/*
  Aurelia University Design System
  – Modern, immersive UI with elegant typography, glass surfaces, and gradient energy
*/

/* CSS Variables */
:root {
  --brand: #3a66ff;
  --brand-2: #a855f7;
  --brand-3: #00d4ff;
  --bg: #0b1020;
  --bg-elev: #101634;
  --text: #e9ecf8;
  --text-muted: #a8b0ca;
  --surface: rgba(255, 255, 255, 0.06);
  --outline: rgba(255, 255, 255, 0.15);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --radius-lg: 22px;
  --container: min(1120px, 92vw);
  --grad: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 50%, var(--brand-3) 100%);
}

html[data-theme="light"] {
  --bg: #f7f8ff;
  --bg-elev: #ffffff;
  --text: #0c1021;
  --text-muted: #2d3552;
  --surface: rgba(14, 22, 56, 0.06);
  --outline: rgba(14, 22, 56, 0.12);
}

/* Base Reset */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, 'Helvetica Neue', Arial, 'Noto Sans', 'Apple Color Emoji', 'Segoe UI Emoji';
  line-height: 1.6;
}

/* Smooth theme transitions */
@media (prefers-reduced-motion: no-preference) {
  html.theme-transition,
  html.theme-transition * {
    transition: background-color .35s ease, color .35s ease,
                border-color .35s ease, box-shadow .35s ease,
                fill .35s ease, stroke .35s ease;
  }
}

.container { width: var(--container); margin: 0 auto; }

/* Progress bar */
.progress {
  position: fixed; inset: 0 auto auto 0; height: 3px; width: 0%;
  background: var(--grad); z-index: 1000; box-shadow: var(--shadow);
}

/* Header */
.site-header { position: sticky; top: 0; z-index: 999; backdrop-filter: saturate(140%) blur(8px); background: linear-gradient(180deg, rgba(10, 14, 33, 0.7), rgba(10, 14, 33, 0.15) 60%, transparent); }
.site-nav { display: flex; align-items: center; gap: 16px; padding: 18px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; font-weight: 700; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--grad); color: white; font-weight: 800; box-shadow: var(--shadow); }
.brand-text { letter-spacing: 0.2px; }

.nav-links { list-style: none; display: flex; gap: 18px; margin: 0; padding: 0; }
.nav-links a { color: var(--text); text-decoration: none; opacity: 0.9; padding: 8px 10px; border-radius: 10px; }
.nav-links a:hover { background: var(--surface); opacity: 1; }

.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.nav-toggle { display: none; background: transparent; border: 0; width: 42px; height: 42px; border-radius: 10px; color: var(--text); position: relative; }
.nav-toggle span { position: absolute; left: 10px; right: 10px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .3s, top .3s, opacity .3s; }
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 16px; border-radius: 12px; text-decoration: none; border: 1px solid var(--outline); color: var(--text); background: var(--surface); transition: transform .15s ease, background .2s ease, box-shadow .2s; box-shadow: 0 2px 10px rgba(0,0,0,0.12); }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary { background: var(--grad); color: #fff; border-color: transparent; }
.btn-ghost { background: transparent; border-color: var(--outline); }

.theme-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--outline); background: var(--surface); color: var(--text); }
.theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Hero */
.hero { position: relative; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; padding: 48px 0 64px; }
.eyebrow { font-weight: 700; color: var(--brand); letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; }
.headline { font-family: 'Playfair Display', serif; font-weight: 700; font-size: clamp(36px, 6vw, 64px); line-height: 1.06; margin: 10px 0 16px; }
.headline .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.subhead { color: var(--text-muted); font-size: 18px; margin-bottom: 20px; }
.hero-ctas { display: flex; gap: 12px; margin: 12px 0 22px; flex-wrap: wrap; }
.badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge { padding: 8px 12px; border-radius: 999px; border: 1px dashed var(--outline); background: rgba(255,255,255,0.04); font-size: 12px; color: var(--text-muted); }

