/* Page-Specific Styles - Extends the core design system */

/* ============================================
   STATS BAR - Homepage & Shared
   ============================================ */

.stats-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    flex-wrap: wrap;
    padding: var(--space-10) 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 500;
    color: var(--color-accent-gold);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    color: var(--color-neutral-500);
}

/* ============================================
   PLATFORM PAGE - Engine Grid
   ============================================ */

.engine-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-neutral-200);
    overflow: hidden;
}

.engine-cell {
    background: var(--color-white);
    padding: var(--space-5) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary-900);
    transition: all var(--transition-base);
}

.engine-cell:hover {
    background: var(--color-neutral-050);
}

.engine-tag {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--color-accent-gold);
    background: rgba(184, 150, 92, 0.08);
    padding: 0.15rem 0.5rem;
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
}

/* ============================================
   PLATFORM PAGE - Binder Chips
   ============================================ */

.binder-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

.binder-chip {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-neutral-050);
    border: 1px solid var(--color-neutral-200);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-neutral-700);
    transition: all var(--transition-base);
}

.binder-chip:hover {
    border-color: var(--color-neutral-300);
    box-shadow: var(--shadow-sm);
}

.binder-code {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-accent-gold);
    background: rgba(184, 150, 92, 0.08);
    padding: 0.1rem 0.4rem;
    border-radius: var(--border-radius-sm);
    flex-shrink: 0;
}

/* ============================================
   PATENT PENDING BADGE
   ============================================ */

.patent-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-accent-gold);
    background: rgba(184, 150, 92, 0.08);
    padding: 0.2rem 0.6rem;
    border-radius: var(--border-radius-full);
    border: 1px solid rgba(184, 150, 92, 0.2);
    vertical-align: middle;
    margin-left: var(--space-2);
}

/* ============================================
   PLATFORM PAGE - Feature Rows
   ============================================ */

.feature-rows {
    max-width: 720px;
    margin: var(--space-8) auto 0;
}

.feature-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-neutral-100);
}

.feature-row:last-child {
    border-bottom: none;
}

.feature-row-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    background: rgba(184, 150, 92, 0.08);
    border-radius: var(--border-radius-md);
}

/* ============================================
   PLATFORM PAGE - Beta Badge
   ============================================ */

.beta-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(184, 150, 92, 0.1);
    border: 1px solid rgba(184, 150, 92, 0.3);
    border-radius: var(--border-radius-full);
    padding: 0.4rem 1rem;
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    color: var(--color-accent-gold-light);
    margin-bottom: var(--space-6);
}

.beta-badge .pulse-dot {
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ============================================
   ABOUT PAGE - By the Numbers
   ============================================ */

.numbers-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.number-item .number-value {
    font-family: var(--font-serif);
    font-size: var(--text-4xl);
    font-weight: 500;
    color: var(--color-primary-900);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.number-item .number-label {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-neutral-500);
}

/* ============================================
   ABOUT PAGE - Timeline
   ============================================ */

.timeline {
    position: relative;
    padding-left: var(--space-10);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent-gold) 0%, var(--color-neutral-200) 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-10);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-10) + 6px);
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-accent-gold);
}

.timeline-item:first-child::before {
    background: var(--color-accent-gold);
}

.timeline-date {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-accent-gold);
    margin-bottom: var(--space-2);
}

/* ============================================
   ABOUT PAGE - Skills Pills
   ============================================ */

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.skill-pill {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: var(--border-radius-full);
    white-space: nowrap;
}

.skill-pill--valuation {
    background: rgba(184, 150, 92, 0.08);
    color: var(--color-accent-gold-dim);
}

.skill-pill--engineering {
    background: rgba(47, 133, 90, 0.08);
    color: var(--color-success);
}

.skill-pill--data {
    background: rgba(10, 22, 40, 0.06);
    color: var(--color-primary-700);
}

/* ============================================
   ABOUT PAGE - Credentials Card
   ============================================ */

.cred-card {
    background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-800) 100%);
    padding: var(--space-8);
    color: var(--color-white);
}

.cred-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.cred-list li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: var(--text-sm);
    color: var(--color-neutral-400);
}

.cred-list li:last-child {
    border-bottom: none;
}

/* ============================================
   409A PAGE - Steps
   ============================================ */

.step-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.step-item {
    position: relative;
}

.step-number {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-widest);
    color: var(--color-accent-gold);
    margin-bottom: var(--space-3);
}

/* ============================================
   FAQ ACCORDION
   ============================================ */

.faq-list {
    max-width: 700px;
}

.faq-item {
    border-bottom: 1px solid var(--color-neutral-200);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--space-5) 0;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-primary-900);
    text-align: left;
    transition: color var(--transition-base);
}

.faq-question::after {
    content: '+';
    font-size: var(--text-xl);
    font-weight: 400;
    color: var(--color-neutral-400);
    transition: transform var(--transition-base);
    flex-shrink: 0;
    margin-left: var(--space-4);
}

.faq-item.active .faq-question::after {
    content: '−';
}

.faq-question:hover {
    color: var(--color-accent-gold-dim);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
    padding: 0 0;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 0 var(--space-5);
}

.faq-answer p {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-neutral-600);
    margin: 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .engine-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .step-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .engine-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .binder-grid {
        grid-template-columns: 1fr 1fr;
    }
    .stats-bar {
        gap: var(--space-6);
    }
    .stat-number {
        font-size: var(--text-2xl);
    }
    .numbers-grid {
        gap: var(--space-4);
    }
    .step-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .engine-grid {
        grid-template-columns: 1fr;
    }
    .binder-grid {
        grid-template-columns: 1fr;
    }
    .numbers-grid {
        grid-template-columns: 1fr;
    }
    .stats-bar {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
    }
}