/* ==========================================================================
   STOP DIGITAL PRO - Material Design 3 & Play Store Theme
   ========================================================================== */

:root {
  /* Colors - MD3 Dark Theme Default */
  --md-sys-color-background: #0d0e15;
  --md-sys-color-surface: #171822;
  --md-sys-color-surface-variant: rgba(32, 34, 48, 0.7);
  --md-sys-color-surface-glass: rgba(28, 30, 44, 0.65);
  
  --md-sys-color-primary: #8C62FF;
  --md-sys-color-primary-container: rgba(140, 98, 255, 0.18);
  --md-sys-color-on-primary: #ffffff;
  
  --md-sys-color-secondary: #00E5FF;
  --md-sys-color-secondary-container: rgba(0, 229, 255, 0.15);
  --md-sys-color-on-secondary: #00363a;
  
  --md-sys-color-error: #FF5252;
  --md-sys-color-error-container: rgba(255, 82, 82, 0.18);
  
  --md-sys-color-success: #00E676;
  --md-sys-color-success-container: rgba(0, 230, 118, 0.18);
  
  --md-sys-color-warning: #FFB300;
  
  --md-sys-color-on-surface: #f3f4f8;
  --md-sys-color-on-surface-variant: #a0a5b8;
  --md-sys-color-outline: rgba(255, 255, 255, 0.12);
  --md-sys-color-outline-focus: #8C62FF;

  /* Elevation Shadows */
  --md-shadow-1: 0 4px 20px rgba(0, 0, 0, 0.3);
  --md-shadow-2: 0 12px 36px rgba(0, 0, 0, 0.45);
  --md-shadow-glow: 0 0 25px rgba(140, 98, 255, 0.35);
  --md-shadow-stop: 0 10px 30px rgba(255, 82, 82, 0.45);

  /* Glassmorphism */
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-backdrop: blur(20px);
  
  /* Radii */
  --radius-xs: 12px;
  --radius-sm: 18px;
  --radius-md: 24px;
  --radius-lg: 32px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

body.light-mode {
  --md-sys-color-background: #f4f5fa;
  --md-sys-color-surface: #ffffff;
  --md-sys-color-surface-variant: rgba(240, 242, 248, 0.8);
  --md-sys-color-surface-glass: rgba(255, 255, 255, 0.75);
  
  --md-sys-color-primary: #673AB7;
  --md-sys-color-primary-container: #ede7f6;
  --md-sys-color-on-primary: #ffffff;
  
  --md-sys-color-secondary: #00838F;
  --md-sys-color-secondary-container: #e0f7fa;
  
  --md-sys-color-error: #D32F2F;
  --md-sys-color-error-container: #ffebee;
  
  --md-sys-color-on-surface: #1a1b24;
  --md-sys-color-on-surface-variant: #5f6368;
  --md-sys-color-outline: rgba(0, 0, 0, 0.12);
  
  --glass-border: 1px solid rgba(0, 0, 0, 0.08);
  --md-shadow-1: 0 4px 20px rgba(0, 0, 0, 0.08);
  --md-shadow-2: 0 12px 36px rgba(0, 0, 0, 0.12);
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100dvh;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-family);
  overflow: hidden;
  position: fixed;
}

/* ==========================================================================
   APP CONTAINER & LAYOUT (Mobile-First Desktop Frame)
   ========================================================================== */

#app-root {
  width: 100%;
  height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at 50% 20%, rgba(140, 98, 255, 0.12), transparent 70%),
              radial-gradient(circle at 80% 80%, rgba(0, 229, 255, 0.08), transparent 60%),
              var(--md-sys-color-background);
}

.app-container {
  width: 100%;
  max-width: 480px;
  height: 100dvh;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background-color: transparent;
}

@media (min-width: 520px) {
  .app-container {
    height: 94dvh;
    max-height: 900px;
    border-radius: var(--radius-lg);
    border: var(--glass-border);
    box-shadow: var(--md-shadow-2);
    background: var(--md-sys-color-surface-glass);
    backdrop-filter: var(--glass-backdrop);
  }
}

