/* MailDev marketing site — hand-written, no build step.
   Design tokens mirror the app (packages/ui/src/index.css):
   off-white #FAFAFA canvas, deep navy-black #182436 primary, blue #2563eb accent. */

:root {
  --off-white: #fafafa;
  --navy: #182436;

  --bg: #fafafa;
  --bg-alt: #f4f5f6;
  --fg: #182436;
  --fg-muted: #556072;
  --card: #ffffff;
  --border: #e6e8eb;
  --border-strong: #d7dade;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-contrast: #ffffff;
  --code-bg: #f3f4f6;
  --code-fg: #182436;
  --shadow: 0 1px 2px rgba(24, 36, 54, 0.04), 0 8px 24px rgba(24, 36, 54, 0.06);
  --shadow-lg: 0 12px 48px rgba(24, 36, 54, 0.14);
  --radius: 0.5rem;
  --radius-lg: 0.875rem;
  --maxw: 1080px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #182436;
    --bg-alt: #1c2a3e;
    --fg: #eaecee;
    --fg-muted: #a7b0bd;
    --card: #1f2e42;
    --border: #2b3a50;
    --border-strong: #35465f;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-contrast: #0f1826;
    --code-bg: #14202f;
    --code-fg: #eaecee;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);

    color-scheme: dark;
  }
}

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

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

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); margin: 0 0 1rem; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); margin: 0 0 1rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }
p { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.narrow { max-width: 760px; }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.muted { color: var(--fg-muted); }
.lead { font-size: 1.2rem; color: var(--fg-muted); }
.center { text-align: center; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; color: var(--fg); }
.brand svg { width: 24px; height: 24px; }
.nav-links { display: flex; align-items: center; gap: 1.25rem; margin-left: auto; }
.nav-links a { color: var(--fg-muted); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }

.star-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding: 0.32rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1;
  color: var(--fg);
  background: var(--card);
}
.star-pill:hover {
  background: var(--bg-alt);
  color: var(--fg);
  text-decoration: none;
  border-color: var(--fg-muted);
}
.star-pill .gh { width: 15px; height: 15px; flex-shrink: 0; }
.star-pill .star { width: 14px; height: 14px; flex-shrink: 0; color: #e3b341; }
.star-pill [data-gh-stars] { font-variant-numeric: tabular-nums; }
@media (max-width: 640px) {
  .nav-links .hide-sm { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: #fafafa; }
.btn-primary:hover { background: #0f1826; color: #fafafa; }
@media (prefers-color-scheme: dark) {
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-hover); color: #fff; }
}
.btn-secondary { background: var(--card); color: var(--fg); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-alt); color: var(--fg); }
.btn svg { width: 18px; height: 18px; }

/* ---------- Sections ---------- */
section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 640px; margin: 0 auto 3rem; text-align: center; }
.section-head p { color: var(--fg-muted); font-size: 1.1rem; margin: 0; }

/* ---------- Hero ---------- */
.hero { padding: 5rem 0 3rem; text-align: center; }
.hero .lead { max-width: 620px; margin: 0 auto 2rem; }
.hero-cta { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.hero-note { font-size: 0.9rem; color: var(--fg-muted); }

/* screenshot frame with light/dark cross-fade */
.shot-frame {
  position: relative;
  margin: 3rem auto 0;
  max-width: 960px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  background: var(--card);
}
.shot-frame img { width: 100%; display: block; }
.shot-frame .shot-dark { position: absolute; inset: 0; opacity: 0; transition: opacity 0.4s ease; }
.shot-frame:hover .shot-dark, .shot-frame:focus-within .shot-dark { opacity: 1; }
@media (prefers-color-scheme: dark) {
  .shot-frame .shot-dark { opacity: 1; }
  .shot-frame .shot-light { opacity: 0; }
  .shot-frame:hover .shot-light, .shot-frame:focus-within .shot-light { opacity: 1; }
  .shot-frame:hover .shot-dark, .shot-frame:focus-within .shot-dark { opacity: 0; }
}
.shot-hint {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
  text-align: center;
}

/* ---------- Code blocks ---------- */
code, kbd, pre, .mono {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas,
    'Liberation Mono', monospace;
}
code:not(pre code) {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.12em 0.4em;
  border-radius: 0.3rem;
  font-size: 0.9em;
}
pre {
  background: var(--navy);
  color: #e8eef7;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.55;
  border: 1px solid var(--border-strong);
}
pre code { background: none; color: inherit; padding: 0; }
.cmd { color: #7cc4ff; }
.cmd::before { content: '$ '; color: #5b6472; }
.comment { color: #8b93a1; }

.callout {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
}
.callout svg { width: 22px; height: 22px; color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.callout p { margin: 0; }
.callout strong { color: var(--fg); }

.kbd {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8em;
  line-height: 1;
  padding: 0.25em 0.5em;
  border-radius: 0.4rem;
  color: var(--fg);
  background: var(--code-bg);
  border: 1px solid var(--border-strong);
  box-shadow: 0 1px 0 var(--border-strong);
  vertical-align: middle;
}
.card-shot h3 .kbd { margin-left: 0.4rem; }

.copy-cmd {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--navy);
  color: #e8eef7;
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
}
.copy-cmd .prompt { color: #5b6472; }

/* ---------- Feature grid ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid > * { min-width: 0; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.feature .icon {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  background: var(--navy);
  color: #fafafa;
  margin-bottom: 0.9rem;
}
@media (prefers-color-scheme: dark) {
  .feature .icon { background: var(--accent); color: #fff; }
}
.feature .icon svg { width: 22px; height: 22px; }
.feature h3 { margin-bottom: 0.35rem; }
.feature p { color: var(--fg-muted); font-size: 0.95rem; margin: 0; }

.card-shot { padding: 0; overflow: hidden; }
.card-shot img { width: 100%; border-bottom: 1px solid var(--border); }
.card-shot .card-body { padding: 1.25rem 1.5rem 1.5rem; }
.card-shot h3 { margin-bottom: 0.35rem; }
.card-shot p { color: var(--fg-muted); font-size: 0.95rem; margin: 0; }

/* ---------- MCP / Claude flagship ---------- */
.mcp { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: center; }
.mcp > * { min-width: 0; }
@media (max-width: 820px) { .mcp { grid-template-columns: 1fr; } }
.chat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.chat-head {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem; color: var(--fg-muted);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.chat-body { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; }
.bubble { padding: 0.75rem 1rem; border-radius: var(--radius); max-width: 90%; font-size: 0.95rem; }
.bubble-user { align-self: flex-end; background: var(--accent); color: #fff; }
.bubble-ai { align-self: flex-start; background: var(--bg-alt); border: 1px solid var(--border); }
.bubble-ai code { background: color-mix(in srgb, var(--accent) 12%, transparent); }

.pill-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.pill {
  font-size: 0.82rem; font-family: ui-monospace, Menlo, monospace;
  background: var(--code-bg); color: var(--fg);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 0.25rem 0.7rem;
}

/* ---------- Comparison table ---------- */
.table-wrap { overflow-x: auto; }
table.compare {
  width: 100%; border-collapse: collapse; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
}
table.compare th, table.compare td { padding: 0.85rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
table.compare thead th { background: var(--bg-alt); font-size: 0.9rem; }
table.compare tr:last-child td { border-bottom: none; }
table.compare td.yes { color: #16a34a; font-weight: 600; }
table.compare td.no { color: var(--fg-muted); }

/* ---------- Sponsor ---------- */
.sponsor-band { padding: 1rem 0 4rem; }
.sponsor {
  display: flex; align-items: center; gap: 1rem;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow);
  max-width: 760px; margin: 0 auto;
}
.sponsor img { max-width: 240px; flex-shrink: 0; }
.sponsor p { margin: 0; font-size: 0.95rem; color: var(--fg-muted); }
@media (max-width: 560px) { .sponsor { flex-direction: column; text-align: center; } }

/* ---------- Article (guide pages / md-style) ---------- */
.article { max-width: 760px; margin: 0 auto; }
.article h2 { margin-top: 2.5rem; padding-bottom: 0.35rem; border-bottom: 1px solid var(--border); }
.article h3 { margin-top: 1.75rem; }
.article ul, .article ol { padding-left: 1.4rem; }
.article li { margin-bottom: 0.4rem; }
.back-link { display: inline-block; margin-bottom: 1rem; font-size: 0.9rem; }
.article .eyebrow { display: block; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.footer-grid { display: flex; flex-wrap: wrap; gap: 2rem 3rem; justify-content: space-between; }
.footer-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-links a { color: var(--fg-muted); }
.footer-links a:hover { color: var(--fg); }