/* ============ ISTC Computer Centre — styles ============ */

/* ---- Theme tokens (Trust Blue default) ---- */
:root {
  --bg: #F7F5EF;
  --ink: #0E1A2B;
  --sub: #4A5568;
  --surface: #FFFFFF;
  --line: #E4E0D5;
  --primary: #0B3D91;
  --primary-ink: #FFFFFF;
  --accent: #E86A2C;
  --accent-ink: #FFFFFF;
  --chip: #EAF0FB;
}

[data-palette="saffron-warm"] {
  --bg: #FFF8EE; --ink: #1C1208; --sub: #5A4632;
  --surface: #FFFFFF; --line: #EADFCB;
  --primary: #C3511A; --primary-ink: #FFFFFF;
  --accent: #124E3C; --accent-ink: #FFFFFF;
  --chip: #FBE9D2;
}
[data-palette="fresh-green"] {
  --bg: #F3F7F1; --ink: #0C1B12; --sub: #43594B;
  --surface: #FFFFFF; --line: #DCE5D7;
  --primary: #1F6B3A; --primary-ink: #FFFFFF;
  --accent: #D4A017; --accent-ink: #1C1208;
  --chip: #E1EEDA;
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; overflow-x: hidden; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', 'Noto Sans Devanagari', -apple-system, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.85; }
button { font-family: inherit; }
button:hover { filter: brightness(1.05); }
input:focus, select:focus { outline: 2px solid currentColor; outline-offset: 1px; }
img { display: block; max-width: 100%; }

/* ---- Typography helpers ---- */
.serif { font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif; font-weight: 500; }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }
.italic { font-style: italic; }

/* ---- Layout ---- */
.section { padding: 80px 56px; border-bottom: 1px solid var(--line); }
.section-dark { background: var(--ink); color: var(--bg); border-bottom: none; }
.section-chip { background: var(--chip); }
.container { max-width: 1280px; margin: 0 auto; }

.section-header {
  display: flex; justify-content: space-between; align-items: end;
  margin-bottom: 40px; gap: 32px;
}
.kicker {
  font-size: 12px; color: var(--sub);
  letter-spacing: 1.5px; text-transform: uppercase; font-weight: 600;
}
.section-h2 {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 56px; font-weight: 500;
  margin: 12px 0 0; color: var(--ink);
  letter-spacing: -1.5px; line-height: 1.1;
}
.section-h2 .italic { color: var(--accent); }
.section-aside { color: var(--sub); font-size: 15px; max-width: 360px; text-align: right; }

/* ---- Nav ---- */
.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 56px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg); z-index: 10;
}
.brandmark { display: flex; align-items: center; gap: 10px; }
.brandmark-img {
  width: 44px; height: 44px; border-radius: 999px;
  object-fit: cover; object-position: center 42%;
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}
.brandmark-logo {
  width: 38px; height: 38px; border-radius: 8px;
  background: var(--primary); color: var(--primary-ink);
  display: grid; place-items: center;
  font-family: 'Fraunces', Georgia, serif; font-weight: 700; font-size: 20px;
  letter-spacing: -0.5px;
}
.brandmark-text { line-height: 1.05; }
.brandmark-text .name { font-weight: 700; font-size: 16px; color: var(--ink); letter-spacing: 0.3px; }
.brandmark-text .sub { font-size: 11px; color: var(--sub); letter-spacing: 1.2px; text-transform: uppercase; }

.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { color: var(--ink); font-size: 14px; font-weight: 500; }
.nav-cta {
  background: var(--ink); color: var(--bg);
  padding: 10px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 500; white-space: nowrap;
}

/* ---- Hero ---- */
.hero { padding: 64px 56px 0; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.hero-chip {
  display: inline-flex; gap: 8px; align-items: center;
  padding: 6px 12px; border-radius: 999px;
  background: var(--chip); color: var(--primary);
  font-size: 12px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase;
}
.hero-chip-dot { width: 6px; height: 6px; border-radius: 999px; background: var(--accent); }
.hero-h1 {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: clamp(40px, 5.6vw, 86px);
  line-height: 1.02; letter-spacing: -2px;
  margin: 20px 0 18px; color: var(--ink);
  font-weight: 500; text-wrap: balance;
}
.hero-h1 .accent { color: var(--accent); font-style: italic; }
.hero-sub {
  font-size: 18px; line-height: 1.55; color: var(--sub);
  max-width: 540px; margin: 0 0 28px; text-wrap: pretty;
}
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn-primary {
  background: var(--primary); color: var(--primary-ink);
  padding: 16px 28px; border-radius: 10px;
  font-weight: 600; font-size: 16px; border: none; cursor: pointer;
}
.btn-secondary {
  background: transparent; color: var(--ink);
  padding: 16px 20px; border-radius: 10px;
  font-weight: 500; font-size: 16px;
  border: 1px solid var(--line);
}
.hero-image {
  position: relative; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 50px -20px rgba(0,0,0,0.15);
  aspect-ratio: 1/1;
}
.hero-image img { width: 100%; height: 100%; object-fit: cover; }
.hero-image-badge {
  position: absolute; left: 16px; bottom: 16px;
  background: var(--surface); padding: 10px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 600; color: var(--ink);
  display: flex; gap: 8px; align-items: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}
.hero-image-badge-dot { width: 8px; height: 8px; border-radius: 999px; background: #22C55E; }

