/* =====================================================
   iOS-STYLE "DROPLET" DESIGN SYSTEM
   ReadyForExam - Liquid glass, soft shadows, pill buttons
   ===================================================== */

:root {
  /* iOS palette */
  --ios-bg-1: #f2f4f8;
  --ios-bg-2: #e8ecf3;
  --ios-card: rgba(255, 255, 255, 0.72);
  --ios-card-border: rgba(255, 255, 255, 0.55);
  --ios-stroke: rgba(60, 60, 67, 0.12);
  --ios-text: #1c1c1e;
  --ios-text-2: #6e6e73;
  --ios-blue: #007aff;
  --ios-indigo: #5856d6;
  --ios-purple: #af52de;
  --ios-pink: #ff2d55;
  --ios-orange: #ff9500;
  --ios-green: #34c759;
  --ios-red: #ff3b30;
  --ios-yellow: #ffcc00;
  --ios-grad-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --ios-grad-2: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  --ios-grad-3: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
  --ios-grad-warm: linear-gradient(135deg, #ff6a00 0%, #ee0979 100%);
  --ios-grad-cool: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);

  --ios-radius-sm: 12px;
  --ios-radius:    18px;
  --ios-radius-lg: 28px;
  --ios-radius-xl: 36px;

  --ios-shadow-sm: 0 4px 14px rgba(20, 30, 60, 0.06);
  --ios-shadow:    0 10px 30px rgba(20, 30, 60, 0.08);
  --ios-shadow-lg: 0 20px 50px rgba(20, 30, 60, 0.12);
  --ios-shadow-glow: 0 8px 28px rgba(0, 122, 255, 0.25);
}

/* ---------- Base ---------- */
body.ios {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--ios-text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #d8e0ff 0%, transparent 60%),
    radial-gradient(1000px 600px at 110% 10%, #ffd8ec 0%, transparent 60%),
    radial-gradient(900px 600px at 50% 110%, #d2f5e3 0%, transparent 60%),
    var(--ios-bg-1);
  min-height: 100vh;
}

/* Sayohat fonidagi yumshoq tomchilar (drift bubbles) */
body.ios::before,
body.ios::after {
  content: "";
  position: fixed;
  z-index: 0;
  width: 480px; height: 480px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .55;
  pointer-events: none;
}
body.ios::before {
  background: radial-gradient(circle at 30% 30%, #b9c8ff, transparent 70%);
  top: -120px; left: -120px;
  animation: ios-float 18s ease-in-out infinite;
}
body.ios::after {
  background: radial-gradient(circle at 70% 70%, #ffc0e0, transparent 70%);
  bottom: -160px; right: -120px;
  animation: ios-float 22s ease-in-out infinite reverse;
}
@keyframes ios-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(40px, 30px) scale(1.08); }
}

/* ---------- Glass card ---------- */
.ios-card {
  position: relative;
  background: var(--ios-card);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--ios-card-border);
  border-radius: var(--ios-radius-lg);
  box-shadow: var(--ios-shadow);
  padding: 28px;
  z-index: 1;
}
.ios-card.tight  { padding: 18px; border-radius: var(--ios-radius); }
.ios-card.hero   { padding: 36px; border-radius: var(--ios-radius-xl); }
.ios-card-title  { font-weight: 700; font-size: 1.1rem; margin: 0 0 14px; letter-spacing: -0.01em; }

/* ---------- Sidebar (admin) ---------- */
.ios-sidebar {
  background: var(--ios-card);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border-right: 1px solid var(--ios-stroke);
  min-height: 100vh;
  padding: 22px 14px;
  position: sticky; top: 0;
  z-index: 2;
}
.ios-sidebar .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.15rem;
  background: var(--ios-grad-warm);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  padding: 6px 12px 18px;
  text-decoration: none;
}
.ios-sidebar .nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; margin: 4px 0;
  border-radius: 14px;
  color: var(--ios-text); font-weight: 500;
  text-decoration: none;
  transition: all .25s ease;
}
.ios-sidebar .nav-link i { font-size: 1.1rem; color: var(--ios-text-2); }
.ios-sidebar .nav-link:hover {
  background: rgba(255,255,255,0.7);
  transform: translateX(2px);
}
.ios-sidebar .nav-link.active {
  background: var(--ios-grad-warm);
  color: #fff;
  box-shadow: 0 8px 22px rgba(238, 9, 121, 0.28);
}
.ios-sidebar .nav-link.active i { color: #fff; }

