deg);
    opacity: 0.9;
  }
  50% {
    transform: translateY(-160px) scale(1.25) rotate(15deg);
    opacity: 1;
  }
  100% {
    transform: translateY(-340px) scale(0.9) rotate(-15deg);
    opacity: 0;
  }
}

/* Custom Video Controls Bar */
.theater-controls-bar {
  position: relative;
  z-index: 10;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.4) 60%, transparent 100%);
  padding: 1.5rem 1.25rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: opacity 0.3s ease;
}

.timeline-slider-container {
  width: 100%;
  position: relative;
  cursor: pointer;
  height: 8px;
  display: flex;
  align-items: center;
}

.timeline-progress-bg {
  width: 100%;
  height: 5px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  transition: height 0.15s ease;
}

.timeline-slider-container:hover .timeline-progress-bg {
  height: 8px;
}

.timeline-progress-fill {
  height: 100%;
  background: var(--primary-red);
  width: 28%;
  border-radius: var(--radius-full);
  position: relative;
}

.controls-row-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #ffffff;
}

.controls-left-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.btn-player-action {
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.2rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-player-action:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--accent-gold);
}

.time-display-txt {
  font-size: 0.84rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  font-variant-numeric: tabular-nums;
}

.volume-control-wrapper {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.volume-slider-range {
  width: 70px;
  accent-color: var(--primary-red);
  cursor: pointer;
}

.controls-right-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Toast Panel / Floating WebRTC Face-Cams (Design from README & Project Plan) */
.floating-facecam-toast-panel {
  position: absolute;
  top: 70px;
  right: 20px;
  width: 280px;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  z-index: 25;
  overflow: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.facecam-header-strip {
  padding: 0.5rem 0.85rem;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: move;
  color: #f8fafc;
  font-size: 0.82rem;
  font-weight: 700;
}

.facecam-grid-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 8px;
}

.facecam-tile {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #1e293b;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
}

.facecam-tile.speaking {
  border-color: #10b981;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.facecam-tile img,
.facecam-tile video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.facecam-user-tag {
  position: absolute;
  bottom: 4px;
  left: 4px;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  max-width: 85%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.facecam-mic-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  background: rgba(0, 0, 0, 0.65);
  color: #ef4444;
  font-size: 0.68rem;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
}

/* Quick Action Bar Below Video */
.stage-action-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: var(--bg-card);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.reaction-trigger-cluster {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-emoji-reaction {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  font-size: 1.25rem;
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-emoji-reaction:hover {
  transform: scale(1.2) translateY(-2px);
  background-color: var(--primary-red-light);
  border-color: var(--primary-red);
}

.media-source-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition);
}

.media-source-pill:hover {
  background: var(--primary-red-light);
  border-color: var(--primary-red);
  color: var(--primary-red);
}

/* ==========================================================================
   Multifunctional Right Sidebar (5 Tabs)
   ========================================================================== */

.room-sidebar-area {
  width: 380px;
  flex: 0 0 380px;
  border-left: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.sidebar-tab-header {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
  padding: 0.25rem;
  gap: 0.25rem;
}

.sidebar-nav-tab {
  flex: 1;
  padding: 0.65rem 0.35rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.sidebar-nav-tab i {
  font-size: 1.05rem;
}

.sidebar-nav-tab.active {
  background: var(--bg-card);
  color: var(--primary-red);
  box-shadow: var(--shadow-sm);
}

.sidebar-nav-tab .tab-badge-count {
  position: absolute;
  top: 4px;
  right: 6px;
  background: var(--primary-red);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-full);
}

/* Sidebar Tab Panes */
.sidebar-tab-content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.tab-pane-view {
  display: none;
  flex-direction: column;
  height: 100%;
}

.tab-pane-view.active {
  display: flex;
}

/* Tab 1: Live Chat Pane */
.chat-messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.chat-message-bubble {
  display: flex;
  gap: 0.65rem;
}

.chat-sender-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.chat-content-box {
  flex: 1;
}

.chat-sender-info {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.2rem;
}

.sender-nickname {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
}

.sender-role-badge {
  font-size: 0.68rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
}

.sender-role-badge.host {
  background: rgba(217, 35, 42, 0.15);
  color: var(--primary-red);
}

.sender-role-badge.member {
  background: rgba(59, 130, 246, 0.15);
  color: #2563eb;
}

