/* ===================================================================
   SosTeach — Apple-Grade Design System with Liquid Glass
   Ispirato a macOS / iPadOS / iOS 26
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ===================================================================
   1. DESIGN TOKENS
   =================================================================== */
:root {
  --primary:          #007AFF;
  --primary-light:    rgba(0, 122, 255, 0.12);
  --primary-dark:     #0055CC;
  --danger:           #FF3B30;
  --success:          #34C759;
  --warning:          #FF9F0A;

  --gray-50:   #F5F5F7;
  --gray-100:  #EBEBED;
  --gray-200:  #D8D8DC;
  --gray-300:  #AEAEB2;
  --gray-400:  #8E8E93;
  --gray-600:  #48484A;
  --gray-800:  #2C2C2E;
  --gray-900:  #1C1C1E;

  --text-primary:   #1D1D1F;
  --text-secondary: #3A3A3C;
  --text-muted:     #6E6E73;
  --text-subtle:    #AEAEB2;

  /* LIQUID GLASS */
  --glass-bg:      rgba(255, 255, 255, 0.72);
  --glass-border:  rgba(255, 255, 255, 0.65);
  --glass-shadow:
    0 2px 4px   rgba(0,0,0,0.04),
    0 8px 24px  rgba(0,0,0,0.07),
    0 24px 64px rgba(0,0,0,0.05);
  --glass-inset:
    inset 0  1px 0 rgba(255,255,255,0.90),
    inset 0 -1px 0 rgba(0,0,0,0.04);

  --blur-xs:  blur(8px)  saturate(160%);
  --blur-sm:  blur(16px) saturate(180%);
  --blur-md:  blur(28px) saturate(200%) brightness(1.04);
  --blur-lg:  blur(40px) saturate(220%) brightness(1.06);

  --sidebar-bg:     rgba(248,248,250,0.84);
  --sidebar-width:  260px;
  --sidebar-border: rgba(0,0,0,0.07);

  --r-xs:   6px;
  --r-sm:   10px;
  --r-md:   14px;
  --r-lg:   20px;
  --r-xl:   28px;
  --r-pill: 100px;

  --ease:       cubic-bezier(0.25,0.46,0.45,0.94);
  --spring:     cubic-bezier(0.34,1.26,0.64,1);
  --dur-fast:   150ms;
  --dur-base:   220ms;
  --dur-slow:   380ms;
}

/* ===================================================================
   2. RESET & GLOBALS
   =================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Mesh gradient — fixed behind everything, never intercepts clicks */
body:not(.login-page)::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 15% 10%,  rgba(0,122,255,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 85%, rgba(175,82,222,0.04) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 50% 50%,  rgba(48,209,88,0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ===================================================================
   3. APP LAYOUT
   =================================================================== */
.app-wrapper {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.main-content {
  flex: 1;
  min-width: 0;
  padding: 40px 48px;
}
@media (max-width: 1024px) { .main-content { padding: 32px 28px; } }
@media (max-width: 768px)  { .main-content { padding: 24px 18px; } }

/* ===================================================================
   4. SIDEBAR
   =================================================================== */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  height: 100vh;
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  padding: 32px 16px;
  background: var(--sidebar-bg);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: 1px 0 0 rgba(255,255,255,0.6), 4px 0 20px rgba(0,0,0,0.04);
  flex-shrink: 0;
  z-index: 10;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: rgba(255,255,255,0.95);
  pointer-events: none;
}

.sidebar-header { padding: 0 10px; margin-bottom: 36px; }

.app-logo {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  white-space: nowrap;
}
.app-logo span { color: var(--primary); font-weight: 600; }

.sidebar-nav { display: flex; flex-direction: column; gap: 3px; flex: 1; }

.nav-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
  padding: 0 12px;
  margin: 16px 0 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--dur-base) var(--ease);
  position: relative;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}
.nav-link:hover { background: rgba(0,0,0,0.04); color: var(--text-primary); }
.nav-link.active {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-xs);
  -webkit-backdrop-filter: var(--blur-xs);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--glass-inset), 0 2px 8px rgba(0,0,0,0.06);
  border: 1px solid var(--glass-border);
}

