/* ==================================================
   Index Stylesheet
   - Variables & Themes
   - Base / Typography / Accessibility
   - Layout (Header, Main, Sections)
   - Components (Controls, Cards, Grids)
   - Variants (Card color themes)
   - Helpers / Lists / Footer
   - Responsive
   ================================================== */

/* =============== Variables & Themes =============== */
:root {
  --bg: #f7fafd;
  --card-bg: #fff;
  --text: #222;
  --accent: #1976d2;
  --accent2: #546e7a;
  --shadow: 0 4px 16px rgba(25,118,210,.08);
  --radius: 14px;
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --focus-ring: 0 0 0 3px rgba(25,118,210,.35);
  --header-h: 56px;      /* will be updated by JS */
  --breadcrumbs-h: 0px;  /* will be updated by JS */
}
[data-theme="dark"] {
  --bg: #181c23;
  --card-bg: #232a34;
  --text: #f1f1f1;
  --accent: #1976d2;
  --accent2: #a3a3a3;
  --shadow: 0 4px 16px rgba(25,118,210,.18);
  --focus-ring: 0 0 0 3px rgba(144,202,249,.45);
}

/* Hint for UA (improves form controls in dark mode) */
:root { color-scheme: light dark; }

/* =============== Base & Typography =============== */
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI','Roboto',Arial,sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: .5rem 1rem;
  background: #000;
  color: #fff;
  z-index: 10000;
  border-radius: 6px;
  box-shadow: var(--focus-ring);
}

/* Links */
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 6px; }

/* Headings */
h1 {
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: 1px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 0; /* ensure consistency */
}
section h2 {
  margin: 0 0 .5rem;
  color: var(--accent2);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
  gap: .5rem;
}

/* ================= Layout ================= */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  border-radius: 0 0 var(--radius) var(--radius);
  margin: 0 0 1rem;
}

.has-sticky main { padding-top: calc(var(--header-h) + var(--breadcrumbs-h) + 8px); }

/* ============== Global site header (sticky) ============== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: grid;
  grid-template-columns: auto 1fr auto; /* brand | nav centered | controls right */
  align-items: center;
  gap: .75rem 1rem;
  padding: .6rem .8rem;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}
.site-header .brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  color: var(--accent);
}
.site-header .brand img { width: 28px; height: 28px; border-radius: 6px; }
.site-header .nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #bdbdbd;
  padding: .4rem .6rem;
  border-radius: 8px;
  color: var(--text);
  line-height: 1;
}
.site-header .nav-toggle i { color: inherit; }
.site-header .nav-toggle:hover { background: rgba(0,0,0,.06); }
.site-header .nav-toggle:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.site-header nav { display: flex; gap: .5rem; justify-content: center; align-items: center; flex-wrap: nowrap; min-width: 0; }
.site-header nav a {
  padding: .4rem .7rem;
  border-radius: 8px;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.site-header nav a.active,
.site-header nav a:focus-visible { box-shadow: var(--focus-ring); }

/* Controls live on header right (desktop) and inside nav (mobile) */
.site-header .header-controls { display: flex; gap: .5rem; align-items: center; justify-content: flex-end; }
.site-header .header-controls #search {
  min-width: 140px;
  width: 18vw;
  max-width: 260px;
  padding: .5rem .8rem;
}
.site-header .header-controls .btn-login{display:inline-flex;align-items:center;gap:.45rem;padding:.45rem .7rem;border-radius:999px;background:var(--accent);color:#fff;border:0;white-space:nowrap}
.site-header .header-controls .btn-login i{color:inherit}
.site-header nav .controls { display: none; gap: .5rem; align-items: center; }
.site-header nav .controls #search { min-width: 140px; width: 100%; max-width: 100%; }

@media (max-width: 800px) {
  .site-header { grid-template-columns: auto 1fr; }
  .site-header nav { display: none; position: absolute; left: 0; right: 0; top: calc(var(--header-h)); background: var(--card-bg); padding: .5rem; box-shadow: var(--shadow); }
  .site-header nav.open { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
  .site-header nav.open a { display: block; padding: .6rem .7rem; }
  .site-header .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  /* Mobile: hide header-right controls, show controls inside burger */
  .site-header .header-controls { display: none; }
  .site-header nav.open .controls { display: grid; grid-template-columns: 1fr auto; gap: .5rem; grid-column: 1 / -1; margin-top: .25rem; min-width: 0; align-items: center; }
  .site-header nav.open .controls #search { width: 100%; max-width: 100%; box-sizing: border-box; min-width: 0; }
  .site-header nav.open .controls #theme-toggle { white-space: nowrap; }
  .site-header nav.open .controls .btn-login{justify-self:end}
}
/* Keep original filled button style for theme toggle (desktop and mobile) */

