/* TrackMyAligners — shared site styles (nav, footer, tokens, document pages) */

:root {
    --brand: #6B5FF2;
    --brand-dark: #5B4FE2;
    --brand-light: #8B7FF5;
    --brand-tint: #F5F3FF;
    --brand-tint-2: #EDE9FE;
    --green: #10B981;
    --green-tint: #ECFDF5;
    --amber: #F59E0B;
    --amber-tint: #FEF3C7;
    --red: #EF4444;

    --bg: #FFFFFF;
    --bg-soft: #F8F7FC;
    --surface: #FFFFFF;
    --border: #ECEAF3;
    --text: #17152B;
    --text-2: #55536A;
    --text-3: #8A889C;
    --on-brand: #FFFFFF;
    --shadow: 0 1px 2px rgba(23, 21, 43, 0.04), 0 8px 24px rgba(23, 21, 43, 0.06);
    --shadow-lg: 0 30px 80px rgba(60, 45, 170, 0.22);

    --radius: 16px;
    --max: 1120px;
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color-scheme: light;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

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

/* ── Nav ── */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.0625rem;
    color: var(--text);
    letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px rgba(107, 95, 242, 0.18), 0 2px 6px rgba(107, 95, 242, 0.15);
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-2); font-size: 0.9375rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.nav-cta {
    color: #fff;
    background: #6B5FF2;
    padding: 10px 18px;
    font-size: 0.9375rem;
    border-radius: 999px;
    box-shadow: 0 4px 14px rgba(107, 95, 242, 0.4);
}
.nav-links a.nav-cta:hover { color: #fff; background: #5B4FE2; box-shadow: 0 6px 20px rgba(107, 95, 242, 0.5); }
.nav-links a.nav-cta svg { width: 16px; height: 16px; margin-top: -2px; }

.nav-links a { white-space: nowrap; }
@media (max-width: 1120px) {
    .nav-links { gap: 18px; }
}
/* Mobile menu (assets/nav.js builds the button and the panel) */
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    padding: 0;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle .icon-close, .nav.open .nav-toggle .icon-open { display: none; }
.nav.open .nav-toggle .icon-close { display: block; }
.nav-menu { display: none; }
@media (max-width: 1000px) {
    .nav-links { gap: 12px; }
    .nav-links a:not(.btn) { display: none; }
    .nav-toggle { display: inline-grid; }
    .nav.open { background: var(--bg); border-bottom-color: var(--border); }
    .nav.open .nav-menu {
        display: grid;
        gap: 2px;
        padding: 8px 16px 16px;
        border-top: 1px solid var(--border);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }
    .nav-menu a { padding: 12px 8px; border-radius: 10px; color: var(--text); font-size: 1rem; font-weight: 500; }
    .nav-menu a:hover { text-decoration: none; background: var(--bg-soft); }
    .nav-menu a[aria-current="page"] { color: var(--brand); }
    .nav-menu a.btn { display: none; justify-content: center; margin-top: 8px; color: #fff; }
    .nav-menu a.btn:hover { background: var(--brand-dark); }
    .nav-menu a.btn svg { width: 16px; height: 16px; }
}
/* On phones the download button moves from the bar into the menu */
@media (max-width: 520px) {
    .nav-inner { padding: 0 16px; }
    .nav-links a.nav-cta { display: none; }
    .nav-menu a.btn { display: inline-flex; }
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    padding: 14px 24px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn svg { width: 20px; height: 20px; flex-shrink: 0; }
.btn-primary { background: #6B5FF2; color: #fff; box-shadow: 0 6px 20px rgba(107, 95, 242, 0.32); }
.btn-primary:hover { background: #5B4FE2; color: #fff; }
.btn-dark { background: var(--text); color: var(--bg); }
.btn-dark:hover { color: var(--bg); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-soft); color: var(--text); }

/* ── Footer ── */
.site-footer {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    padding: 56px 0 32px;
    color: var(--text-2);
    font-size: 0.9375rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}
.footer-grid p { margin-top: 12px; max-width: 320px; font-size: 0.875rem; line-height: 1.6; }
.footer-col h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-3);
    margin-bottom: 14px;
}
.footer-col a { display: block; color: var(--text-2); margin-bottom: 10px; font-size: 0.9375rem; }
.footer-col a:hover { color: var(--text); text-decoration: none; }
.footer-bottom {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.8125rem;
    color: var(--text-3);
}
.footer-bottom .disclaimer { max-width: 520px; }

@media (max-width: 820px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > :first-child { grid-column: 1 / -1; }
}

/* ── Document pages (privacy, terms, EULA, support) ── */
.doc-hero {
    background: linear-gradient(180deg, var(--brand-tint) 0%, var(--bg) 100%);
    padding: 64px 0 40px;
}
.doc-hero .container, .doc-body .container { max-width: 800px; }
.eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--brand);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}
.doc-hero h1 {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 12px;
}
.doc-meta { color: var(--text-2); font-size: 0.9375rem; display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.lang-switch {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 3px;
    background: var(--surface);
}
.lang-switch a {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-2);
}
.lang-switch a:hover { text-decoration: none; color: var(--text); }
.lang-switch a[aria-current="page"] { background: #6B5FF2; color: #fff; }

.doc-body { padding: 16px 0 88px; }

.summary-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}
.summary-box h2 { font-size: 1.0625rem; margin: 0 0 12px; border: none; padding: 0; }

