/* ═══════════════════════════════════════════════════════════════
   WhiteBoard Live — Main Design System
   Dark Glassmorphism Theme with Arabic RTL Support
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@300;400;500;700;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ─── CSS Custom Properties ────────────────────────────────────── */
:root {
  /* Color Palette */
  --primary:       hsl(250, 85%, 65%);
  --primary-dark:  hsl(250, 85%, 50%);
  --primary-glow:  hsl(250, 100%, 75%);
  --secondary:     hsl(190, 80%, 55%);
  --accent:        hsl(330, 80%, 65%);
  --success:       hsl(145, 65%, 50%);
  --warning:       hsl(40, 90%, 60%);
  --danger:        hsl(0, 75%, 60%);

  /* Background */
  --bg-deep:       hsl(225, 30%, 6%);
  --bg-dark:       hsl(225, 25%, 10%);
  --bg-card:       hsl(225, 20%, 14%);
  --bg-glass:      hsla(225, 30%, 18%, 0.6);
  --bg-glass-light:hsla(255, 30%, 25%, 0.4);

  /* Text */
  --text-primary:  hsl(220, 20%, 95%);
  --text-secondary:hsl(220, 15%, 70%);
  --text-muted:    hsl(220, 10%, 50%);

  /* Borders */
  --border:        hsla(250, 50%, 70%, 0.15);
  --border-bright: hsla(250, 50%, 80%, 0.35);

  /* Shadows */
  --shadow-sm:     0 2px 10px hsla(250,80%,30%,0.2);
  --shadow-md:     0 8px 32px hsla(250,80%,30%,0.3);
  --shadow-lg:     0 16px 64px hsla(250,80%,30%,0.4);
  --shadow-glow:   0 0 30px hsla(250,85%,65%,0.3);
  --shadow-glow2:  0 0 60px hsla(250,85%,65%,0.15);

  /* Gradients */
  --grad-primary:  linear-gradient(135deg, hsl(250,85%,60%), hsl(190,80%,50%));
  --grad-hero:     linear-gradient(135deg, hsl(250,85%,20%) 0%, hsl(225,30%,6%) 50%, hsl(190,80%,15%) 100%);
  --grad-card:     linear-gradient(135deg, hsla(255,30%,20%,0.8), hsla(225,25%,15%,0.6));
  --grad-accent:   linear-gradient(135deg, hsl(330,80%,60%), hsl(250,85%,60%));

  /* Backdrop */
  --glass-blur:    blur(20px);
  --glass-blur-sm: blur(10px);

  /* Typography */
  --font-ar: 'Tajawal', sans-serif;
  --font-en: 'Inter', sans-serif;
  --font-size-xs:  0.75rem;
  --font-size-sm:  0.875rem;
  --font-size-md:  1rem;
  --font-size-lg:  1.125rem;
  --font-size-xl:  1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-sm:  0.375rem;
  --radius-md:  0.75rem;
  --radius-lg:  1.25rem;
  --radius-xl:  2rem;
  --radius-full:9999px;

  /* Transitions */
  --trans-fast:  150ms ease;
  --trans-base:  250ms ease;
  --trans-slow:  400ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-spring:500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  direction: rtl;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-ar);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, hsla(250,85%,40%,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, hsla(190,80%,40%,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, hsla(330,80%,30%,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ─── Typography ───────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--trans-fast);
}
a:hover { color: var(--primary-glow); }

/* ─── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb {
  background: var(--primary-dark);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ─── Navbar ───────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  background: hsla(225, 30%, 8%, 0.85);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 900;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--grad-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-glow);
}

.navbar-actions {
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.navbar-actions [dir="ltr"] .navbar-actions,
html[dir="rtl"] .navbar-actions {
  margin-right: auto;
  margin-left: 0;
}

/* ─── Glass Cards ──────────────────────────────────────────────── */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--trans-slow), box-shadow var(--trans-slow), border-color var(--trans-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-bright);
}

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-ar);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans-slow);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: hsla(255,100%,100%,0.1);
  opacity: 0;
  transition: opacity var(--trans-fast);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 4px 20px hsla(250,85%,50%,0.4);
}
.btn-primary:hover {
  box-shadow: 0 6px 28px hsla(250,85%,50%,0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
  backdrop-filter: var(--glass-blur-sm);
}
.btn-secondary:hover {
  border-color: var(--border-bright);
  background: var(--bg-glass-light);
}

.btn-danger {
  background: linear-gradient(135deg, hsl(0,75%,55%), hsl(330,75%,50%));
  color: #fff;
  box-shadow: 0 4px 20px hsla(0,75%,50%,0.4);
}

