/* ---------- Base / Theme ---------- */
:root {
    --bg: #0b0f19;
    --bg2: #0e1630;
    --surface: rgba(255, 255, 255, 0.08);
    --surface2: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.12);
    --text: rgba(255, 255, 255, 0.92);
    --muted: rgba(255, 255, 255, 0.70);
    --muted2: rgba(255, 255, 255, 0.55);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);

    --accent: #7c5cff;
    --accent2: #2ee5a1;
    --danger: #ff4d6d;

    --radius: 18px;
    --radius-sm: 14px;
    --container: 1120px;

    --ring: 0 0 0 4px rgba(124, 92, 255, 0.35);
    --ring2: 0 0 0 4px rgba(46, 229, 161, 0.25);

    --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
}

html[data-theme="light"] {
    --bg: #f5f7ff;
    --bg2: #eef2ff;
    --surface: rgba(255, 255, 255, 0.70);
    --surface2: rgba(255, 255, 255, 0.55);
    --border: rgba(15, 20, 35, 0.12);
    --text: rgba(15, 20, 35, 0.92);
    --muted: rgba(15, 20, 35, 0.70);
    --muted2: rgba(15, 20, 35, 0.58);
    --shadow: 0 20px 60px rgba(16, 24, 40, 0.18);

    --ring: 0 0 0 4px rgba(124, 92, 255, 0.25);
    --ring2: 0 0 0 4px rgba(46, 229, 161, 0.18);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background:
    radial-gradient(1100px 700px at 20% -10%, rgba(124, 92, 255, 0.30), transparent 60%),
    radial-gradient(900px 650px at 90% 10%, rgba(46, 229, 161, 0.22), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
    line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
    outline: none;
    box-shadow: var(--ring);
    border-radius: 12px;
}

.skip-link {
    position: absolute;
    left: 12px;
    top: 12px;
    padding: 10px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    transform: translateY(-140%);
    transition: transform 180ms ease;
    z-index: 9999;
}
.skip-link:focus { transform: translateY(0); }

.container {
    width: min(var(--container), calc(100% - 40px));
    margin: 0 auto;
}

/* ---------- Top Bar ---------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: rgba(0, 0, 0, 0.20);
    border-bottom: 1px solid var(--border);
}
html[data-theme="light"] .topbar {
    background: rgba(255, 255, 255, 0.55);
}

.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    user-select: none;
}
.brand__mark {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.9), rgba(46, 229, 161, 0.85));
    color: #0b0f19;
    font-weight: 900;
}
.brand__text { font-weight: 700; letter-spacing: 0.2px; }

.nav {
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav__link {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--muted);
    border: 1px solid transparent;
    transition: 160ms ease;
}
.nav__link:hover {
    color: var(--text);
    border-color: var(--border);
    background: var(--surface2);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text);
    cursor: pointer;
    transition: 160ms ease;
}
.theme-toggle:hover { transform: translateY(-1px); }
.theme-toggle__icon { font-size: 18px; }

/* ---------- Hero ---------- */
.hero {
    padding: 56px 0 32px;
}
.hero__inner {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 22px;
    align-items: stretch;
}

.badge {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 0.2px;
    margin: 0 0 14px;
}

h1 {
    margin: 0 0 10px;
    font-size: clamp(2rem, 3.4vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.lead {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 1.05rem;
}

.hero__cta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 0 0 16px;
}

.note {
    margin: 0;
    color: var(--muted2);
    font-size: 0.95rem;
}

.hero__panel {
    position: relative;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: linear-gradient(180deg, var(--surface), transparent);
    box-shadow: var(--shadow);
    overflow: hidden;
    padding: 18px;
    min-height: 220px;
    display: grid;
    gap: 12px;
    align-content: start;
}

.stat {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface2);
    padding: 14px;
}
.stat__num {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}
.stat__label {
    color: var(--muted);
    font-weight: 600;
}

.glow {
    position: absolute;
    inset: -60px;
    background:
    radial-gradient(closest-side at 30% 30%, rgba(124, 92, 255, 0.35), transparent 60%),
    radial-gradient(closest-side at 80% 30%, rgba(46, 229, 161, 0.22), transparent 60%);
    filter: blur(22px);
    opacity: 0.9;
    pointer-events: none;
}

/* ---------- Sections ---------- */
.section { padding: 46px 0; }
.section--alt {
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.12), transparent);
}
html[data-theme="light"] .section--alt {
    background: linear-gradient(180deg, transparent, rgba(16,24,40,0.06), transparent);
}

.section__head {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
}
h2 {
    margin: 0;
    font-size: clamp(1.5rem, 2.2vw, 2rem);
    letter-spacing: -0.02em;
}
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

/* ---------- Grid / Cards ---------- */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.card {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 18px;
    display: grid;
    gap: 12px;
    min-height: 280px;
    transition: 180ms ease;
}
.card:hover { transform: translateY(-4px); }

.card__top {
    display: flex;
    align-items: center;
    gap: 12px;
}
.icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--surface2);
    display: grid;
    place-items: center;
}
.icon svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
    color: var(--text);
    opacity: 0.92;
}
h3 { margin: 0; font-size: 1.2rem; }
.card__desc { margin: 0; color: var(--muted); }

.list {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}
.list li { margin: 6px 0; }

.card__actions {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: auto;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text);
    cursor: pointer;
    font-weight: 700;
    transition: 160ms ease;
}

.btn:hover { transform: translateY(-1px); }
.btn--small { padding: 10px 12px; border-radius: 12px; font-weight: 700; }

.btn--primary {
    border-color: rgba(124, 92, 255, 0.55);
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(46, 229, 161, 0.85));
    color: #0b0f19;
}
.btn--primary:focus-visible { box-shadow: var(--ring2); }

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

/* ---------- Callout ---------- */
.callout {
    margin-top: 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(46, 229, 161, 0.10));
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.callout__copy h3 { margin: 0 0 6px; }
.callout__copy p { margin: 0; }

/* ---------- Split Panels ---------- */
.split {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 14px;
}

.panel {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 18px;
}

.panel--glass {
    background: linear-gradient(180deg, var(--surface), transparent);
}

.panel__actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}

/* ---------- Checklist ---------- */
.checklist { display: grid; gap: 10px; margin-top: 10px; }
.check {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 10px 12px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--surface2);
}
.check input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }
.faq__item {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 12px 14px;
}
.faq__item summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--text);
    list-style: none;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item p {
    margin: 10px 0 0;
    color: var(--muted);
}

/* ---------- Footer ---------- */
.footer {
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

/* ---------- Reveal Animations ---------- */
.reveal {
    opacity: 0;
    transform: translateY(10px);
    transition: 500ms ease;
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
    .hero__inner { grid-template-columns: 1fr; }
    .grid { grid-template-columns: 1fr; }
    .split { grid-template-columns: 1fr; }
    .nav { display: none; }
}