/* ══════════════════════════════════════════════════════════════
   VC-X Sonar — Landing Page
   Section rhythm: Dark → White → Tinted → Dark → White → Gray → Dark
   Ref: Dart AI, Linear, Vercel, Stripe
   ══════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.lp-page {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #111827;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
.lp-container { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }

/* ══════════ HEADER ══════════ */
.lp-header {
    position: fixed; top: 0; left: 0; right: 0;
    height: 72px; z-index: 100;
    display: flex; align-items: center;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: all 0.3s;
}
.lp-header > .lp-container { display: flex; align-items: center; width: 100%; gap: 2rem; }
.lp-logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.lp-logo-img { height: 28px; filter: brightness(0) invert(1); transition: filter 0.3s; }
.lp-nav { display: flex; gap: 2rem; margin: 0 auto; }
.lp-nav a { color: rgba(255,255,255,0.65); text-decoration: none; font-size: 0.9375rem; font-weight: 500; transition: color 0.15s; }
.lp-nav a:hover { color: #fff; }
.lp-header-ctas { display: flex; gap: 0.75rem; align-items: center; flex-shrink: 0; }

.lp-header-scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom-color: #e5e7eb;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.lp-header-scrolled .lp-logo-img { filter: none; }
.lp-header-scrolled .lp-nav a { color: #4b5563; }
.lp-header-scrolled .lp-nav a:hover { color: #111827; }
.lp-header-scrolled .lp-btn-ghost { color: #111827; border-color: #d1d5db; }
.lp-header-scrolled .lp-btn-ghost:hover { background: #f3f4f6; }
.lp-header-scrolled .lp-mobile-toggle span { background: #111827; }

.lp-mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; flex-direction: column; gap: 5px; }
.lp-mobile-toggle span { width: 22px; height: 2px; background: #fff; display: block; border-radius: 1px; transition: all 0.3s; }

/* ══════════ BUTTONS ══════════ */
.lp-btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.5rem; font-weight: 600; text-decoration: none;
    border-radius: 8px; transition: all 0.2s; cursor: pointer; white-space: nowrap;
}
.lp-btn-primary { background: #27D196; color: #fff; border: 1px solid #27D196; padding: 0 1.25rem; font-size: 0.9375rem; height: 40px; }
.lp-btn-primary:hover { background: #1EAE7A; border-color: #1EAE7A; box-shadow: 0 4px 16px rgba(39,209,150,0.3); transform: translateY(-1px); }
.lp-btn-ghost { background: transparent; color: rgba(255,255,255,0.85); border: 1px solid rgba(255,255,255,0.2); padding: 0 1.25rem; font-size: 0.9375rem; height: 40px; }
.lp-btn-ghost:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.4); color: #fff; }
.lp-btn-outline { background: transparent; color: rgba(255,255,255,0.85); border: 1px solid rgba(255,255,255,0.25); padding: 0 1.5rem; font-size: 0.9375rem; height: 48px; }
.lp-btn-outline:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.5); color: #fff; }
.lp-btn-lg { height: 48px; padding: 0 2rem; font-size: 1rem; }

/* ══════════ HERO — Dark ══════════ */
.lp-hero {
    background: linear-gradient(160deg, #0a0e1a 0%, #111827 50%, #0f172a 100%);
    color: #fff; position: relative; min-height: 100vh;
    display: flex; align-items: center;
}
.lp-hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.lp-grid-svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.4; }
.lp-glow { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.12; animation: lp-drift 25s ease-in-out infinite; }
.lp-glow-1 { width: 500px; height: 500px; background: #27D196; top: -15%; right: 5%; }
.lp-glow-2 { width: 350px; height: 350px; background: #4253A0; bottom: 5%; left: -5%; animation-delay: -8s; }
.lp-glow-3 { width: 250px; height: 250px; background: #E10244; top: 45%; right: -8%; animation-delay: -16s; }
@keyframes lp-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -25px) scale(1.05); }
    66% { transform: translate(-20px, 15px) scale(0.95); }
}
.lp-hero-content { position: relative; z-index: 1; text-align: center; padding: 10rem 0 5rem; }
.lp-hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(39,209,150,0.12); color: #27D196; padding: 0.375rem 1rem; border-radius: 100px; font-size: 0.8125rem; font-weight: 600; margin-bottom: 1.5rem; }
.lp-hero h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.1; margin-bottom: 1.25rem; letter-spacing: -0.03em; }
.lp-gradient-text { background: linear-gradient(135deg, #27D196, #4253A0); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.lp-hero-sub { font-size: 1.125rem; color: rgba(255,255,255,0.6); max-width: 620px; margin: 0 auto 2.5rem; line-height: 1.7; }
.lp-hero-ctas { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.lp-hero-stats { display: flex; justify-content: center; gap: 3rem; margin-top: 4rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.06); }
.lp-stat { text-align: center; }
.lp-stat-number { display: block; font-size: 1.75rem; font-weight: 800; color: #27D196; }
.lp-stat-label { font-size: 0.75rem; color: rgba(255,255,255,0.45); margin-top: 0.25rem; display: block; }
.lp-stat-divider { width: 1px; background: rgba(255,255,255,0.08); }

