@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&display=swap');

:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #121a2f;
  --bg-card: rgba(18, 26, 47, 0.88);
  --border-neon: #00f2fe;
  --border-neon-glow: rgba(0, 242, 254, 0.4);
  --accent-green: #2ecc71;
  --accent-pink: #ff2a7a;
  --accent-orange: #ff9f43;
  --accent-yellow: #feca57;
  --accent-purple: #9b59b6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-family: 'Be Vietnam Pro', 'Segoe UI', Arial, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

button, input, select, textarea {
  font-family: var(--font-family);
}

html, body {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  padding: 0;
  overflow: hidden; /* Cố định 100% màn hình, không bị cuộn mất thanh menu */
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 242, 254, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255, 42, 122, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, #070b14 0%, #0d1527 100%);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  user-select: none;
}

/* Header Navbar */
.app-header {
  height: 52px;
  min-height: 52px;
  background: rgba(10, 15, 29, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 242, 254, 0.18);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  z-index: 100;
  flex-shrink: 0;
}

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

.logo-icon {
  font-size: 26px;
  filter: drop-shadow(0 0 8px rgba(46, 204, 113, 0.6));
  animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #2ecc71 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.logo-text p {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 500;
  line-height: 1.2;
}

.logo-short {
  display: none;
}

/* Dedicated Game Navigation Bar */
.game-nav-bar {
  background: #080d1a;
  border-bottom: 1px solid rgba(0, 242, 254, 0.15);
  padding: 5px 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 90;
  flex-shrink: 0;
}

.game-tabs-scroll-wrapper {
  width: 100%;
  max-width: 1200px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  display: flex;
  justify-content: center;
}

.game-tabs-scroll-wrapper::-webkit-scrollbar {
  display: none;
}

.game-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 242, 254, 0.3);
}

.tab-btn.active {
  background: linear-gradient(135deg, #00f2fe 0%, #0099ff 100%);
  color: #070b14;
  font-weight: 800;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.45);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.icon-btn:hover {
  background: rgba(0, 242, 254, 0.2);
  border-color: var(--border-neon);
  transform: translateY(-1px);
}

/* Main Container Layout */
.app-main {
  flex: 1;
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  min-height: 0;
  height: auto;
  overflow: hidden;
  box-sizing: border-box;
}

/* Mobile Controls & Switchers (Strictly Hidden on Desktop) */
.mobile-view-tabs,
.mobile-bottom-bar,
.mobile-quick-bar {
  display: none !important;
}

/* Arena View (Left) */
.arena-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  position: relative;
}

.banner-marquee {
  background: linear-gradient(90deg, rgba(255, 42, 122, 0.15), rgba(0, 242, 254, 0.2), rgba(46, 204, 113, 0.15));
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
  flex-shrink: 0;
}

.marquee-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.7);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(46, 204, 113, 0.2);
  color: #2ecc71;
  border: 1px solid rgba(46, 204, 113, 0.4);
}

.status-pill.hunting {
  background: rgba(255, 42, 122, 0.2);
  color: #ff2a7a;
  border-color: rgba(255, 42, 122, 0.5);
  animation: pulse-border 1.2s infinite;
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 5px rgba(255, 42, 122, 0.5); }
  50% { box-shadow: 0 0 15px rgba(255, 42, 122, 0.8); }
}

.canvas-wrapper {
  flex: 1;
  min-height: 0;
  background: #090e1c;
  border: 3px solid var(--border-neon);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 25px var(--border-neon-glow), inset 0 0 25px rgba(0, 242, 254, 0.08);
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Overlay Stats on Canvas */
.canvas-hud {
  position: absolute;
  top: 10px;
  left: 14px;
  display: flex;
  gap: 8px;
  pointer-events: none;
  z-index: 10;
}

.hud-tag {
  background: rgba(7, 11, 20, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1.2;
}

.hud-tag span {
  color: var(--border-neon);
  font-size: 0.95rem;
}

/* Sidebar (Right 340px) */
.sidebar {
  width: 340px;
  max-height: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  padding: 14px;
  gap: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
  overflow-y: auto;
  box-sizing: border-box;
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.section-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  color: var(--border-neon);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.section-title span.count-badge {
  background: rgba(0, 242, 254, 0.18);
  color: var(--border-neon);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.78rem;
}

/* Control Groups */
.control-group {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.field-label {
  font-size: 0.84rem;
  color: #cbd5e1;
  font-weight: 600;
}

.select-input, .number-input {
  background: #090e1c;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  outline: none;
  transition: var(--transition);
}

.select-input:focus, .number-input:focus {
  border-color: var(--border-neon);
  box-shadow: 0 0 8px var(--border-neon-glow);
}

.number-input {
  width: 70px;
  text-align: center;
}

/* Mode Switcher Radio Cards */
.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.mode-card {
  position: relative;
  background: #090e1c;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
}