.hero-stats {
  margin-top: 56px; padding: 32px 0; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
}
.hero-stat-n {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 38px; font-weight: 500; color: var(--ink); line-height: 1; letter-spacing: -1px;
}
.hero-stat-l { font-size: 13px; color: var(--sub); margin-top: 6px; }

/* ---- Combos (dark section) ---- */
.combos { padding: 80px 56px; background: var(--ink); color: var(--bg); }
.combos .kicker { color: rgba(255,255,255,0.6); }
.combos-header {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px;
  align-items: end; margin-bottom: 48px;
}
.combos-h2 {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 60px; font-weight: 500;
  margin: 12px 0 0; letter-spacing: -1.8px; line-height: 1.05; color: var(--bg);
}
.combos-h2 .accent { color: var(--accent); font-style: italic; }
.combos-intro { opacity: 0.7; font-size: 16px; line-height: 1.6; }
.combos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.combo-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 32px; border-radius: 12px;
  display: flex; flex-direction: column; gap: 16px; min-height: 240px;
}
.combo-tag {
  font-size: 11px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  color: var(--accent); font-family: 'JetBrains Mono', monospace;
}
.combo-title {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 26px; font-weight: 500; line-height: 1.2; letter-spacing: -0.5px;
}
.combo-sub { font-size: 15px; line-height: 1.5; opacity: 0.75; }

.combos-banner {
  margin-top: 40px; padding: 20px 28px;
  background: var(--accent); color: var(--accent-ink); border-radius: 10px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.combos-banner-text { font-size: 16px; font-weight: 600; }
.combos-banner-cta {
  background: var(--ink); color: var(--bg); padding: 10px 20px;
  border-radius: 999px; font-weight: 600; font-size: 14px;
}

/* ---- Courses ---- */
.course-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: 4px;
}
.course-card {
  background: var(--surface); padding: 28px 24px;
  display: flex; flex-direction: column; gap: 12px; min-height: 220px;
  cursor: pointer; transition: background 0.15s ease;
  border: none; text-align: left; font: inherit;
}
.course-card:hover { background: rgba(0,0,0,0.02); }
.course-card:hover .course-details-link { transform: translateX(3px); }
.course-card:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.course-card-head { display: flex; justify-content: space-between; align-items: start; }
.course-code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px; color: var(--sub); letter-spacing: 1px;
}
.course-tag {
  font-size: 10px; font-weight: 600; letter-spacing: 0.5px;
  padding: 3px 8px; border-radius: 999px;
  background: var(--chip); color: var(--primary);
  text-transform: uppercase;
}
.course-tag.is-highlight { background: var(--accent); color: var(--accent-ink); }
.course-name {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 21px; font-weight: 500; color: var(--ink);
  letter-spacing: -0.3px; line-height: 1.15;
}
.course-desc { font-size: 14px; color: var(--sub); line-height: 1.5; flex: 1; }
.course-foot {
  font-size: 12px; color: var(--sub); padding-top: 10px;
  border-top: 1px dashed var(--line);
  display: flex; justify-content: space-between;
}
.course-details-link { color: var(--primary); font-weight: 600; transition: transform 0.18s ease; display: inline-block; }

/* ---- Why ISTC ---- */
.why-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; }
.why-sticky { position: sticky; top: 100px; align-self: start; }
.why-h2 {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 56px; font-weight: 500;
  margin: 12px 0 20px; color: var(--ink); letter-spacing: -1.5px; line-height: 1.05;
}
.why-h2 .accent { color: var(--accent); font-style: italic; }
.why-intro { font-size: 17px; color: var(--sub); line-height: 1.6; max-width: 400px; }
.why-item {
  padding: 28px 0; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 60px 1fr; gap: 24px; align-items: start;
}
.why-item:first-child { border-top: 1px solid var(--ink); }
.why-item:last-child { border-bottom: 1px solid var(--line); }
.why-n { font-family: 'JetBrains Mono', monospace; font-size: 14px; color: var(--sub); }
.why-t {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 28px; font-weight: 500; color: var(--ink);
  letter-spacing: -0.5px; margin-bottom: 8px;
}
.why-d { font-size: 16px; color: var(--sub); line-height: 1.6; }

