/* ─────────────────────────────────────────────
   article.css — BTT alternative landing page
   Extends main.css design system
───────────────────────────────────────────── */

/* ── Layout ── */
.art-main { padding-bottom: 0; }

.art-section { padding: 5rem 0; }

.art-section-alt {
    background: rgba(255,255,255,.018);
    border-top: 1px solid var(--stroke);
    border-bottom: 1px solid var(--stroke);
}

/* ── Hero ── */
.art-hero { padding: 3rem 0 5rem; }
.art-hero-inner { max-width: 820px; }

.art-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .3rem .85rem;
    border-radius: 2rem;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--teal);
    border: 1px solid rgba(0,240,255,.22);
    background: rgba(0,240,255,.07);
    margin-bottom: 1.5rem;
}

.art-title {
    font-size: clamp(2rem,4.5vw,3.1rem);
    line-height: 1.1;
    letter-spacing: -.04em;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 1.25rem;
}

.art-lead {
    font-size: clamp(1.05rem,2vw,1.22rem);
    color: var(--muted);
    line-height: 1.65;
    letter-spacing: -.02em;
    margin-bottom: 2rem;
    max-width: 680px;
}

.art-bullets { list-style: none; display: flex; flex-direction: column; gap: .65rem; margin-bottom: 2.25rem; }
.art-bullets li { display: flex; align-items: center; gap: .65rem; font-size: 1rem; font-weight: 550; color: var(--text); letter-spacing: -.02em; }
.art-bullets li svg { flex-shrink: 0; width: 1.15rem; height: 1.15rem; color: var(--teal); }

.art-hero-actions { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

.art-secondary-link {
    font-size: .95rem;
    font-weight: 600;
    color: var(--muted);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(var(--text-rgb),.2);
    transition: color var(--transition), text-decoration-color var(--transition);
}
.art-secondary-link:hover { color: var(--text); text-decoration-color: rgba(var(--text-rgb),.5); }

.art-social-proof { font-size: .85rem; color: var(--muted-soft); font-weight: 500; letter-spacing: -.01em; }

/* ── Section headings ── */
.art-section-label {
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--orange);
    margin-bottom: .75rem;
}

.art-section-title {
    font-size: clamp(1.7rem,3.5vw,2.4rem);
    font-weight: 800;
    letter-spacing: -.04em;
    line-height: 1.12;
    color: var(--text);
    margin-bottom: 1rem;
}

.art-section-sub {
    font-size: 1.05rem;
    color: var(--muted);
    max-width: 620px;
    line-height: 1.6;
    letter-spacing: -.02em;
    margin-bottom: 3rem;
}

/* ── Reason cards ── */
.art-reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px,1fr));
    gap: 1.25rem;
}

.art-reason-card {
    background: var(--bg-panel);
    border: 1px solid var(--stroke);
    border-radius: var(--radius-xl);
    padding: 1.6rem;
    transition: border-color var(--transition), transform var(--transition), background var(--transition);
}
.art-reason-card:hover { border-color: var(--stroke-strong); background: var(--bg-panel-strong); transform: translateY(-2px); }

.art-reason-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
.art-reason-icon svg { width: 1.2rem; height: 1.2rem; }

.art-icon-orange { background: rgba(255,124,30,.12); color: var(--orange); border: 1px solid rgba(255,124,30,.2); }
.art-icon-purple { background: rgba(192,132,252,.12); color: var(--purple); border: 1px solid rgba(192,132,252,.2); }
.art-icon-teal   { background: rgba(0,240,255,.10); color: var(--teal); border: 1px solid rgba(0,240,255,.18); }
.art-icon-rose   { background: rgba(255,107,157,.10); color: var(--rose); border: 1px solid rgba(255,107,157,.18); }

.art-reason-card h3 { font-size: 1rem; font-weight: 700; letter-spacing: -.025em; color: var(--text); margin-bottom: .5rem; }
.art-reason-card p  { font-size: .9rem; color: var(--muted); line-height: 1.6; }

/* ── Feature list ── */
.art-features-list { display: flex; flex-direction: column; }

.art-feature-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--stroke);
}
.art-feature-item:last-child { border-bottom: none; }