.mode-card input {
  position: absolute;
  opacity: 0;
}

.mode-card .mode-icon {
  font-size: 20px;
  display: block;
  margin-bottom: 4px;
}

.mode-card .mode-name {
  font-size: 0.82rem;
  font-weight: 700;
  display: block;
  color: var(--text-muted);
}

.mode-card .mode-desc {
  font-size: 0.68rem;
  color: #64748b;
  display: block;
  margin-top: 2px;
}

.mode-card.active {
  border-color: var(--border-neon);
  background: rgba(0, 242, 254, 0.1);
  box-shadow: 0 0 12px var(--border-neon-glow);
}

.mode-card.active .mode-name {
  color: #fff;
}

/* Slider Controls */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.styled-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.15);
  outline: none;
}

.styled-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--border-neon);
  cursor: pointer;
  box-shadow: 0 0 8px var(--border-neon);
  transition: var(--transition);
}

.styled-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Name List Manager */
.name-list-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.name-textarea {
  width: 100%;
  height: 110px;
  background: #090e1c;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: #e2e8f0;
  padding: 10px;
  font-family: monospace;
  font-size: 0.82rem;
  resize: vertical;
  outline: none;
  line-height: 1.4;
  transition: var(--transition);
}

.name-textarea:focus {
  border-color: var(--border-neon);
  box-shadow: 0 0 10px var(--border-neon-glow);
}

/* Class Management Bar */
.class-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.mini-btn {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #cbd5e1;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: var(--transition);
  white-space: nowrap;
  box-sizing: border-box;
}

.mini-btn:hover {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--border-neon);
  color: #fff;
}

.mini-btn.danger:hover {
  background: rgba(255, 71, 87, 0.2);
  border-color: #ff4757;
  color: #ff6b81;
}

/* Quick Add Row */
.quick-add-row {
  display: flex;
  gap: 6px;
}

.quick-input {
  flex: 1;
  background: #090e1c;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 6px 10px;
  font-size: 0.8rem;
  outline: none;
  transition: var(--transition);
}

.quick-input:focus {
  border-color: var(--border-neon);
  box-shadow: 0 0 8px var(--border-neon-glow);
}

/* Name Actions Grid (2x2) */
.name-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.save-actions {
  display: flex;
}

.name-actions {
  display: flex;
  gap: 6px;
}

.sub-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: var(--transition);
}

.sub-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.sub-btn.danger-sub:hover {
  background: rgba(255, 71, 87, 0.2);
  border-color: #ff4757;
  color: #ff6b81;
}

/* Action Execution Buttons */
.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.btn-primary {
  width: 100%;
  height: 52px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
  color: #fff;
  font-family: var(--font-family);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(46, 204, 113, 0.6);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-pause {
  background: linear-gradient(135deg, #ff9f43 0%, #e67e22 100%);
  box-shadow: 0 6px 20px rgba(255, 159, 67, 0.4);
}

.btn-pause:hover {
  box-shadow: 0 8px 25px rgba(255, 159, 67, 0.6);
}

.btn-danger {
  width: 100%;
  height: 42px;
  border: 1px solid rgba(255, 42, 122, 0.3);
  border-radius: var(--radius-md);
  background: rgba(255, 42, 122, 0.12);
  color: #ff2a7a;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-danger:hover {
  background: rgba(255, 42, 122, 0.25);
  box-shadow: 0 0 15px rgba(255, 42, 122, 0.4);
}

/* Winner Celebration Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 15, 0.88);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: #11192e;
  border: 2px solid var(--border-neon);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  max-width: 620px;
  width: 90%;
  text-align: center;
  box-shadow: 0 0 60px rgba(0, 242, 254, 0.5);
  transform: scale(0.85);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.modal-backdrop.open .modal-content {
  transform: scale(1);
}

.modal-badge {
  display: inline-block;
  background: linear-gradient(135deg, #feca57, #ff9f43);
  color: #111;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-big-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 6px;
  display: block;
}

.modal-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: #00f2fe;
  text-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
  margin-bottom: 8px;
  line-height: 1.3;
  letter-spacing: 0.3px;
}

.modal-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.winners-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  max-height: 320px;
  overflow-y: auto;
  padding: 6px 12px;
  width: 100%;
}

.winners-list::-webkit-scrollbar {
  width: 6px;
}

.winners-list::-webkit-scrollbar-thumb {
  background: rgba(0, 242, 254, 0.4);
  border-radius: 4px;
}

.winner-card {
  width: 100%;
  box-sizing: border-box;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.12), rgba(46, 204, 113, 0.15));
  border: 1.5px solid var(--border-neon);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
  animation: popIn 0.35s ease forwards;
}

.winner-card .rank-pill {
  background: linear-gradient(135deg, #feca57, #ff9f43);
  color: #0b1120;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 12px;
  flex-shrink: 0;
}