/* ══════════ TRUST — White ══════════ */
.lp-trust { padding: 2rem 0; background: #fff; border-bottom: 1px solid #f3f4f6; }
.lp-trust-label { text-align: center; font-size: 0.6875rem; font-weight: 700; color: #9ca3af; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1rem; }
.lp-trust-items { display: flex; justify-content: center; gap: 2.5rem; flex-wrap: wrap; align-items: center; }
.lp-trust-logo { font-size: 0.875rem; font-weight: 700; color: #c0c5cc; transition: color 0.2s; }
.lp-trust-logo:hover { color: #6b7280; }

/* ══════════ SECTION HEADER (reusable) ══════════ */
.lp-section-header { text-align: center; max-width: 600px; margin: 0 auto 3rem; }
.lp-section-badge { display: inline-block; font-size: 0.6875rem; font-weight: 700; color: #27D196; background: rgba(39,209,150,0.08); padding: 0.25rem 0.75rem; border-radius: 100px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.75rem; }
.lp-section-header h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
.lp-section-header p { font-size: 1rem; color: #6b7280; line-height: 1.6; }

/* Dark section header overrides */
.lp-benefits .lp-section-header h2,
.lp-cta-mid h2,
.lp-cta-final h2 { color: #fff; }
.lp-benefits .lp-section-header p,
.lp-cta-mid p,
.lp-cta-final p { color: rgba(255,255,255,0.55); }
.lp-benefits .lp-section-badge { background: rgba(39,209,150,0.15); }

/* ══════════ PROBLEM/SOLUTION — Soft green tint ══════════ */
.lp-problem-solution { padding: 6rem 0; background: #f0fdf4; }
.lp-ps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.lp-ps-card { background: #fff; border-radius: 12px; padding: 2rem; border: 1px solid #e5e7eb; }
.lp-ps-before { border-left: 3px solid #ef4444; }
.lp-ps-after { border-left: 3px solid #27D196; }
.lp-ps-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1rem; margin-bottom: 1rem; }
.lp-ps-icon-red { background: rgba(239,68,68,0.08); color: #ef4444; }
.lp-ps-icon-green { background: rgba(39,209,150,0.08); color: #27D196; }
.lp-ps-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 1rem; }
.lp-ps-card ul { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.lp-ps-card li { font-size: 0.9375rem; color: #374151; display: flex; gap: 0.5rem; line-height: 1.5; }
.lp-ps-before li::before { content: '✕'; color: #ef4444; font-weight: 700; flex-shrink: 0; }
.lp-ps-after li::before { content: '✓'; color: #27D196; font-weight: 700; flex-shrink: 0; }

/* ══════════ BENEFITS — Dark (strong break) ══════════ */
.lp-benefits { padding: 6rem 0; background: #111827; color: #fff; }
.lp-benefits-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.lp-benefit-card {
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px; padding: 1.75rem; transition: all 0.25s;
}
.lp-benefit-card:hover { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.15); transform: translateY(-2px); }
.lp-benefit-icon {
    width: 44px; height: 44px; border-radius: 10px;
    background: rgba(39,209,150,0.12); color: #27D196;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.125rem; margin-bottom: 1rem;
}
.lp-benefit-card h3 { font-size: 1rem; font-weight: 700; color: #f8fafc; margin-bottom: 0.5rem; }
.lp-benefit-card p { font-size: 0.875rem; color: rgba(255,255,255,0.55); line-height: 1.55; margin: 0; }

