/* OBS-Studio.net design system — Phase 1
   Independent brand: charcoal + teal + amber. Not OBS Project colors. */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #0b1220;
  --color-bg-elevated: #121a2b;
  --color-bg-soft: #182338;
  --color-surface: #1a2438;
  --color-border: rgba(148, 163, 184, 0.18);
  --color-border-strong: rgba(148, 163, 184, 0.35);
  --color-text: #e8eef7;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --color-primary: #2dd4bf;
  --color-primary-hover: #5eead4;
  --color-primary-ink: #042f2e;
  --color-accent: #f59e0b;
  --color-danger: #f87171;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-info: #38bdf8;
  --font-sans: "DM Sans", "IBM Plex Sans", system-ui, sans-serif;
  --font-display: "IBM Plex Sans", "DM Sans", system-ui, sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --container: 1120px;
  --header-h: 64px;
  --focus: 0 0 0 3px rgba(45, 212, 191, 0.45);
  --transition: 160ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(45, 212, 191, 0.12), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(245, 158, 11, 0.08), transparent 55%),
    var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--color-primary-hover); }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 4px; }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: var(--color-primary-ink);
  padding: 0.75rem 1rem; z-index: 10000; font-weight: 600;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.container { width: min(100% - 2rem, var(--container)); margin-inline: auto; }
.section { padding: var(--space-12) 0; }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
}
.section-lead { color: var(--color-text-muted); margin: 0 0 var(--space-6); max-width: 42rem; }

/* Typography scale */
.h1 { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 var(--space-4); }
.h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.2; margin: 0 0 var(--space-3); }
.h3 { font-size: 1.15rem; font-weight: 600; margin: 0 0 var(--space-2); }
.muted { color: var(--color-text-muted); }
.small { font-size: 0.875rem; }

/* Grid */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) {
  .grid-4, .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Header / Nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(11, 18, 32, 0.85);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4); min-height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: var(--color-text); }
.brand img { height: 36px; width: auto; }
.brand-text { font-weight: 700; letter-spacing: -0.02em; }
.brand-tag { display: none; font-size: 0.7rem; color: var(--color-text-muted); font-weight: 500; }
@media (min-width: 1100px) {
  .brand-tag { display: block; }
}
.nav-main { display: none; align-items: center; gap: 0.15rem; flex-wrap: wrap; }
.nav-main a {
  color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; font-weight: 500;
  padding: 0.45rem 0.55rem; border-radius: var(--radius-sm);
}
.nav-main a:hover, .nav-main a[aria-current="page"] { color: var(--color-text); background: var(--color-bg-soft); }
.header-actions { display: flex; align-items: center; gap: 0.5rem; }
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-bg-elevated); color: var(--color-text); cursor: pointer;
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block; width: 18px; height: 2px; background: var(--color-text); border-radius: 1px;
  position: relative; content: "";
}
.nav-toggle-bars::before { position: absolute; top: -6px; }
.nav-toggle-bars::after { position: absolute; top: 6px; }
@media (min-width: 1024px) {
  .nav-main { display: flex; }
  .nav-toggle { display: none; }
}
@media (max-width: 1023px) {
  /* Auth + header search live in the mobile drawer — keep the bar to brand + menu. */
  .header-actions .search-box,
  .header-actions > a.btn,
  .header-actions > .dropdown {
    display: none;
  }
  .brand img { height: 28px; }
  .header-actions { gap: 0.25rem; }
}
.mobile-nav {
  display: none; border-top: 1px solid var(--color-border); padding: var(--space-4) 0 var(--space-6);
  background: var(--color-bg-elevated);
}
.mobile-nav.is-open { display: block; }
.mobile-nav a {
  display: block; padding: 0.75rem 0; color: var(--color-text); text-decoration: none;
  border-bottom: 1px solid var(--color-border); font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  min-height: 44px; padding: 0.65rem 1.1rem; border-radius: var(--radius-sm);
  border: 1px solid transparent; font: inherit; font-weight: 600; cursor: pointer;
  text-decoration: none; transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn-primary { background: var(--color-primary); color: var(--color-primary-ink); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-primary-ink); }
.btn-secondary { background: transparent; border-color: var(--color-border-strong); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-bg-soft); color: var(--color-text); }
.btn-danger { background: var(--color-danger); color: #1a0000; }
.btn-ghost { background: transparent; color: var(--color-text-muted); }
.btn-sm { min-height: 36px; padding: 0.4rem 0.75rem; font-size: 0.875rem; }
.btn-block { width: 100%; }

