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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0a0a0f;
    color: #e0e0e8;
    line-height: 1.7;
    overflow-x: hidden;
}

/* === Hero === */
.hero {
    position: relative;
    padding: 80px 24px 60px;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 80%, rgba(168, 85, 247, 0.1) 0%, transparent 60%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 24px;
}

h1 {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.highlight {
    background: linear-gradient(135deg, #818cf8, #c084fc, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 17px;
    color: #94a3b8;
    margin-bottom: 32px;
}

.hero-check {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    padding: 14px 24px;
    text-align: left;
}

.check-icon { font-size: 28px; }

.check-text {
    display: flex;
    flex-direction: column;
}

.check-result {
    font-size: 14px;
    margin-top: 2px;
}

.check-result.ok { color: #34d399; }
.check-result.warn { color: #fbbf24; }
.check-result.err { color: #f87171; }

/* === Tabs === */
.tabs {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 0 24px;
}

.tabs-inner {
    display: flex;
    gap: 4px;
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 10px 0;
}

.tabs-inner::-webkit-scrollbar { display: none; }

.tab {
    flex-shrink: 0;
    background: transparent;
    border: 1px solid transparent;
    color: #64748b;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.tab:hover { color: #cbd5e1; background: rgba(255,255,255,0.04); }
.tab.active { color: #fff; background: rgba(99,102,241,0.2); border-color: rgba(99,102,241,0.3); }

/* === Content === */
.content {
    max-width: 820px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* === Info Cards === */
.info-card {
    display: flex;
    gap: 16px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
}

.info-icon { font-size: 28px; flex-shrink: 0; }

.info-card h2 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.info-card p, .info-card li {
    font-size: 15px;
    color: #94a3b8;
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card li {
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.info-card li::before {
    content: '•';
    position: absolute;
    left: 4px;
    color: #818cf8;
}

.warn-card {
    border-color: rgba(251, 191, 36, 0.2);
    background: rgba(251, 191, 36, 0.03);
}

kbd {
    display: inline-block;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 6px;
    padding: 2px 8px;
    font-family: 'Inter', monospace;
    font-size: 13px;
    font-weight: 600;
    color: #e2e8f0;
}

/* === Brand Sections === */
.brand-section {
    display: none;
    margin-bottom: 40px;
}

.brand-section.active { display: block; }

.brand-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.brand-header h2 { font-size: 24px; }

.brand-tag {
    font-size: 12px;
    font-weight: 600;
    color: #818cf8;
    background: rgba(99,102,241,0.1);
    padding: 4px 10px;
    border-radius: 6px;
}

/* === Steps === */
.steps { display: flex; flex-direction: column; gap: 0; }

.step {
    display: flex;
    gap: 20px;
    position: relative;
    padding-bottom: 32px;
}

.step::before {
    content: '';
    position: absolute;
    left: 22px;
    top: 48px;
    bottom: 0;
    width: 2px;
    background: rgba(99,102,241,0.2);
}

.step:last-child::before { display: none; }

.step-num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    border-radius: 12px;
    z-index: 1;
}

.step-content {
    flex: 1;
    padding-top: 8px;
}

.step-content h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
    color: #f1f5f9;
}

.step-content p {
    font-size: 15px;
    color: #94a3b8;
    margin-bottom: 8px;
}

/* === Screenshot Placeholder (mock BIOS) === */
.screenshot-placeholder {
    margin-top: 12px;
}

.screen-mock {
    background: #0d1117;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 16px 20px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

.screen-bar {
    background: rgba(99,102,241,0.15);
    color: #a5b4fc;
    padding: 6px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    font-weight: 600;
    font-size: 12px;
}

.screen-row {
    padding: 4px 0;
    color: #94a3b8;
}

.screen-row.indent { padding-left: 20px; }

.screen-row .val {
    color: #34d399;
    font-weight: 600;
}

/* === Verify Section === */
.verify-section {
    background: rgba(52, 211, 153, 0.04);
    border: 1px solid rgba(52, 211, 153, 0.15);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
}

.verify-section h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
}

.verify-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.verify-step {
    display: flex;
    align-items: center;
    gap: 14px;
}

.verify-num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(52, 211, 153, 0.15);
    color: #34d399;
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
}

.verify-step p { font-size: 15px; color: #94a3b8; }

code {
    background: rgba(255,255,255,0.06);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    color: #a5b4fc;
}

/* === FAQ === */
.faq-section {
    margin-bottom: 32px;
}

.faq-section h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
}

.faq-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    margin-bottom: 8px;
    overflow: hidden;
}

.faq-item summary {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.2s;
}

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

.faq-item summary::before {
    content: '▸';
    color: #818cf8;
    transition: transform 0.2s;
}

.faq-item[open] summary::before { transform: rotate(90deg); }

.faq-item summary:hover { background: rgba(255,255,255,0.03); }

.faq-item p {
    padding: 0 20px 16px 44px;
    font-size: 15px;
    color: #94a3b8;
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 32px 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    color: #475569;
    font-size: 14px;
}

/* === Responsive === */
@media (max-width: 600px) {
    .hero { padding: 60px 16px 40px; }
    .content { padding: 24px 16px 60px; }
    .info-card { flex-direction: column; gap: 12px; }
    .step { gap: 14px; }
    .step::before { left: 18px; }
    .step-num { width: 36px; height: 36px; font-size: 14px; }
}