/*************************************************************************
 * AMD brand theme layer for the "front-door" pages (index, bootcamp,
 * robotics-competition, schedule, teams, Trainings, faq, getting-started).
 *
 * Loaded AFTER frame.css/controls.css/custom.css so it can override them
 * without editing the shared framework those files provide to every page
 * on the site (including the curriculum/notebook-embed pages this theme
 * intentionally does not touch). Pulls the AMD red already used for the
 * nav logo (rgb(215, 17, 17)) out to every other accent that was
 * previously a generic blue, and adds a few reusable components
 * (hero banners, card grids) built from the existing flex-row/flex-column
 * primitives in frame.css -- no new layout system, just new looks.
 *************************************************************************/

:root {
  --amd-red: #d71111;
  --amd-red-dark: #a10d0d;
  --amd-black: #1d1a1a;
  --amd-gray: #666666;
  --amd-gray-light: #f4f4f4;
}

/* ---- Sitewide accent: red instead of the generic blue ---- */
.content p a,
.content ul a,
.content ol a,
.content li a {
  color: var(--amd-red);
}

.content p a:hover,
.content ul a:hover,
.content ol a:hover,
.content li a:hover {
  color: var(--amd-red-dark);
}

/* h1 had no styling anywhere in frame.css -- schedule.html's day headers
   were rendering as unstyled browser-default h1, visibly inconsistent
   with the rest of the site's Open Sans h2/h3. */
h1 {
  font-size: 28px;
  color: var(--amd-black);
  margin: 40px 0 0 0;
  padding: 0;
  font-weight: 700;
  font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  border-left: 4px solid var(--amd-red);
  padding-left: 12px;
}

.content-table > .flex-row:first-child h1:first-child {
  margin-top: 0;
}

/* ---- Hero banner: a bigger, more deliberate version of .banner for
   page-top intros. Reuses .banner's existing dark background/flex
   structure -- just adds a themed accent stripe and larger type. ---- */
.hero {
  position: relative;
  background-color: var(--amd-black);
  background-image: linear-gradient(135deg, #1d1a1a 0%, #1d1a1a 55%, #3a1414 100%);
  border-bottom: 4px solid var(--amd-red);
  padding: 56px 30px;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-block;
  color: var(--amd-red);
  font-family: 'Open Sans Condensed', Helvetica, Arial, sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.hero h1 {
  color: #ffffff;
  border-left: none;
  padding-left: 0;
  font-size: 40px;
  margin: 0 0 12px 0;
}

.hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 18px;
  max-width: 640px;
  margin: 0;
}

.hero a {
  color: var(--amd-red);
  font-weight: 700;
  text-decoration: none;
}

.hero a:hover {
  color: #ff4d4d;
  text-decoration: underline;
}

/* ---- Card grid: for schedule days, team pools, feature highlights ---- */
.card-grid {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 20px;
  margin: 20px 0;
}

.card {
  flex: 1 1 260px;
  background-color: #ffffff;
  border: 1px solid #e5e5e5;
  border-top: 3px solid var(--amd-red);
  border-radius: 4px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.15s ease-in-out, transform 0.15s ease-in-out;
}

.card:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

.card h2,
.card h3 {
  margin-top: 0;
}

.card .card-label {
  display: inline-block;
  background-color: var(--amd-gray-light);
  color: var(--amd-gray);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 8px;
}

.card ul {
  padding-left: 18px;
  margin: 10px 0 0 0;
}

.card li {
  margin-bottom: 6px;
}

/* ---- Feature grid: icon-less highlight tiles (index.html, robotics-competition.html) ---- */
.feature-grid {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0 24px 0;
}

.feature-tile {
  flex: 1 1 200px;
  background-color: var(--amd-gray-light);
  border-radius: 4px;
  padding: 16px 18px;
}

.feature-tile strong {
  color: var(--amd-red);
  display: block;
  margin-bottom: 4px;
}

/* ---- Buttons (e.g. hero CTA links styled as buttons) ---- */
.btn-amd {
  display: inline-block;
  background-color: var(--amd-red);
  color: #ffffff !important;
  font-weight: 700;
  text-decoration: none !important;
  padding: 10px 22px;
  border-radius: 3px;
  transition: background-color 0.15s ease-in-out;
}

.btn-amd:hover {
  background-color: var(--amd-red-dark);
  color: #ffffff !important;
}

/* ---- "How GridMind works" flow diagram: pure CSS + Font Awesome icons,
   no image assets (avoids introducing any unlicensed stock imagery). ---- */
.gm-flow {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  margin: 24px 0;
}

.gm-flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 130px;
}

.gm-flow-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--amd-red);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 10px;
  box-shadow: 0 3px 8px rgba(215, 17, 17, 0.35);
}

.gm-flow-step strong {
  display: block;
  font-size: 14px;
  color: var(--amd-black);
  margin-bottom: 2px;
}

.gm-flow-step span {
  font-size: 12px;
  color: var(--amd-gray);
}

.gm-flow-arrow {
  align-self: center;
  color: #cccccc;
  font-size: 20px;
  margin-top: 22px;
}

@media (max-width: 700px) {
  .gm-flow-arrow {
    transform: rotate(90deg);
    margin: 4px 0;
  }
}

/* ---- Memory-card visual: an illustrative mini grid, not the real card
   set -- entirely CSS-drawn card backs/fronts + Font Awesome icons, so
   there's no photographic asset (and no licensing question) involved. ---- */
.gm-card-demo {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  max-width: 480px;
  margin: 24px auto;
}

.gm-card {
  aspect-ratio: 3 / 4;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  position: relative;
}

.gm-card-back {
  background: repeating-linear-gradient(135deg, var(--amd-black), var(--amd-black) 8px, #2a2626 8px, #2a2626 16px);
  border: 2px solid var(--amd-red);
  color: var(--amd-red);
}

.gm-card-front {
  background-color: #ffffff;
  border: 2px solid #e5e5e5;
  color: var(--amd-black);
}

.gm-card-matched {
  border-color: #2e9e4f;
  color: #2e9e4f;
  box-shadow: 0 0 0 2px rgba(46, 158, 79, 0.25);
}

.gm-card-caption {
  text-align: center;
  font-size: 13px;
  color: var(--amd-gray);
  margin-top: 8px;
}

@media (max-width: 700px) {
  .hero {
    padding: 36px 20px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .card {
    flex: 1 1 100%;
  }
}