/* Forms */
.form-group { margin-bottom: var(--space-4); }
.form-label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }
.form-hint { display: block; color: var(--color-text-dim); font-size: 0.8rem; margin-top: 0.3rem; }
.form-error { color: var(--color-danger); font-size: 0.85rem; margin-top: 0.3rem; }
.form-control, .form-select, .form-textarea {
  width: 100%; min-height: 44px; padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm); border: 1px solid var(--color-border-strong);
  background: var(--color-bg-elevated); color: var(--color-text); font: inherit;
}
.form-textarea { min-height: 120px; resize: vertical; }
.form-control:focus, .form-select:focus, .form-textarea:focus { border-color: var(--color-primary); box-shadow: var(--focus); outline: none; }
.form-check { display: flex; align-items: center; gap: 0.5rem; }
.hp-field { position: absolute; left: -10000px; opacity: 0; height: 0; overflow: hidden; }

/* Cards */
.card {
  background: linear-gradient(180deg, rgba(26, 36, 56, 0.95), rgba(18, 26, 43, 0.95));
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-5); transition: border-color var(--transition), transform var(--transition);
}
.card:hover { border-color: rgba(45, 212, 191, 0.35); }
.card-link { text-decoration: none; color: inherit; display: block; height: 100%; }
.card-meta { color: var(--color-text-dim); font-size: 0.8rem; margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.04em; }
.card-title { font-size: 1.05rem; font-weight: 600; margin: 0 0 0.4rem; color: var(--color-text); }
.card-summary { color: var(--color-text-muted); font-size: 0.92rem; margin: 0; }

/* Badges */
.badge {
  display: inline-flex; align-items: center; padding: 0.15rem 0.55rem; border-radius: 999px;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase;
  background: var(--color-bg-soft); color: var(--color-text-muted); border: 1px solid var(--color-border);
}
.badge-teal { background: rgba(45,212,191,0.15); color: var(--color-primary); border-color: rgba(45,212,191,0.3); }
.badge-amber { background: rgba(245,158,11,0.15); color: var(--color-accent); border-color: rgba(245,158,11,0.3); }
.badge-danger { background: rgba(248,113,113,0.15); color: var(--color-danger); }

/* Alerts */
.alert {
  padding: 0.9rem 1rem; border-radius: var(--radius); border: 1px solid var(--color-border);
  margin-bottom: var(--space-4); background: var(--color-bg-elevated);
}
.alert-success { border-color: rgba(52,211,153,0.4); background: rgba(52,211,153,0.08); }
.alert-error { border-color: rgba(248,113,113,0.4); background: rgba(248,113,113,0.08); }
.alert-info { border-color: rgba(56,189,248,0.4); background: rgba(56,189,248,0.08); }
.alert-warning { border-color: rgba(251,191,36,0.4); background: rgba(251,191,36,0.08); }

/* Tabs */
.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-6); flex-wrap: wrap; }
.tab {
  padding: 0.7rem 1rem; color: var(--color-text-muted); text-decoration: none; border-bottom: 2px solid transparent;
  font-weight: 600; font-size: 0.9rem;
}
.tab.is-active, .tab[aria-selected="true"] { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* Accordion */
.accordion-item { border: 1px solid var(--color-border); border-radius: var(--radius); margin-bottom: 0.5rem; background: var(--color-bg-elevated); }
.accordion-trigger {
  width: 100%; text-align: left; background: none; border: 0; color: var(--color-text);
  padding: 1rem 1.1rem; font: inherit; font-weight: 600; cursor: pointer; min-height: 48px;
}
.accordion-panel { display: none; padding: 0 1.1rem 1.1rem; color: var(--color-text-muted); }
.accordion-item.is-open .accordion-panel { display: block; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.65); z-index: 200;
  display: none; align-items: center; justify-content: center; padding: 1rem;
}
.modal-backdrop.is-open { display: flex; }
.modal {
  width: min(100%, 480px); background: var(--color-bg-elevated); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow); max-height: 90vh; overflow: auto;
}

