/* ---------- Theme tokens ---------- */
:root {
    --accent: #34c759;
    --accent-strong: #248a3d;
    --radius: 16px;
    color-scheme: light dark;
}

:root[data-theme="light"] {
    --bg: #f5f5f7;
    --bg-elevated: #ffffff;
    --text: #1d1d1f;
    --text-secondary: #6e6e73;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --header-bg: rgba(245, 245, 247, 0.8);
    --link: #248a3d;
    color-scheme: light;
}

:root[data-theme="dark"] {
    --bg: #101012;
    --bg-elevated: #1c1c1e;
    --text: #f5f5f7;
    --text-secondary: #98989d;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --header-bg: rgba(16, 16, 18, 0.8);
    --link: #34c759;
    color-scheme: dark;
}

/* ---------- Language switching ---------- */
:root[data-lang="de"] [data-lang="en"] { display: none !important; }
:root[data-lang="en"] [data-lang="de"] { display: none !important; }

/* ---------- Base ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

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

/* ---------- Header ---------- */
header.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem clamp(1rem, 4vw, 2.5rem);
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.site-header .brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    color: var(--text);
    font-size: 1.05rem;
}

.site-header .brand:hover { text-decoration: none; }

.header-controls { display: flex; align-items: center; gap: 0.4rem; }

.control-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    height: 34px;
    min-width: 34px;
    padding: 0 0.55rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-elevated);
    color: var(--text);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.3s ease;
}

.control-btn:hover { transform: scale(1.05); }
.control-btn:active { transform: scale(0.96); }

.control-btn svg { width: 17px; height: 17px; }

/* sun/moon swap */
:root[data-theme="light"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }

/* ---------- Layout ---------- */
main {
    max-width: 760px;
    margin: 0 auto;
    padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2rem) 4rem;
}

main.wide { max-width: 900px; }

h1 {
    font-size: clamp(1.9rem, 5vw, 2.8rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
}

h2 {
    font-size: 1.35rem;
    letter-spacing: -0.01em;
    margin: 2.2rem 0 0.6rem;
}

p { margin: 0.6rem 0; }

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.muted { color: var(--text-secondary); font-size: 0.9rem; }

/* ---------- Cards ---------- */
.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin: 1.2rem 0;
    transition: background 0.3s ease;
}

.highlight-card {
    border-left: 4px solid var(--accent);
}

/* ---------- Landing hero ---------- */
.hero {
    text-align: center;
    padding: clamp(2rem, 8vw, 5rem) 1rem 2rem;
}

.hero .avatar-emoji {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
}

.hero p {
    max-width: 34rem;
    margin: 0.8rem auto 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ---------- App card on landing ---------- */
.app-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.4rem;
    padding: 1.8rem;
}

.app-icon {
    width: 96px;
    height: 96px;
    border-radius: 22.5%;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
    flex-shrink: 0;
}

/* icon variant swap */
:root[data-theme="light"] .app-icon.dark-variant { display: none; }
:root[data-theme="dark"] .app-icon.light-variant { display: none; }

.app-card .app-info { flex: 1; min-width: 220px; }

.app-card h2 { margin: 0 0 0.2rem; font-size: 1.5rem; }

.app-card .app-tagline { color: var(--text-secondary); margin: 0 0 0.9rem; }

.app-links { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.pill-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    transition: transform 0.15s ease;
}

.pill-link:hover { transform: scale(1.04); text-decoration: none; }

.pill-link.primary {
    background: var(--accent);
    border-color: transparent;
    color: #fff;
}

/* ---------- Page hero (subpages) ---------- */
.page-hero {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.page-hero .app-icon { width: 64px; height: 64px; }

.page-hero .titles h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); margin: 0; }
.page-hero .titles p { margin: 0.15rem 0 0; color: var(--text-secondary); }

/* ---------- FAQ ---------- */
details {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.9rem 1.2rem;
    margin: 0.7rem 0;
    transition: background 0.3s ease;
}

details summary {
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6rem;
}

details summary::-webkit-details-marker { display: none; }

details summary::after {
    content: "+";
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

details[open] summary::after { transform: rotate(45deg); }

details p { color: var(--text-secondary); }

/* ---------- Lists in legal text ---------- */
ul { padding-left: 1.3rem; }
li { margin: 0.35rem 0; }
li::marker { color: var(--accent); }

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem clamp(1rem, 4vw, 2.5rem);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

footer .footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.2rem;
    margin-bottom: 0.8rem;
}

footer a { color: var(--text-secondary); }

/* ---------- Small screens ---------- */
@media (max-width: 480px) {
    .app-card { flex-direction: column; text-align: center; }
    .app-links { justify-content: center; }
    .page-hero { flex-direction: column; text-align: center; }
}