/* ── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg:          #fafafa;
  --bg-card:     #ffffff;
  --bg-hover:    #f5f5f5;
  --border:      #e0e0e0;
  --border-bright: #cccccc;
  --text:        #1a1a1a;
  --text-dim:    #6b6b6b;
  --accent:      #BF5638;
  --accent-dim:  rgba(191, 86, 56, 0.06);
  --max-w:       1080px;
  --font-mono:   "Geist Mono", "SF Mono", "Fira Code", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans:   -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-mono);
  border-radius: 0;
  padding: 8px 16px;
  transition: all 0.15s ease;
  border: 1px solid var(--border-bright);
  cursor: pointer;
  color: var(--text-dim);
  background: transparent;
  letter-spacing: 0.01em;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ── Nav ──────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(250, 250, 250, 0.85);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  transition: color 0.15s;
}
.nav-links a:hover {
  color: var(--text);
}

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 140px 0 0;
  text-align: center;
  overflow: hidden;
}

.hero-elephant {
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: clamp(12px, 2vw, 22px);
  line-height: 1.3;
  color: var(--border);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  margin: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 400;
  font-family: "Instrument Serif", serif;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-sub {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 56px;
  line-height: 1.7;
}

/* ── ASCII Diagram ───────────────────────────────────── */
.ascii-diagram {
  position: relative;
  margin: 0 auto 64px;
  max-width: 680px;
}

.ascii-diagram pre {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.3vw, 14px);
  line-height: 1.45;
  color: var(--text-dim);
  text-align: left;
  overflow-x: auto;
  padding: 32px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  width: fit-content;
  margin: 0 auto;
}

.ascii-diagram .highlight {
  color: var(--accent);
}

.ascii-diagram .label {
  color: var(--text);
}


/* ── Product Grid ────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 80px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
  transition: all 0.15s ease;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--border);
}
.product-card:hover {
  box-shadow: 6px 6px 0 var(--border-bright);
}

.card-featured {
  background: var(--accent-dim);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-bright);
  background: var(--accent-dim);
  color: var(--accent);
  flex-shrink: 0;
}

.card-header h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-family: var(--font-mono);
  color: var(--text);
}

.card-desc {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.65;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border-bright);
  padding: 2px 8px;
  border-radius: 0;
}

/* ── Footer ───────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-sep {
  font-size: 12px;
  line-height: 1;
  color: var(--text-dim);
  transform: translateY(1px);
}

.footer-bytebase {
  font-size: 12px;
  line-height: 1;
  font-family: var(--font-mono);
  color: var(--text-dim);
  transition: color 0.15s;
  transform: translateY(1px);
}
.footer-bytebase:hover {
  color: var(--accent);
}

.footer-compact .logo {
  font-size: 14px;
  line-height: 1;
}

.footer-compact p {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
  .hero {
    padding: 120px 0 0;
  }

  .hero-sub br {
    display: none;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .ascii-diagram pre {
    font-size: 9px;
    padding: 20px 16px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
  }

  .ascii-diagram pre {
    font-size: 7.5px;
    padding: 16px 12px;
  }
}