.art-feature-icon {
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    border-radius: 1rem;
    background: rgba(124,58,237,.12);
    border: 1px solid rgba(192,132,252,.2);
    color: var(--purple);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: .1rem;
    transition: background var(--transition), border-color var(--transition);
}
.art-feature-item:hover .art-feature-icon { background: rgba(124,58,237,.22); border-color: rgba(192,132,252,.4); }
.art-feature-icon svg { width: 1.3rem; height: 1.3rem; }

.art-feature-text h3 { font-size: 1.05rem; font-weight: 700; letter-spacing: -.03em; color: var(--text); margin-bottom: .4rem; }
.art-feature-text p  { font-size: .92rem; color: var(--muted); line-height: 1.65; max-width: 620px; }

/* ── Pricing ── */
.art-pricing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 2rem; }

.art-pricing-card { position: relative; border-radius: var(--radius-2xl); padding: 2rem; overflow: hidden; }
.art-pricing-them { background: var(--bg-panel); border: 1px solid var(--stroke); }
.art-pricing-us   { background: linear-gradient(135deg,rgba(124,58,237,.15),rgba(192,132,252,.08)); border: 1px solid rgba(192,132,252,.3); }

.art-pricing-glow {
    position: absolute;
    top: -40%; right: -20%;
    width: 16rem; height: 16rem;
    border-radius: 50%;
    background: radial-gradient(circle,rgba(192,132,252,.25),transparent 70%);
    pointer-events: none;
}

.art-pricing-badge { font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: .85rem; }
.art-pricing-us .art-pricing-badge { color: var(--purple); }

.art-pricing-amount { font-size: clamp(2.5rem,5vw,3.5rem); font-weight: 800; letter-spacing: -.05em; color: var(--text); margin-bottom: 1rem; line-height: 1; }
.art-pricing-amount span { font-size: 1.1rem; font-weight: 600; color: var(--muted); letter-spacing: -.01em; }

.art-pricing-note { font-size: .88rem; color: var(--muted); line-height: 1.6; margin-bottom: 1.5rem; }

.art-pricing-cta { position: relative; z-index: 1; width: 100%; justify-content: center; height: 52px; }

.art-pricing-callout {
    background: rgba(255,124,30,.07);
    border: 1px solid rgba(255,124,30,.18);
    border-radius: var(--radius-xl);
    padding: 1.25rem 1.5rem;
    font-size: .92rem;
    color: var(--muted);
    line-height: 1.65;
}
.art-pricing-callout strong { color: var(--orange); }

/* ── Tradeoff ── */
.art-tradeoff-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.art-tradeoff-col { border-radius: var(--radius-xl); padding: 1.75rem; }
.art-tradeoff-keep { background: rgba(0,240,255,.04); border: 1px solid rgba(0,240,255,.15); }
.art-tradeoff-give { background: rgba(255,255,255,.03); border: 1px solid var(--stroke); }

.art-tradeoff-header { display: flex; align-items: center; gap: .6rem; font-size: .9rem; font-weight: 700; margin-bottom: 1.25rem; letter-spacing: -.02em; }
.art-tradeoff-keep .art-tradeoff-header      { color: var(--teal); }
.art-tradeoff-keep .art-tradeoff-header svg  { width: 1.15rem; height: 1.15rem; color: var(--teal); }
.art-tradeoff-give .art-tradeoff-header      { color: var(--muted); }
.art-tradeoff-give .art-tradeoff-header svg  { width: 1.15rem; height: 1.15rem; color: var(--muted-soft); }

.art-tradeoff-list { list-style: none; display: flex; flex-direction: column; gap: .6rem; }
.art-tradeoff-list li { font-size: .9rem; color: var(--muted); padding-left: 1rem; position: relative; line-height: 1.45; }
.art-tradeoff-list li::before { content: '—'; position: absolute; left: 0; color: var(--muted-soft); font-size: .75rem; }

/* ── Comparison table ── */
.art-table-wrap { overflow-x: auto; border-radius: var(--radius-xl); border: 1px solid var(--stroke); }

.art-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.art-table thead { background: var(--bg-panel); border-bottom: 1px solid var(--stroke-strong); }
.art-table th { padding: 1rem 1.25rem; text-align: left; font-size: .78rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
.art-table th:first-child { width: 40%; }
.art-table tbody tr { border-bottom: 1px solid var(--stroke); transition: background var(--transition); }
.art-table tbody tr:last-child { border-bottom: none; }
.art-table tbody tr:hover { background: rgba(255,255,255,.025); }
.art-table td { padding: .9rem 1.25rem; color: var(--muted); vertical-align: middle; }
.art-table td:first-child { color: var(--text); font-weight: 550; letter-spacing: -.02em; }

