/* ═══════════════════════════════════════════════════════════
   VTU Results Dashboard  –  style.css
   Aesthetic: Scholarly-Futurist  •  Deep navy + electric teal
   Fonts: Sora (display) + DM Sans (body)
 ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,300&display=swap');

/* ─── Design tokens ─────────────────────────────────────── */
:root {
  --bg-deep:       #080d1a;
  --bg-mid:        #0d1528;
  --bg-card:       #111d36;
  --bg-card-hover: #152240;
  --border:        rgba(99,179,237,0.12);
  --border-glow:   rgba(99,179,237,0.35);

  --teal:       #38bdf8;
  --teal-dim:   #0ea5e9;
  --teal-glow:  rgba(56,189,248,0.18);
  --amber:      #fbbf24;
  --green:      #34d399;
  --red:        #f87171;
  --purple:     #a78bfa;

  --text-primary:   #e2eaf6;
  --text-secondary: #8faac8;
  --text-muted:     #4a6080;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.45), 0 1px 3px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 40px rgba(56,189,248,0.10);
  --transition: 0.24s cubic-bezier(0.4,0,0.2,1);
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ─── Ambient mesh background ────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(56,189,248,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(167,139,250,0.05) 0%, transparent 55%),
    radial-gradient(ellipse 40% 30% at 60% 50%,  rgba(56,189,248,0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ─── App wrapper ────────────────────────────────────────── */
.app-wrapper {
  position: relative; z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

/* ═══════════════════════════════════════════════════════════
   HEADER
 ═══════════════════════════════════════════════════════════ */
.site-header {
  text-align: center;
  padding: 56px 20px 40px;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(56,189,248,0.08);
  border: 1px solid var(--border-glow);
  border-radius: 50px;
  padding: 6px 18px 6px 10px;
  margin-bottom: 24px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
}
.logo-badge svg { width: 20px; height: 20px; fill: var(--teal); }

.site-header h1 {
  font-family: 'Sora', sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 0%, var(--teal) 60%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
}
.site-header p {
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 300;
  max-width: 540px;
  margin: 0 auto;
}

/* ═══════════════════════════════════════════════════════════
   SEARCH CARD
 ═══════════════════════════════════════════════════════════ */
.search-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 40px 32px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.search-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  opacity: 0.6;
}

/* Row 1: USN + Semester */
.search-row-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
@media (max-width: 600px) {
  .search-row-top { grid-template-columns: 1fr; }
  .search-card { padding: 24px 18px 22px; }
}

/* Row 2: CAPTCHA + answer + button */
.search-row-bottom {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: end;
}
@media (max-width: 720px) {
  .search-row-bottom {
    grid-template-columns: 1fr;
  }
}

/* ─── Generic field group ────────────────────────────────── */
.field-group { display: flex; flex-direction: column; gap: 8px; }

.field-group label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.field-group input,
.field-group select {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  width: 100%;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.field-group input::placeholder { color: var(--text-muted); }
.field-group input:focus,
.field-group select:focus {
  border-color: var(--teal-dim);
  background: rgba(56,189,248,0.05);
  box-shadow: 0 0 0 3px var(--teal-glow);
}
.field-group select option { background: var(--bg-mid); }

/* ─── CAPTCHA Widget ─────────────────────────────────────── */
.captcha-widget {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.captcha-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.captcha-title-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* Canvas */
#captcha-canvas {
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glow);
  background: #0a1322;
  cursor: default;
  /* subtle inner glow */
  box-shadow: inset 0 0 20px rgba(56,189,248,0.06);
  max-width: 100%;
}

.captcha-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin: 0;
}

/* Refresh button */
.btn-refresh {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: 1px solid var(--border-glow);
  background: rgba(56,189,248,0.06);
  color: var(--teal);
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn-refresh svg { width: 12px; height: 12px; transition: transform 0.4s ease; }
.btn-refresh:hover { background: rgba(56,189,248,0.14); }
.btn-refresh:hover svg { transform: rotate(-180deg); }

/* CAPTCHA answer input */
.captcha-answer-group { min-width: 120px; }
.captcha-answer-group input {
  font-family: 'Sora', sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.15em;
}