/* Header bar */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  z-index: 10;
  position: relative;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-badge {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--md-sys-color-primary), #512da8);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 14px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(140, 98, 255, 0.4);
}

.brand-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--md-sys-color-on-surface), var(--md-sys-color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-actions {
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: var(--glass-border);
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 18px;
}

.icon-btn:active {
  transform: scale(0.92);
  background: var(--md-sys-color-primary-container);
}

/* ==========================================================================
   OFFLINE BANNER & STATUS
   ========================================================================== */

.offline-banner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: var(--md-sys-color-error);
  color: #ffffff;
  text-align: center;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  z-index: 1000;
  transform: translateY(-100%);
  transition: transform 0.3s cubic-bezier(0.1, 0.9, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.offline-banner.visible {
  transform: translateY(0);
}

/* ==========================================================================
   SPLASH SCREEN
   ========================================================================== */

#splash-screen {
  position: absolute;
  inset: 0;
  z-index: 9999;
  background: var(--md-sys-color-background);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.splash-logo-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
}

.splash-glow-ring {
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(140, 98, 255, 0.4) 0%, rgba(0, 229, 255, 0.1) 60%, transparent 80%);
  animation: pulseGlow 2s infinite ease-in-out;
}

.splash-logo-badge {
  width: 110px;
  height: 110px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--md-sys-color-primary), #4527a0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--md-shadow-glow);
  z-index: 2;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.splash-logo-text {
  font-size: 32px;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -1px;
}

.splash-sub-tag {
  font-size: 11px;
  font-weight: 800;
  color: var(--md-sys-color-secondary);
  letter-spacing: 2px;
  margin-top: -2px;
}

.splash-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.splash-status {
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 24px;
}

@keyframes pulseGlow {
  0% { transform: scale(0.95); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 0.9; }
  100% { transform: scale(0.95); opacity: 0.6; }
}

/* ==========================================================================
   VIEWS & ANIMATED TRANSITIONS
   ========================================================================== */

.views-wrapper {
  flex: 1;
  position: relative;
  width: 100%;
  overflow: hidden;
}

.view {
  position: absolute;
  inset: 0;
  padding: 16px 16px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  overflow-x: hidden;
  opacity: 0;
  transform: translateY(24px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.view.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  z-index: 2;
}

.view.exit {
  opacity: 0;
  transform: translateY(-20px) scale(0.98);
  pointer-events: none;
  z-index: 1;
}

/* Scrollbar styling */
.view::-webkit-scrollbar {
  width: 4px;
}
.view::-webkit-scrollbar-thumb {
  background: var(--md-sys-color-outline);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   CARDS & MATERIAL DESIGN COMPONENTS
   ========================================================================== */

.card {
  width: 100%;
  max-width: 440px;
  background: var(--md-sys-color-surface-glass);
  backdrop-filter: var(--glass-backdrop);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  box-shadow: var(--md-shadow-1);
  margin-bottom: 20px;
  position: relative;
}

.card-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Input Fields */
.input-group {
  margin-bottom: 16px;
  width: 100%;
  text-align: left;
}

.input-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--md-sys-color-secondary);
  margin-left: 4px;
  margin-bottom: 6px;
}

.input-field, .select-field {
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 600;
  outline: none;
  transition: all 0.25s ease;
  user-select: text;
}

.input-field:focus, .select-field:focus {
  border-color: var(--md-sys-color-primary);
  background: var(--md-sys-color-surface);
  box-shadow: 0 0 0 4px var(--md-sys-color-primary-container);
}

.select-field option {
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

/* Buttons */
.btn {
  width: 100%;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: var(--md-shadow-1);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--md-sys-color-primary), #673ab7);
  color: var(--md-sys-color-on-primary);
}

.btn-secondary {
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  border: var(--glass-border);
}

.btn-secondary:active {
  background: var(--md-sys-color-primary-container);
}

.chip-btn {
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  border: var(--glass-border);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.chip-btn:active {
  transform: scale(0.95);
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-error);
}

