/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --navy: #0f172a;
    --navy-light: #1e293b;
    --gold: #f59e0b;
    --gold-dim: #d97706;
    --slate: #94a3b8;
    --white: #f8fafc;
    --card-bg: #ffffff;
    --text: #334155;
    --text-light: #64748b;
    --radius: 12px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--white);
    color: var(--text);
    line-height: 1.6;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Hero ── */
.hero {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    color: var(--white);
    padding: 80px 24px 64px;
    text-align: center;
}

.hero-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--slate);
    max-width: 600px;
    margin: 0 auto;
}

/* ── Grid ── */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
    padding: 48px 0 32px;
}

/* ── Card ── */
.card {
    background: var(--card-bg);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius);
    padding: 28px;
    transition: box-shadow .2s, transform .2s;
}

.card:hover {
    box-shadow: 0 8px 30px rgba(15, 23, 42, .08);
    transform: translateY(-2px);
}

.card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.card-head h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--navy);
}

.badge {
    flex-shrink: 0;
    display: inline-block;
    background: linear-gradient(135deg, var(--gold), var(--gold-dim));
    color: var(--navy);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 20px;
    white-space: nowrap;
}

.benefit {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

/* ── Evidence Block ── */
.evidence {
    background: #f1f5f9;
    border-radius: 8px;
    padding: 16px;
    border-left: 3px solid var(--gold);
}

.evidence h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--navy);
    margin-bottom: 8px;
}

.evidence ul {
    list-style: none;
    margin-bottom: 12px;
}

.evidence ul li {
    position: relative;
    padding-left: 16px;
    font-size: 0.88rem;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.5;
}

.evidence ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--gold);
    border-radius: 50%;
}

.refs {
    border-top: 1px solid #cbd5e1;
    padding-top: 10px;
}

.refs p {
    font-size: 0.78rem;
    color: var(--text-light);
    line-height: 1.55;
    margin-bottom: 6px;
}

.refs a {
    color: var(--gold-dim);
    word-break: break-all;
}

/* ── Disclaimer ── */
.disclaimer {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius);
    padding: 20px 28px;
    margin: 12px auto 40px;
    max-width: 1200px;
}

.disclaimer p {
    font-size: 0.88rem;
    color: #92400e;
}

/* ── Footer ── */
footer {
    background: var(--navy);
    color: var(--slate);
    text-align: center;
    padding: 32px 24px;
}

footer p { font-size: 0.9rem; margin-bottom: 6px; }
footer a { color: var(--gold); }
.copy { font-size: 0.8rem; opacity: .6; }

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 4px;
    padding-top: 24px;
    border-bottom: 2px solid #e2e8f0;
}

.tab {
    padding: 12px 28px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: color .15s, border-color .15s;
}

.tab:hover { color: var(--navy); }

.tab.active {
    color: var(--navy);
    border-bottom-color: var(--gold);
}

/* ── Tab Content ── */
.tab-content { display: none; }
.tab-content.active { display: grid; }

/* ── Promising Banner ── */
.promising-banner {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #1e1b4b, #312e81);
    color: #c7d2fe;
    border-radius: var(--radius);
    padding: 20px 28px;
    font-size: 0.92rem;
    line-height: 1.6;
    border-left: 4px solid #818cf8;
}

/* ── Promising Card Variants ── */
.card--promising {
    border-color: #c7d2fe;
}

.card--promising:hover {
    box-shadow: 0 8px 30px rgba(99, 102, 241, .1);
}

.card--promising .evidence {
    border-left-color: #818cf8;
}

.badge--promising {
    background: linear-gradient(135deg, #818cf8, #6366f1);
    color: #fff;
}

.caveat {
    font-size: 0.82rem;
    color: #b45309;
    background: #fffbeb;
    border-radius: 6px;
    padding: 8px 12px;
    margin: 10px 0;
    border-left: 3px solid #f59e0b;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .grid { grid-template-columns: 1fr; gap: 20px; }
    .hero { padding: 48px 16px 40px; }
    .card-head { flex-direction: column; }
    .tabs { overflow-x: auto; }
    .tab { padding: 10px 20px; font-size: 0.88rem; }
}