/* ─── Submit button ──────────────────────────────────────── */
.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: linear-gradient(135deg, var(--teal-dim) 0%, #0369a1 100%);
  color: #fff;
  font-family: 'Sora', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0 26px;
  cursor: pointer;
  white-space: nowrap;
  height: 48px;
  box-shadow: 0 4px 16px rgba(14,165,233,0.28);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.btn-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(14,165,233,0.42);
}
.btn-submit:active:not(:disabled) { transform: translateY(0); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

/* spinner */
.btn-submit .spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}
.btn-submit.loading .spinner { display: block; }
.btn-submit.loading .btn-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Alerts ─────────────────────────────────────────────── */
.alert {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  margin-top: 20px;
}
.alert.show { display: flex; }
.alert svg { width: 18px; height: 18px; flex-shrink: 0; }

.alert-error {
  background: rgba(248,113,113,0.10);
  border: 1px solid rgba(248,113,113,0.30);
  color: #fca5a5;
}
.alert-info {
  background: rgba(56,189,248,0.08);
  border: 1px solid var(--border-glow);
  color: var(--teal);
}

/* ═══════════════════════════════════════════════════════════
   LOADING SKELETON
 ═══════════════════════════════════════════════════════════ */
#loading-area { display: none; }

.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 20px;
}
.skel {
  border-radius: 6px;
  background: linear-gradient(90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.08) 50%,
    rgba(255,255,255,0.04) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skel-h   { height: 22px; margin-bottom: 12px; }
.skel-row { height: 14px; margin-bottom: 8px; }
.skel-short { width: 40%; }
.skel-mid   { width: 65%; }
.skel-full  { width: 100%; }

/* ═══════════════════════════════════════════════════════════
   RESULTS DASHBOARD
 ═══════════════════════════════════════════════════════════ */
#results-area { display: none; }

/* ─── Student summary ────────────────────────────────────── */
.student-summary {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}

.student-avatar {
  width: 54px; height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-dim), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-family: 'Sora', sans-serif;
  font-size: 22px; font-weight: 800;
  color: #fff; flex-shrink: 0;
}
.student-info h2 {
  font-family: 'Sora', sans-serif;
  font-size: 18px; font-weight: 700; letter-spacing: -0.01em;
}
.student-info p { font-size: 13px; color: var(--text-secondary); }

.summary-stats { margin-left: auto; display: flex; gap: 28px; flex-wrap: wrap; }
.stat-pill { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.stat-pill .stat-val {
  font-family: 'Sora', sans-serif;
  font-size: 22px; font-weight: 800;
  background: linear-gradient(135deg, var(--teal), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-pill .stat-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-muted);
}

/* ─── Action bar ─────────────────────────────────────────── */
.action-bar {
  display: flex; gap: 12px;
  margin-bottom: 24px; flex-wrap: wrap;
}
.btn-action {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: 50px;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-glow);
  background: rgba(56,189,248,0.06);
  color: var(--teal);
  transition: background var(--transition), transform var(--transition);
}
.btn-action:hover { background: rgba(56,189,248,0.14); transform: translateY(-1px); }
.btn-action svg { width: 16px; height: 16px; }

/* ─── Semester card ──────────────────────────────────────── */
.sem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
  animation: fadeSlideUp 0.38s ease both;
}
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sem-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-card), var(--shadow-glow); }

/* stagger delays */
.sem-card:nth-child(1) { animation-delay: 0.04s; }
.sem-card:nth-child(2) { animation-delay: 0.08s; }
.sem-card:nth-child(3) { animation-delay: 0.12s; }
.sem-card:nth-child(4) { animation-delay: 0.16s; }
.sem-card:nth-child(5) { animation-delay: 0.20s; }
.sem-card:nth-child(6) { animation-delay: 0.24s; }
.sem-card:nth-child(7) { animation-delay: 0.28s; }
.sem-card:nth-child(8) { animation-delay: 0.32s; }

.sem-header {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
  gap: 12px; flex-wrap: wrap;
}
.sem-card.open .sem-header {
  border-bottom-color: var(--border);
  background: rgba(56,189,248,0.04);
}