/* ---- Certs ---- */
.certs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.cert-list { display: grid; gap: 12px; }
.cert-item {
  background: var(--surface); padding: 16px 20px; border-radius: 10px;
  border: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
}
.cert-name { font-weight: 600; color: var(--ink); font-size: 15px; }
.cert-sub { font-size: 13px; color: var(--sub); margin-top: 2px; }
.cert-check {
  width: 28px; height: 28px; border-radius: 999px;
  background: var(--primary); color: var(--primary-ink);
  display: grid; place-items: center; font-size: 14px; font-weight: 700;
}

.cert-sample {
  background: var(--surface); padding: 32px; border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.1);
}
.cert-sample-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--sub); letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 16px;
}
.cert-sample-card {
  border: 2px solid var(--line); padding: 20px; border-radius: 8px;
  background: linear-gradient(180deg, #FAFAF7 0%, #FFFFFF 100%);
}
.cert-sample-head { text-align: center; border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 16px; }
.cert-sample-head-hi { font-size: 11px; color: var(--sub); letter-spacing: 1px; }
.cert-sample-head-en { font-size: 13px; font-weight: 700; color: var(--ink); margin-top: 2px; }
.cert-sample-head-min { font-size: 9px; color: var(--sub); margin-top: 4px; }
.cert-sample-title { text-align: center; margin-bottom: 16px; }
.cert-sample-title-h { font-family: 'Fraunces', serif; font-size: 22px; color: var(--ink); font-style: italic; }
.cert-sample-title-s { font-size: 11px; color: var(--sub); }
.cert-sample-body { font-size: 12px; color: var(--sub); line-height: 1.7; }
.cert-sample-body strong { color: var(--ink); font-weight: 600; }
.cert-sample-body .placeholder { color: var(--ink); font-weight: 600; border-bottom: 1px dotted var(--sub); }
.cert-sample-foot {
  margin-top: 20px; padding-top: 12px; border-top: 1px dashed var(--line);
  display: flex; justify-content: space-between; font-size: 10px; color: var(--sub);
}
.cert-sample-verify { margin-top: 16px; font-size: 12px; color: var(--sub); text-align: center; }

/* ---- Testimonials ---- */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testi-card {
  background: var(--surface); padding: 32px; border-radius: 12px;
  border: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 20px; min-height: 280px;
}
.testi-quote-mark {
  font-family: 'Fraunces', serif; font-size: 36px; color: var(--accent);
  line-height: 0.5; height: 12px;
}
.testi-quote { font-size: 16px; color: var(--ink); line-height: 1.5; flex: 1; }
.testi-author {
  display: flex; gap: 12px; align-items: center;
  padding-top: 16px; border-top: 1px solid var(--line);
}
.testi-avatar {
  width: 40px; height: 40px; border-radius: 999px;
  background: var(--primary); color: var(--primary-ink);
  display: grid; place-items: center; font-weight: 600; font-size: 15px;
}
.testi-name { font-weight: 600; color: var(--ink); font-size: 14px; }
.testi-meta { font-size: 12px; color: var(--sub); }

/* ---- Admission ---- */
.admission-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.admission-h2 {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 60px; font-weight: 500;
  margin: 12px 0 20px; color: var(--ink); letter-spacing: -1.8px; line-height: 1.05;
}
.admission-h2 .accent { color: var(--accent); font-style: italic; }
.admission-intro { font-size: 17px; color: var(--sub); line-height: 1.6; max-width: 440px; margin-bottom: 28px; }
.admission-contact { display: grid; gap: 14px; font-size: 15px; color: var(--ink); }
.admission-contact-row { display: flex; gap: 12px; }
.admission-contact-icon { color: var(--accent); font-size: 18px; }
.admission-contact-main { font-weight: 600; }
.admission-contact-sub { font-size: 14px; color: var(--sub); }

