/* ==========================================================================
   Emaily Docs — Design System
   Modern, professional documentation UI (light + dark)
   ========================================================================== */

/* ----- Reset & tokens ----- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

:root {
  --font-ui: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg: #ffffff;
  --bg-subtle: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;

  --text: #0f172a;
  --text-2: #475569;
  --text-dim: #64748b;
  --link: #4f46e5;
  --link-hover: #4338ca;

  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-soft: #eef2ff;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --code-border: #1e293b;

  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 8px 24px -12px rgba(15, 23, 42, .12);
  --shadow-lg: 0 24px 48px -16px rgba(15, 23, 42, .18);
  --maxw: 1140px;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0b1020;
  --bg-subtle: #0e1526;
  --surface: #111a2e;
  --surface-2: #16213a;
  --border: #1f2b47;
  --border-strong: #2c3b5e;

  --text: #e7ecf5;
  --text-2: #a9b6cc;
  --text-dim: #7d8ba3;
  --link: #a5b4fc;
  --link-hover: #c7d2fe;

  --accent: #818cf8;
  --accent-2: #a78bfa;
  --accent-soft: #1e2a52;

  --code-bg: #0a0f1e;
  --code-text: #dbe4f5;
  --code-border: #1e2a4a;

  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;

  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px -16px rgba(0, 0, 0, .5);
  --shadow-lg: 0 28px 56px -20px rgba(0, 0, 0, .6);
  color-scheme: dark;
}

/* ----- Base ----- */
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); color: var(--text); }

a { color: var(--link); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--link-hover); }

img, svg { vertical-align: middle; }

/* ----- Header / navigation ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 64px;
  padding: 0 clamp(1rem, 4vw, 2rem);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -.02em;
  color: var(--text);
}
.brand:hover { color: var(--text); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--gradient);
  color: #fff;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 4px 12px -4px rgba(99, 102, 241, .6);
}

.brand-name { white-space: nowrap; }

.site-nav {
  display: flex;
  align-items: center;
  gap: .25rem;
  flex: 1;
  overflow-x: auto;
}

.site-nav a {
  padding: .45rem .85rem;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a.active { color: var(--link); background: var(--accent-soft); font-weight: 600; }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  font-size: 1rem;
  transition: all .15s ease;
  padding: 0;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: inline; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }

.nav-toggle {
  display: none;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
}

/* ----- Layout ----- */
.site-main { flex: 1; width: 100%; margin: 0 auto; max-width: var(--maxw); }

.doc-wrap {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) clamp(1rem, 4vw, 2rem) 4rem;
}

/* ----- Page hero (index) ----- */
.hero {
  padding: clamp(3.5rem, 8vw, 6.5rem) clamp(1rem, 4vw, 2rem) 3rem;
  text-align: center;
  background: radial-gradient(60% 60% at 50% 0%, var(--accent-soft) 0%, transparent 70%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .35rem .9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-2);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); }

.hero h1 {
  margin: 1.1rem 0 .75rem;
  font-size: clamp(2.2rem, 5.5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -.035em;
  font-weight: 800;
}

.hero .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero .lead {
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-2);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.6;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; margin-top: 1.75rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.3rem;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: all .15s ease;
}
.btn:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }

.btn-primary { background: var(--gradient); color: #fff; border: none; box-shadow: 0 8px 20px -8px rgba(99, 102, 241, .7); }
.btn-primary:hover { color: #fff; filter: brightness(1.05); }

.hero-meta { margin-top: 2.5rem; display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font-size: .8rem;
  font-weight: 500;
}
.pill code { background: none; border: none; padding: 0; color: var(--text); }

/* ----- Feature cards ----- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.25rem;
  padding: 0 clamp(1rem, 4vw, 2rem) 2rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  transition: all .18s ease;
  box-shadow: var(--shadow);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
  color: var(--text);
}

.card-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  font-size: 1.3rem;
}

