/**
 * UOS Admission Assistant — Shared Design System
 * One set of tokens/components used across every public page AND the admin
 * console, layered on top of Tailwind's utility classes (which remain the
 * default for layout/spacing). Brand color is blue, matching the identity
 * already established on the homepage hero.
 */

:root {
  --brand-50:  #EFF6FF;
  --brand-100: #DBEAFE;
  --brand-500: #3B82F6;
  --brand-600: #2563EB;
  --brand-700: #1D4ED8;
  --brand-900: #1E3A8A;

  --ink:       #0F172A; /* slate-900 */
  --ink-2:     #475569; /* slate-600 */
  --muted:     #64748B; /* slate-500 */
  --border:    #E2E8F0; /* slate-200 */
  --border-soft: #F1F5F9; /* slate-100 */
  --bg:        #F8FAFC; /* slate-50 */
  --card:      #FFFFFF;

  --success:    #16A34A; --success-bg: #DCFCE7;
  --warning:    #D97706; --warning-bg: #FEF3C7;
  --danger:     #DC2626; --danger-bg:  #FEE2E2;
  --info:       #2563EB; --info-bg:    #DBEAFE;

  --radius:    16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,.10);
  --shadow-lg: 0 20px 50px rgba(15,23,42,.18);
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* ===================== FOCUS ===================== */
.uos-focus:focus-visible,
.btn:focus-visible,
.field-input:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 22px; border-radius: var(--radius-sm);
  font-weight: 700; font-size: 14px; white-space: nowrap; cursor: pointer;
  border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s, box-shadow .15s, transform .15s;
}
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-block { width: 100%; }
.btn-sm { height: 38px; padding: 0 16px; font-size: 13px; }
.btn-primary { background: var(--brand-600); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover:not(:disabled) { background: var(--brand-700); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover:not(:disabled) { background: #000; }
.btn-secondary { background: #fff; color: var(--ink-2); border-color: var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--bg); border-color: #CBD5E1; color: var(--ink); }
.btn-ghost { background: transparent; color: var(--ink-2); }
.btn-ghost:hover:not(:disabled) { background: var(--bg); color: var(--ink); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #B91C1C; }
.btn-danger-ghost { background: #fff; color: var(--danger); border-color: var(--border); }
.btn-danger-ghost:hover:not(:disabled) { background: var(--danger-bg); border-color: #FECACA; }

.btn-spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.4); border-top-color: #fff;
  animation: uos-spin .7s linear infinite; flex: 0 0 auto;
}
.btn-secondary .btn-spinner, .btn-ghost .btn-spinner { border-color: rgba(15,23,42,.15); border-top-color: var(--ink-2); }
@keyframes uos-spin { to { transform: rotate(360deg); } }

/* ===================== FORM FIELDS ===================== */
.field-input {
  width: 100%; padding: 0 16px; height: 48px; border-radius: 12px;
  background: var(--bg); border: 1px solid var(--border); font-size: 14px; font-weight: 500;
  color: var(--ink); transition: border-color .15s, box-shadow .15s, background .15s;
}
.field-input:focus { outline: none; border-color: var(--brand-600); box-shadow: 0 0 0 3px rgba(37,99,235,.15); background: #fff; }
.field-input.field-invalid { border-color: var(--danger); background: var(--danger-bg); }
.field-input.field-invalid:focus { box-shadow: 0 0 0 3px rgba(220,38,38,.15); }
.field-error-text { display: none; margin-top: 6px; font-size: 12.5px; font-weight: 600; color: var(--danger); align-items: center; gap: 6px; }
.field-error-text.show { display: flex; }
.field-hint { margin-top: 6px; font-size: 12px; color: var(--muted); font-weight: 500; }

.password-field-wrap { position: relative; }
.password-field-wrap .field-input { padding-right: 44px; }
.password-toggle-btn {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: var(--muted); background: transparent; border: none; cursor: pointer;
}
.password-toggle-btn:hover { background: var(--border-soft); color: var(--ink-2); }

.pw-strength { display: flex; gap: 4px; margin-top: 8px; }
.pw-strength i { display: block; height: 4px; flex: 1; border-radius: 99px; background: var(--border); transition: background .2s; }
.pw-strength[data-level="1"] i:nth-child(1) { background: var(--danger); }
.pw-strength[data-level="2"] i:nth-child(-n+2) { background: var(--warning); }
.pw-strength[data-level="3"] i:nth-child(-n+3) { background: #65A30D; }
.pw-strength[data-level="4"] i { background: var(--success); }
.pw-strength-label { font-size: 11.5px; font-weight: 700; margin-top: 5px; color: var(--muted); }