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius); }
table.data { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
table.data th, table.data td { padding: 0.75rem 0.9rem; text-align: left; border-bottom: 1px solid var(--color-border); }
table.data th { background: var(--color-bg-soft); color: var(--color-text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
table.data tr:last-child td { border-bottom: 0; }
@media (max-width: 700px) {
  table.data.responsive thead { display: none; }
  table.data.responsive tr { display: block; border-bottom: 1px solid var(--color-border); padding: 0.75rem 0; }
  table.data.responsive td { display: flex; justify-content: space-between; gap: 1rem; border: 0; padding: 0.35rem 0.9rem; }
  table.data.responsive td::before { content: attr(data-label); font-weight: 600; color: var(--color-text-muted); }
}

/* Pagination */
.pagination { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; margin-top: var(--space-6); }
.pagination a, .pagination span {
  min-width: 40px; min-height: 40px; display: inline-flex; align-items: center; justify-content: center;
  padding: 0.35rem 0.6rem; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  text-decoration: none; color: var(--color-text-muted); background: var(--color-bg-elevated);
}
.pagination a:hover { color: var(--color-text); border-color: var(--color-primary); }
.pagination .is-current { background: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); font-weight: 700; }

/* Breadcrumbs */
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; font-size: 0.85rem; color: var(--color-text-dim); margin-bottom: var(--space-4); }
.breadcrumbs a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs li { list-style: none; display: inline-flex; align-items: center; gap: 0.35rem; }
.breadcrumbs ol { display: contents; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; color: var(--color-text-dim); }

/* Tooltip */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip); position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%);
  background: #000; color: #fff; padding: 0.35rem 0.55rem; border-radius: 4px; font-size: 0.75rem;
  white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity var(--transition); z-index: 50;
}
[data-tooltip]:hover::after, [data-tooltip]:focus-visible::after { opacity: 1; }

/* Skeleton / empty / toast / dropdown */
.skeleton { background: linear-gradient(90deg, var(--color-bg-soft), var(--color-surface), var(--color-bg-soft)); background-size: 200% 100%; animation: shimmer 1.2s infinite; border-radius: var(--radius-sm); min-height: 1rem; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.empty-state { text-align: center; padding: var(--space-12) var(--space-4); color: var(--color-text-muted); border: 1px dashed var(--color-border); border-radius: var(--radius-lg); }
.toast-stack { position: fixed; right: 1rem; bottom: 1rem; z-index: 300; display: flex; flex-direction: column; gap: 0.5rem; max-width: min(100% - 2rem, 360px); }
.toast { background: var(--color-bg-elevated); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 0.85rem 1rem; box-shadow: var(--shadow); }
.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; right: 0; top: calc(100% + 6px); min-width: 200px;
  background: var(--color-bg-elevated); border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 0.35rem; z-index: 80;
}
.dropdown.is-open .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 0.65rem 0.75rem; color: var(--color-text); text-decoration: none; border-radius: var(--radius-sm); }
.dropdown-menu a:hover { background: var(--color-bg-soft); }

/* Hero */
.hero {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
  position: relative;
}
.hero-grid {
  display: grid; gap: var(--space-8); align-items: center;
  grid-template-columns: 1.2fr 1fr;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.hero-panel {
  background: linear-gradient(145deg, rgba(45,212,191,0.12), rgba(18,26,43,0.9));
  border: 1px solid rgba(45,212,191,0.25); border-radius: var(--radius-lg); padding: var(--space-6);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: var(--space-6); }
.disclosure-box {
  margin-top: var(--space-8); padding: var(--space-4); border-radius: var(--radius);
  border: 1px solid var(--color-border); background: rgba(15, 23, 42, 0.6);
  font-size: 0.85rem; color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  margin-top: var(--space-16); border-top: 1px solid var(--color-border);
  background: #070b14; padding: var(--space-12) 0 var(--space-8);
}
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: 2fr 1fr 1fr 1fr; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-dim); margin: 0 0 0.75rem; }
.footer-col a { display: block; color: var(--color-text-muted); text-decoration: none; padding: 0.25rem 0; }
.footer-col a:hover { color: var(--color-primary); }
.footer-disclosure {
  margin-top: var(--space-8); padding-top: var(--space-6); border-top: 1px solid var(--color-border);
  font-size: 0.8rem; color: var(--color-text-dim); max-width: 70rem;
}

