/* Xiaomi MiMo & MiSans Architectural Grid Matrix Design System */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Zero rounded corners for clean grid matrix */
}

:root, [data-theme="light"] {
  --bg-canvas: #eae7e1;
  --bg-frame: #f4f3ee;
  --bg-alt: #ecebe5;
  --fg-main: #111111;
  --fg-muted: #555555;
  --border-line: #111111;
  --hover-bg: #000000;
  --hover-fg: #ffffff;
  --gold-color: #d97706;
  --silver-color: #4b5563;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', var(--font-main);
}

[data-theme="dark"] {
  --bg-canvas: #09090b;
  --bg-frame: #131316;
  --bg-alt: #1a1a1e;
  --fg-main: #f4f4f6;
  --fg-muted: #9ca3af;
  --border-line: #333338;
  --hover-bg: #ffffff;
  --hover-fg: #000000;
  --gold-color: #fbbf24;
  --silver-color: #9ca3af;
}

body {
  background-color: var(--bg-canvas);
  color: var(--fg-main);
  font-family: var(--font-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--fg-main);
  text-decoration: underline;
}

/* Language Display */
[data-lang="zh"] .lang-en { display: none !important; }
[data-lang="zh"] .lang-zh { display: block !important; }
[data-lang="en"] .lang-zh { display: none !important; }
[data-lang="en"] .lang-en { display: block !important; }

[data-lang="zh"] .lang-text-en,
[data-lang="en"] .lang-text-zh {
  display: none;
}

/* Bounded Canvas Outer Container */
.page-canvas {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.5rem 1rem;
}

/* Crisp Hairline Grid Frame Matrix */
.grid-frame {
  background-color: var(--bg-frame);
  border: 1px solid var(--border-line);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
}

.grid-row {
  border-bottom: 1px solid var(--border-line);
  position: relative;
}

.grid-row:last-child {
  border-bottom: none;
}

/* Nav Row */
.nav-row {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  background-color: var(--bg-frame);
}

.nav-brand {
  padding: 1rem 1.5rem;
  border-right: 1px solid var(--border-line);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  height: 100%;
}

.nav-link {
  padding: 1rem 1.5rem;
  border-right: 1px solid var(--border-line);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg-main);
  transition: background 0.15s ease, color 0.15s ease;
  display: flex;
  align-items: center;
}

.nav-link:hover {
  background-color: var(--hover-bg);
  color: var(--hover-fg);
}

.nav-controls {
  display: flex;
  height: 100%;
}

.control-btn {
  background: transparent;
  color: var(--fg-main);
  border: none;
  border-left: 1px solid var(--border-line);
  padding: 1rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  height: 100%;
  transition: background 0.15s ease, color 0.15s ease;
}

.control-btn:hover {
  background-color: var(--hover-bg);
  color: var(--hover-fg);
}

/* Hero Block with Repeating Watermark */
.hero-block {
  padding: 4.5rem 2rem;
  position: relative;
  overflow: hidden;
  text-align: center;
  background-color: var(--bg-frame);
}

.watermark-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 140%;
  height: 140%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0.05;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.35em;
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
  line-height: 1.8;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-giant-title {
  font-family: var(--font-display);
  font-size: 3.8rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.hero-subtext {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--fg-muted);
  max-width: 800px;
  margin: 0 auto;
}

/* Multi-Column Rows */
.three-col-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.two-col-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.grid-cell {
  padding: 2rem 1.8rem;
  border-right: 1px solid var(--border-line);
  position: relative;
}

.grid-cell:last-child {
  border-right: none;
}

.feature-cell {
  background-color: var(--bg-frame);
  transition: background 0.2s ease;
}

.feature-cell:hover {
  background-color: var(--bg-alt);
}

.cell-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.cell-sub {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-bottom: 0.8rem;
}

.cell-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1px solid var(--border-line);
  padding: 0.2rem 0.6rem;
  background-color: var(--bg-alt);
}

/* Ticker Marquee Tape (MiSans Banner) */
.ticker-banner {
  background-color: var(--fg-main);
  color: var(--bg-canvas);
  padding: 0.6rem 0;
  overflow: hidden;
  white-space: nowrap;
}

.ticker-track {
  display: inline-block;
  white-space: nowrap;
  animation: ticker-slide 28s linear infinite;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

@keyframes ticker-slide {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Stat Cells (MiSans 600+ Style) */
.stat-cell {
  min-height: 170px;
}

.stat-top-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.04em;
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
}

.stat-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

.stat-corner {
  position: absolute;
  bottom: 0.8rem;
  right: 1.2rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--fg-muted);
}

.bio-summary-cell {
  display: flex;
  align-items: center;
  font-size: 1.05rem;
  line-height: 1.6;
  padding-right: 3rem;
}

/* Statement Banner */
.statement-banner {
  padding: 3rem 2rem;
  background-color: var(--bg-alt);
}

.statement-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.statement-sub {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

/* Section Header Row */
.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.8rem;
  background-color: var(--fg-main);
  color: var(--bg-frame);
}

.section-title-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-badge {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid var(--bg-frame);
  padding: 0.15rem 0.5rem;
}

/* List Item Rows (MiMo 01 / 02 / 03 + Arrow Style) */
.list-item-row {
  display: grid;
  grid-template-columns: 80px 1fr 60px;
  background-color: var(--bg-frame);
  transition: background 0.2s ease, color 0.2s ease;
}

.list-item-row:hover {
  background-color: var(--hover-bg);
  color: var(--hover-fg);
}

.list-item-row:hover .item-index,
.list-item-row:hover .item-arrow,
.list-item-row:hover .item-desc,
.list-item-row:hover a {
  color: var(--hover-fg);
}

.list-item-row:hover .item-arrow {
  transform: translateX(4px);
}

.item-index {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--fg-muted);
  border-right: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: center;
}

.item-main {
  padding: 1.8rem;
}

.item-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.item-title {
  font-size: 1.25rem;
  font-weight: 800;
}

.item-badge {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid var(--border-line);
  padding: 0.2rem 0.5rem;
  background-color: var(--bg-alt);
}

.item-badge.gold {
  color: var(--gold-color);
}

.item-badge.silver {
  color: var(--silver-color);
}

.item-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

.item-link {
  display: inline-block;
  margin-top: 0.6rem;
  font-weight: 700;
  font-size: 0.9rem;
}

.item-arrow {
  border-left: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  transition: transform 0.2s ease;
}

/* Skills Boxes */
.skill-box {
  padding: 1.8rem;
}

.skill-head {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags span {
  font-size: 0.85rem;
  font-weight: 700;
  border: 1px solid var(--border-line);
  padding: 0.3rem 0.7rem;
  background-color: var(--bg-alt);
}

/* Footer Row */
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 1.8rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  background-color: var(--bg-frame);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.footer-left .divider {
  color: var(--fg-muted);
}

.footer-right {
  display: flex;
  gap: 1.2rem;
}

.footer-right a {
  color: var(--fg-main);
  text-decoration: none;
}

.footer-right a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 850px) {
  .hero-giant-title {
    font-size: 2.5rem;
  }
  .nav-row {
    grid-template-columns: 1fr auto;
  }
  .nav-links {
    display: none;
  }
  .three-col-row, .two-col-row {
    grid-template-columns: 1fr;
  }
  .grid-cell {
    border-right: none;
    border-bottom: 1px solid var(--border-line);
  }
  .grid-cell:last-child {
    border-bottom: none;
  }
  .list-item-row {
    grid-template-columns: 60px 1fr 45px;
  }
}