.winner-card .winner-name {
  flex: 1;
  text-align: left;
  letter-spacing: 0.5px;
}

.winner-card .crown-icon {
  font-size: 1.3rem;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn-secondary {
  padding: 12px 28px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* Confetti Canvas for Modal */
#confettiCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ========================================================
   NOTE: ALL RESPONSIVE RULES (MOBILE & TABLET) ARE LOCATED
   AT THE VERY END OF THIS FILE FOR MAXIMUM CASCADING PRIORITY
   ======================================================== */

/* ========================================================
   FIREBASE AUTH, USER MENU, PWA & ADMIN STYLES
   ======================================================== */

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-install {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.2), rgba(79, 172, 254, 0.3));
  border-color: rgba(0, 242, 254, 0.6);
  color: #00f2fe;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.25);
}

.btn-install:hover {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.35), rgba(79, 172, 254, 0.5));
  transform: translateY(-1px);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.btn-login {
  background: linear-gradient(135deg, rgba(46, 204, 113, 0.2), rgba(26, 188, 156, 0.3));
  border-color: rgba(46, 204, 113, 0.6);
  color: #2ecc71;
  box-shadow: 0 0 10px rgba(46, 204, 113, 0.25);
}

.btn-login:hover {
  background: linear-gradient(135deg, rgba(46, 204, 113, 0.35), rgba(26, 188, 156, 0.5));
  transform: translateY(-1px);
}

/* Sync Badge */
.sync-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
  transition: var(--transition);
}

.sync-badge.synced {
  border-color: rgba(46, 204, 113, 0.5);
  color: #2ecc71;
  background: rgba(46, 204, 113, 0.12);
}

.sync-badge.syncing {
  border-color: rgba(254, 202, 87, 0.5);
  color: #feca57;
  background: rgba(254, 202, 87, 0.12);
  animation: pulse 1.5s infinite;
}

.sync-badge.offline {
  border-color: rgba(255, 159, 67, 0.5);
  color: #ff9f43;
  background: rgba(255, 159, 67, 0.12);
}

/* User Menu & Dropdown */
.user-menu-wrapper {
  position: relative;
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: rgba(18, 26, 47, 0.9);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-main);
  transition: var(--transition);
}

.user-profile-btn:hover {
  border-color: var(--border-neon);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.user-avatar {
  font-size: 1.1rem;
}

.user-name {
  font-size: 0.82rem;
  font-weight: 600;
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-role-badge {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(46, 204, 113, 0.2);
  color: #2ecc71;
  border: 1px solid rgba(46, 204, 113, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.user-role-badge.admin {
  background: rgba(255, 42, 122, 0.2);
  color: #ff2a7a;
  border-color: rgba(255, 42, 122, 0.5);
  box-shadow: 0 0 6px rgba(255, 42, 122, 0.3);
}

.user-role-badge.supervisor {
  background: rgba(0, 242, 254, 0.2);
  color: #00f2fe;
  border-color: rgba(0, 242, 254, 0.5);
  box-shadow: 0 0 6px rgba(0, 242, 254, 0.3);
}

.user-tier-badge {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 800;
  text-transform: uppercase;
  background: rgba(148, 163, 184, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.3);
  letter-spacing: 0.5px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.user-tier-badge.vip {
  background: linear-gradient(135deg, rgba(254, 202, 87, 0.3), rgba(255, 107, 107, 0.3));
  color: #feca57;
  border: 1px solid #feca57;
  box-shadow: 0 0 8px rgba(254, 202, 87, 0.4);
}

.user-tier-badge.free {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.user-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 250px;
  background: #0f1629;
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6), 0 0 15px rgba(0, 242, 254, 0.15);
  padding: 8px 0;
  display: none;
  flex-direction: column;
  z-index: 1000;
  backdrop-filter: blur(12px);
}

.user-dropdown-menu.show {
  display: flex;
}

.dropdown-header {
  padding: 8px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dropdown-header strong {
  font-size: 0.82rem;
  color: var(--text-main);
  word-break: break-all;
}

.dropdown-uid {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.dropdown-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 6px 0;
}

.dropdown-item {
  width: 100%;
  padding: 8px 16px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dropdown-item:hover {
  background: rgba(0, 242, 254, 0.1);
  color: #00f2fe;
}

.dropdown-item.danger-item {
  color: #ff6b6b;
}

.dropdown-item.danger-item:hover {
  background: rgba(255, 42, 122, 0.15);
  color: #ff2a7a;
}

/* Modals General Backdrop */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.show,
.modal-backdrop.open {
  opacity: 1 !important;
  pointer-events: auto !important;
}

.modal-backdrop.show .modal-content,
.modal-backdrop.open .modal-content {
  transform: scale(1);
}