.admission-form {
  background: var(--surface); padding: 36px; border-radius: 12px;
  border: 1px solid var(--line);
}
.form-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--sub); letter-spacing: 1.5px; text-transform: uppercase;
}
.form-field { display: grid; gap: 8px; }
.form-field-label { font-size: 12px; color: var(--sub); font-weight: 600; letter-spacing: 0.3px; }
.form-input, .form-select {
  width: 100%; padding: 14px 16px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink); font-size: 15px;
  font-family: inherit;
}
.form-select { cursor: pointer; }
.form-grid { display: grid; gap: 18px; }
.form-submit {
  background: var(--primary); color: var(--primary-ink);
  padding: 16px 24px; border-radius: 10px; border: none;
  font-weight: 600; font-size: 16px; cursor: pointer;
  font-family: inherit; margin-top: 8px;
}
.form-note { font-size: 12px; color: var(--sub); text-align: center; }
.form-success { padding: 40px 0; text-align: center; display: none; }
.form-success.is-visible { display: block; }
.form-success-check {
  width: 56px; height: 56px; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; margin: 0 auto 20px; font-size: 28px;
}
.form-success-title {
  font-family: 'Fraunces', 'Noto Serif Devanagari', serif;
  font-size: 28px; color: var(--ink); margin-bottom: 8px;
}
.form-success-sub { color: var(--sub); font-size: 15px; }

/* ---- Call card (admission) ---- */
.call-card { display: flex; flex-direction: column; gap: 12px; }
.call-card-title {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 30px; font-weight: 500; color: var(--ink);
  letter-spacing: -0.6px; line-height: 1.15; margin-top: 4px;
}
.call-card-sub { font-size: 15px; color: var(--sub); line-height: 1.55; margin-bottom: 8px; }
.call-card-actions { display: grid; gap: 10px; }
.call-btn {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border-radius: 10px;
  text-decoration: none; transition: transform 0.15s ease;
}
.call-btn:hover { transform: translateY(-1px); opacity: 1; }
.call-btn-icon { font-size: 22px; flex-shrink: 0; }
.call-btn-label { display: block; font-size: 12px; opacity: 0.85; letter-spacing: 0.3px; }
.call-btn-num { display: block; font-size: 18px; font-weight: 700; letter-spacing: 0.2px; white-space: nowrap; }
.call-btn-primary { background: var(--primary); color: var(--primary-ink); }
.call-btn-wa { background: #1FA855; color: #FFFFFF; }
.call-btn-ghost { background: var(--bg); color: var(--ink); border: 1px solid var(--line); }
.call-btn-ghost .call-btn-num { font-size: 16px; }

/* ---- Footer ---- */
.footer { padding: 48px 56px; background: var(--bg); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-blurb { color: var(--sub); font-size: 14px; margin-top: 16px; line-height: 1.6; max-width: 280px; }
.footer-col-title {
  font-size: 12px; color: var(--ink); font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 14px;
}
.footer-col-items { display: grid; gap: 8px; }
.footer-col-items div { font-size: 14px; color: var(--sub); }
.footer-bottom {
  padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; font-size: 12px; color: var(--sub);
}

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15,18,28,0.55);
  backdrop-filter: blur(4px); z-index: 100;
  display: none; align-items: center; justify-content: center;
  padding: 24px;
}
.modal-backdrop.is-open { display: flex; animation: fadeIn 0.18s ease-out; }
.modal {
  background: var(--surface); border-radius: 8px;
  max-width: 720px; width: 100%; max-height: 90vh; overflow: auto;
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(15,18,28,0.25);
  animation: slideUp 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.modal-header {
  padding: 32px 36px 24px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--surface); z-index: 2;
}
.modal-header-row { display: flex; justify-content: space-between; align-items: start; gap: 16px; }
.modal-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; font-size: 12px; color: var(--sub); }
.modal-meta strong { color: var(--ink); }
.modal-title {
  font-family: 'Fraunces', 'Noto Serif Devanagari', Georgia, serif;
  font-size: 32px; font-weight: 500; color: var(--ink);
  letter-spacing: -0.8px; line-height: 1.1; margin: 0;
}
.modal-close {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  width: 36px; height: 36px; border-radius: 999px; cursor: pointer;
  font-size: 18px; line-height: 1; display: grid; place-items: center;
  flex-shrink: 0;
}
.modal-body { padding: 28px 36px 32px; }
.modal-desc { font-size: 16px; line-height: 1.6; color: var(--sub); margin: 0 0 24px; }
.modal-meta-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: 4px;
  margin-bottom: 28px;
}
.modal-meta-cell { background: var(--bg); padding: 14px 16px; }
.modal-meta-label {
  font-size: 11px; color: var(--sub); letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 4px;
}
.modal-meta-value { font-size: 14px; color: var(--ink); font-weight: 500; }

.modal-section-label {
  font-size: 11px; color: var(--sub); letter-spacing: 1.5px;
  text-transform: uppercase; font-weight: 600; margin-bottom: 12px;
}
.modal-syllabus { margin: 0 0 24px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.modal-syllabus li { display: flex; gap: 12px; font-size: 15px; color: var(--ink); line-height: 1.5; }
.modal-syllabus-n {
  flex-shrink: 0; width: 22px; height: 22px; border-radius: 999px;
  background: var(--chip); color: var(--primary);
  display: grid; place-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 600; margin-top: 1px;
}

