* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --green: #16a34a;
  --green-bg: #f0fdf4;
  --orange: #ea580c;
  --orange-bg: #fff7ed;
  --purple: #9333ea;
  --purple-bg: #faf5ff;
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --radius: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);

  --dark-bg: #0f1117;
  --dark-surface: #1a1d27;
  --dark-text: #e8eaed;
  --dark-text-muted: #9ca3af;
  --dark-border: #2d3140;
  --dark-accent: #6366f1;

  --yellow: #eab308;
  --yellow-bg: #fefce8;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

/* Header */
header {
  background: var(--dark-bg);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--dark-text);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 0.85rem;
  color: var(--dark-text-muted);
}

/* Main */
main {
  flex: 1;
  width: 100%;
}

/* Hero / Mission + Philosophy (merged) */
.hero-dark {
  background: var(--bg);
  color: var(--text);
  padding: 2.5rem 2rem 2rem;
}

.hero-mission {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.hero-mission h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.8rem;
  line-height: 1.2;
}

.hero-mission p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.philosophy-pillars {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.pillar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pillar-emoji {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.pillar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Tools section */
.tools-section {
  background: var(--bg);
  padding: 4rem 2rem;
}

.tools-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.tools-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.tools-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Tools grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Tool card */
.tool-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* Color variants */
.tool-card[data-color="green"]:hover { border-color: var(--green); }
.tool-card[data-color="orange"]:hover { border-color: var(--orange); }
.tool-card[data-color="purple"]:hover { border-color: var(--purple); }
.tool-card[data-color="blue"]:hover { border-color: var(--blue); }
.tool-card[data-color="red"]:hover { border-color: var(--red); }

.tool-card[data-color="green"] .tool-icon { color: var(--green); background: var(--green-bg); }
.tool-card[data-color="orange"] .tool-icon { color: var(--orange); background: var(--orange-bg); }
.tool-card[data-color="purple"] .tool-icon { color: var(--purple); background: var(--purple-bg); }
.tool-card[data-color="blue"] .tool-icon { color: var(--blue); background: var(--blue-bg); }
.tool-card[data-color="red"] .tool-icon { color: var(--red); background: var(--red-bg); }

.tool-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.4rem;
}

.tool-icon svg {
  width: 28px;
  height: 28px;
}

.tool-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.tool-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.tool-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.6rem;
  align-self: flex-start;
  margin-top: auto;
}

/* Status badge */
.status-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  letter-spacing: 0.3px;
}

.status-badge.experimental {
  background: var(--yellow-bg);
  color: #92400e;
  border: 1px solid #fde68a;
}

.status-badge.production {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid #bbf7d0;
}

.status-badge.prototype {
  background: var(--blue-bg);
  color: var(--blue);
  border: 1px solid #bfdbfe;
}

/* CTA section */
.cta-section {
  background: var(--surface);
  color: var(--text);
  padding: 4rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.cta-inner h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
}

.cta-inner p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn:hover {
  transform: translateY(-2px);
}

.cta-primary {
  background: var(--dark-accent);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.cta-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.cta-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.cta-secondary:hover {
  border-color: var(--text-muted);
}

/* Footer */
footer {
  background: var(--surface);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 900px) {
  .philosophy-pillars {
    gap: 1rem 1.5rem;
  }
}

@media (max-width: 700px) {
  .hero-dark {
    padding: 2rem 1rem 1.5rem;
  }

  .hero-mission h1 {
    font-size: 1.5rem;
  }

  .philosophy-pillars {
    gap: 1rem;
  }

  .tools-section {
    padding: 2.5rem 1rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .tool-card {
    padding: 1.5rem;
  }

  .cta-section {
    padding: 3rem 1rem;
  }

  .cta-inner h2 {
    font-size: 1.4rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-btn {
    width: 100%;
    max-width: 320px;
    text-align: center;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
  }
}

@media (max-width: 480px) {
  .philosophy-pillars {
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
  }
}