#accessGateModal.show,
#accessGateModal.open,
#adModal.show,
#adModal.open {
  opacity: 1 !important;
  pointer-events: auto !important;
  z-index: 2100 !important;
}

.auth-modal-content {
  width: 90%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7), 0 0 25px var(--border-neon-glow);
  border-radius: var(--radius-lg);
  padding: 26px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-close-x {
  position: absolute;
  top: 14px;
  right: 18px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close-x:hover {
  color: #ff2a7a;
}

/* Nút Close lớn hơn, đồng bộ giao diện Neon */
.modal-close-x.admin-close-btn {
  position: static;
  width: 42px;
  height: 42px;
  min-width: 42px;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  border-radius: 10px;
  background: rgba(255, 42, 122, 0.12);
  border: 1.5px solid rgba(255, 42, 122, 0.45);
  color: #ff2a7a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 10px rgba(255, 42, 122, 0.15);
}

.modal-close-x.admin-close-btn:hover {
  background: rgba(255, 42, 122, 0.28);
  border-color: #ff2a7a;
  color: #fff;
  transform: scale(1.06);
  box-shadow: 0 0 16px rgba(255, 42, 122, 0.5);
}

.modal-close-x.admin-close-btn:active {
  transform: scale(0.95);
}

/* Auth Tabs */
.auth-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
}

.auth-tab-btn {
  flex: 1;
  padding: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.auth-tab-btn.active {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25), rgba(79, 172, 254, 0.3));
  color: #00f2fe;
  font-weight: 700;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: rgba(10, 15, 29, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.88rem;
  transition: var(--transition);
}

.form-input:disabled,
.form-input[readonly] {
  background: rgba(255, 255, 255, 0.04);
  color: #94a3b8;
  border-color: rgba(255, 255, 255, 0.08);
  cursor: not-allowed;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
  opacity: 0.7;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-input:focus {
  outline: none;
  border-color: #00f2fe;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.auth-submit-btn {
  width: 100%;
  padding: 11px;
  margin-top: 6px;
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  border: none;
  border-radius: var(--radius-sm);
  color: #0a0f1d;
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
}

.auth-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.5);
}

.google-auth-btn {
  width: 100%;
  padding: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
}

.google-auth-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.35);
}

.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  margin: 4px 0;
}

.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.auth-divider span {
  padding: 0 10px;
}

.auth-msg {
  font-size: 0.78rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: none;
}

.auth-msg.error {
  display: block;
  background: rgba(255, 42, 122, 0.15);
  border: 1px solid rgba(255, 42, 122, 0.4);
  color: #ff6b8b;
}

.auth-msg.success {
  display: block;
  background: rgba(46, 204, 113, 0.15);
  border: 1px solid rgba(46, 204, 113, 0.4);
  color: #2ecc71;
}

/* ================= ADMIN DASHBOARD MODAL ================= */
.admin-modal-content {
  width: 96vw;
  max-width: 1440px;
  min-width: min(320px, 96vw);
  max-height: 90vh;
  background: var(--bg-card);
  border: 1.5px solid #ff2a7a;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.85), 0 0 30px rgba(255, 42, 122, 0.35);
  border-radius: var(--radius-lg);
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  resize: horizontal;
}

.admin-modal-header {
  padding: 16px 24px;
  background: rgba(15, 22, 41, 0.98);
  border-bottom: 1px solid rgba(255, 42, 122, 0.3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  gap: 16px;
  backdrop-filter: blur(8px);
}

.admin-modal-body {
  padding: 20px 24px 28px;
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ================= THANH CUỘN (SCROLLBAR) LỚN ĐỒNG BỘ GIAO DIỆN ================= */
.admin-modal-body::-webkit-scrollbar,
.admin-modal-content::-webkit-scrollbar,
.admin-table-wrapper::-webkit-scrollbar,
.auth-modal-content::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

.admin-modal-body::-webkit-scrollbar-track,
.admin-modal-content::-webkit-scrollbar-track,
.admin-table-wrapper::-webkit-scrollbar-track,
.auth-modal-content::-webkit-scrollbar-track {
  background: rgba(10, 15, 29, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
}

.admin-modal-body::-webkit-scrollbar-thumb,
.admin-modal-content::-webkit-scrollbar-thumb,
.admin-table-wrapper::-webkit-scrollbar-thumb,
.auth-modal-content::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #ff2a7a 0%, #00f2fe 100%);
  border-radius: 8px;
  border: 2px solid rgba(10, 15, 29, 0.8);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.3);
}

.admin-modal-body::-webkit-scrollbar-thumb:hover,
.admin-modal-content::-webkit-scrollbar-thumb:hover,
.admin-table-wrapper::-webkit-scrollbar-thumb:hover,
.auth-modal-content::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #ff5295 0%, #38f9d7 100%);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.6);
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.admin-stat-card {
  background: rgba(10, 15, 29, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.admin-stat-icon {
  font-size: 2rem;
}