/* ══════════ FEATURES — White ══════════ */
.lp-features { padding: 6rem 0; background: #fff; }
.lp-feature-item { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; margin-bottom: 5rem; }
.lp-feature-item:last-child { margin-bottom: 0; }
.lp-feature-reverse { direction: rtl; }
.lp-feature-reverse > * { direction: ltr; }
.lp-feature-tag { display: inline-block; font-size: 0.6875rem; font-weight: 700; color: #4253A0; background: rgba(66,83,160,0.08); padding: 0.2rem 0.6rem; border-radius: 4px; margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; }
.lp-feature-text h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.lp-feature-text p { font-size: 1rem; color: #6b7280; line-height: 1.6; margin-bottom: 1.25rem; }
.lp-feature-list { list-style: none; display: flex; flex-direction: column; gap: 0.625rem; }
.lp-feature-list li { font-size: 0.9375rem; color: #374151; display: flex; align-items: center; gap: 0.5rem; }
.lp-feature-list .fa-solid { color: #27D196; font-size: 0.75rem; }
.lp-feature-visual { display: flex; justify-content: center; }
.lp-mock-card { background: #111827; border-radius: 16px; padding: 1.75rem; width: 100%; max-width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.05); }
.lp-mock-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem; padding-bottom: 0.75rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
.lp-mock-dot { width: 8px; height: 8px; border-radius: 50%; }
.lp-mock-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.875rem; }
.lp-mock-bar { height: 10px; background: linear-gradient(90deg, #27D196, #4253A0); border-radius: 5px; }
.lp-mock-row span { font-size: 0.8125rem; color: rgba(255,255,255,0.5); font-weight: 600; white-space: nowrap; }
.lp-mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
.lp-mock-stat { text-align: center; padding: 0.75rem 0; background: rgba(255,255,255,0.03); border-radius: 8px; }
.lp-mock-stat-num { display: block; font-size: 1.375rem; font-weight: 800; color: #27D196; }
.lp-mock-stat-label { font-size: 0.6875rem; color: rgba(255,255,255,0.4); margin-top: 0.125rem; display: block; }

/* ══════════ TESTIMONIALS — Light gray ══════════ */
.lp-testimonials { padding: 6rem 0; background: #f8fafc; }
.lp-testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.lp-testimonial-card {
    background: #fff; border: 1px solid #e5e7eb; border-radius: 12px;
    padding: 1.75rem; margin: 0; display: flex; flex-direction: column; transition: all 0.25s;
}
.lp-testimonial-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.lp-testimonial-metric { display: flex; align-items: baseline; gap: 0.5rem; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid #f3f4f6; }
.lp-testimonial-number { font-size: 1.75rem; font-weight: 800; color: #27D196; }
.lp-testimonial-metric-label { font-size: 0.75rem; color: #6b7280; }
.lp-testimonial-card > p { font-size: 0.9375rem; color: #374151; line-height: 1.6; font-style: italic; flex: 1; margin: 0 0 1.25rem; }
.lp-testimonial-card footer { display: flex; flex-direction: column; gap: 0.125rem; }
.lp-testimonial-card footer strong { font-size: 0.875rem; color: #111827; }
.lp-testimonial-card footer span { font-size: 0.75rem; color: #6b7280; }

/* ══════════ CTA MID — Dark gradient ══════════ */
.lp-cta-mid { padding: 5rem 0; text-align: center; background: linear-gradient(135deg, #0f172a, #1e293b); color: #fff; }
.lp-cta-mid h2 { font-size: clamp(1.375rem, 3vw, 1.875rem); font-weight: 800; margin-bottom: 0.75rem; }
.lp-cta-mid p { font-size: 1.0625rem; color: rgba(255,255,255,0.55); margin-bottom: 2.5rem; }

/* ══════════ DIFFERENTIALS — White ══════════ */
.lp-differentials { padding: 6rem 0; background: #fff; }
.lp-diff-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.lp-diff-card { background: #f8fafc; border: 1px solid #e5e7eb; border-radius: 12px; padding: 1.75rem; transition: all 0.25s; }
.lp-diff-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.06); background: #fff; }
.lp-diff-icon { font-size: 1.25rem; color: #27D196; margin-bottom: 0.75rem; display: block; }
.lp-diff-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.lp-diff-card p { font-size: 0.875rem; color: #6b7280; line-height: 1.55; margin: 0; }