/* ---------- Buttons (pill / capsule) ---------- */
.ios-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px;
  border: none; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .25s ease, filter .2s ease;
  text-decoration: none;
  line-height: 1.1;
}
.ios-btn:active { transform: scale(0.97); }
.ios-btn-primary {
  background: var(--ios-grad-warm); color: #fff;
  box-shadow: 0 8px 22px rgba(238, 9, 121, 0.28);
}
.ios-btn-primary:hover { filter: brightness(1.05); box-shadow: 0 12px 28px rgba(238, 9, 121, 0.38); color: #fff; }
.ios-btn-blue   { background: var(--ios-grad-cool); color: #fff; box-shadow: 0 8px 22px rgba(0,114,255,.28); }
.ios-btn-green  { background: linear-gradient(135deg,#34c759,#1ea64e); color:#fff; box-shadow:0 8px 22px rgba(52,199,89,.28); }
.ios-btn-red    { background: linear-gradient(135deg,#ff5e62,#ff3b30); color:#fff; box-shadow:0 8px 22px rgba(255,59,48,.28); }
.ios-btn-ghost  { background: rgba(255,255,255,.7); color: var(--ios-text); border:1px solid var(--ios-stroke); }
.ios-btn-ghost:hover { background: #fff; }
.ios-btn-sm     { padding: 7px 14px; font-size: 0.85rem; }
.ios-btn-lg     { padding: 14px 28px; font-size: 1.05rem; }
.ios-btn[disabled],
.ios-btn:disabled { opacity:.55; cursor:not-allowed; transform:none; }

/* ---------- Form controls ---------- */
.ios-input,
.ios-textarea,
.ios-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--ios-stroke);
  background: rgba(255,255,255,.9);
  border-radius: 14px;
  font-size: 1rem; color: var(--ios-text);
  transition: border-color .2s, box-shadow .2s;
  font-family: inherit;
}
.ios-input:focus,
.ios-textarea:focus,
.ios-select:focus {
  outline: none;
  border-color: rgba(0,122,255,.55);
  box-shadow: 0 0 0 4px rgba(0,122,255,.12);
  background: #fff;
}
.ios-textarea { min-height: 110px; resize: vertical; }
.ios-label { display:block; font-weight:600; font-size:.88rem; color:var(--ios-text-2); margin-bottom:8px; letter-spacing:.01em; }

/* iOS toggle switch */
.ios-switch {
  position: relative; display: inline-block; width: 50px; height: 30px;
}
.ios-switch input { display: none; }
.ios-switch .slider {
  position: absolute; cursor: pointer; inset: 0;
  background: #d1d1d6; border-radius: 999px; transition: .25s;
}
.ios-switch .slider::before {
  content: ""; position: absolute; height: 26px; width: 26px;
  left: 2px; top: 2px; background: white; border-radius: 50%;
  transition: .25s; box-shadow: 0 2px 6px rgba(0,0,0,.18);
}
.ios-switch input:checked + .slider { background: var(--ios-green); }
.ios-switch input:checked + .slider::before { transform: translateX(20px); }

/* ---------- Drop zone (file upload) ---------- */
.ios-dropzone {
  border: 2px dashed rgba(0,122,255,.35);
  background: rgba(0,122,255,.04);
  border-radius: var(--ios-radius);
  padding: 36px 20px;
  text-align: center;
  transition: all .25s ease;
  cursor: pointer;
}
.ios-dropzone:hover,
.ios-dropzone.dragover {
  background: rgba(0,122,255,.08);
  border-color: var(--ios-blue);
  transform: translateY(-2px);
  box-shadow: var(--ios-shadow-glow);
}
.ios-dropzone i { font-size: 42px; color: var(--ios-blue); }
.ios-file-list { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.ios-file-item {
  display:flex; align-items:center; gap:10px;
  padding: 10px 14px; border-radius: 14px;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--ios-stroke);
  font-size: .9rem;
}
.ios-file-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ios-file-item .size { color: var(--ios-text-2); font-size:.8rem; }
.ios-file-item .remove { color: var(--ios-red); cursor: pointer; background:none; border:none; }