.admin-stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: #00f2fe;
}

.admin-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.admin-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  text-align: left;
}

.admin-table th {
  background: rgba(255, 255, 255, 0.06);
  padding: 10px 14px;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
}

.admin-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  white-space: nowrap;
  vertical-align: middle;
}

.admin-table tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.table-actions-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.table-user-cell {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  white-space: nowrap;
}

.table-user-name-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.table-user-uid {
  font-size: 0.68rem;
  color: #64748b;
  font-family: monospace;
  white-space: nowrap;
}

.table-btn {
  padding: 4px 10px;
  font-size: 0.74rem;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  margin: 0 !important;
}

.table-btn.promote {
  background: rgba(254, 202, 87, 0.15);
  border-color: rgba(254, 202, 87, 0.4);
  color: #feca57;
}

.table-btn.demote {
  background: rgba(148, 163, 184, 0.15);
  border-color: rgba(148, 163, 184, 0.4);
  color: #cbd5e1;
}

.table-btn.view-detail {
  background: rgba(56, 249, 215, 0.15);
  border-color: rgba(56, 249, 215, 0.4);
  color: #38f9d7;
  margin-right: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.table-btn.view-detail:hover {
  background: rgba(56, 249, 215, 0.3);
  box-shadow: 0 0 8px rgba(56, 249, 215, 0.4);
}

.table-btn.edit-user {
  background: rgba(0, 242, 254, 0.15);
  border-color: rgba(0, 242, 254, 0.4);
  color: #00f2fe;
  margin-right: 4px;
}

.table-btn.edit-user:hover {
  background: rgba(0, 242, 254, 0.3);
}

.table-btn.delete {
  background: rgba(255, 42, 122, 0.15);
  border-color: rgba(255, 42, 122, 0.4);
  color: #ff2a7a;
  margin-left: 6px;
}

.table-btn.tier-btn {
  background: rgba(254, 202, 87, 0.15);
  border-color: rgba(254, 202, 87, 0.4);
  color: #feca57;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.table-btn.tier-btn.vip-active {
  background: linear-gradient(135deg, rgba(254, 202, 87, 0.3), rgba(255, 107, 107, 0.3));
  border-color: #feca57;
  color: #feca57;
  font-weight: 700;
}

.table-btn.tier-btn.free-active {
  background: rgba(148, 163, 184, 0.15);
  border-color: rgba(148, 163, 184, 0.3);
  color: #94a3b8;
}

.table-btn:disabled {
  opacity: 0.35 !important;
  cursor: not-allowed !important;
  filter: grayscale(1) !important;
}

.admin-quota-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 12px;
  background: rgba(0, 242, 254, 0.15);
  color: #00f2fe;
  border: 1px solid rgba(0, 242, 254, 0.4);
}

.admin-quota-badge.full {
  background: rgba(255, 42, 122, 0.15);
  color: #ff2a7a;
  border-color: rgba(255, 42, 122, 0.4);
}

.role-locked-note {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-style: italic;
  display: inline-block;
  padding: 2px 4px;
}

.table-btn.export-excel {
  background: rgba(46, 204, 113, 0.2);
  border-color: rgba(46, 204, 113, 0.5);
  color: #2ecc71;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.table-btn.export-excel:hover {
  background: rgba(46, 204, 113, 0.35);
  box-shadow: 0 0 8px rgba(46, 204, 113, 0.4);
}

.table-btn.view-list {
  background: rgba(0, 242, 254, 0.15);
  border-color: rgba(0, 242, 254, 0.4);
  color: #00f2fe;
}

.class-students-preview {
  max-width: 260px;
  font-size: 0.74rem;
  color: #cbd5e1;
  background: rgba(0, 0, 0, 0.2);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  line-height: 1.4;
  white-space: normal;
  word-break: break-word;
}

.more-students-tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(0, 242, 254, 0.15);
  color: #00f2fe;
  border: 1px solid rgba(0, 242, 254, 0.35);
  margin-left: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.more-students-tag:hover {
  background: rgba(0, 242, 254, 0.3);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.5);
}

/* ================= ADMIN DETAIL MODAL ================= */
#adminDetailModal {
  z-index: 1100;
}

.detail-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.detail-field-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 10px 14px;
  transition: border-color 0.2s ease;
}

.detail-field-box:hover {
  border-color: rgba(0, 242, 254, 0.3);
}

.detail-field-label {
  font-size: 0.7rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.detail-field-value {
  font-size: 0.88rem;
  color: #f1f5f9;
  font-weight: 600;
  word-break: break-word;
}

.detail-student-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
  padding: 14px;
  background: rgba(10, 15, 29, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
}

.student-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 6px;
  font-size: 0.82rem;
  color: #e2e8f0;
  transition: all 0.2s ease;
}

