:root {
  --bg-color: #ffffff;
  --text-color: #2c3e50;
  --accent-blue: #3498db;
  --accent-green: #2ecc71;
  --accent-gray: #ecf0f1;
  --border-color: #bdc3c7;
  --card-bg: #ffffff;
  --panel-ghost: rgba(0, 0, 0, 0.04);
  --stroke: rgba(0, 0, 0, 0.08);
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
  --radius: 18px;
  --content-width: min(1180px, 94vw);
  --font-main: 'Outfit', sans-serif;
  --bg-pattern-size: 200px;
  --bg-pattern-c1: #f5f6f9;
  --bg-pattern-c2: #e5e7ed;
  --bg-pattern-c3: #d9dce3;
  --bg-pattern-opacity: 0.34;
  --bg-pattern-blur: 12px;
  --bg-overlay: rgba(255, 255, 255, 0.86);
  --grid-color: rgba(0, 0, 0, 0.04);
  --grid-bg: #f5f5f5;
  --grid-overlay: rgba(245, 245, 245, 0.95);
}

body.dark-mode {
  --bg-color: #1e1e1e;
  --text-color: #cccccc;
  --accent-blue: #569cd6;
  --accent-green: #4ec9b0;
  --accent-gray: #252526;
  --border-color: #3e3e42;
  --card-bg: #252526;
  --panel-ghost: rgba(255, 255, 255, 0.04);
  --stroke: rgba(255, 255, 255, 0.08);
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  --bg-pattern-c1: #16171c;
  --bg-pattern-c2: #1f2027;
  --bg-pattern-c3: #2a2b33;
  --bg-pattern-opacity: 0.18;
  --bg-pattern-blur: 10px;
  --bg-overlay: rgba(0, 0, 0, 0.6);
  --grid-color: rgba(255, 255, 255, 0.06);
  --grid-bg: #1a1a1a;
  --grid-overlay: rgba(26, 26, 26, 0.95);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-main);
  color: var(--text-color);
  width: 100%;
  height: 100%;
  position: relative;
  isolation: isolate;
  background-color: var(--bg-color);
  background-image: linear-gradient(var(--bg-overlay), var(--bg-overlay));
  background-size: 100%;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    repeating-conic-gradient(
      from 30deg,
      #0000 0 120deg,
      var(--bg-pattern-c3) 0 180deg
    ) calc(0.5 * var(--bg-pattern-size)) calc(0.5 * var(--bg-pattern-size) * 0.577),
    repeating-conic-gradient(
      from 30deg,
      var(--bg-pattern-c1) 0 60deg,
      var(--bg-pattern-c2) 0 120deg,
      var(--bg-pattern-c3) 0 180deg
    );
  background-size: var(--bg-pattern-size) calc(var(--bg-pattern-size) * 0.577);
  opacity: var(--bg-pattern-opacity);
  filter: blur(var(--bg-pattern-blur));
  transform: scale(1.02);
  pointer-events: none;
  mix-blend-mode: soft-light;
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--panel-ghost);
  border: 1px solid var(--stroke);
  backdrop-filter: blur(8px);
}

.theme-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-color);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: 0.3s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

input:checked+.slider {
  background-color: var(--accent-blue);
}

input:checked+.slider:before {
  transform: translateX(18px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

.branding {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 10;
  display: inline-block;
  color: inherit;
  text-decoration: none;
}

.brand-tag {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-color);
  opacity: 0.8;
  letter-spacing: 1px;
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  position: relative;
  padding: 82px 0 52px;
  width: var(--content-width);
  margin: 0 auto;
  z-index: 1;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--panel-ghost);
  border: 1px solid var(--stroke);
  color: var(--text-color);
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  font-size: 12px;
  box-shadow: var(--shadow);
}

.hero__title {
  margin: 18px 0 12px;
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: -0.01em;
  line-height: 1.08;
  font-weight: 700;
}

.hero__lead {
  margin: 0;
  max-width: 720px;
  color: var(--text-color);
  opacity: 0.7;
  font-size: 18px;
  line-height: 1.6;
}

.scroll-hint {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--panel-ghost);
  border: 1px solid var(--stroke);
  color: var(--text-color);
  opacity: 0.7;
  font-size: 13px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 26px;
  flex-wrap: wrap;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.cta--solid {
  background: var(--accent-blue);
  color: #ffffff;
  box-shadow: 0 16px 40px rgba(52, 152, 219, 0.25);
}

.cta--solid:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 46px rgba(52, 152, 219, 0.35);
}

.cta--ghost {
  border: 1px solid var(--stroke);
  color: var(--text-color);
  opacity: 0.7;
  background: var(--panel-ghost);
}

main {
  position: relative;
  z-index: 1;
  padding: 6px 0 64px;
}

.quick-launch {
  width: var(--content-width);
  margin: 12px auto 26px;
  padding: 18px 0 4px;
}

.quick-launch__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  color: var(--text-color);
  opacity: 0.7;
}

.quick-launch__grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  min-height: 132px;
}

.quick-card {
  background: var(--card-bg);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-color);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.quick-card:hover,
.quick-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent-blue);
  background: var(--accent-gray);
}

.quick-card__thumb {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--accent-gray);
  border: 1px solid var(--stroke);
  overflow: hidden;
  display: grid;
  place-items: center;
}

.quick-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.quick-card__info h4 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.quick-card__info p {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-color);
  opacity: 0.7;
}

