/* Paperplane website: one stylesheet for every page. Tokens follow PaperplaneDesign (Colors.swift). */
:root {
    color-scheme: light dark;
    --bg: #F4F5FA;
    --surface: #FFFFFF;
    --separator: #E3E5EE;
    --text: #14152B;
    --text-2: #5C6079;
    --text-3: #6B6F8C;
    --accent: #4F46E5;
    --accent-soft: rgba(79, 70, 229, 0.08);
    --on-accent: #FFFFFF;
    --shadow: 0 1px 2px rgba(20, 21, 43, 0.04), 0 8px 24px rgba(20, 21, 43, 0.05);
    --radius: 20px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0E0F17;
        --surface: #1A1B26;
        --separator: #2E3040;
        --text: #F2F3F8;
        --text-2: #A6AAC2;
        --text-3: #8A8EB0;
        --accent: #818CF8;
        --accent-soft: rgba(129, 140, 248, 0.12);
        --on-accent: #0E0F17;
        --shadow: none;
    }
}

* { box-sizing: border-box; }

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Hiragino Sans", "Apple SD Gothic Neo",
        "Noto Sans", sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a { color: var(--accent); text-underline-offset: 2px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

/* Header: lockup on the left, language menu on the right. */
.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 20px;
    padding-bottom: 12px;
}
.brand { display: block; line-height: 0; }
.brand img { height: 40px; width: auto; }

.lang { position: relative; font-size: 15px; }
.lang summary {
    list-style: none;
    cursor: pointer;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow);
    border: 1px solid var(--separator);
    white-space: nowrap;
}
.lang summary::-webkit-details-marker { display: none; }
.lang summary::after { content: " \25BE"; color: var(--text-3); }
.lang ul {
    position: absolute;
    right: 0;
    z-index: 2;
    margin: 8px 0 0;
    padding: 6px;
    list-style: none;
    min-width: 180px;
    background: var(--surface);
    border: 1px solid var(--separator);
    border-radius: 14px;
    box-shadow: 0 12px 32px rgba(20, 21, 43, 0.14);
}
.lang li a {
    display: block;
    padding: 7px 12px;
    border-radius: 9px;
    color: var(--text);
    text-decoration: none;
}
.lang li a:hover, .lang li a:focus-visible { background: var(--accent-soft); }
.lang li a[aria-current="page"] { color: var(--accent); font-weight: 600; }

/* Content cards. */
main.wrap { padding-top: 8px; padding-bottom: 24px; }

.card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px 24px;
    margin: 0 0 16px;
}

h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 6px; }
h2 { font-size: 20px; line-height: 1.3; margin: 32px 0 8px; }
h3 { font-size: 17px; line-height: 1.35; margin: 0 0 6px; }
p, li { color: var(--text-2); }
p { margin: 0 0 12px; }
ul { padding-left: 22px; margin: 0 0 12px; }
li { margin: 0 0 6px; }
strong { color: var(--text); }

.date, .lead { color: var(--text-3); margin: 0 0 20px; }
.lead { font-size: 18px; }

.summary {
    background: var(--accent-soft);
    border-radius: 14px;
    padding: 16px 18px;
    margin: 0 0 8px;
}
.summary p { color: var(--text); margin: 0; }

.legal-caps p { font-size: 14px; }

/* Support: contact card and FAQ. */
.contact { text-align: center; }
.contact p { margin-bottom: 16px; }
.button {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 999px;
    background: var(--accent);
    color: var(--on-accent);
    font-weight: 600;
    text-decoration: none;
}
.faq h2 { margin: 28px 4px 12px; }
.faq .card { padding: 20px 22px; margin-bottom: 12px; }
.faq .card p:last-child, .card ul:last-child { margin-bottom: 0; }

/* Home page. */
.hero { text-align: center; padding: 36px 24px; }
.hero .icon { width: 96px; height: 96px; margin: 0 auto 20px; display: block; }
.hero h1 { margin-bottom: 12px; }
.hero p { margin: 0 auto; max-width: 34em; }
.links { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.links a {
    display: block;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px 22px;
    text-decoration: none;
    color: var(--text);
}
.links a strong { display: block; color: var(--accent); font-size: 17px; margin-bottom: 4px; }
.links a span { color: var(--text-2); font-size: 15px; }

footer { padding-top: 16px; padding-bottom: 40px; text-align: center; font-size: 14px; color: var(--text-3); }
footer nav { margin-bottom: 6px; }
footer nav a { margin: 0 8px; white-space: nowrap; }
footer p { color: var(--text-3); margin: 0; }

@media (max-width: 480px) {
    h1 { font-size: 26px; }
    .card { padding: 22px 18px; }
    .brand img { height: 34px; }
}