/* Search */
.search-box { position: relative; }
.search-box input { padding-right: 2.75rem; }
.autocomplete {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 40;
  background: var(--color-bg-elevated); border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow); display: none; max-height: 320px; overflow: auto;
}
.autocomplete.is-open { display: block; }
.autocomplete a { display: block; padding: 0.7rem 0.9rem; color: var(--color-text); text-decoration: none; border-bottom: 1px solid var(--color-border); }
.autocomplete a:hover, .autocomplete a.is-active { background: var(--color-bg-soft); }

/* Page utilities */
.page-header { margin-bottom: var(--space-8); }
.prose { max-width: 48rem; }
.prose h2 { margin-top: 2rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }
.stack { display: flex; flex-direction: column; gap: var(--space-4); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.live-region { position: absolute; left: -10000px; height: 1px; overflow: hidden; }

/* Auth card */
.auth-shell { min-height: calc(100vh - 200px); display: grid; place-items: center; padding: var(--space-8) var(--space-4); }
.auth-card { width: min(100%, 440px); }

/* High contrast support */
@media (prefers-contrast: more) {
  :root {
    --color-border: rgba(255,255,255,0.45);
    --color-text-muted: #cbd5e1;
  }
  .btn-primary { outline: 2px solid #fff; }
}

/* Settings Generator */
.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.75rem; font-weight: 700; color: var(--color-accent, #f59e0b); margin: 0 0 0.5rem; }
.callout { background: var(--color-bg-soft); border-left: 3px solid var(--color-primary); padding: 0.75rem 1rem; border-radius: var(--radius); margin: 1rem 0; }
.section-alt { background: var(--color-bg-soft); }
.plain-list { margin: 0; padding-left: 1.1rem; }
.plain-list li { margin-bottom: 0.4rem; }
.container.narrow { max-width: 46rem; }
.card-link { text-decoration: none; color: inherit; display: block; transition: border-color 0.15s ease; }
.card-link:hover { border-color: var(--color-primary); }
.settings-hero .hero-actions form { display: inline; }

.wizard-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.wizard-progress { height: 0.4rem; background: var(--color-border); border-radius: 999px; overflow: hidden; margin-bottom: 0.75rem; }
.wizard-progress-bar { height: 100%; background: var(--color-primary); transition: width 0.25s ease; }
.wizard-steps { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0 0 1.25rem; }
.wizard-steps li { font-size: 0.75rem; padding: 0.25rem 0.55rem; border-radius: 999px; background: var(--color-bg-soft); color: var(--color-text-muted); }
.wizard-steps li.is-current { background: var(--color-primary); color: var(--color-primary-ink); font-weight: 600; }
.wizard-steps li.is-done { color: var(--color-text); }
.wizard-form { padding: 1.25rem; }
.wizard-actions { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--color-border); }
.form-control.is-invalid, .form-select.is-invalid { border-color: var(--color-danger); }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem 1.25rem; }
.review-grid dt { font-size: 0.75rem; color: var(--color-text-muted); }
.review-grid dd { margin: 0.1rem 0 0; font-weight: 600; }

.results-header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem; margin-bottom: 1.5rem; }
.results-warnings { background: rgba(245, 158, 11, 0.12); border: 1px solid rgba(245, 158, 11, 0.35); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.5rem; }
.results-warnings ul { margin: 0.5rem 0 0; padding-left: 1.1rem; }
.settings-result-list { display: grid; gap: 1rem; }
.settings-result-head { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; }
.settings-value code, .settings-alt code { font-size: 1.05rem; }
.meta-list { list-style: none; padding: 0; margin: 0.5rem 0; display: flex; flex-wrap: wrap; gap: 0.75rem; }

@media (max-width: 720px) {
  .review-grid { grid-template-columns: 1fr; }
  .wizard-actions { flex-direction: column; align-items: stretch; }
  .results-header { flex-direction: column; }
}