:root {
  --root-bg: #dfd8c8;
  --bg: #f4efe6;
  --text: #1a1a1a;
  --border: #1a1a1a;
  --accent: #ff6b6b;
  --accent-2: #4ecdc4;
  --accent-3: #ffe66d;
  --accent-4: #c780fa;
  --card-bg: #ffffff;
  --shadow-color: #1a1a1a;
  --shadow-offset: 4px;
  --shadow-hover: 6px;
  --radius: 0px; 
  --font-main: "Courier New", Courier, monospace, "SimSun", "宋体", serif;
  --font-retro: "MS Sans Serif", "Geneva", sans-serif;
  --gap: 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --root-bg: #1c1c1c;
    --bg: #2d2d2d;
    --text: #f0f0f0;
    --border: #f0f0f0;
    --accent: #ff5252;
    --accent-2: #1de9b6;
    --accent-3: #ffd740;
    --accent-4: #b388ff;
    --card-bg: #383838;
    --shadow-color: #f0f0f0;
  }
}

:root[data-theme="light"] {
  --root-bg: #dfd8c8;
  --bg: #f4efe6;
  --text: #1a1a1a;
  --border: #1a1a1a;
  --accent: #ff6b6b;
  --accent-2: #4ecdc4;
  --accent-3: #ffe66d;
  --accent-4: #c780fa;
  --card-bg: #ffffff;
  --shadow-color: #1a1a1a;
}

:root[data-theme="dark"] {
  --root-bg: #1c1c1c;
  --bg: #2d2d2d;
  --text: #f0f0f0;
  --border: #f0f0f0;
  --accent: #ff5252;
  --accent-2: #1de9b6;
  --accent-3: #ffd740;
  --accent-4: #b388ff;
  --card-bg: #383838;
  --shadow-color: #f0f0f0;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: var(--font-main);
  color: var(--text);
  background-color: var(--root-bg);
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 20px 20px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease-in-out;
}

.site-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero {
  position: relative;
  overflow: hidden;
  background: var(--accent-3);
  border: 3px solid var(--border);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
  padding: 30px;
  margin-bottom: var(--gap);
}

.hero-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}

@media (min-width: 600px) {
  .hero-main {
    flex-direction: row;
    text-align: left;
  }
}

.hero-avatar {
  width: 140px;
  height: 140px;
  border-radius: 0;
  object-fit: cover;
  border: 4px solid var(--border);
  background: var(--card-bg);
  box-shadow: 4px 4px 0 var(--shadow-color);
}

.hero-title {
  margin: 0;
  font-family: var(--font-retro);
  font-size: 36px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -1px;
}

.hero-subtitle {
  margin: 10px 0 0;
  font-size: 18px;
  font-weight: bold;
  background: var(--border);
  color: var(--bg);
  display: inline-block;
  padding: 4px 8px;
}

.social-links {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.social-link, .social-link-group {
  background: var(--card-bg);
  border: 2px solid var(--border);
  box-shadow: 2px 2px 0 var(--shadow-color);
  font-family: var(--font-retro);
  font-size: 14px;
  display: inline-flex;
}

.social-link {
  padding: 6px 10px;
}
.social-link:hover {
  background: var(--accent-2);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--shadow-color);
}

.social-segment {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 10px;
  border: 0;
  border-right: 2px solid var(--border);
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.social-segment:last-child {
  border-right: none;
}
.social-segment:hover {
  background: var(--accent-2);
}
.social-segment.is-copied {
  background: var(--accent);
  color: var(--text);
}

.quick-buttons {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.quick-button {
  padding: 8px 16px;
  font-family: var(--font-retro);
  font-size: 14px;
  font-weight: bold;
  text-transform: uppercase;
  background: var(--accent);
  border: 2px solid var(--border);
  box-shadow: 2px 2px 0 var(--shadow-color);
  cursor: pointer;
}
.quick-button:hover {
  background: var(--accent-4);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--shadow-color);
}

.main-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

@media (min-width: 900px) {
  .main-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

.content-section {
  display: flex;
  flex-direction: column;
  padding: 0;
  border: 3px solid var(--border);
  background: var(--bg);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
  transition: all 0.2s ease-in-out;
}
.content-section:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover) var(--shadow-hover) 0 var(--shadow-color);
}

.section-title {
  margin: 0;
  font-family: var(--font-retro);
  font-size: 20px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 12px 16px;
  background: var(--border);
  color: var(--bg);
  border-bottom: 3px solid var(--border);
}

.section-subtitle {
  margin: 0;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: bold;
  border-bottom: 3px solid var(--border);
  background: var(--accent-2);
}

.cards-grid {
  display: grid;
  gap: 0;
  align-content: start;
}

.card {
  position: relative;
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 16px;
  padding: 16px;
  border-bottom: 3px solid var(--border);
  background: var(--card-bg);
  transition: background 0.2s;
}
.card:last-child {
  border-bottom: none;
}
.card:hover {
  background: var(--accent-3);
  transform: none;
  box-shadow: none; 
}

.card-icon {
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-title {
  margin: 0 0 4px 0;
  font-family: var(--font-retro);
  font-size: 18px;
  font-weight: 700;
}

.card-tag {
  margin: 0 0 8px 0;
  font-size: 12px;
  font-weight: bold;
  color: var(--bg);
  background: var(--border);
  padding: 2px 6px;
  display: inline-block;
  width: fit-content;
}

.card-summary {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
}

.site-footer {
  margin-top: 40px;
  text-align: center;
  padding: 20px;
  font-family: var(--font-retro);
  font-size: 14px;
  font-weight: bold;
  border: 3px solid var(--border);
  background: var(--card-bg);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
}
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease-out;
  transition-delay: var(--reveal-delay, 0ms);
}
.is-visible {
  opacity: 1;
  transform: translateY(0);
}