/* =========================================================
   FocusFlow — Website styles
   Dark, focus-mode aesthetic matching the macOS app
   ========================================================= */

:root {
    --bg: #0b0d12;
    --bg-elev: #12151d;
    --bg-card: #161a23;
    --border: #222734;
    --text: #e8ecf4;
    --text-dim: #9aa3b2;
    --text-mute: #6b7280;
    --accent: #ff7a59;
    --accent-2: #ffb347;
    --accent-glow: rgba(255, 122, 89, 0.35);
    --radius: 14px;
    --radius-lg: 22px;
    --max: 1120px;
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "ss01", "cv11";
}

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

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 760px; }

/* ---------- Navigation ---------- */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    max-width: var(--max);
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.01em;
}

.logo:hover { color: var(--text); }

.logo-ring {
    display: inline-block;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 3px solid var(--accent);
    border-top-color: transparent;
    box-shadow: 0 0 18px var(--accent-glow);
    animation: spin 6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-dim);
    font-size: 15px;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    overflow: hidden;
    padding-bottom: 120px;
    background:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(255, 122, 89, 0.18), transparent 70%),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(255, 179, 71, 0.1), transparent 70%),
        var(--bg);
}

.hero-compact { padding-bottom: 60px; }

.hero-content {
    max-width: 880px;
    margin: 80px auto 0;
    padding: 0 24px;
    text-align: center;
}

.hero-compact .hero-content { margin-top: 60px; }

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 122, 89, 0.12);
    border: 1px solid rgba(255, 122, 89, 0.3);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    letter-spacing: 0.02em;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(42px, 7vw, 80px);
    line-height: 1.05;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #ffffff 0%, #b8bfcd 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-compact h1 { font-size: clamp(36px, 5vw, 56px); }

.hero-sub {
    font-size: clamp(17px, 2vw, 20px);
    color: var(--text-dim);
    max-width: 620px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.hero-meta {
    font-size: 14px;
    color: var(--text-mute);
    margin-top: 24px;
}

.hero-ctas {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #1a0f08;
    box-shadow: 0 10px 30px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 40px var(--accent-glow);
    color: #1a0f08;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
}

/* ---------- Features ---------- */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features h2, .cta-section h2, .content h2 {
    font-size: clamp(30px, 4vw, 44px);
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.025em;
}

.section-sub {
    text-align: center;
    color: var(--text-dim);
    font-size: 18px;
    margin-bottom: 64px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 122, 89, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.card .icon {
    font-size: 36px;
    margin-bottom: 16px;
    display: inline-block;
}

.card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.card p {
    color: var(--text-dim);
    font-size: 15px;
    line-height: 1.65;
}

/* ---------- CTA ---------- */
.cta-section {
    padding: 100px 0;
    text-align: center;
    background:
        radial-gradient(ellipse at center, rgba(255, 122, 89, 0.1), transparent 70%),
        var(--bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.cta-section p {
    color: var(--text-dim);
    font-size: 18px;
    margin: 12px 0 32px;
}

/* ---------- Content pages ---------- */
.content {
    padding: 80px 0 120px;
}

.content h2 {
    text-align: left;
    font-size: 28px;
    margin: 48px 0 16px;
}

.content h3 {
    font-size: 20px;
    margin: 28px 0 10px;
    color: var(--text);
}

.content p, .content li {
    color: var(--text-dim);
    font-size: 16px;
    line-height: 1.75;
    margin-bottom: 12px;
}

.content ul {
    padding-left: 24px;
    margin-bottom: 16px;
}

.content ul.checklist {
    list-style: none;
    padding-left: 0;
}

.content ul.checklist li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.content ul.checklist li:last-child { border-bottom: none; }

/* ---------- FAQ ---------- */
.faq {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 12px;
    transition: all 0.2s;
}

.faq[open] {
    border-color: rgba(255, 122, 89, 0.3);
    background: var(--bg-elev);
}

.faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    color: var(--text);
    list-style: none;
    position: relative;
    padding-right: 32px;
}

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

.faq summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    color: var(--accent);
    font-weight: 400;
    transition: transform 0.2s;
}

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

.faq p {
    margin-top: 14px;
    color: var(--text-dim);
    font-size: 15px;
    line-height: 1.7;
}

/* ---------- Contact card ---------- */
.contact-card {
    background: linear-gradient(135deg, rgba(255, 122, 89, 0.08), rgba(255, 179, 71, 0.04));
    border: 1px solid rgba(255, 122, 89, 0.2);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    margin: 48px 0;
}

.contact-card h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 12px;
}

.contact-card p {
    color: var(--text-dim);
    margin-bottom: 24px;
}

.contact-card .btn { margin-bottom: 16px; }

.muted { color: var(--text-mute); font-size: 14px; }

/* ---------- Footer ---------- */
.footer {
    background: var(--bg-elev);
    border-top: 1px solid var(--border);
    padding: 60px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-mute);
    margin-bottom: 16px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul a {
    color: var(--text-dim);
    font-size: 15px;
}

.footer ul a:hover { color: var(--text); }

.footer-tag {
    color: var(--text-mute);
    font-size: 14px;
    margin-top: 8px;
}

.copyright {
    text-align: center;
    color: var(--text-mute);
    font-size: 13px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

/* ---------- Mobile ---------- */
@media (max-width: 720px) {
    .nav { padding: 20px; }
    .nav-links { gap: 20px; }
    .nav-links a { font-size: 14px; }
    .features { padding: 60px 0; }
    .cta-section { padding: 60px 0; }
    .card { padding: 26px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .contact-card { padding: 28px; }
}