/* ============== Breadcrumbs ============== */
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; font-size: .95rem; color: var(--accent2); padding: .4rem 1rem 0; }
.breadcrumbs a { color: inherit; text-decoration: underline; }
.breadcrumbs .sep { opacity: .6; }
main {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(320px,1fr));
  gap: 2rem;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
section {
  background: var(--card-bg);
  padding: 1.5rem 1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
  min-width: 0; /* fix overflow in grid */
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ================ Controls ================= */
#controls { display: flex; gap: 1rem; align-items: center; }
#search {
  padding: .6rem 1rem;
  border: 1px solid #bdbdbd;
  border-radius: var(--radius);
  font-size: 1rem;
  outline: none;
  background: var(--bg);
  color: var(--text);
  transition: border .2s;
}
#search:focus { border-color: var(--accent); }
#search:focus-visible { box-shadow: var(--focus-ring); }
#theme-toggle {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: .6rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  transition: background var(--transition), transform .2s;
}
#theme-toggle:hover { background: var(--accent2); }
#theme-toggle:active { transform: scale(.95); }
#theme-toggle:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* ================ Grid & Cards ================ */
.grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(120px,1fr)); gap: 1rem; }
.card {
  background: var(--accent);
  color: #fff;
  text-align: center;
  padding: 1.2rem .5rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(25,118,210,.10);
  transition: transform .18s, box-shadow .18s, background .18s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  min-height: 90px;
  border: none;
  outline: none;
  position: relative;
  text-decoration: none;
  will-change: transform;
}
.card i { font-size: 1.6rem; margin-bottom: .2rem; }
.card:hover,
.card:focus { transform: translateY(-4px) scale(1.04); box-shadow: 0 8px 24px rgba(25,118,210,.18); background: var(--accent2); z-index: 1; }
.card:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(255,255,255,.65), var(--focus-ring); }

/* ============== Card Color Variants ============== */
/* Could be converted to CSS variables map if needed */
.bio    { background: #8bc34a; }
.info   { background: #0288d1; }
.gea    { background: #e91e63; }
.tc     { background: #d81b60; }
.gim    { background: #546e7a; }
.gtei   { background: #f57c00; }
.geii   { background: #7c4dff; }
.gaco   { background: #00bcd4; }
.tools .card    { background: #455a64; }
.tools .moodle  { background: #ffeb3b; color: #333; }
.tools .webmail { background: #000; }
.tools .gmail   { background: #00700a; }

/* ================= Helpers & Footer ================ */
ul { padding-left: 1.2rem; margin: 0; }
li { margin: 0 0 .3rem; }
footer {
  text-align: center;
  padding: 1.2rem 0 .7rem;
  color: #888;
  font-size: .95rem;
  background: none;
  margin-top: auto;
}
.github { color: #546e7a; }

/* ================ Reduced Motion ================ */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .card:hover, .card:focus { transform: none; }
}

/* ================= Responsive ================= */
@media (max-width: 900px) {
  main { padding: .1rem; gap: 1rem; }
  section { padding: 1rem .5rem; }
  .grid { gap: .7rem; }
  h1 { font-size: 1.5rem; }
}
@media (max-width: 600px) {
  header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    align-items: flex-start;
  }
  main { grid-template-columns: 1fr; padding: .1rem; gap: .7rem; }
  section { padding: .7rem .3rem; }
  .grid { grid-template-columns: 1fr 1fr; gap: .7rem; justify-items: center; }
  .card { width: 95%; font-size: 1rem; padding: 1rem .3rem; min-height: 70px; }
  #controls { width: 100%; flex-wrap: wrap; justify-content: flex-start; }
  h1 { font-size: 1.2rem; }
}

/* Info popup styles */
#info-popup {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  background: var(--card-bg);
  color: var(--text);
  box-shadow: 0 8px 32px rgba(25,118,210,.18), var(--shadow);
  border-radius: 18px;
  padding: 1.2rem 2.2rem 1.2rem 1.2rem;
  font-size: 1rem;
  min-width: 320px;
  max-width: 90vw;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
  transform: translateY(30px) scale(.98);
  border: 1px solid #e3eaf5;
  will-change: transform, opacity;
  word-break: break-word;
}
#info-popup.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}
#info-popup .popup-content {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
#info-popup i.fa-info-circle {
  font-size: 2rem;
  color: var(--accent);
  margin-top: 2px;
}
#info-popup h3 {
  font-size: 1.1rem;
  margin: 0 0 .3rem 0;
  color: var(--accent2);
}
#info-popup p {
  margin: 0;
  font-size: .98rem;
  color: var(--text);
}
#popup-close {
  background: none;
  border: none;
  color: #888;
  font-size: 1.3rem;
  cursor: pointer;
  position: absolute;
  top: .7rem;
  right: 1rem;
  padding: .2rem;
  border-radius: 50%;
  transition: background .2s;
  z-index: 1;
}
#popup-close:hover {
  background: #f0f4fa;
  color: var(--accent);
}
@media (max-width: 600px) {
  /* Mobile: small toast at top */
  #info-popup {
    top: calc(env(safe-area-inset-top, 0) + 12px);
    bottom: auto;
    left: 50%;
    right: auto;
    transform: translate(-50%, -10px);
    width: 75vw;
    max-width: 98vw;
    min-width: 0;
    padding: .8rem 2.4rem .8rem .9rem;
    border-radius: 12px;
    gap: .6rem;
  }
  #info-popup.show { transform: translate(-50%, 0); }
  #info-popup .popup-content {
    flex-direction: row;
    align-items: center;
    gap: .6rem;
  }
  #info-popup .popup-content i.fa-info-circle { font-size: 1.2rem; margin-top: 0; }
  #info-popup h3 { font-size: 1rem; }
  #info-popup p { font-size: .95rem; line-height: 1.35; }
  #popup-close {
    top: .45rem;
    right: .6rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: transparent;
  }
}