/* ══════════ FAQ — Blue tint ══════════ */
.lp-faq { padding: 6rem 0; background: #f0f9ff; }
.lp-faq-list { max-width: 720px; margin: 0 auto; }
.lp-faq-item { border-bottom: 1px solid #dbeafe; }
.lp-faq-item summary { padding: 1.25rem 0; font-size: 1rem; font-weight: 600; color: #111827; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.lp-faq-item summary::-webkit-details-marker { display: none; }
.lp-faq-item summary::after { content: '+'; font-size: 1.25rem; color: #9ca3af; transition: transform 0.2s; }
.lp-faq-item[open] summary::after { transform: rotate(45deg); }
.lp-faq-item p { padding: 0 0 1.25rem; font-size: 0.9375rem; color: #6b7280; line-height: 1.6; margin: 0; }

/* ══════════ CTA FINAL — Darkest ══════════ */
.lp-cta-final { padding: 6rem 0; text-align: center; background: #0a0e1a; color: #fff; }
.lp-cta-final h2 { font-size: clamp(1.375rem, 3vw, 2.125rem); font-weight: 800; margin-bottom: 0.75rem; }
.lp-cta-final p { font-size: 1.0625rem; color: rgba(255,255,255,0.55); margin-bottom: 2.5rem; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ══════════ FOOTER — Dark ══════════ */
.lp-footer { background: #111827; color: rgba(255,255,255,0.5); padding: 4rem 0 2rem; }
.lp-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2.5rem; }
.lp-footer-brand .lp-logo-img { filter: brightness(0) invert(1); margin-bottom: 1rem; }
.lp-footer-brand p { font-size: 0.875rem; line-height: 1.6; }
.lp-footer-col h4 { color: #fff; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }
.lp-footer-col a { display: block; font-size: 0.875rem; color: rgba(255,255,255,0.45); text-decoration: none; margin-bottom: 0.625rem; transition: color 0.2s; }
.lp-footer-col a:hover { color: #fff; }
.lp-footer-social { display: flex; gap: 1rem; margin-top: 1.25rem; }
.lp-footer-social a { color: rgba(255,255,255,0.35); font-size: 1.125rem; transition: color 0.2s; text-decoration: none; }
.lp-footer-social a:hover { color: #27D196; }
.lp-footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 2rem; text-align: center; }
.lp-footer-bottom small { font-size: 0.75rem; color: rgba(255,255,255,0.3); }

/* ══════════ RESPONSIVE ══════════ */
@media (max-width: 1024px) {
    .lp-benefits-grid { grid-template-columns: 1fr 1fr; }
    .lp-diff-grid { grid-template-columns: 1fr 1fr; }
    .lp-testimonial-grid { grid-template-columns: 1fr 1fr; }
    .lp-feature-item { grid-template-columns: 1fr; gap: 2.5rem; }
    .lp-feature-reverse { direction: ltr; }
}
@media (max-width: 768px) {
    .lp-nav, .lp-header-ctas { display: none; }
    .lp-mobile-toggle { display: flex; }
    .lp-nav-open {
        display: flex !important; flex-direction: column;
        position: absolute; top: 72px; left: 0; right: 0;
        background: #fff; padding: 1rem 1.5rem;
        box-shadow: 0 4px 16px rgba(0,0,0,0.1); gap: 0;
    }
    .lp-nav-open a { color: #111827 !important; padding: 0.875rem 0; border-bottom: 1px solid #f3f4f6; font-size: 1rem; }
    .lp-ctas-open {
        display: flex !important; flex-direction: column;
        position: absolute; top: calc(72px + 220px); left: 0; right: 0;
        background: #fff; padding: 1rem 1.5rem;
        box-shadow: 0 4px 16px rgba(0,0,0,0.1); gap: 0.5rem;
    }
    .lp-ctas-open .lp-btn-ghost { color: #111827; border-color: #d1d5db; width: 100%; justify-content: center; }
    .lp-ctas-open .lp-btn-primary { width: 100%; justify-content: center; }
    .lp-ps-grid, .lp-benefits-grid, .lp-diff-grid, .lp-testimonial-grid { grid-template-columns: 1fr; }
    .lp-hero-stats { flex-direction: column; gap: 1.5rem; }
    .lp-stat-divider { width: 60px; height: 1px; margin: 0 auto; background: rgba(255,255,255,0.06); }
    .lp-footer-grid { grid-template-columns: 1fr; }
    .lp-hero-content { padding: 8rem 0 3rem; }
    .lp-problem-solution, .lp-benefits, .lp-features, .lp-testimonials, .lp-differentials, .lp-faq, .lp-cta-mid, .lp-cta-final { padding: 4rem 0; }
}

@media (prefers-reduced-motion: reduce) {
    .lp-glow { animation: none; }
}