.hero-art { position: relative; height: clamp(320px, 40vw, 520px); border-radius: var(--radius-lg); overflow: hidden; background: radial-gradient(120% 80% at 50% -20%, rgba(58,102,255,0.22), transparent 76%), linear-gradient(180deg, rgba(168,85,247,0.10), transparent 60%), var(--bg-elev); border: 1px solid var(--outline); box-shadow: var(--shadow); }
.hero-image { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 80%; height: 80%; border-radius: 12px; overflow: hidden; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.hero-image img { width: 100%; height: 100%; object-fit: cover; }
.grid-veil { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px); background-size: 36px 36px; mask-image: radial-gradient(80% 80% at 50% 50%, black, transparent 85%); }
.orb { position: absolute; filter: blur(60px); opacity: 0.4; }
.orb-1 { left: 8%; top: 12%; width: 180px; height: 180px; background: radial-gradient(circle at 30% 30%, #6a8bff, transparent 60%); }
.orb-2 { right: 8%; bottom: 16%; width: 260px; height: 260px; background: radial-gradient(circle at 60% 60%, #a855f7, transparent 60%); }
.orb-3 { left: 42%; bottom: 6%; width: 200px; height: 200px; background: radial-gradient(circle at 70% 40%, #00d4ff, transparent 60%); }

/* Sections */
.section-head h2 { font-family: 'Playfair Display', serif; font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 6px; }
.section-head p { margin: 0; color: var(--text-muted); }

.highlights { padding: 18px 0 16px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 16px; }
.card { background: var(--bg-elev); border: 1px solid var(--outline); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transform-style: preserve-3d; will-change: transform; }
.card-media { height: 180px; background: center/cover no-repeat; }
.grad-a { background: linear-gradient(135deg, #1e3a8a, #3b82f6); }
.grad-b { background: linear-gradient(135deg, #6d28d9, #a855f7); }
.grad-c { background: linear-gradient(135deg, #0ea5e9, #06b6d4); }
.card-body { padding: 14px; }
.card-body h3 { margin: 6px 0 8px; font-size: 20px; }
.card-body p { margin: 0 0 8px; color: var(--text-muted); }
.card-link { color: var(--text); text-decoration: none; font-weight: 600; }

.programs { padding: 18px 0 12px; }
.programs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 12px; }
.program-card { display: block; border-radius: var(--radius); padding: 14px; border: 1px solid var(--outline); background: linear-gradient(180deg, rgba(255,255,255,0.04), transparent 60%); text-decoration: none; color: inherit; box-shadow: var(--shadow); min-height: 140px; position: relative; overflow: hidden; }
.program-card .tag { position: absolute; top: 12px; right: 12px; font-size: 11px; font-weight: 700; padding: 6px 10px; border-radius: 999px; background: var(--surface); border: 1px solid var(--outline); }
.program-card h3 { margin: 10px 0 6px; }
.program-card p { margin: 0; color: var(--text-muted); }

.research-slice { padding: 12px 0; }
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 12px; }
.research-card { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--outline); background: var(--bg-elev); box-shadow: var(--shadow); }
.research-card .media { height: 180px; background: center/cover no-repeat; background-image: var(--img); }
.research-card .body { padding: 12px; }
.research-card h3 { margin: 8px 0 6px; font-size: 18px; }
.research-card p { margin: 0; color: var(--text-muted); font-size: 14px; }

.cta-band { padding: 16px 0 48px; }
.cta-card { border-radius: var(--radius-lg); border: 1px solid var(--outline); background: linear-gradient(180deg, rgba(58,102,255,0.15), rgba(168,85,247,0.12)); padding: 22px; box-shadow: var(--shadow); }
.cta-card .actions { margin-top: 8px; display: flex; gap: 12px; flex-wrap: wrap; }

/* Forms */
.form-card { border-radius: var(--radius-lg); border: 1px solid var(--outline); background: var(--bg-elev); padding: 18px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.input { display: flex; flex-direction: column; gap: 6px; }
.input label { font-weight: 600; font-size: 14px; }
.input input, .input select, .input textarea { padding: 10px 12px; border-radius: 12px; border: 1px solid var(--outline); background: var(--surface); color: var(--text); }
.input textarea { min-height: 90px; resize: vertical; }
.form-actions { margin-top: 12px; display: flex; gap: 10px; }

/* Footer */
.site-footer { padding: 26px 0 40px; background: linear-gradient(180deg, transparent, rgba(0,0,0,0.25)); border-top: 1px solid var(--outline); margin-top: 24px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1.2fr; gap: 16px; }
.footer-col h4 { margin: 0 0 8px; }
.footer-col a { display: block; margin: 6px 0; color: var(--text-muted); text-decoration: none; }
.footer-col a:hover { color: var(--text); }
.newsletter { display: flex; gap: 8px; }
.newsletter input { flex: 1; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--outline); background: var(--surface); color: var(--text); }