.art-cell-yes { display: table-cell; color: var(--teal) !important; font-weight: 600; }
.art-cell-yes svg { width: 1rem; height: 1rem; vertical-align: middle; margin-right: .3rem; }
.art-cell-partial { color: var(--muted) !important; }
.art-cell-no { color: var(--muted-soft) !important; }

/* ── FAQ ── */
.art-faq-list { display: flex; flex-direction: column; border: 1px solid var(--stroke); border-radius: var(--radius-xl); overflow: hidden; }

.art-faq-item { border-bottom: 1px solid var(--stroke); transition: background var(--transition); }
.art-faq-item:last-child { border-bottom: none; }
.art-faq-item[open] { background: rgba(255,255,255,.025); }

.art-faq-item summary {
    padding: 1.25rem 1.5rem;
    font-size: .98rem;
    font-weight: 650;
    color: var(--text);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    letter-spacing: -.025em;
    transition: color var(--transition);
    user-select: none;
}
.art-faq-item summary::-webkit-details-marker { display: none; }
.art-faq-item summary::after {
    content: '+';
    flex-shrink: 0;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--bg-panel);
    border: 1px solid var(--stroke);
    display: grid;
    place-items: center;
    font-size: 1rem;
    font-weight: 400;
    color: var(--muted);
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.art-faq-item[open] summary::after {
    content: '−';
    background: rgba(192,132,252,.15);
    border-color: rgba(192,132,252,.3);
    color: var(--purple);
}

.art-faq-item p { padding: 0 1.5rem 1.25rem; font-size: .92rem; color: var(--muted); line-height: 1.7; max-width: 700px; }

/* ── Final CTA ── */
.art-cta-section { padding: 6rem 0; text-align: center; position: relative; overflow: hidden; }
.art-cta-inner { position: relative; z-index: 1; }

.art-cta-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    width: 50rem; height: 20rem;
    border-radius: 50%;
    background: radial-gradient(ellipse,rgba(124,58,237,.25),rgba(0,240,255,.08) 50%,transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.art-cta-title { font-size: clamp(1.8rem,3.5vw,2.8rem); font-weight: 800; letter-spacing: -.045em; line-height: 1.12; margin: 0 auto .85rem; max-width: 700px; }
.art-cta-sub { font-size: 1.05rem; color: var(--muted); margin-bottom: 2.5rem; letter-spacing: -.02em; }

.art-cta-actions { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }

.art-cta-secondary-btn {
    display: inline-flex;
    align-items: center;
    height: 52px;
    padding: 0 1.4rem;
    border-radius: 1rem;
    font-size: .95rem;
    font-weight: 650;
    color: var(--muted);
    border: 1px solid var(--stroke);
    background: var(--bg-panel);
    transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
    letter-spacing: -.02em;
}
.art-cta-secondary-btn:hover { color: var(--text); border-color: var(--stroke-strong); background: var(--bg-panel-strong); transform: translateY(-1px); }

.art-cta-note { font-size: .82rem; color: var(--muted-soft); letter-spacing: -.01em; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .art-section { padding: 3.5rem 0; }
    .art-hero { padding: 2rem 0 3.5rem; }
    .art-reasons-grid { grid-template-columns: 1fr; }
    .art-pricing-grid { grid-template-columns: 1fr; }
    .art-tradeoff-grid { grid-template-columns: 1fr; }
    .art-hero-actions { flex-direction: column; align-items: flex-start; }
    .art-feature-item { flex-direction: column; gap: 1rem; }
    .art-cta-section { padding: 4rem 0; }
    .art-cta-actions { flex-direction: column; align-items: stretch; }
    .art-cta-secondary-btn { text-align: center; justify-content: center; }
    .art-table th, .art-table td { padding: .75rem .85rem; font-size: .82rem; }
    .art-faq-item summary { padding: 1rem 1.15rem; font-size: .92rem; }
    .art-faq-item p { padding: 0 1.15rem 1rem; }
}

@media (max-width: 480px) {
    .art-table-wrap { border-radius: 1rem; }
    .art-table th:first-child { width: 35%; }
}