/* ===================== ALERTS / BANNERS ===================== */
.alert-banner {
  display: flex; gap: 10px; align-items: flex-start; padding: 13px 15px; border-radius: 12px;
  font-size: 13.5px; font-weight: 600; border: 1px solid; line-height: 1.5;
}
.alert-error   { background: var(--danger-bg);  border-color: #FECACA; color: #991B1B; }
.alert-warning { background: var(--warning-bg); border-color: #FDE68A; color: #92400E; }
.alert-info    { background: var(--info-bg);    border-color: #BFDBFE; color: #1E40AF; }
.alert-success { background: var(--success-bg); border-color: #BBF7D0; color: #166534; }

/* ===================== BADGES ===================== */
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 11px; border-radius: 999px; font-size: 11.5px; font-weight: 800; white-space: nowrap; }
.badge-brand   { background: var(--brand-100); color: var(--brand-700); }
.badge-neutral { background: var(--border-soft); color: var(--ink-2); }
.badge-success { background: var(--success-bg); color: #15803D; }
.badge-warning { background: var(--warning-bg); color: #B45309; }
.badge-danger  { background: var(--danger-bg);  color: #B91C1C; }

/* ===================== MODAL ===================== */
.uos-modal-overlay {
  position: fixed; inset: 0; z-index: 200; background: rgba(15,23,42,.55);
  backdrop-filter: blur(2px); display: flex; align-items: center; justify-content: center; padding: 20px;
  animation: uos-fade-in .18s ease;
}
.uos-modal {
  background: #fff; border-radius: 20px; box-shadow: var(--shadow-lg);
  width: 100%; max-width: 420px; max-height: 90vh; overflow-y: auto;
  animation: uos-modal-in .2s cubic-bezier(.2,.8,.2,1);
}
.uos-modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 22px 24px 0; }
.uos-modal-header h3 { font-size: 18px; font-weight: 800; color: var(--ink); }
.uos-modal-header p { font-size: 13px; color: var(--muted); margin-top: 4px; }
.uos-modal-close { width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--muted); flex: 0 0 auto; background: none; border: none; cursor: pointer; }
.uos-modal-close:hover { background: var(--border-soft); color: var(--ink); }
.uos-modal-body { padding: 18px 24px; }
.uos-modal-footer { display: flex; gap: 10px; justify-content: flex-end; padding: 0 24px 24px; }
@keyframes uos-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes uos-modal-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }

/* ===================== TOASTS ===================== */
#uos-toasts { position: fixed; bottom: 20px; right: 20px; left: 20px; z-index: 300; display: flex; flex-direction: column; align-items: flex-end; gap: 10px; pointer-events: none; }
.uos-toast {
  display: flex; align-items: center; gap: 10px; max-width: 360px; pointer-events: auto;
  background: var(--ink); color: #F8FAFC; padding: 13px 16px; border-radius: 12px;
  font-size: 13.5px; font-weight: 600; box-shadow: var(--shadow-md); animation: uos-toast-in .22s ease;
}
.uos-toast.success { background: #14532D; }
.uos-toast.error   { background: #7F1D1D; }
.uos-toast .toast-icon { flex: 0 0 auto; }
@keyframes uos-toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ===================== SKELETON ===================== */
.uos-skel { border-radius: 8px; background: linear-gradient(90deg,#EEF2F7 25%,#F8FAFC 50%,#EEF2F7 75%); background-size: 200% 100%; animation: uos-shimmer 1.4s infinite; }
@keyframes uos-shimmer { to { background-position: -200% 0; } }

/* ===================== PROGRESS STEPPER ===================== */
.uos-stepper { display: flex; align-items: center; gap: 6px; }
.uos-stepper .step { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; color: var(--muted); }
.uos-stepper .step-dot { width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 11px; color: var(--muted); flex: 0 0 auto; background: #fff; }
.uos-stepper .step.done .step-dot { background: var(--success); border-color: var(--success); color: #fff; }
.uos-stepper .step.active .step-dot { background: var(--brand-600); border-color: var(--brand-600); color: #fff; }
.uos-stepper .step.active, .uos-stepper .step.done { color: var(--ink); }
.uos-stepper .step-line { width: 24px; height: 2px; background: var(--border); flex: 0 0 auto; }
.uos-stepper .step-line.done { background: var(--success); }

/* ===================== HERO / BRAND VISUAL LANGUAGE ===================== */
.uos-hero-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
  background-image: radial-gradient(#CBD5E1 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  opacity: .5;
}
.uos-hero-glow { position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.uos-hero-glow i {
  position: absolute; display: block; border-radius: 50%; filter: blur(70px);
}
.uos-hero-glow i:nth-child(1) { top: -12%; left: -6%; width: 42%; height: 55%; background: rgba(37,99,235,.22); }
.uos-hero-glow i:nth-child(2) { top: 15%; right: -8%; width: 34%; height: 45%; background: rgba(99,102,241,.18); }