/* ---------- Stat cards ---------- */
.ios-stat {
  display:flex; align-items:center; gap:16px;
  padding: 22px;
  background: var(--ios-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--ios-card-border);
  border-radius: var(--ios-radius);
  box-shadow: var(--ios-shadow-sm);
  transition: transform .2s;
}
.ios-stat:hover { transform: translateY(-3px); box-shadow: var(--ios-shadow); }
.ios-stat .icon {
  width: 54px; height: 54px; border-radius: 16px;
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size: 1.4rem;
}
.ios-stat .number { font-size: 1.8rem; font-weight: 700; line-height: 1.1; letter-spacing: -.01em; }
.ios-stat .label  { font-size: .85rem; color: var(--ios-text-2); }

/* ---------- Pills / badges ---------- */
.ios-pill {
  display:inline-flex; align-items:center; gap:6px;
  padding: 4px 12px; border-radius: 999px;
  font-size:.78rem; font-weight: 600;
  background: rgba(0,122,255,.1); color: var(--ios-blue);
}
.ios-pill.green { background: rgba(52,199,89,.12); color: #1ea64e; }
.ios-pill.red   { background: rgba(255,59,48,.1);  color: var(--ios-red); }
.ios-pill.gray  { background: rgba(60,60,67,.08);  color: var(--ios-text-2); }
.ios-pill.warm  { background: rgba(255,149,0,.12); color: #d97706; }

/* ---------- Progress ---------- */
.ios-progress {
  width: 100%; height: 10px; border-radius: 999px;
  background: rgba(60,60,67,.08); overflow: hidden;
}
.ios-progress-bar {
  height: 100%;
  background: var(--ios-grad-warm);
  border-radius: 999px;
  transition: width .4s ease;
  box-shadow: 0 0 12px rgba(238,9,121,.35);
}

/* ---------- Question editor (admin) ---------- */
.ios-q-card {
  background: rgba(255,255,255,.85);
  border: 1px solid var(--ios-stroke);
  border-radius: var(--ios-radius);
  padding: 18px;
  margin-bottom: 14px;
  transition: box-shadow .2s, transform .15s;
}
.ios-q-card:hover { box-shadow: var(--ios-shadow); }
.ios-q-num {
  display:inline-flex; align-items:center; justify-content:center;
  min-width: 32px; height: 32px; padding: 0 10px;
  border-radius: 10px;
  background: var(--ios-grad-warm); color:#fff;
  font-weight: 700; font-size:.9rem;
  margin-right: 10px;
}
.ios-opt-row {
  display:flex; align-items:center; gap:10px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(247,248,251,.9);
  border: 1px solid transparent;
  margin-bottom: 8px;
}
.ios-opt-row.correct {
  background: rgba(52,199,89,.10);
  border-color: rgba(52,199,89,.45);
}
.ios-opt-row .ios-input { background: transparent; border: none; padding: 4px 6px; }
.ios-opt-row .ios-input:focus { background: #fff; border: 1px solid var(--ios-stroke); }

/* ---------- Modal (overlay) ---------- */
.ios-modal-backdrop {
  position: fixed; inset: 0; z-index: 1050;
  background: rgba(20,30,60,.35);
  backdrop-filter: blur(8px);
  display:flex; align-items:center; justify-content:center;
  padding: 20px;
  animation: ios-fade .2s ease;
}
.ios-modal {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(30px) saturate(160%);
  border-radius: var(--ios-radius-lg);
  padding: 28px;
  box-shadow: var(--ios-shadow-lg);
  max-width: 480px; width: 100%;
  animation: ios-pop .25s cubic-bezier(.2,.9,.3,1.4);
}
@keyframes ios-fade { from { opacity:0 } to { opacity:1 } }
@keyframes ios-pop  { from { opacity:0; transform: scale(.92) } to { opacity:1; transform: scale(1) } }