/* Reveal animations */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Tilt effect base */
.tilt { transition: transform .12s ease-out, box-shadow .2s ease; }
.tilt:hover { box-shadow: 0 20px 50px rgba(0,0,0,0.35); }

/* Responsive */
@media (max-width: 1000px) {
  .hero { grid-template-columns: 1fr; gap: 24px; }
  .hero-art { order: -1; height: 300px; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .programs-grid { grid-template-columns: 1fr 1fr; }
  .research-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  /* Container adjustments */
  .container { width: 94vw; }
  
  /* Header & Navigation */
  .site-nav { padding: 12px 0; gap: 12px; }
  .brand-mark { width: 32px; height: 32px; font-size: 14px; }
  .brand-text { font-size: 14px; }
  .nav-toggle { display: inline-block; width: 38px; height: 38px; }
  .nav-toggle span { left: 8px; right: 8px; }
  .nav-toggle span:nth-child(1) { top: 12px; }
  .nav-toggle span:nth-child(2) { top: 18px; }
  .nav-toggle span:nth-child(3) { top: 24px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 18px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 18px; }
  
  .nav-links { 
    position: fixed; 
    inset: 58px 12px auto 12px; 
    background: var(--bg-elev); 
    border: 1px solid var(--outline); 
    border-radius: 16px; 
    padding: 16px; 
    display: grid; 
    gap: 8px; 
    transform: translateY(-8px); 
    opacity: 0; 
    pointer-events: none; 
    transition: transform .25s, opacity .25s; 
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
  }
  .nav-links.show { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 16px; text-align: center; font-weight: 500; }
  
  .nav-cta { gap: 8px; }
  .theme-toggle { width: 38px; height: 38px; }
  .btn { padding: 10px 14px; font-size: 14px; }
  
  /* Hero Section */
  .hero { padding: 24px 0 40px; gap: 20px; }
  .eyebrow { font-size: 11px; }
  .headline { font-size: clamp(32px, 8vw, 48px); margin: 8px 0 12px; }
  .subhead { font-size: 16px; margin-bottom: 16px; }
  .hero-ctas { gap: 10px; margin: 10px 0 16px; }
  .hero-ctas .btn { padding: 12px 16px; }
  
  .hero-art { height: 280px; }
  .hero-image { width: 85%; height: 75%; }
  
  /* Cards & Grids */
  .card-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 12px; }
  .card-media { height: 160px; }
  .card-body { padding: 12px; }
  .card-body h3 { font-size: 18px; margin: 4px 0 6px; }
  .card-body p { font-size: 14px; margin: 0 0 6px; }
  
  .programs-grid, .research-grid { 
    grid-template-columns: 1fr; 
    gap: 10px; 
    margin-top: 10px; 
  }
  .program-card { 
    padding: 12px; 
    min-height: 110px; 
  }
  .program-card h3 { font-size: 16px; margin: 8px 0 4px; }
  .program-card p { font-size: 13px; }
  
  .research-card .media { height: 140px; }
  .research-card .body { padding: 10px; }
  .research-card h3 { font-size: 16px; margin: 6px 0 4px; }
  .research-card p { font-size: 13px; }
  
  /* Sections */
  .section-head h2 { font-size: clamp(24px, 6vw, 32px); margin: 0 0 4px; }
  .section-head p { font-size: 14px; }
  .highlights, .programs, .research-slice { padding: 12px 0 8px; }
  
  /* CTA */
  .cta-band { padding: 12px 0 32px; }
  .cta-card { padding: 18px; }
  .cta-card h3 { font-size: 18px; }
  .cta-card p { font-size: 14px; }
  .cta-card .actions { gap: 10px; }
  
  /* Forms */
  .form-card { padding: 16px; }
  .form-grid { grid-template-columns: 1fr; gap: 10px; }
  .input input, .input select, .input textarea { 
    padding: 12px 14px; 
    font-size: 14px; 
  }
  .input textarea { min-height: 80px; }
  .form-actions { gap: 8px; }
  
  /* Footer */
  .site-footer { padding: 20px 0 32px; }
  .footer-grid { 
    grid-template-columns: 1fr; 
    gap: 20px; 
    text-align: center; 
  }
  .footer-col h4 { font-size: 16px; margin: 0 0 10px; }
  .footer-col a { font-size: 14px; margin: 8px 0; }
  .newsletter { flex-direction: column; gap: 10px; }
  .newsletter input { padding: 12px 14px; }
  
