/* ========================================================
   StuPort - style.css
   Modern, responsive, accessible styles for StuPort (student portal)
   Customize colors inside :root variables
   ======================================================== */

/* ---------- Theme variables (easy to customize) ---------- */
:root{
  /* Colors */
  --bg: #f6f7fb;           /* page background */
  --surface: #ffffff;      /* cards, panels */
  --primary: #0b63d6;      /* primary brand color */
  --accent: #0ea5a4;       /* secondary/accent color */
  --text: #0f1724;         /* main text */
  --muted: #6b7280;        /* secondary text */
  --danger: #ef4444;       /* error/important */

  /* Sizing */
  --max-width: 1200px;
  --container-pad: 1rem;
  --radius: 12px;
  --card-radius: 10px;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --font-base-size: 16px;
  --line-height: 1.6;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(16,24,40,0.05);
  --shadow-md: 0 4px 18px rgba(15,23,42,0.08);
  --shadow-lg: 0 10px 30px rgba(15,23,42,0.12);
}

/* ---------- Global reset & base ---------- */
* { box-sizing: border-box; }
html { font-size: var(--font-base-size); -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale; }
body{
  margin:0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: var(--line-height);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* ---------- Layout helpers ---------- */
.container{
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* Simple utility classes */
.text-muted { color: var(--muted); }
.lead { font-size: 1.125rem; color: var(--muted); margin-top: 0.25rem; }

/* ---------- Header / Navigation ---------- */
.header {
  background: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.4));
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 1rem;
  padding: 0.75rem var(--container-pad);
}
.brand {
  display:flex;
  align-items:center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
}
.brand h1 {
  margin:0;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}
.nav {
  display:flex;
  gap: 0.75rem;
  align-items:center;
}
.nav a {
  text-decoration:none;
  color: var(--text);
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  font-weight: 500;
}
.nav a:hover,
.nav a:focus {
  background: rgba(11,99,214,0.06);
  outline: none;
}
.nav .active {
  color: var(--primary);
  font-weight: 600;
}

/* Mobile nav toggle (hidden by default — no JS here; style only) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1rem;
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-xl) 0;
}
.hero-grid {
  display:grid;
  gap: var(--space-lg);
  align-items: center;
  grid-template-columns: 1fr;
}
.hero-title {
  font-size: 1.75rem;
  line-height: 1.05;
  margin: 0 0 var(--space-sm) 0;
}
.hero-sub {
  margin: 0 0 var(--space-md) 0;
  color: var(--muted);
}
.hero-cta {
  display:flex;
  gap: 0.75rem;
  flex-wrap:wrap;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-grid;
  place-items:center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration:none;
  font-weight:600;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:focus { outline: 3px solid rgba(11,99,214,0.15); outline-offset: 2px; }
.btn-primary{
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(11,99,214,0.12);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost{
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(15,23,42,0.06);
}
.btn-small { padding: 0.35rem 0.6rem; font-size: 0.95rem; }

/* ---------- Features / Cards / Grid ---------- */
.grid {
  display:grid;
  gap: var(--space-md);
}
.grid-3 {
  grid-template-columns: 1fr;
}
.card {
  background: var(--surface);
  border-radius: var(--card-radius);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
}
.card h3 { margin-top: 0; margin-bottom: 0.5rem; }
.card p { margin: 0; color: var(--muted); }

/* Feature list with icons (icons would be inline SVGs or text) */
.features {
  display:grid;
  gap: var(--space-md);
}
.feature-item {
  display:flex;
  gap: 0.75rem;
  align-items:flex-start;
}

/* ---------- Student section / dashboard helpers ---------- */
.panel-row {
  display:flex;
  gap: var(--space-md);
  flex-direction: column;
}
.sidebar {
  background: var(--surface);
  padding: var(--space-md);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-sm);
}
.main {
  background: transparent;
}

/* Notices */
.notice {
  border-left: 4px solid var(--accent);
  padding: 0.75rem;
  background: linear-gradient(90deg, rgba(14,165,164,0.03), transparent);
  border-radius:8px;
  color: var(--text);
}

/* Tables (for timetables / grade lists) */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.table th, .table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(15,23,42,0.04);
}
.table th { background: rgba(15,23,42,0.02); font-weight:600; color: var(--muted); }
.table tr:last-child td { border-bottom: none; }

/* Search / input basics (simple HTML inputs) */
.input, input[type="text"], input[type="search"], textarea, select {
  width:100%;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid rgba(15,23,42,0.06);
  background: #fff;
  font: inherit;
}
.input:focus, input:focus, textarea:focus, select:focus {
  outline: 3px solid rgba(14,165,164,0.12);
  border-color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
  color: var(--muted);
  font-size: 0.95rem;
  border-top: 1px solid rgba(15,23,42,0.04);
}
.site-footer .footer-inner {
  display:flex;
  gap: var(--space-md);
  align-items:flex-start;
  justify-content:space-between;
  flex-wrap:wrap;
}

/* ---------- Misc / small helpers ---------- */
.kicker { font-size: 0.85rem; font-weight:600; color: var(--accent); text-transform:uppercase; letter-spacing:0.08em; }
.badge {
  display:inline-block;
  padding: 0.2rem 0.45rem;
  border-radius: 999px;
  background: rgba(11,99,214,0.08);
  color: var(--primary);
  font-weight:700;
  font-size: 0.85rem;
}

/* accessibility: visible focus for keyboard users */
:focus { outline-offset: 3px; }

/* ---------- Responsive breakpoints ---------- */
@media (min-width: 640px) {
  .hero-title { font-size: 2rem; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .panel-row { flex-direction: row; }
}

@media (min-width: 768px) {
  .hero-grid { grid-template-columns: 1fr 480px; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .nav-toggle { display: none; }
  .nav { gap: 1rem; }
}

@media (min-width: 1200px) {
  .hero { padding: calc(var(--space-xl) + 1rem) 0; }
  .hero-title { font-size: 2.6rem; }
  .container { padding-left: 2rem; padding-right: 2rem; }
}

/* ---------- Small print: how to adapt ---------- */
/*
 - Change colors quickly in :root variables at top.
 - To make primary darker/lighter, change --primary and adjust --accent accordingly.
 - To reduce radius: lower --radius and --card-radius.
 - Add a "dark mode" ruleset by overriding variables under a .dark selector or @media(prefers-color-scheme: dark).
 - If you add a top navigation with many links, consider collapsing into a hamburger for small screens (requires small JS).
*/