/* SuperInstance Design System v1.0 */

/* ── Reset / Base ──────────────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--si-font-sans);
  background: var(--si-bg-primary);
  color: var(--si-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--si-accent-green);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #33ffaa;
}

ul, ol {
  list-style: none;
}

/* ── CSS Variables ─────────────────────────────────────────── */

:root {
  --si-bg-primary: #0a0a0a;
  --si-bg-secondary: #141414;
  --si-bg-card: #1a1a1a;
  --si-bg-hover: #222222;
  --si-text-primary: #e0e0e0;
  --si-text-secondary: #888888;
  --si-text-muted: #555555;
  --si-accent-green: #00ff88;
  --si-accent-blue: #0066ff;
  --si-accent-purple: #8844ff;
  --si-accent-orange: #ff8800;
  --si-error: #ff4444;
  --si-border: #2a2a2a;
  --si-border-hover: #3a3a3a;
  --si-radius: 8px;
  --si-radius-lg: 12px;
  --si-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --si-font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --si-max-width: 1200px;
  --si-nav-height: 64px;
}

/* ── Typography ────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  color: var(--si-text-primary);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.875rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.625rem; }
h5 { font-size: 1.1rem; margin-bottom: 0.5rem; }
h6 { font-size: 1rem; margin-bottom: 0.5rem; }

p {
  color: var(--si-text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

code {
  font-family: var(--si-font-mono);
  background: var(--si-bg-secondary);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--si-accent-green);
}

pre {
  font-family: var(--si-font-mono);
  background: var(--si-bg-secondary);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
}

/* ── Layout ────────────────────────────────────────────────── */

.container {
  max-width: var(--si-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.section {
  padding: 4rem 0;
}

/* ── Cards ─────────────────────────────────────────────────── */

.card {
  background: var(--si-bg-card);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius-lg);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--si-border-hover);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
}

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

/* ── Buttons ───────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--si-radius);
  font-family: var(--si-font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--si-accent-green);
  color: #000;
  border-color: var(--si-accent-green);
}

.btn-primary:hover {
  background: #33ffaa;
  border-color: #33ffaa;
  color: #000;
}

.btn-secondary {
  background: var(--si-bg-card);
  color: var(--si-text-primary);
  border-color: var(--si-border);
}

.btn-secondary:hover {
  border-color: var(--si-border-hover);
  background: var(--si-bg-hover);
}

.btn-outline {
  background: transparent;
  color: var(--si-text-primary);
  border-color: var(--si-border);
}

.btn-outline:hover {
  border-color: var(--si-accent-green);
  color: var(--si-accent-green);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* ── Badges / Tags ─────────────────────────────────────────── */

.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--si-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-green {
  background: rgba(0, 255, 136, 0.15);
  color: var(--si-accent-green);
}

.badge-blue {
  background: rgba(0, 102, 255, 0.15);
  color: var(--si-accent-blue);
}

.badge-purple {
  background: rgba(136, 68, 255, 0.15);
  color: var(--si-accent-purple);
}

.badge-orange {
  background: rgba(255, 136, 0, 0.15);
  color: var(--si-accent-orange);
}

.tag {
  display: inline-block;
  padding: 0.25em 0.75em;
  border: 1px solid var(--si-border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--si-text-secondary);
  transition: border-color 0.2s, color 0.2s;
}

.tag:hover {
  border-color: var(--si-accent-green);
  color: var(--si-accent-green);
}

/* ── Navigation ────────────────────────────────────────────── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--si-nav-height);
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--si-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-brand {
  font-family: var(--si-font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--si-text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.navbar-brand:hover {
  color: var(--si-accent-green);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--si-text-secondary);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link.active {
  color: var(--si-accent-green);
  border-bottom-color: var(--si-accent-green);
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--si-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ── Hero ──────────────────────────────────────────────────── */

.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--si-nav-height) + 3rem) 1.5rem 3rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

.hero-title .accent {
  color: var(--si-accent-green);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--si-text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── Code Blocks ───────────────────────────────────────────── */

.code-block {
  background: var(--si-bg-secondary);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius-lg);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--si-bg-card);
  border-bottom: 1px solid var(--si-border);
  font-family: var(--si-font-mono);
  font-size: 0.8rem;
  color: var(--si-text-muted);
}

.code-block pre {
  margin: 0;
  border: none;
  border-radius: 0;
}

/* Syntax highlighting classes */
.code-block .kw     { color: var(--si-accent-purple); }
.code-block .fn     { color: var(--si-accent-blue); }
.code-block .str    { color: var(--si-accent-green); }
.code-block .cmt    { color: var(--si-text-muted); }
.code-block .num    { color: var(--si-accent-orange); }
.code-block .type   { color: var(--si-accent-blue); }
.code-block .macro  { color: var(--si-accent-green); }

/* ── Tables ────────────────────────────────────────────────── */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--si-bg-secondary);
  color: var(--si-text-secondary);
  font-family: var(--si-font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--si-border);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--si-border);
  color: var(--si-text-primary);
}

.data-table tr:hover td {
  background: var(--si-bg-hover);
}

/* ── Forms ─────────────────────────────────────────────────── */

.input, .select, .textarea {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--si-bg-secondary);
  border: 1px solid var(--si-border);
  border-radius: var(--si-radius);
  color: var(--si-text-primary);
  font-family: var(--si-font-sans);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--si-accent-green);
}

.input::placeholder, .textarea::placeholder {
  color: var(--si-text-muted);
}

.textarea {
  resize: vertical;
  min-height: 100px;
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

label {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  color: var(--si-text-secondary);
  font-weight: 500;
}

.form-group {
  margin-bottom: 1rem;
}

/* ── Footer ────────────────────────────────────────────────── */

.footer {
  background: var(--si-bg-secondary);
  border-top: 1px solid var(--si-border);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer h4 {
  font-size: 0.9rem;
  color: var(--si-text-primary);
  margin-bottom: 1rem;
  font-family: var(--si-font-mono);
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: 0.5rem;
}

.footer a {
  color: var(--si-text-secondary);
  font-size: 0.875rem;
  transition: color 0.2s;
}

.footer a:hover {
  color: var(--si-accent-green);
}

.footer-bottom {
  border-top: 1px solid var(--si-border);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--si-text-muted);
  font-size: 0.8rem;
}

/* ── Animations ────────────────────────────────────────────── */

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

.fade-in {
  animation: fadeIn 0.4s ease-out;
}

.slide-up {
  animation: slideUp 0.5s ease-out;
}

/* ── Responsive ────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--si-nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 10, 0.98);
    border-bottom: 1px solid var(--si-border);
    padding: 1rem 1.5rem;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--si-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-hamburger {
    display: block;
  }

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

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

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .section {
    padding: 2.5rem 0;
  }
}

/* ── Utility Classes ───────────────────────────────────────── */

.text-green  { color: var(--si-accent-green); }
.text-blue   { color: var(--si-accent-blue); }
.text-purple { color: var(--si-accent-purple); }
.text-orange { color: var(--si-accent-orange); }
.text-muted  { color: var(--si-text-muted); }
.text-center { text-align: center; }
.text-mono   { font-family: var(--si-font-mono); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }