/* MeshTrail — site-wide design system. Single stylesheet shared by every
   page in docs/. Dark theme matches the in-app palette. */

:root {
    --bg: #0D1117;
    --bg-elev: #1C2333;
    --bg-elev-2: #242D3D;
    --border: rgba(75, 175, 80, 0.18);
    --text-1: #E6EDF3;
    --text-2: #8B949E;
    --text-3: #6E7681;
    --accent: #4CAF50;
    --accent-dark: #2E7D32;
    --warn: #F59E0B;
    --danger: #EF4444;
    --max-w: 1100px;
    --max-w-prose: 720px;
    --radius: 12px;
    --radius-lg: 18px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text-1);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: #6FCF73; text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ---------------- nav ---------------- */
.nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--bg-elev-2);
}
.nav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    font-weight: 900;
    font-size: 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}
.nav-logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
    color: var(--text-2);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.nav-links a:hover { color: var(--text-1); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.nav-cta {
    background: var(--accent);
    color: #0D1117 !important;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.nav-cta:hover { background: #6FCF73; text-decoration: none; }
.nav-toggle {
    display: none;
    background: none;
    border: 0;
    color: var(--text-1);
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
}

@media (max-width: 720px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--bg-elev-2);
        padding: 8px 0;
    }
    .nav-links.open { display: flex; }
    .nav-links a {
        padding: 14px 20px;
        width: 100%;
        border-top: 1px solid var(--bg-elev-2);
    }
    .nav-links a:first-child { border-top: 0; }
    .nav-cta { margin: 12px 20px; text-align: center; }
}

/* ---------------- hero ---------------- */
.hero {
    text-align: center;
    padding: 100px 20px 80px;
    background:
        radial-gradient(circle at 20% 0%, rgba(76, 175, 80, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 100%, rgba(46, 125, 50, 0.10) 0%, transparent 50%),
        linear-gradient(135deg, var(--bg) 0%, var(--bg-elev) 100%);
    border-bottom: 1px solid var(--bg-elev-2);
}
.hero h1 {
    font-size: clamp(36px, 6vw, 60px);
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 14px;
    letter-spacing: -1px;
}
.hero .tagline {
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--text-2);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 24px;
}
.hero .desc {
    max-width: 640px;
    margin: 0 auto;
    font-size: clamp(15px, 1.5vw, 17px);
    line-height: 1.7;
    color: var(--text-2);
}
.hero .cta-row {
    margin-top: 40px;
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 15px;
    transition: transform 0.15s ease, background 0.15s ease;
    border: 0;
    cursor: pointer;
    font-family: inherit;
}
.btn-primary { background: var(--accent); color: #0D1117; }
.btn-primary:hover { background: #6FCF73; transform: translateY(-1px); text-decoration: none; }
.btn-secondary {
    background: var(--bg-elev);
    color: var(--text-1);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-elev-2); transform: translateY(-1px); text-decoration: none; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; transform: none !important; }
.appstore-badge img { height: 54px; }

/* ---------------- generic page ---------------- */
.page {
    flex: 1;
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 60px 20px;
}
.page-narrow {
    max-width: var(--max-w-prose);
}
.page h1 {
    color: var(--accent);
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 900;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}
.page h2 {
    color: var(--accent);
    font-size: 22px;
    font-weight: 800;
    margin-top: 40px;
    margin-bottom: 12px;
}
.page h3 {
    color: var(--text-1);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}
.page p { color: var(--text-2); margin-bottom: 14px; }
.page ul { padding-left: 22px; margin-bottom: 14px; color: var(--text-2); }
.page li { margin-bottom: 8px; }
.page strong { color: var(--text-1); }
.page .lead { font-size: 17px; color: var(--text-1); }
.page .updated { color: var(--text-3); font-size: 13px; margin-bottom: 24px; }

/* ---------------- feature grid ---------------- */
.section {
    padding: 70px 20px;
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
}
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 {
    font-size: clamp(24px, 3vw, 32px);
    color: var(--text-1);
    margin-bottom: 10px;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.section-head p { color: var(--text-2); max-width: 520px; margin: 0 auto; }
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
}
.card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
    transform: translateY(-3px);
    border-color: rgba(75, 175, 80, 0.5);
    box-shadow: var(--shadow);
}
.card .icon {
    font-size: 32px;
    margin-bottom: 14px;
    display: block;
}
.card h3 { color: var(--text-1); margin-bottom: 8px; font-size: 17px; }
.card p { color: var(--text-2); font-size: 14.5px; margin: 0; }

/* ---------------- FAQ ---------------- */
.faq {
    background: var(--bg-elev);
    border-radius: var(--radius);
    padding: 22px 24px;
    margin: 14px 0;
    border: 1px solid var(--border);
}
.faq h3 { color: var(--text-1); margin-bottom: 6px; font-size: 16px; }
.faq p { color: var(--text-2); margin: 0; }

/* ---------------- contact panel ---------------- */
.panel {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow);
}
@media (max-width: 600px) { .panel { padding: 24px 20px; } }
.form-row { margin-bottom: 18px; }
.form-row label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--bg-elev-2);
    border-radius: 8px;
    padding: 12px 14px;
    color: var(--text-1);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.15s ease;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: 0;
    border-color: var(--accent);
}
.form-row textarea {
    min-height: 140px;
    resize: vertical;
    line-height: 1.5;
}
.form-help {
    color: var(--text-3);
    font-size: 13px;
    margin-top: 4px;
}
.form-row.honeypot { display: none; }

/* ---------------- footer ---------------- */
.footer {
    text-align: center;
    padding: 40px 20px 32px;
    border-top: 1px solid var(--bg-elev-2);
    color: var(--text-3);
    font-size: 13px;
    margin-top: auto;
}
.footer .links {
    margin-bottom: 12px;
    display: flex;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
}
.footer .links a { color: var(--text-2); font-weight: 600; }
.footer .links a:hover { color: var(--accent); text-decoration: none; }
.footer .copy { color: var(--text-3); }

/* ---------------- utilities ---------------- */
.text-center { text-align: center; }
.muted { color: var(--text-2); }
.spacer-sm { height: 16px; }
.spacer-md { height: 32px; }
.spacer-lg { height: 56px; }
.callout {
    background: var(--bg-elev);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    border-radius: 6px;
    color: var(--text-2);
    margin: 18px 0;
}
.pill {
    display: inline-block;
    background: rgba(75, 175, 80, 0.12);
    color: var(--accent);
    border: 1px solid rgba(75, 175, 80, 0.25);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}