.btn-stop {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #ff5252, #d32f2f);
  color: #ffffff;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 1px;
  border: 6px solid rgba(255, 255, 255, 0.2);
  margin: 20px auto 10px;
  box-shadow: var(--md-shadow-stop);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-stop:active {
  transform: scale(0.92);
  box-shadow: 0 4px 15px rgba(255, 82, 82, 0.6);
}

/* ==========================================================================
   GAMEPLAY UI & TIMER
   ========================================================================== */

.game-header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 12px;
}

.letter-display {
  font-size: 100px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--md-sys-color-secondary), var(--md-sys-color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 4px 0;
  text-shadow: 0 10px 30px rgba(0, 229, 255, 0.2);
}

/* Timer Bar */
.timer-container {
  width: 100%;
  margin-bottom: 16px;
}

.timer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 700;
}

.timer-label {
  color: var(--md-sys-color-on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timer-value {
  color: var(--md-sys-color-error);
  font-weight: 800;
}

.timer-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  border: var(--glass-border);
}

.timer-bar {
  height: 100%;
  width: 100%;
  background: var(--md-sys-color-success);
  border-radius: var(--radius-full);
  transition: width 1s linear, background-color 0.5s ease;
}

.timer-bar.warning {
  background: var(--md-sys-color-warning);
}

.timer-bar.critical {
  background: var(--md-sys-color-error);
  animation: timerBlink 0.6s infinite alternate;
}

@keyframes timerBlink {
  from { opacity: 1; }
  to { opacity: 0.5; }
}

/* Categories List */
.category-card {
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 12px;
  border: var(--glass-border);
  text-align: left;
}

.category-card .input-field {
  margin-top: 6px;
  background: var(--md-sys-color-surface);
  text-transform: uppercase;
}

/* ==========================================================================
   ROOM & LOBBY UI
   ========================================================================== */

.host-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.host-options-grid.hidden {
  display: none !important;
}

.room-code-box {
  background: var(--md-sys-color-secondary-container);
  border: 1px dashed rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  text-align: center;
  margin: 12px 0;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.room-code-box:active {
  transform: scale(0.98);
}

.room-code-label {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--md-sys-color-secondary);
}

.room-code-value {
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 2.5px;
  color: var(--md-sys-color-on-surface);
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.copy-badge {
  font-size: 11px;
  background: rgba(0, 229, 255, 0.2);
  color: var(--md-sys-color-secondary);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

/* Player List */
.player-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0 16px;
}

.player-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-xs);
  border: var(--glass-border);
}

.player-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.player-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
}

.player-name {
  font-weight: 700;
  font-size: 15px;
}

.host-badge {
  font-size: 11px;
  font-weight: 800;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   RESULTS TABLE & MODERATION
   ========================================================================== */

.results-table-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  background: var(--md-sys-color-surface-variant);
  border: var(--glass-border);
  margin-bottom: 20px;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 440px;
  text-align: left;
}

.results-table th {
  background: rgba(0, 0, 0, 0.25);
  padding: 12px 10px;
  font-size: 11px;
  font-weight: 800;
  color: var(--md-sys-color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.results-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--md-sys-color-outline);
  font-size: 13px;
  font-weight: 600;
  position: relative;
  vertical-align: middle;
}

/* Host clickable invalidation cell */
.word-cell {
  cursor: pointer;
  transition: background 0.2s ease;
  user-select: none;
}

.word-cell:hover {
  background: rgba(255, 255, 255, 0.05);
}

.invalid-ans {
  text-decoration: line-through;
  color: var(--md-sys-color-error);
  opacity: 0.5;
}

.pts-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 900;
  color: var(--md-sys-color-success);
  margin-left: 4px;
}

.pts-badge.zero {
  color: var(--md-sys-color-on-surface-variant);
}

/* ==========================================================================
   TOASTS & MODALS
   ========================================================================== */

#toast {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border: var(--glass-border);
  box-shadow: var(--md-shadow-2);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.1, 0.9, 0.2, 1);
  pointer-events: none;
  max-width: 90%;
  text-align: center;
}

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

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 5000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 380px;
  background: var(--md-sys-color-surface);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--md-shadow-2);
}

/* Spinner */
.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 0.8s infinite linear;
  display: inline-block;
}

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

.hidden {
  display: none !important;
}