.toc {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 48px;
    background: var(--bg-soft);
}
.toc h2 { font-size: 0.8125rem !important; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-3); margin: 0 0 12px !important; border: none !important; padding: 0 !important; }
.toc ol { columns: 2; column-gap: 32px; padding-left: 20px; font-size: 0.9375rem; }
.toc li { margin-bottom: 6px; break-inside: avoid; color: var(--text-3); }
@media (max-width: 640px) { .toc ol { columns: 1; } }

.prose { font-size: 1rem; color: var(--text-2); }
.prose h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin: 48px 0 16px;
    padding-top: 8px;
}
.prose h3 { font-size: 1.0625rem; font-weight: 600; color: var(--text); margin: 28px 0 10px; }
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--text); font-weight: 600; }
.prose .callout {
    background: var(--brand-tint);
    border-left: 3px solid var(--brand);
    border-radius: 0 12px 12px 0;
    padding: 16px 20px;
    margin: 16px 0 20px;
    color: var(--text);
}
.table-wrap { overflow-x: auto; margin: 8px 0 20px; border: 1px solid var(--border); border-radius: 12px; }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.prose th, .prose td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.prose th { background: var(--bg-soft); color: var(--text); font-weight: 600; font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.05em; }
.prose tr:last-child td { border-bottom: none; }

.contact-card {
    margin-top: 56px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: var(--shadow);
}
.contact-card h3 { font-size: 1.125rem; margin-bottom: 4px; }
.contact-card p { color: var(--text-2); font-size: 0.9375rem; }

/* ── FAQ (details/summary) ── */
.faq { display: grid; gap: 12px; }
.faq details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0 22px;
    transition: box-shadow 0.2s ease;
}
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
    cursor: pointer;
    list-style: none;
    padding: 18px 0;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: '';
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--text-3);
    border-bottom: 2px solid var(--text-3);
    transform: rotate(45deg);
    transition: transform 0.2s ease;
    flex-shrink: 0;
    margin-top: -4px;
}
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: 4px; }
.faq .answer { padding: 0 0 20px; color: var(--text-2); font-size: 0.9688rem; }
.faq .answer p + p, .faq .answer p + ul, .faq .answer ul + p { margin-top: 10px; }
.faq .answer ul { margin-left: 20px; }
.faq .answer li { margin-bottom: 4px; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ── Blog ── */
.breadcrumb { font-size: 0.875rem; color: var(--text-3); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-2); }
.breadcrumb span { margin: 0 6px; }
.article-hero { background: linear-gradient(180deg, var(--brand-tint) 0%, var(--bg) 100%); padding: 48px 0 32px; }
.article-hero .container, .article-body .container { max-width: 760px; }
.article-hero h1 { font-size: clamp(2rem, 5vw, 2.75rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 16px; }
.article-hero .lede { font-size: 1.1875rem; color: var(--text-2); margin-bottom: 20px; }
.byline { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.875rem; color: var(--text-3); }
.byline strong { color: var(--text-2); font-weight: 600; }
.article-body { padding: 8px 0 72px; }
.takeaways {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 4px solid var(--green);
    border-radius: 14px;
    padding: 22px 26px;
    margin: 8px 0 32px;
    box-shadow: var(--shadow);
}
.takeaways h2 { font-size: 0.8125rem !important; text-transform: uppercase; letter-spacing: 0.08em; color: var(--green) !important; margin: 0 0 12px !important; padding: 0 !important; }
.takeaways ul { margin: 0 0 0 20px; }
.takeaways li { margin-bottom: 6px; color: var(--text); }
.article-body .toc { margin-bottom: 40px; }
.article-body .toc ol { columns: 1; }
.prose a { text-decoration: underline; text-decoration-color: var(--brand-tint-2); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--brand); }
.prose h2 { scroll-margin-top: 80px; }
.app-cta {
    margin: 40px 0;
    border-radius: 20px;
    padding: 28px;
    background: linear-gradient(135deg, var(--brand-tint-2), var(--brand-tint));
    border: 1px solid var(--border);
    display: flex;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}
.app-cta h3 { font-size: 1.125rem; margin: 0 0 4px !important; color: var(--text); }
.app-cta p { margin: 0 !important; color: var(--text-2); font-size: 0.9375rem; max-width: 440px; }
.app-cta .btn { text-decoration: none; }
.article-faq { margin-top: 48px; }
.article-faq h2 { margin-bottom: 16px !important; }
.disclaimer-note {
    margin-top: 40px;
    font-size: 0.875rem;
    color: var(--text-3);
    border-top: 1px solid var(--border);
    padding-top: 20px;
}
.related { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 64px 0; }
.related h2 { font-size: 1.5rem; letter-spacing: -0.02em; margin-bottom: 24px; }
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.post-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.post-card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--brand-tint-2); }
.post-card .tag { font-size: 0.75rem; font-weight: 700; color: var(--brand); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.post-card h3 { font-size: 1.0625rem; line-height: 1.4; margin-bottom: 8px; color: var(--text); }
.post-card p { font-size: 0.9375rem; color: var(--text-2); flex: 1; }
.post-card .more { margin-top: 14px; font-size: 0.875rem; font-weight: 600; color: var(--brand); }
.blog-section { padding: 48px 0 16px; }
.blog-section h2 { font-size: 1.375rem; letter-spacing: -0.02em; margin-bottom: 6px; }
.blog-section > .container > p { color: var(--text-2); margin-bottom: 20px; }
@media (max-width: 900px) { .post-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) {
    .post-grid { grid-template-columns: 1fr; }
    .container { padding: 0 16px; }
    .app-cta { padding: 22px; }
}