.student-chip:hover {
  background: rgba(0, 242, 254, 0.15);
  border-color: #00f2fe;
}

.student-chip-num {
  font-size: 0.7rem;
  color: #00f2fe;
  font-weight: 700;
}

/* ========================================================
   MEMBERSHIP ACCESS GATE, ADS & GESTURE STYLES
   ======================================================== */

/* Tab Lock Badges */
.tab-lock-badge {
  font-size: 0.7rem;
  margin-left: 4px;
  display: inline-flex;
  align-items: center;
  filter: drop-shadow(0 0 4px rgba(254, 202, 87, 0.6));
}

.tab-btn.active .tab-lock-badge {
  filter: none;
}

/* User Profile Status Icon & Dropdown Status Box */
.user-profile-status-icon {
  font-size: 0.72rem;
  margin-left: 2px;
}

.dropdown-profile-status-box {
  margin-top: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.72rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}

.dropdown-profile-status-box.complete {
  background: rgba(46, 204, 113, 0.12);
  border-color: rgba(46, 204, 113, 0.35);
  color: #2ecc71;
  font-weight: 600;
}

.dropdown-profile-status-box.incomplete {
  background: rgba(254, 202, 87, 0.12);
  border-color: rgba(254, 202, 87, 0.35);
  color: #feca57;
  font-weight: 600;
}

/* Access Gate Modal */
.auth-gate-modal {
  max-width: 440px;
  text-align: center;
  border: 1.5px solid rgba(0, 242, 254, 0.4);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.25);
}

.gate-features-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 8px;
}

.gate-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.gate-icon-mini {
  font-size: 1.15rem;
  line-height: 1.2;
}

.gate-feature-text strong {
  font-size: 0.82rem;
  color: #fff;
  display: block;
}

.gate-feature-text p {
  font-size: 0.73rem;
  color: var(--text-muted);
  margin: 2px 0 0 0;
  line-height: 1.35;
}

/* Monetization Ad Modal */
.ad-modal-card {
  max-width: 460px;
  background: linear-gradient(180deg, #0f172a 0%, #070c18 100%);
  border: 1.5px solid rgba(254, 202, 87, 0.5);
  box-shadow: 0 0 40px rgba(254, 202, 87, 0.25);
  padding: 18px 20px;
  text-align: center;
  position: relative;
}

.ad-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 8px;
}

.ad-sponsor-tag {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #feca57;
  text-transform: uppercase;
}

.ad-skip-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.ad-skip-btn:not(:disabled) {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #070b14;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
  font-weight: 800;
}

.ad-skip-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.ad-banner-box {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  margin-bottom: 12px;
}

.ad-sponsor-label {
  font-size: 0.68rem;
  font-weight: 800;
  color: #38bdf8;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.ad-visual-icon {
  font-size: 2.5rem;
  margin-bottom: 6px;
  filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.4));
  animation: bounce 2s infinite ease-in-out;
}

.ad-banner-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
  line-height: 1.3;
}

.ad-banner-snippet {
  font-size: 0.78rem;
  color: #cbd5e1;
  line-height: 1.45;
  margin-bottom: 12px;
}

.ad-badge-row {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.ad-pill {
  background: rgba(0, 242, 254, 0.12);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: #00f2fe;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 12px;
}

.ad-cta-link {
  display: inline-block;
  background: linear-gradient(135deg, #feca57 0%, #ff9f43 100%);
  color: #0c1222;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  padding: 9px 24px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px rgba(254, 202, 87, 0.4);
  transition: var(--transition);
}

.ad-cta-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 22px rgba(254, 202, 87, 0.6);
}

.ad-footer-note {
  font-size: 0.72rem;
  color: #94a3b8;
  line-height: 1.4;
  margin: 0;
}

/* Canvas Mobile Gestures */
.canvas-gesture-toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  background: rgba(10, 16, 30, 0.94);
  border: 1.5px solid var(--border-neon);
  color: #00f2fe;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 9px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.5);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 40;
  white-space: nowrap;
}

.canvas-gesture-toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.canvas-gesture-guide {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #94a3b8;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  pointer-events: none;
  white-space: nowrap;
  z-index: 20;
  transition: opacity 0.5s ease;
}

/* ========================================================
   RESPONSIVE DESIGN FOR MOBILE & TABLETS (<= 900px)
   Placed at the bottom for guaranteed cascading priority
   ======================================================== */
@media (max-width: 900px) {
  .desktop-only,
  [style*="display: none"],
  [style*="display:none"],
  .hidden {
    display: none !important;
  }
  /* 1. Top Header Layout */
  .app-header {
    height: 48px !important;
    min-height: 48px !important;
    padding: 0 8px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    overflow: visible !important;
    position: relative !important;
    z-index: 500 !important;
    gap: 6px !important;
  }