.uos-brand-badge {
  width: 76px; height: 76px; border-radius: 22px; margin: 0 auto;
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 30px -6px rgba(37,99,235,.5), 0 0 0 6px rgba(37,99,235,.08);
}
.uos-brand-badge img { width: 56%; height: 56%; filter: brightness(0) invert(1); }

.uos-trust-bar { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; }
.uos-trust-bar .item { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; color: var(--ink-2); }
.uos-trust-bar .item b { color: var(--ink); font-weight: 800; }
.uos-trust-bar .item i { color: var(--brand-600); font-size: 12px; }

.uos-card-hover { transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.uos-card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #BFDBFE; }

.text-gradient-brand { background: linear-gradient(90deg, var(--brand-700), var(--brand-500) 60%, #6366F1); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ===================== NAV: MOBILE DRAWER + DROPDOWN ===================== */
.uos-nav-overlay {
  position: fixed; inset: 0; z-index: 45; background: rgba(15,23,42,.5); backdrop-filter: blur(2px);
  opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
.uos-nav-overlay.show { opacity: 1; pointer-events: auto; }
body.uos-nav-locked { overflow: hidden; }

#uos-mobile-menu {
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: transform .2s ease, opacity .2s ease;
}
#uos-mobile-menu.show { transform: translateY(0); opacity: 1; pointer-events: auto; }
#mobile-logout-section { display: none; }
#mobile-auth-section.hidden + #mobile-logout-section { display: block; }

.uos-more-panel {
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
}
.uos-more-panel.show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ===================== ANNOUNCEMENT BANNER ===================== */
.uos-announce-bar {
  display: flex; align-items: center; gap: 12px; padding: 12px 20px;
  font-size: 13.5px; font-weight: 600; color: #fff; position: relative; z-index: 40;
}
.uos-announce-bar.info    { background: linear-gradient(90deg, var(--brand-700), var(--brand-600)); }
.uos-announce-bar.urgent  { background: linear-gradient(90deg, #B45309, #D97706); }
.uos-announce-bar.success { background: linear-gradient(90deg, #166534, #16A34A); }
.uos-announce-bar .a-inner { max-width: 80rem; margin: 0 auto; width: 100%; display: flex; align-items: center; gap: 12px; }
.uos-announce-bar .a-icon { flex: 0 0 auto; }
.uos-announce-bar .a-text { flex: 1; min-width: 0; }
.uos-announce-bar .a-text b { font-weight: 800; }
.uos-announce-bar .a-close { flex: 0 0 auto; background: rgba(255,255,255,.18); border: none; color: #fff; width: 24px; height: 24px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.uos-announce-bar .a-close:hover { background: rgba(255,255,255,.3); }

/* ===================== CONTINUOUS TICKER (e.g. recent community Q&A) ===================== */
.uos-marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.uos-marquee-track { display: flex; width: max-content; gap: 16px; animation: uos-marquee-scroll 38s linear infinite; }
.uos-marquee:hover .uos-marquee-track { animation-play-state: paused; }
@keyframes uos-marquee-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.uos-marquee-card {
  flex: 0 0 auto; width: 320px; background: #fff; border: 1px solid var(--border); border-radius: 16px;
  padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.uos-marquee-card .q-by { font-size: 11px; font-weight: 800; color: var(--brand-600); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; }
.uos-marquee-card .q-text { font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 8px; line-height: 1.4; }
.uos-marquee-card .a-text { font-size: 12.5px; color: var(--ink-2); line-height: 1.5; }
@media (prefers-reduced-motion: reduce) { .uos-marquee-track { animation: none; overflow-x: auto; } }

/* ===================== HELP TOOLTIP (jargon explainers) ===================== */
.uos-help { position: relative; display: inline-flex; }
.uos-help .help-icon { width: 16px; height: 16px; border-radius: 50%; background: var(--border-soft); color: var(--muted); font-size: 10px; font-weight: 800; display: inline-flex; align-items: center; justify-content: center; cursor: help; }
.uos-help .help-pop {
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: 220px; background: var(--ink); color: #E2E8F0; font-size: 12px; font-weight: 500; line-height: 1.5;
  padding: 10px 12px; border-radius: 10px; box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none; transition: opacity .15s; z-index: 40;
}
.uos-help:hover .help-pop, .uos-help:focus-within .help-pop { opacity: 1; }