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

:root {
    --bg: #fafafa;
    --surface: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #64648c;
    --accent: #4f46e5;
    --accent-light: #eef2ff;
    --border: #e5e5ef;
    --radius: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
}

/* Footer */
footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Document pages (privacy, support) */
.doc {
    padding: 48px 0 80px;
}

.back-link {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    margin-bottom: 32px;
}

.back-link:hover {
    text-decoration: underline;
}

.doc h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.last-updated {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.doc section {
    margin-bottom: 32px;
}

.doc h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.doc h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.doc p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.doc ul {
    color: var(--text-secondary);
    padding-left: 24px;
    margin-bottom: 12px;
}

.doc ul li {
    margin-bottom: 8px;
}

.doc a {
    color: var(--accent);
}

.doc a:hover {
    text-decoration: underline;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 12px;
}

.faq-item h3 {
    color: var(--text);
    margin-bottom: 8px;
}

.faq-item p {
    margin-bottom: 0;
}

/* Collapsible FAQ */
.faq-toggle { border-bottom: 1px solid var(--border); padding: 18px 0; }
.faq-toggle:last-child { border-bottom: none; }
.faq-toggle summary {
    font-weight: 600; font-size: 1rem; color: var(--text);
    cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-toggle summary::-webkit-details-marker { display: none; }
.faq-toggle summary::after { content: '+'; font-size: 1.25rem; color: var(--text-secondary); transition: transform 0.2s; }
.faq-toggle[open] summary::after { content: '\2212'; }
.faq-toggle .faq-answer { padding-top: 10px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.65; }

/* Feature grid */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 24px 0 32px; }
.feature-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px;
}
.feature-icon { font-size: 26px; margin-bottom: 10px; }
.feature-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.feature-card p { font-size: 0.875rem; margin-bottom: 0; }

/* Steps */
.step { display: flex; gap: 16px; margin-bottom: 22px; }
.step-num {
    flex-shrink: 0; width: 30px; height: 30px; background: var(--accent); color: #fff;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.8rem;
}
.step-content h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.step-content p { font-size: 0.9rem; margin-bottom: 0; }

/* Settings table */
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 0.875rem; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.doc th { font-weight: 600; color: var(--text); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.doc td { color: var(--text-secondary); }

/* Info cards */
.info-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 20px 24px; margin-bottom: 12px;
}
.info-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.info-card p { margin-bottom: 0; }

/* Contact box */
.contact-box {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 28px; text-align: center; margin-top: 40px;
}
.contact-box h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.contact-box p { margin-bottom: 0; }
.contact-box a { color: var(--accent); }

@media (max-width: 600px) {
    .feature-grid { grid-template-columns: 1fr; }
}