.nav-icon { width: 20px; text-align: center; font-size: 1rem; flex-shrink: 0; }

.nav-link.danger { color: var(--danger); }
.nav-link.danger:hover { background: rgba(255,59,48,0.06); }

.nav-sep { height: 1px; background: var(--gray-100); margin: 10px 12px; }

.sidebar-footer { margin-top: auto; padding-top: 20px; }

.profile-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--glass-bg);
  backdrop-filter: var(--blur-xs);
  -webkit-backdrop-filter: var(--blur-xs);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset);
}

.profile-avatar {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.profile-name { font-size: 0.85rem; font-weight: 600; line-height: 1.3; }
.profile-role { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }

/* ===================================================================
   5. GLASS CARD
   =================================================================== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-radius: var(--r-xl);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-inset);
  padding: 28px 32px;
  position: relative;
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.glass-card:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 8px rgba(0,0,0,0.04),
    0 16px 40px rgba(0,0,0,0.09),
    0 32px 80px rgba(0,0,0,0.05),
    var(--glass-inset);
}
.glass-card.compact { padding: 20px 24px; border-radius: var(--r-lg); }

.stat-card { display: flex; flex-direction: column; gap: 4px; }
.stat-icon { font-size: 1.6rem; margin-bottom: 10px; display: block; }
.stat-value { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.04em; color: var(--primary); line-height: 1; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

/* ===================================================================
   6. BUTTONS
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--r-pill);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--dur-base) var(--ease);
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,122,255,0.28), inset 0 1px 0 rgba(255,255,255,0.20);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,122,255,0.34), inset 0 1px 0 rgba(255,255,255,0.20);
  color: #fff;
}
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-xs);
  -webkit-backdrop-filter: var(--blur-xs);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset);
}
.btn-secondary:hover { background: rgba(255,255,255,0.92); color: var(--text-primary); }

.btn-danger {
  background: rgba(255,59,48,0.10);
  color: var(--danger);
  border: 1px solid rgba(255,59,48,0.18);
}
.btn-danger:hover { background: rgba(255,59,48,0.17); }

.btn-sm { padding: 7px 16px; font-size: 0.82rem; }

/* ===================================================================
   7. FORM ELEMENTS
   =================================================================== */
.field-group { margin-bottom: 22px; }

.field-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.field-input,
.field-select,
.field-textarea {
  width: 100%;
  padding: 13px 18px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(255,255,255,0.80);
  border: 1px solid var(--gray-200);
  border-radius: var(--r-md);
  outline: none;
  transition: all var(--dur-fast) var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.field-input:focus,
.field-select:focus,
.field-textarea:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,122,255,0.13);
}
.field-input::placeholder,
.field-textarea::placeholder { color: var(--text-subtle); }
.field-textarea { resize: vertical; }

.file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 30px;
  border: 1.5px dashed var(--gray-300);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,0.40);
  cursor: pointer;
  transition: all var(--dur-base) var(--ease);
  text-align: center;
}
.file-drop:hover { border-color: var(--primary); background: var(--primary-light); }

/* ===================================================================
   8. TYPOGRAPHY
   =================================================================== */
.page-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--text-primary);
  margin: 0 0 6px;
}
.page-subtitle { font-size: 0.95rem; color: var(--text-muted); margin: 0 0 36px; }
.section-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin: 0 0 18px;
}

h1, h2, h3, h4 { margin-top: 0; letter-spacing: -0.02em; }
.text-muted  { color: var(--text-muted); }
.text-center { text-align: center; }

/* ===================================================================
   9. GRID HELPERS
   =================================================================== */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.grid-2col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: flex-start;
}
@media (max-width: 960px) { .grid-2col { grid-template-columns: 1fr; } }
.stack { display: flex; flex-direction: column; gap: 20px; }

/* ===================================================================
   10. BADGES
   =================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-gray    { background: var(--gray-100); color: var(--gray-600); }
.badge-success { background: rgba(52,199,89,0.12); color: var(--success); }
.badge-danger  { background: rgba(255,59,48,0.10); color: var(--danger); }

/* ===================================================================
   11. TABLE
   =================================================================== */
.ios-table { width: 100%; border-collapse: collapse; }
.ios-table th {
  padding: 12px 20px;
  text-align: left;
  font-size: 0.70rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--gray-100);
  white-space: nowrap;
}
.ios-table td {
  padding: 16px 20px;
  vertical-align: middle;
  border-bottom: 1px solid rgba(0,0,0,0.04);
  font-size: 0.92rem;
}
.ios-table tbody tr:last-child td { border-bottom: none; }
.ios-table tbody tr:hover td { background: rgba(0,0,0,0.015); }

.color-swatch {
  width: 22px; height: 22px;
  border-radius: 6px;
  display: inline-block;
  vertical-align: middle;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

/* ===================================================================
   12. ALERTS
   =================================================================== */
.alert {
  padding: 14px 18px;
  border-radius: var(--r-md);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.alert-success { background: rgba(52,199,89,0.10); color: #1a6b31; border: 1px solid rgba(52,199,89,0.25); }
.alert-error   { background: rgba(255,59,48,0.08); color: #b00; border: 1px solid rgba(255,59,48,0.22); }

/* ===================================================================
   13. GAME CARD
   =================================================================== */
.game-card { display: flex; flex-direction: column; justify-content: space-between; }
.game-card-body { flex: 1; }
.game-card h3,
.game-card-h3 { font-size: 1.05rem; font-weight: 700; margin: 10px 0 6px; color: var(--text-primary); }
.game-card-meta { font-size: 0.8rem; color: var(--text-muted); }
.game-card-footer { margin-top: 20px; }

/* ===================================================================
   14. LOGIN PAGE — Fullscreen centered
   =================================================================== */

/* Login background: gradient default + optional background-image set inline */
body.login-page {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  background:
    radial-gradient(ellipse 100% 80% at 20%   0%, rgba(0,122,255,0.18) 0%, transparent 55%),
    radial-gradient(ellipse 80%  70% at 80% 100%, rgba(175,82,222,0.14) 0%, transparent 50%),
    radial-gradient(ellipse 60%  60% at 50%  50%, rgba(48,209,88,0.06)  0%, transparent 50%),
    #F0F2F7;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

/* Overlay: blurs the background image / gradient behind the card */
.login-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 30, 0.22);
  backdrop-filter: blur(4px) saturate(150%);
  -webkit-backdrop-filter: blur(4px) saturate(150%);
  z-index: 1;
  pointer-events: none;
}

/* Glass card */
.login-card {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 420px;
  padding: 52px 44px;
  background: rgba(255,255,255,0.84);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-radius: var(--r-xl);
  border: 1px solid rgba(255,255,255,0.78);
  box-shadow: var(--glass-shadow), var(--glass-inset);
}

/* Logo */
.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}
.login-logo-icon {
  width: 80px; height: 80px;
  border-radius: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 4px 24px rgba(0,0,0,0.20), inset 0 1px 0 rgba(255,255,255,0.25);
}
.login-logo img {
  height: 80px;
  border-radius: 22px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.18);
}

.login-title {
  font-size: 1.7rem;
  font-weight: 800;
  text-align: center;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin: 0 0 6px;
}
.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 32px;
}

/* Full-width submit inside login-card */
.login-card .btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  border-radius: var(--r-md);
}

.login-footer {
  text-align: center;
  margin-top: 28px;
  font-size: 0.78rem;
  color: var(--text-subtle);
}

/* ===================================================================
   15. MISC
   =================================================================== */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gray-200), transparent);
  margin: 32px 0;
}

::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 3px; }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===================================================================
   16. RESPONSIVE
   =================================================================== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    z-index: 200;
    transition: transform var(--dur-slow) var(--ease);
  }
  .sidebar.open { transform: translateX(0); }
  .grid-stats { grid-template-columns: 1fr 1fr; }
  .grid-cards { grid-template-columns: 1fr; }
  .login-card { padding: 40px 28px; }
}
@media (max-width: 480px) {
  .grid-stats { grid-template-columns: 1fr; }
  .login-card { padding: 32px 20px; }
}