  /* Buttons */
  .btn { font-size: 14px; }
  .badges { gap: 8px; }
  .badge { padding: 6px 10px; font-size: 11px; }
}

/* Small phones */
@media (max-width: 480px) {
  .container { width: 96vw; }
  
  /* Header */
  .site-nav { padding: 10px 0; }
  .brand-mark { width: 28px; height: 28px; font-size: 12px; }
  .brand-text { font-size: 13px; }
  .nav-toggle { width: 34px; height: 34px; }
  .nav-toggle span { left: 6px; right: 6px; }
  .nav-toggle span:nth-child(1) { top: 10px; }
  .nav-toggle span:nth-child(2) { top: 16px; }
  .nav-toggle span:nth-child(3) { top: 22px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 16px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 16px; }
  
  .nav-links { 
    inset: 52px 8px auto 8px; 
    padding: 12px; 
    gap: 6px; 
  }
  .nav-links a { padding: 10px 12px; font-size: 14px; }
  
  .theme-toggle { width: 34px; height: 34px; }
  .btn { padding: 8px 12px; font-size: 13px; }
  
  /* Hero */
  .hero { padding: 20px 0 32px; }
  .eyebrow { font-size: 10px; }
  .headline { font-size: clamp(28px, 9vw, 36px); margin: 6px 0 10px; }
  .subhead { font-size: 15px; margin-bottom: 14px; }
  .hero-ctas { gap: 8px; margin: 8px 0 12px; }
  .hero-ctas .btn { padding: 10px 14px; }
  
  .hero-art { height: 220px; }
  .hero-image { width: 90%; height: 70%; }
  
  /* Cards */
  .card-grid { gap: 10px; margin-top: 10px; }
  .card-media { height: 140px; }
  .card-body { padding: 10px; }
  .card-body h3 { font-size: 16px; margin: 3px 0 5px; }
  .card-body p { font-size: 13px; margin: 0 0 5px; }
  
  .programs-grid, .research-grid { gap: 8px; margin-top: 8px; }
  .program-card { padding: 10px; min-height: 100px; }
  .program-card h3 { font-size: 15px; margin: 6px 0 3px; }
  .program-card p { font-size: 12px; }
  .program-card .tag { font-size: 10px; padding: 4px 8px; }
  
  .research-card .media { height: 120px; }
  .research-card .body { padding: 8px; }
  .research-card h3 { font-size: 15px; margin: 5px 0 3px; }
  .research-card p { font-size: 12px; }
  
  /* Sections */
  .section-head h2 { font-size: clamp(22px, 7vw, 28px); margin: 0 0 3px; }
  .section-head p { font-size: 13px; }
  .highlights, .programs, .research-slice { padding: 10px 0 6px; }
  
  /* CTA */
  .cta-band { padding: 10px 0 24px; }
  .cta-card { padding: 16px; }
  .cta-card h3 { font-size: 16px; }
  .cta-card p { font-size: 13px; }
  .cta-card .actions { gap: 8px; }
  
  /* Forms */
  .form-card { padding: 14px; }
  .form-grid { gap: 8px; }
  .input input, .input select, .input textarea { 
    padding: 10px 12px; 
    font-size: 13px; 
  }
  .input textarea { min-height: 70px; }
  .input label { font-size: 13px; }
  
  /* Footer */
  .site-footer { padding: 16px 0 24px; }
  .footer-grid { gap: 16px; }
  .footer-col h4 { font-size: 15px; margin: 0 0 8px; }
  .footer-col a { font-size: 13px; margin: 6px 0; }
  .newsletter input { padding: 10px 12px; font-size: 13px; }
  
  /* Buttons */
  .btn { font-size: 13px; }
  .badge { padding: 5px 8px; font-size: 10px; }
}

/* Extra small phones */
@media (max-width: 360px) {
  .container { width: 98vw; }
  
  .headline { font-size: clamp(24px, 10vw, 32px); }
  .subhead { font-size: 14px; }
  
  .hero-art { height: 200px; }
  .hero-image { width: 92%; height: 65%; }
  
  .card-media { height: 120px; }
  .program-card { min-height: 90px; }
  .research-card .media { height: 100px; }
  
  .btn { padding: 7px 10px; font-size: 12px; }
  .nav-links a { padding: 8px 10px; font-size: 13px; }
}