  .logo-area {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
    min-width: 0 !important;
  }

  .logo-icon {
    font-size: 20px !important;
  }

  .logo-text h1 {
    font-size: 0.88rem !important;
    line-height: 1.1 !important;
    margin: 0 !important;
    white-space: nowrap !important;
  }

  .logo-full {
    display: none !important;
  }

  .logo-short {
    display: inline !important;
    font-size: 0.88rem !important;
    font-weight: 800 !important;
    white-space: nowrap !important;
  }

  .logo-sub {
    display: none !important;
  }

  /* 2. Header Utility Buttons */
  .header-actions {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    flex-shrink: 0 !important;
    position: relative !important;
  }

  .action-btn-text,
  .sync-text,
  .user-name {
    display: none !important;
  }

  .sync-badge {
    padding: 3px 6px !important;
    font-size: 0.72rem !important;
    border-radius: 12px !important;
    height: 30px !important;
    min-width: auto !important;
    box-sizing: border-box !important;
    align-items: center;
    justify-content: center;
    gap: 0 !important;
  }

  .btn-install,
  .btn-login {
    padding: 4px 8px !important;
    font-size: 0.78rem !important;
    height: 30px !important;
    min-width: 30px !important;
    box-sizing: border-box !important;
    align-items: center;
    justify-content: center;
    gap: 4px !important;
  }

  .user-profile-btn {
    padding: 3px 6px !important;
    height: 30px !important;
    gap: 4px !important;
    box-sizing: border-box !important;
    display: inline-flex !important;
    align-items: center !important;
  }

  .user-avatar {
    font-size: 1rem !important;
  }

  .user-role-badge {
    font-size: 0.6rem !important;
    padding: 1px 4px !important;
  }

  .icon-btn {
    width: 30px !important;
    height: 30px !important;
    min-width: 30px !important;
    font-size: 0.85rem !important;
    padding: 0 !important;
    flex-shrink: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .user-dropdown-menu {
    width: 270px !important;
    max-width: calc(100vw - 16px) !important;
    right: 0 !important;
  }

  .user-dropdown-menu.show {
    display: flex !important;
    position: fixed !important;
    top: 52px !important;
    right: 8px !important;
    z-index: 2200 !important;
  }

  /* 3. Game Navigation Bar */
  .game-nav-bar {
    height: 38px !important;
    min-height: 38px !important;
    padding: 2px 6px !important;
    box-sizing: border-box !important;
  }

  .game-tabs-scroll-wrapper {
    justify-content: flex-start !important;
    padding: 0 2px !important;
  }

  .tab-btn {
    padding: 4px 10px !important;
    font-size: 0.74rem !important;
    border-radius: 16px !important;
  }

  /* 4. Main Flex Container */
  .app-main {
    flex: 1 !important;
    min-height: 0 !important;
    height: auto !important;
    max-height: none !important;
    flex-direction: column !important;
    padding: 6px 8px 8px 8px !important;
    overflow: hidden !important;
    gap: 0 !important;
    box-sizing: border-box !important;
  }

  /* 5. Mobile View Switcher (Sàn Đấu vs Lớp Học) */
  .mobile-view-tabs {
    display: flex !important;
    gap: 6px !important;
    width: 100% !important;
    height: 36px !important;
    min-height: 36px !important;
    background: rgba(15, 23, 42, 0.95) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: var(--radius-md) !important;
    padding: 2px 3px !important;
    margin-bottom: 6px !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
  }

  .mobile-view-btn {
    flex: 1 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    padding: 6px 10px !important;
    background: transparent !important;
    border: none !important;
    color: var(--text-muted) !important;
    font-size: 0.8rem !important;
    font-weight: 700 !important;
    border-radius: var(--radius-sm) !important;
    cursor: pointer !important;
    transition: var(--transition) !important;
  }

  .mobile-view-btn.active {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.25), rgba(79, 172, 254, 0.3)) !important;
    color: #00f2fe !important;
    border: 1px solid rgba(0, 242, 254, 0.5) !important;
  }

  .mobile-count-badge {
    background: rgba(0, 242, 254, 0.25) !important;
    color: #00f2fe !important;
    font-size: 0.68rem !important;
    padding: 1px 6px !important;
    border-radius: 10px !important;
  }

  /* 6. Active View Handling */
  .app-main.view-arena .arena-container {
    display: flex !important;
    flex-direction: column !important;
    flex: 1 !important;
    min-height: 0 !important;
    height: auto !important;
    width: 100% !important;
    overflow: hidden !important;
  }

  .app-main.view-arena .sidebar {
    display: none !important;
  }

  .app-main.view-sidebar .arena-container {
    display: none !important;
  }

  .app-main.view-sidebar .sidebar {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    max-width: 100% !important;
    flex: 1 !important;
    min-height: 0 !important;
    height: auto !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 10px !important;
    box-sizing: border-box !important;
    gap: 10px !important;
  }