.sem-title { display: flex; align-items: center; gap: 12px; }

.sem-badge {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(56,189,248,0.18), rgba(167,139,250,0.13));
  border: 1px solid var(--border-glow);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Sora', sans-serif;
  font-size: 16px; font-weight: 800; color: var(--teal);
}
.sem-name  { font-family: 'Sora', sans-serif; font-size: 16px; font-weight: 700; }
.sem-meta  { font-size: 12px; color: var(--text-secondary); }

.sem-pills { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pill {
  padding: 4px 12px; border-radius: 50px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.02em;
}
.pill-sgpa { background: rgba(56,189,248,0.12);  color: var(--teal);   border: 1px solid rgba(56,189,248,0.25);  }
.pill-cgpa { background: rgba(167,139,250,0.12); color: var(--purple); border: 1px solid rgba(167,139,250,0.25); }
.pill-pass { background: rgba(52,211,153,0.10);  color: var(--green);  border: 1px solid rgba(52,211,153,0.22);  }
.pill-fail { background: rgba(248,113,113,0.10); color: var(--red);    border: 1px solid rgba(248,113,113,0.22); }

.sem-chevron {
  width: 20px; height: 20px; color: var(--text-muted);
  transition: transform var(--transition); flex-shrink: 0;
}
.sem-card.open .sem-chevron { transform: rotate(180deg); }

.sem-body { display: none; padding: 0 24px 20px; }
.sem-card.open .sem-body { display: block; }

/* ─── Subject table ──────────────────────────────────────── */
.result-table {
  width: 100%; border-collapse: collapse;
  margin-top: 16px; font-size: 14px;
}
.result-table th {
  text-align: left; padding: 10px 14px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.result-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(99,179,237,0.06);
  vertical-align: middle;
}
.result-table tr:last-child td { border-bottom: none; }
.result-table tr:hover td { background: rgba(255,255,255,0.02); }

.sub-code  { font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 700; color: var(--text-secondary); letter-spacing: 0.05em; }
.sub-name  { font-weight: 500; color: var(--text-primary); }
.marks-cell { font-family: 'Sora', sans-serif; font-weight: 700; font-size: 15px; color: var(--amber); }

.marks-bar  { height: 4px; border-radius: 4px; background: rgba(255,255,255,0.06); margin-top: 5px; overflow: hidden; }
.marks-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--teal-dim), var(--teal)); transition: width 0.8s cubic-bezier(0.4,0,0.2,1); }

.result-badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: 50px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.05em;
}
.result-badge.pass { background: rgba(52,211,153,0.12); color: var(--green); border: 1px solid rgba(52,211,153,0.25); }
.result-badge.fail { background: rgba(248,113,113,0.12); color: var(--red);   border: 1px solid rgba(248,113,113,0.25); }
.result-badge.ab   { background: rgba(251,191,36,0.10);  color: var(--amber); border: 1px solid rgba(251,191,36,0.25);  }

/* ═══════════════════════════════════════════════════════════
   FOOTER
 ═══════════════════════════════════════════════════════════ */
.footer-notice {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 52px;
  line-height: 1.8;
}
.footer-notice a { color: var(--teal); text-decoration: none; }
.footer-notice a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
 ═══════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .student-summary  { flex-direction: column; align-items: flex-start; }
  .summary-stats    { margin-left: 0; }
  .sem-header       { flex-direction: column; align-items: flex-start; }
  .result-table th:nth-child(3),
  .result-table td:nth-child(3) { display: none; }
}

/* ═══════════════════════════════════════════════════════════
   PRINT
 ═══════════════════════════════════════════════════════════ */
@media print {
  body { background: #fff; color: #111; }
  body::before { display: none; }
  .search-card, .action-bar, .site-header p, .footer-notice { display: none; }
  .sem-card  { box-shadow: none; border: 1px solid #ddd; }
  .sem-body  { display: block !important; }
  .sem-header { cursor: default; }
  .result-table th, .result-table td { color: #111; }
  .marks-bar { display: none; }
  #results-area { display: block !important; }
}