.chat-time-tag {
  font-size: 0.72rem;
  color: var(--text-light);
  margin-left: auto;
}

.chat-text-payload {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 0.55rem 0.85rem;
  border-radius: 4px 14px 14px 14px;
  font-size: 0.88rem;
  color: var(--text-main);
  line-height: 1.45;
  word-break: break-word;
}

.chat-attachment-card {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  margin-top: 0.4rem;
  text-decoration: none;
  color: var(--text-main);
  transition: var(--transition);
}

.chat-attachment-card:hover {
  background: var(--primary-red-light);
  border-color: var(--primary-red);
}

.chat-input-bar {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chat-input-field {
  flex: 1;
  height: 40px;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--bg-input);
  color: var(--text-main);
  font-size: 0.88rem;
}

.chat-input-field:focus {
  outline: none;
  border-color: var(--primary-red);
}

.btn-chat-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-chat-icon:hover {
  color: var(--primary-red);
  background: var(--primary-red-light);
}

.btn-chat-send {
  background: var(--primary-red);
  color: #fff;
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-chat-send:hover {
  background: var(--primary-red-hover);
  transform: scale(1.05);
}

/* Tab 2: Shared Playlist Queue */
.playlist-container {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
  overflow-y: auto;
}

.playlist-add-box {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.playlist-item-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.playlist-item-card.now-playing {
  border-color: var(--primary-red);
  background: var(--primary-red-light);
}

.playlist-thumb {
  width: 60px;
  height: 42px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.playlist-item-info {
  flex: 1;
  min-width: 0;
}

.playlist-item-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.15rem;
}

.playlist-item-meta {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.btn-vote-up {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-vote-up:hover,
.btn-vote-up.voted {
  background: var(--primary-red);
  color: #fff;
  border-color: var(--primary-red);
}

/* Tab 3: Member Roster */
.members-list-container {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  overflow-y: auto;
}

.member-row-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.member-profile-combo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.member-avatar-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.member-name-tag {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Tab 4: Collaborative Notes (ER diagram Note entity) */
.notes-container {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1;
}

.notes-toolbar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-card-subtle);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.btn-note-tool {
  background: transparent;
  border: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
}

.btn-note-tool:hover {
  background: rgba(0, 0, 0, 0.08);
  color: var(--text-main);
}

.notes-textarea {
  flex: 1;
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  background: var(--bg-input);
  color: var(--text-main);
  font-size: 0.9rem;
  line-height: 1.6;
  resize: none;
  font-family: inherit;
}

.notes-textarea:focus {
  outline: none;
  border-color: var(--primary-red);
}

.notes-save-indicator {
  font-size: 0.75rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Tab 5: Room Settings & Admin Controls */
.settings-container {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex: 1;
  overflow-y: auto;
}

.setting-toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.setting-label-bold {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.15rem;
}

.setting-desc-subtle {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0;
}

/* ==========================================================================
   Modals & Popups
   ========================================================================== */

.modal-content-custom {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.modal-header-custom {
  background: var(--bg-card-subtle);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}

.modal-title-custom {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
}

/* Toast Notification Alert */
.app-toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1090;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.app-toast {
  background: #0f172a;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border-left: 4px solid var(--primary-red);
  animation: slide-in-toast 0.3s ease forwards;
}

@keyframes slide-in-toast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 992px) {
  body.auth-page-body {
    height: auto;
    overflow-y: auto;
  }

  .auth-container-card {
    flex-direction: column;
    max-height: none;
    max-width: 540px;
  }
  
  .auth-hero-banner {
    padding: 1.5rem 1.25rem;
  }

  .auth-form-area {
    padding: 1.5rem 1.25rem;
    overflow-y: visible;
  }

  .room-layout-container {
    flex-direction: column;
    height: auto;
  }

  .room-sidebar-area {
    width: 100%;
    flex: auto;
    height: 520px;
    border-left: none;
    border-top: 1px solid var(--border-color);
  }

  .floating-facecam-toast-panel {
    top: 10px;
    right: 10px;
    width: 220px;
  }
}

@media (max-width: 576px) {
  .sso-buttons-row {
    flex-direction: column;
  }
  
  .brand-title {
    font-size: 1.1rem;
  }

  .btn-instant-room {
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
  }
}