  /* 7. Arena Container & Canvas Details */
  .banner-marquee {
    flex-shrink: 0 !important;
    height: 32px !important;
    min-height: 32px !important;
    padding: 4px 8px !important;
    box-sizing: border-box !important;
  }

  .marquee-title {
    font-size: 0.76rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .status-pill {
    font-size: 0.65rem !important;
    padding: 2px 6px !important;
    flex-shrink: 0 !important;
  }

  .canvas-wrapper {
    flex: 1 !important;
    min-height: 0 !important;
    height: 100% !important;
    width: 100% !important;
    position: relative !important;
    border-width: 2px !important;
    overflow: hidden !important;
    border-radius: 0 0 var(--radius-md) var(--radius-md) !important;
    cursor: pointer !important;
    touch-action: manipulation !important;
    user-select: none !important;
    -webkit-user-select: none !important;
  }

  .canvas-hud {
    top: 6px !important;
    left: 6px !important;
    gap: 4px !important;
    flex-wrap: wrap !important;
  }

  .hud-tag {
    padding: 2px 7px !important;
    font-size: 0.68rem !important;
  }

  /* 8. Fixed Bottom Controls Bar (ALWAYS PINNED, NEVER OFFSCREEN) */
  .mobile-bottom-bar,
  .mobile-quick-bar {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    height: 48px !important;
    min-height: 48px !important;
    width: 100% !important;
    flex-shrink: 0 !important;
    margin-top: 6px !important;
    padding: 4px !important;
    background: rgba(10, 16, 30, 0.96) !important;
    border: 1px solid rgba(0, 242, 254, 0.3) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5), 0 0 10px rgba(0, 242, 254, 0.15) !important;
    box-sizing: border-box !important;
    z-index: 80 !important;
  }

  .mobile-act-btn {
    height: 38px !important;
    border-radius: var(--radius-sm) !important;
    cursor: pointer !important;
    font-weight: 800 !important;
    font-size: 0.85rem !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    transition: var(--transition) !important;
    box-sizing: border-box !important;
  }

  .mobile-act-btn.start {
    flex: 1 !important;
    background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%) !important;
    border: none !important;
    color: #070b14 !important;
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.4) !important;
  }

  .mobile-act-btn.pause {
    flex: 1 !important;
    background: linear-gradient(135deg, #feca57 0%, #ff9f43 100%) !important;
    border: none !important;
    color: #111 !important;
    box-shadow: 0 0 12px rgba(254, 202, 87, 0.4) !important;
  }

  .mobile-act-btn.reset {
    width: 38px !important;
    min-width: 38px !important;
    background: rgba(255, 42, 122, 0.15) !important;
    border: 1px solid rgba(255, 42, 122, 0.4) !important;
    color: #ff2a7a !important;
    font-size: 1.1rem !important;
    flex-shrink: 0 !important;
  }

  .mobile-act-btn.settings {
    padding: 0 10px !important;
    background: rgba(255, 255, 255, 0.08) !important;
    border: 1px solid rgba(255, 255, 255, 0.15) !important;
    color: #cbd5e1 !important;
    font-size: 0.78rem !important;
    flex-shrink: 0 !important;
    white-space: nowrap !important;
  }

  /* 9. Modals on Mobile */
  .modal-content,
  .auth-modal-content,
  .admin-modal-content {
    width: 95% !important;
    padding: 18px 14px !important;
    max-height: 90vh !important;
    overflow-y: auto !important;
  }

  .modal-big-icon {
    font-size: 36px !important;
  }

  .modal-title {
    font-size: 1.2rem !important;
  }

  .winners-list {
    max-height: 220px !important;
  }

  .form-grid-2 {
    grid-template-columns: 1fr !important;
  }

  .admin-stats-grid {
    grid-template-columns: 1fr !important;
    gap: 8px !important;
  }
}

/* Specific tweaks for screens <= 480px (Smartphones) */
@media (max-width: 480px) {
  .logo-short {
    font-size: 0.82rem !important;
  }
  .app-header {
    padding: 0 6px !important;
  }
  .header-actions {
    gap: 3px !important;
  }
  .sync-badge {
    padding: 2px 5px !important;
  }
  .btn-install,
  .btn-login {
    padding: 4px 6px !important;
    font-size: 0.75rem !important;
  }
  .icon-btn {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px !important;
    font-size: 0.8rem !important;
  }
}

/* Extra small mobile devices <= 360px */
@media (max-width: 360px) {
  .logo-text h1 {
    font-size: 0.76rem !important;
  }
  .logo-icon {
    font-size: 18px !important;
  }
  .btn-login-text {
    display: none !important;
  }
  .mobile-act-btn {
    font-size: 0.78rem !important;
  }
}