.btn-success {
  background: linear-gradient(135deg, hsl(145,65%,45%), hsl(170,65%,45%));
  color: #fff;
  box-shadow: 0 4px 20px hsla(145,65%,45%,0.4);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ─── Form Elements ────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  padding: var(--space-3) var(--space-4);
  background: hsla(225,25%,12%,0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-ar);
  font-size: var(--font-size-md);
  transition: border-color var(--trans-base), box-shadow var(--trans-base);
  outline: none;
  width: 100%;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px hsla(250,85%,65%,0.2);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ─── Badges ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: hsla(250,85%,65%,0.2);
  color: var(--primary-glow);
  border: 1px solid hsla(250,85%,65%,0.3);
}

.badge-success {
  background: hsla(145,65%,50%,0.2);
  color: hsl(145,65%,60%);
  border: 1px solid hsla(145,65%,50%,0.3);
}

.badge-warning {
  background: hsla(40,90%,60%,0.2);
  color: hsl(40,90%,70%);
  border: 1px solid hsla(40,90%,60%,0.3);
}

/* ─── Modals ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: hsla(225,30%,4%,0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--trans-slow), visibility var(--trans-slow);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: scale(0.9) translateY(20px);
  transition: transform var(--trans-spring);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

/* ─── Toast Notifications ──────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

[dir="rtl"] #toast-container {
  left: auto;
  right: var(--space-6);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  max-width: 320px;
  pointer-events: auto;
  animation: toastIn 0.4s var(--trans-spring) forwards;
}

.toast.toast-out {
  animation: toastOut 0.3s ease forwards;
}

.toast-success { border-color: hsla(145,65%,50%,0.5); }
.toast-success .toast-icon { color: hsl(145,65%,55%); }
.toast-error   { border-color: hsla(0,75%,60%,0.5); }
.toast-error   .toast-icon { color: hsl(0,75%,65%); }
.toast-info    { border-color: hsla(250,85%,65%,0.5); }
.toast-info    .toast-icon { color: var(--primary-glow); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}
[dir="rtl"] @keyframes toastIn {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  to { opacity: 0; transform: translateX(30px); }
}

/* ─── Player Slots ─────────────────────────────────────────────── */
.player-slots {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
}

.player-slot {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  transition: all var(--trans-base);
  cursor: pointer;
}

.player-slot.occupied {
  border-color: hsla(145,65%,50%,0.5);
  background: hsla(145,65%,50%,0.1);
}

.player-slot.mine {
  border-color: var(--primary);
  background: hsla(250,85%,65%,0.15);
  box-shadow: 0 0 12px hsla(250,85%,65%,0.2);
}

.player-slot .slot-avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.slot-p1 .slot-avatar { background: hsl(250,85%,55%); }
.slot-p2 .slot-avatar { background: hsl(0,75%,55%); }

/* ─── Room Code ────────────────────────────────────────────────── */
.room-code {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: hsla(250,85%,65%,0.1);
  border: 1px solid hsla(250,85%,65%,0.2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--primary-glow);
  cursor: pointer;
  transition: all var(--trans-base);
  font-family: var(--font-en);
}

.room-code:hover {
  background: hsla(250,85%,65%,0.2);
  box-shadow: 0 0 12px hsla(250,85%,65%,0.2);
}

/* ─── Pulse Animation ──────────────────────────────────────────── */
.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ─── Glow Effects ─────────────────────────────────────────────── */
.glow-text {
  text-shadow: 0 0 20px currentColor;
}

.glow-border {
  box-shadow: 0 0 15px hsla(250,85%,65%,0.3);
}

/* ─── Divider ──────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: var(--space-6) 0;
}

/* ─── Loading Spinner ──────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ─── Sync Indicator ───────────────────────────────────────────── */
.sync-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: syncPulse 2s infinite;
}

.sync-dot.offline {
  background: var(--danger);
  box-shadow: 0 0 6px var(--danger);
  animation: none;
}

@keyframes syncPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.8); }
}

/* ─── Animated Background Particles ───────────────────────────── */
.particle-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--primary-glow);
  opacity: 0;
  animation: floatUp linear infinite;
}

@keyframes floatUp {
  0%   { opacity: 0;   transform: translateY(100vh) scale(0); }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { opacity: 0;   transform: translateY(-20px) scale(1.5); }
}

/* ─── Content Container ────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.page-content {
  padding-top: 80px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ─── Section Titles ───────────────────────────────────────────── */
.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  margin-bottom: var(--space-2);
}

.section-title span {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-10);
}

/* ─── Grid Layouts ─────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }

/* ─── Flex Utilities ───────────────────────────────────────────── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2        { gap: var(--space-2); }
.gap-3        { gap: var(--space-3); }
.gap-4        { gap: var(--space-4); }
.gap-6        { gap: var(--space-6); }
.flex-wrap    { flex-wrap: wrap; }