.card h3 { margin: 0; font-size: 1.1rem; font-weight: 700; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--text-2); font-size: .92rem; line-height: 1.55; }
.card .card-link { margin-top: auto; font-size: .88rem; font-weight: 600; color: var(--link); }
/* ----- Docs typography ----- */
.doc { padding: clamp(1.5rem, 4vw, 3rem) clamp(1rem, 4vw, 2.5rem) 4rem; }

.doc h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -.03em;
  font-weight: 800;
}

.doc h2 {
  margin: 3rem 0 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.45rem;
  line-height: 1.3;
  letter-spacing: -.02em;
  font-weight: 700;
}

.doc h3 {
  margin: 2.25rem 0 .75rem;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.doc h4 { margin: 1.75rem 0 .6rem; font-size: 1rem; font-weight: 700; }

.doc p { margin: 0 0 1.1rem; color: var(--text-2); }
.doc strong { color: var(--text); font-weight: 650; }

.doc ul, .doc ol { margin: 0 0 1.2rem; padding-left: 1.3rem; color: var(--text-2); }
.doc li { margin: .35rem 0; }
.doc li::marker { color: var(--accent-2); }

.doc hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

.doc a { text-decoration-style: dotted; text-underline-offset: 3px; }

.doc blockquote {
  margin: 1.25rem 0;
  padding: .9rem 1.1rem .1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  background: var(--accent-soft);
}
.doc blockquote p { margin-bottom: .8rem; color: var(--text-2); }

/* ----- Inline & block code ----- */
.doc code {
  font-family: var(--font-mono);
  font-size: .86em;
  padding: .18em .42em;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent);
  white-space: nowrap;
}

.doc pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--code-text);
  white-space: pre;
}

.doc .codeblock {
  color: var(--code-text);
}

.doc .codeblock pre,
.doc .codeblock pre code {
  color: #e2e8f0;
  background: transparent;
}

.doc .codeblock pre code {
  font-family: var(--font-mono);
  font-size: .86rem;
  line-height: 1.6;
  -webkit-text-fill-color: #e2e8f0;
}

.doc p,
.doc li,
.doc td,
.doc th,
.doc blockquote {
  color: var(--text-2);
}

.doc h1,
.doc h2,
.doc h3,
.doc h4 {
  color: var(--text);
}

.codeblock {
  position: relative;
  margin: 1.25rem 0;
  border-radius: var(--radius);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  overflow: hidden;
}

.codeblock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .55rem 1rem;
  background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid var(--code-border);
}

.codeblock-lang {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #94a3b8;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .28rem .6rem;
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 6px;
  background: transparent;
  color: #cbd5e1;
  font-family: var(--font-ui);
  font-size: .76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s ease;
}
.copy-btn:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.copy-btn.copied { color: var(--success); border-color: var(--success); }

.codeblock pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}
.codeblock pre code { display: block; }

/* ----- Tables ----- */
.doc table {
  width: 100%;
  margin: 1.25rem 0;
  border-collapse: collapse;
  font-size: .92rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.doc thead th {
  padding: .8rem 1rem;
  text-align: left;
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.doc tbody td {
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
  vertical-align: top;
}

.doc tbody tr:last-child td { border-bottom: none; }
.doc tbody tr:hover { background: var(--bg-subtle); }
.doc tbody td code { color: var(--text); white-space: normal; }

/* ----- Footer ----- */
.site-footer {
  margin-top: auto;
  padding: 2.5rem clamp(1rem, 4vw, 2rem);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: .85rem;
}
.site-footer .muted { margin-top: .25rem; font-size: .8rem; }

/* ----- Responsive ----- */
@media (max-width: 720px) {
  .nav-toggle { display: inline-grid; }
  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
    padding: .75rem 1rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .7rem .9rem; border-radius: 10px; }
  .cards { grid-template-columns: 1fr; }
}
.site { display: flex; flex-direction: column; min-height: 100vh; }