.section-head {
  width: var(--content-width);
  margin: 0 auto 12px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-color);
  opacity: 0.7;
}

.section-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 13px;
  color: var(--accent-blue);
}

.section-title {
  margin: 8px 0 0;
  font-size: clamp(26px, 3vw, 34px);
  color: var(--text-color);
  font-weight: 700;
}

.section-meta {
  margin: 0;
  max-width: 280px;
  text-align: right;
  font-size: 14px;
}

.grid {
  width: var(--content-width);
  margin: 26px auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  list-style: none;
  padding: 0;
  min-height: 460px;
}

.game-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  overflow: hidden;
  isolation: isolate;
  content-visibility: auto;
  contain-intrinsic-size: 380px;
  transition: transform 240ms ease, border-color 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

.game-card::before {
  content: "";
  position: absolute;
  inset: -14% -24% 48% 16%;
  background: linear-gradient(125deg, rgba(52, 152, 219, 0.16), rgba(46, 204, 113, 0.14));
  transform: rotate(4deg);
  opacity: 0.6;
  z-index: -1;
  transition: opacity 200ms ease, transform 300ms ease;
}

.game-card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: var(--accent-blue);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.2);
  background: var(--accent-gray);
}

.game-card:hover::before {
  opacity: 1;
  transform: rotate(2deg) translateY(-6px);
}

.game-card:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 4px;
}

.game-card[data-status="soon"] {
  cursor: default;
  opacity: 0.8;
  border-style: dashed;
}

.thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  background: var(--accent-gray);
  border: 1px solid var(--stroke);
  overflow: hidden;
  transform: translateZ(0);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.1);
  min-height: 240px;
}

.thumb::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: radial-gradient(circle at 25% 25%, rgba(52, 152, 219, 0.16), transparent 40%);
  opacity: 0.8;
  pointer-events: none;
  z-index: 1;
}

.thumb__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #f8f9fa;
  opacity: 0;
  transition: opacity 500ms ease;
  filter: saturate(1.08);
  z-index: 2;
}

body.dark-mode .thumb__img {
  background: #0f172a;
}

.thumb__img.is-active {
  opacity: 1;
}

.thumb::after {
  display: none;
}

.thumb.has-thumb {
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  filter: drop-shadow(0 16px 28px rgba(0, 0, 0, 0.15));
}

.thumb.has-thumb[data-game-id="connect4"] {
  background-image: url('../Connect_4/showcase/image.png') !important;
}

.thumb.has-thumb[data-game-id="tictactoe"] {
  background-image: url('../tictactoe/showcase/ttt-hero.svg') !important;
}

.thumb.has-thumb::after {
  display: none;
}

.thumb__indicators {
  position: absolute;
  left: 12px;
  bottom: 10px;
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  box-shadow: 0 6px 26px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(8px);
  pointer-events: none;
  z-index: 2;
}

body.dark-mode .thumb__indicators {
  background: rgba(15, 23, 42, 0.9);
}

.thumb__indicator {
  position: relative;
  display: block;
  width: 28px;
  height: 4px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.16);
  overflow: hidden;
}

body.dark-mode .thumb__indicator {
  background: rgba(255, 255, 255, 0.16);
}

.thumb__indicator::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  transform: scaleX(0);
  transform-origin: left;
}

.thumb__indicator.is-active::after {
  animation: thumbProgress var(--thumb-interval, 2600ms) linear forwards;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(52, 152, 219, 0.14);
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

body.dark-mode .tag {
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent-blue);
}

.game-card h3 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.description {
  margin: 0;
  color: var(--text-color);
  opacity: 0.7;
  line-height: 1.5;
}

.meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-color);
  opacity: 0.7;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent-blue);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.game-card:hover .pill {
  transform: translateX(4px);
  box-shadow: 0 10px 30px rgba(52, 152, 219, 0.25);
}

.pill--ghost {
  background: var(--panel-ghost);
  color: var(--text-color);
  box-shadow: none;
}

.footer {
  position: relative;
  z-index: 1;
  width: var(--content-width);
  margin: 48px auto 18px;
  padding: 18px 0 26px;
  color: var(--text-color);
  opacity: 0.7;
  font-size: 14px;
  border-top: 1px solid var(--stroke);
}

.footer__text {
  margin: 0;
}

@keyframes thumbProgress {
  from {
    transform: scaleX(0);
  }

  to {
    transform: scaleX(1);
  }
}

@media (max-width: 900px) {
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .section-meta {
    text-align: left;
  }

  .quick-launch__head {
    flex-direction: column;
    align-items: flex-start;
  }

  .theme-toggle {
    top: 10px;
    right: 10px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 56px 0 40px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta {
    width: 100%;
    justify-content: center;
  }

  .branding {
    top: 10px;
    left: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .thumb__indicator.is-active::after {
    animation: none;
    transform: scaleX(1);
  }

  * {
    transition: none !important;
  }
}

.blog-section {
  width: var(--content-width);
  margin: 48px auto 0;
  padding: 32px 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.blog-card {
  background: var(--card-bg);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.blog-title {
  margin: 0 0 12px 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
  line-height: 1.3;
}

.blog-excerpt {
  margin: 0 0 16px 0;
  color: var(--text-color);
  opacity: 0.7;
  line-height: 1.6;
  font-size: 0.95rem;
}

.blog-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: gap 150ms ease;
}

.blog-link:hover {
  gap: 10px;
}

@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-section {
    margin-top: 32px;
  }
}