/* =========================================================
   SimBot — Documentation Site
   ========================================================= */

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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fb;
  --color-border: #dde2ee;
  --color-text: #1a1a2e;
  --color-text-muted: #5a6480;
  --color-accent: #1a3464;
  --color-accent-mid: #2a4fa0;
  --color-accent-light: #edf0f9;
  --color-code-bg: #f0f3fa;

  --badge-admin-bg: #1a3464;
  --badge-admin-fg: #ffffff;
  --badge-mod-bg: #e8ebf5;
  --badge-mod-fg: #1a3464;
  --badge-public-bg: #ffffff;
  --badge-public-fg: #5a6480;
  --badge-public-border: #c8cfdf;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Consolas, monospace;

  --radius: 6px;
  --radius-sm: 3px;
  --transition: 160ms ease;
  --max-width: 1080px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

/* --- Typography ------------------------------------------ */
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }

p { color: var(--color-text-muted); }

code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--color-code-bg);
  color: var(--color-text);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* --- Header ---------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-accent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 56px;
}

.logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
  text-decoration: none;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}

.site-nav a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: #ffffff;
  margin-left: auto;
}

/* --- Hero ------------------------------------------------ */
.hero {
  padding: 96px 0 80px;
  background: var(--color-accent);
  border-bottom: none;
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 100px;
  padding: 4px 12px;
  margin-bottom: 24px;
}

.hero h1 {
  margin-bottom: 20px;
  color: #ffffff;
  max-width: 680px;
}

.hero-sub {
  font-size: 1.125rem;
  max-width: 560px;
  margin-bottom: 48px;
  color: rgba(255, 255, 255, 0.7);
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #ffffff;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- Sections -------------------------------------------- */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--color-border);
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  margin-bottom: 8px;
}

.section-sub {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 48px;
  max-width: 600px;
}

/* --- Features Grid --------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-border);
}

.feature-card {
  background: var(--color-bg);
  padding: 28px 24px;
  transition: background var(--transition);
}

.section-alt .feature-card {
  background: var(--color-bg-alt);
}

.feature-card:hover {
  background: var(--color-accent-light);
}

.feature-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 16px;
  color: var(--color-accent);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.6;
}

/* --- Commands -------------------------------------------- */
.command-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 28px;
}

.filter-btn {
  font-size: 0.8rem;
  font-family: var(--font-sans);
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

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

.filter-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.command-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 8px;
}

.command-group.hidden {
  display: none;
}

.group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  background: var(--color-bg-alt);
  transition: background var(--transition);
}

.group-header:hover {
  background: var(--color-accent-light);
}

.group-header h3 {
  flex: 1;
  font-size: 0.9rem;
}

.group-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-border);
  padding: 2px 8px;
  border-radius: 100px;
}

.chevron {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transform: rotate(0deg);
  transition: transform var(--transition);
  line-height: 1;
}

.command-group.open .chevron {
  transform: rotate(90deg);
}

.group-body {
  display: none;
  border-top: 1px solid var(--color-border);
}

.command-group.open .group-body {
  display: block;
}

.command-table-wrapper {
  overflow-x: auto;
}

.command-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.command-table thead {
  background: var(--color-bg-alt);
}

.command-table th {
  text-align: left;
  padding: 10px 16px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.command-table td {
  padding: 12px 16px;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.command-table td:first-child {
  color: var(--color-text);
  white-space: nowrap;
}

.command-table tr:last-child td {
  border-bottom: none;
}

.command-table tr:hover td {
  background: var(--color-accent-light);
}

/* --- Badges ---------------------------------------------- */
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 100px;
  white-space: nowrap;
}

.badge-admin {
  background: var(--badge-admin-bg);
  color: var(--badge-admin-fg);
}

.badge-mod {
  background: var(--badge-mod-bg);
  color: var(--badge-mod-fg);
  border: 1px solid var(--color-border);
}

.badge-public {
  background: var(--badge-public-bg);
  color: var(--badge-public-fg);
  border: 1px solid var(--badge-public-border);
}

/* --- Workflow Steps --------------------------------------- */
.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.workflow-step {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.workflow-step:last-child {
  border-bottom: none;
}

.workflow-step:hover {
  background: var(--color-accent-light);
}

.step-number {
  flex-shrink: 0;
  width: 72px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 28px 0 28px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  border-right: 1px solid var(--color-border);
}

.step-content {
  padding: 24px 28px;
  flex: 1;
}

.step-content h3 {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.step-content p {
  font-size: 0.875rem;
  line-height: 1.65;
}

/* --- Get Started ----------------------------------------- */
.section-get-started {
  background: var(--color-bg-alt);
}

.setup-steps {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.setup-step {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: background var(--transition);
}

.setup-step:last-child {
  border-bottom: none;
}

.setup-step:hover {
  background: var(--color-accent-light);
}

.setup-step-number {
  flex-shrink: 0;
  width: 64px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 28px 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  border-right: 1px solid var(--color-border);
}

.setup-step-body {
  padding: 24px 28px;
  flex: 1;
}

.setup-step-body h3 {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.setup-step-body p {
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: 0;
}

.invite-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 20px;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition);
}

.invite-btn:hover {
  background: var(--color-accent-mid);
}

/* --- Footer ---------------------------------------------- */
.site-footer {
  padding: 28px 0;
  background: var(--color-accent);
  border-top: none;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-note {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer .logo {
  color: #ffffff;
}

/* --- Responsive ------------------------------------------ */
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-accent);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-direction: column;
    padding: 12px;
    gap: 2px;
  }

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

  .site-header {
    position: relative;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .hero-stats {
    gap: 28px;
    flex-wrap: wrap;
  }

  .section {
    padding: 56px 0;
  }

  .step-number {
    width: 48px;
    font-size: 0.65rem;
  }

  .command-table th:nth-child(3),
  .command-table td:nth-child(3) {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

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