/* ---------- Alerts ---------- */
.ios-alert {
  padding: 14px 18px;
  border-radius: 14px;
  display:flex; gap:10px; align-items:flex-start;
  margin-bottom: 16px;
  background: rgba(0,122,255,.08);
  color: #0a4a99;
  border: 1px solid rgba(0,122,255,.2);
}
.ios-alert.success { background: rgba(52,199,89,.12); color: #126a30; border-color: rgba(52,199,89,.3); }
.ios-alert.danger  { background: rgba(255,59,48,.10); color: #8b1d18; border-color: rgba(255,59,48,.3); }
.ios-alert.warning { background: rgba(255,149,0,.12); color: #7a4f00; border-color: rgba(255,149,0,.3); }

/* ---------- Headings & utils ---------- */
.ios-h1 { font-size: 1.85rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 6px; }
.ios-h2 { font-size: 1.35rem; font-weight: 700; letter-spacing: -.01em; margin: 0 0 14px; }
.ios-muted { color: var(--ios-text-2); }
.ios-divider { height: 1px; background: var(--ios-stroke); margin: 18px 0; border:none; }

/* Mobile */
@media (max-width: 768px) {
  .ios-sidebar { min-height: auto; padding: 10px; }
  .ios-card { padding: 18px; border-radius: var(--ios-radius); }
  .ios-card.hero { padding: 22px; border-radius: var(--ios-radius-lg); }
}

/* ===== Tables on glass ===== */
.ios-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.ios-table thead th {
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(10px);
  font-weight: 700; font-size: .82rem; text-transform: uppercase;
  color: var(--ios-text-2); letter-spacing: .04em;
  padding: 12px 14px; text-align: left;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.ios-table tbody td {
  padding: 14px; border-bottom: 1px solid rgba(0,0,0,0.04);
  font-size: .95rem; vertical-align: middle;
}
.ios-table tbody tr:hover { background: rgba(255,255,255,0.45); }
.ios-table tbody tr:last-child td { border-bottom: none; }

/* ===== Status badges ===== */
.ios-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 999px;
  font-size: .75rem; font-weight: 600; line-height: 1;
}
.ios-badge.success { background: rgba(52,199,89,.15); color: #1b8c3a; }
.ios-badge.danger  { background: rgba(255,59,48,.15); color: #c0392b; }
.ios-badge.warning { background: rgba(255,149,0,.15); color: #b85a00; }
.ios-badge.info    { background: rgba(0,122,255,.15); color: #0060c8; }
.ios-badge.muted   { background: rgba(120,120,128,.18); color: var(--ios-text-2); }

/* Compact stat tile */
.ios-stat-tile {
  background: var(--ios-card);
  backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--ios-card-border);
  border-radius: var(--ios-radius);
  padding: 18px 20px;
  display: flex; align-items: center; gap: 14px;
  transition: transform .2s;
}
.ios-stat-tile:hover { transform: translateY(-3px); }
.ios-stat-tile .icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; flex-shrink: 0;
}
.ios-stat-tile .icon.b { background: var(--ios-grad-cool); color: #fff; }
.ios-stat-tile .icon.p { background: var(--ios-grad-warm); color: #fff; }
.ios-stat-tile .icon.g { background: linear-gradient(135deg,#34c759,#30d158); color: #fff; }
.ios-stat-tile .icon.o { background: linear-gradient(135deg,#ff9500,#ff6a00); color: #fff; }
.ios-stat-tile .num { font-size: 1.6rem; font-weight: 800; line-height: 1; letter-spacing: -0.02em; }
.ios-stat-tile .lbl { color: var(--ios-text-2); font-size: .85rem; margin-top: 4px; }

.ios-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: rgba(0,0,0,.05); padding: 2px 8px; border-radius: 6px; font-size: .85rem;
}

/* iOS login layout */
.ios-login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.ios-login-card {
  width: 100%; max-width: 420px;
  background: var(--ios-card);
  backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--ios-card-border);
  border-radius: var(--ios-radius-xl);
  box-shadow: var(--ios-shadow);
  padding: 44px;
}
.ios-login-icon {
  width: 78px; height: 78px; margin: 0 auto 18px;
  background: var(--ios-grad-warm); color: #fff;
  border-radius: 24px; display: flex; align-items: center; justify-content: center;
  font-size: 34px; box-shadow: 0 14px 30px rgba(238,9,121,.32);
}