/* Arc marketing + support + privacy site
   Single shared stylesheet. System font stack, dark-first with a warm tint,
   glassy cards to echo the app's Liquid Glass look. */

:root {
    --tint: #ff6a3d;
    --tint-2: #ff9a3d;
    --bg: #0b0d12;
    --bg-2: #121620;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-strong: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.10);
    --text: #f3f5f9;
    --text-dim: #aab2c0;
    --text-faint: #717a8a;
    --radius: 18px;
    --maxw: 1080px;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
    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;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--tint-2);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 0.4em;
}

h1 {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.6rem, 3.4vw, 2.4rem);
    font-weight: 750;
}

h3 {
    font-size: 1.18rem;
    font-weight: 700;
}

p {
    margin: 0 0 1em;
}

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.muted {
    color: var(--text-dim);
}

/* ---------- Nav ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    background: rgba(11, 13, 18, 0.6);
    border-bottom: 1px solid var(--border);
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--text);
}

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

.brand .mark {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    object-fit: cover;
    display: block;
}

.hero .app-icon {
    width: 104px;
    height: 104px;
    border-radius: 24px;
    margin: 0 auto 26px;
    display: block;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

.nav-links {
    display: flex;
    gap: 26px;
    align-items: center;
}

.nav-links a {
    color: var(--text-dim);
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--text);
    text-decoration: none;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 1rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--tint), var(--tint-2));
    color: #1a0e08;
    box-shadow: 0 8px 24px rgba(255, 106, 61, 0.32);
}

.btn-ghost {
    background: var(--surface-strong);
    color: var(--text);
    border-color: var(--border);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    overflow: hidden;
    padding: 96px 0 72px;
    text-align: center;
}

.hero::before {
    content: "";
    position: absolute;
    inset: -40% 0 auto;
    height: 700px;
    background: radial-gradient(60% 60% at 50% 0%, rgba(255, 106, 61, 0.22), transparent 70%);
    pointer-events: none;
}

.hero .eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--tint-2);
    margin-bottom: 18px;
}

.hero p.lead {
    font-size: clamp(1.05rem, 2.2vw, 1.35rem);
    color: var(--text-dim);
    max-width: 620px;
    margin: 0 auto 32px;
}

.cta-row {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-note {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-faint);
}

/* ---------- Sections ---------- */
section {
    padding: 72px 0;
}

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
}

.section-head p {
    color: var(--text-dim);
    font-size: 1.08rem;
}

/* ---------- Feature grid ---------- */
.grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
    border-color: rgba(255, 106, 61, 0.4);
    background: var(--surface-strong);
}

.card .icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.4rem;
    background: rgba(255, 106, 61, 0.14);
    margin-bottom: 16px;
}

.card h3 {
    margin-bottom: 8px;
}

.card p {
    color: var(--text-dim);
    font-size: 0.97rem;
    margin: 0;
}

/* ---------- Privacy band ---------- */
.band {
    background: linear-gradient(180deg, var(--bg-2), var(--bg));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.privacy-points {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-top: 36px;
}

.privacy-points li {
    list-style: none;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
}

.privacy-points strong {
    display: block;
    margin-bottom: 4px;
}

.privacy-points span {
    color: var(--text-dim);
    font-size: 0.93rem;
}

/* ---------- CTA band ---------- */
.cta-band {
    text-align: center;
}

.cta-band .inner {
    background: linear-gradient(135deg, rgba(255, 106, 61, 0.14), rgba(255, 154, 61, 0.06));
    border: 1px solid rgba(255, 106, 61, 0.3);
    border-radius: 28px;
    padding: 56px 32px;
    box-shadow: var(--shadow);
}

/* ---------- Content pages (support / privacy) ---------- */
.page-header {
    padding: 72px 0 24px;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: "";
    position: absolute;
    inset: -20% 0 auto;
    height: 360px;
    background: radial-gradient(50% 60% at 50% 0%, rgba(255, 106, 61, 0.16), transparent 70%);
    pointer-events: none;
}

.prose {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 24px 64px;
}

.prose h2 {
    margin-top: 2em;
    scroll-margin-top: 84px;
}

.prose h3 {
    margin-top: 1.6em;
}

.prose ul {
    padding-left: 1.2em;
}

.prose li {
    margin-bottom: 0.5em;
    color: var(--text-dim);
}

.prose .updated {
    color: var(--text-faint);
    font-size: 0.9rem;
}

/* FAQ */
.faq details {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 4px 20px;
    margin-bottom: 12px;
    background: var(--surface);
}

.faq summary {
    cursor: pointer;
    font-weight: 650;
    padding: 16px 0;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.faq summary::after {
    content: "+";
    color: var(--tint-2);
    font-size: 1.4rem;
    font-weight: 400;
}

.faq details[open] summary::after {
    content: "–";
}

.faq details[open] summary {
    border-bottom: 1px solid var(--border);
}

.faq details p {
    color: var(--text-dim);
    padding: 16px 0 8px;
    margin: 0;
}

.contact-card {
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    margin-top: 32px;
}

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    color: var(--text-faint);
    font-size: 0.9rem;
}

footer .container {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
}

footer .foot-links {
    display: flex;
    gap: 22px;
}

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

@media (max-width: 620px) {
    .nav-links {
        gap: 16px;
    }
    .nav-links .nav-cta {
        display: none;
    }
    section {
        padding: 56px 0;
    }
}