.modal-outcome {
  padding: 16px 18px; background: var(--chip); border-radius: 4px;
  border-left: 3px solid var(--primary); margin-bottom: 28px;
}
.modal-outcome-label {
  font-size: 11px; color: var(--primary); letter-spacing: 1.5px;
  text-transform: uppercase; font-weight: 600; margin-bottom: 6px;
}
.modal-outcome-text { font-size: 14px; color: var(--ink); line-height: 1.5; }

.modal-ctas { display: flex; gap: 10px; flex-wrap: wrap; }
.modal-cta-primary {
  background: var(--primary); color: var(--primary-ink);
  padding: 12px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 600; border: none; cursor: pointer;
  font-family: inherit;
}
.modal-cta-secondary {
  background: transparent; color: var(--ink);
  padding: 12px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 500;
  border: 1px solid var(--line);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* =============== Responsive =============== */

@media (max-width: 960px) {
  .nav { padding: 16px 24px; }
  .section, .hero, .combos, .footer { padding-left: 24px; padding-right: 24px; }
  .hero { padding-top: 48px; }
  .section { padding-top: 64px; padding-bottom: 64px; }
  .combos { padding-top: 64px; padding-bottom: 64px; }

  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-image { aspect-ratio: 16/10; }
  .combos-header { grid-template-columns: 1fr; gap: 24px; }
  .combos-grid { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 36px; }
  .why-sticky { position: static; }
  .certs-grid { grid-template-columns: 1fr; gap: 36px; }
  .testi-grid { grid-template-columns: 1fr; }
  .admission-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  .section-header { flex-direction: column; align-items: start; }
  .section-aside { text-align: left; max-width: none; }

  .section-h2, .why-h2 { font-size: 44px; }
  .combos-h2, .admission-h2 { font-size: 48px; }
}

@media (max-width: 640px) {
  .nav { padding: 14px 20px; }
  .nav-links { display: none; }
  .nav-cta { padding: 8px 14px; font-size: 13px; }

  .hero { padding: 36px 20px 0; }
  .section, .combos, .footer { padding-left: 20px; padding-right: 20px; }
  .section, .combos { padding-top: 56px; padding-bottom: 56px; }
  .footer { padding-top: 36px; padding-bottom: 36px; }

  .hero-h1 { font-size: 38px; line-height: 1.1; letter-spacing: -1.2px; }
  .section-h2, .why-h2, .combos-h2, .admission-h2 { font-size: 32px; letter-spacing: -1px; line-height: 1.1; }

  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .hero-stat-n { font-size: 28px; }

  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn-primary, .hero-ctas .btn-secondary { text-align: center; }

  .course-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .admission-form { padding: 24px; }

  .modal-header { padding: 24px 24px 20px; }
  .modal-body { padding: 20px 24px 24px; }
  .modal-title { font-size: 26px; }
  .modal-meta-grid { grid-template-columns: 1fr; }
}

/* ---- Tweaks panel ---- */
.tweaks-toggle {
  position: fixed; bottom: 20px; right: 20px; z-index: 50;
  background: var(--ink); color: var(--bg);
  border: none; border-radius: 999px;
  padding: 12px 18px; font-size: 13px; font-weight: 600;
  cursor: pointer; box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  font-family: inherit;
}
.tweaks-panel {
  position: fixed; bottom: 80px; right: 20px; z-index: 50;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px; width: 280px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
  display: none;
}
.tweaks-panel.is-open { display: block; }
.tweaks-title { font-weight: 700; font-size: 14px; margin-bottom: 4px; color: var(--ink); }
.tweaks-sub { font-size: 12px; color: var(--sub); margin-bottom: 16px; }
.tweaks-group { margin-bottom: 16px; }
.tweaks-group-label {
  font-size: 11px; color: var(--sub); letter-spacing: 1px;
  text-transform: uppercase; font-weight: 600; margin-bottom: 8px;
}
.tweaks-options { display: grid; gap: 6px; }
.tweaks-option {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); cursor: pointer; font-size: 13px;
  color: var(--ink); font-family: inherit; text-align: left;
}
.tweaks-option:hover { background: var(--chip); }
.tweaks-option.is-active { border-color: var(--primary); background: var(--chip); color: var(--primary); font-weight: 600; }
.tweaks-swatch { width: 16px; height: 16px; border-radius: 999px; flex-shrink: 0; }