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

:root {
    --bg: #080c10;
    --surface: #0e1419;
    --surface2: #131a22;
    --border: #1e2a35;
    --accent: #00c2ff;
    --accent2: #00ffb3;
    --text: #e8edf2;
    --muted: #6c8699;
    --danger: #ff4444;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Outfit', sans-serif;
    line-height: 1.5;
    overflow-x: hidden;
    cursor: none;
}

/* CUSTOM CURSOR */
.cursor {
    position: fixed;
    width: 8px; height: 8px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 99999;
    transform: translate(-50%, -50%);
    transition: transform 0.1s, width 0.2s, height 0.2s, background 0.2s;
    mix-blend-mode: difference;
}
.cursor-ring {
    position: fixed;
    width: 32px; height: 32px;
    border: 1px solid rgba(0,194,255,0.4);
    border-radius: 50%;
    pointer-events: none;
    z-index: 99998;
    transform: translate(-50%, -50%);
    transition: all 0.15s ease;
}

/* WCAG: Skip navigation */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--accent);
    color: var(--bg);
    padding: 10px 20px;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 14px;
    z-index: 9999;
    text-decoration: none;
    border-radius: 2px;
    transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

/* WCAG: Global focus styles */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

/* WCAG: Link styles */
a { color: var(--accent); }
a:hover { color: #33cfff; }

.quote-source {
    display: inline-block;
    margin-top: 10px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    letter-spacing: 0.5px;
}
.quote-source:hover { color: #33cfff; }
.quote-source:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* WCAG: Visually hidden label utility */
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* Noise overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    background-size: 150px;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.5;
}

/* NAV */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 48px;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, background 0.3s;
}
nav.scrolled {
    background: rgba(8,12,16,0.85);
    backdrop-filter: blur(12px);
    border-color: var(--border);
}
.logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 24px;
    letter-spacing: -0.5px;
    color: var(--text);
    text-decoration: none;
}
.logo span { color: var(--accent); }
.nav-cta {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent);
    text-decoration: none;
    border: 1px solid var(--accent);
    padding: 10px 20px;
    transition: background 0.2s, color 0.2s;
}
.nav-cta:hover { background: var(--accent); color: var(--bg); }

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 140px 48px 80px;
    position: relative;
    overflow: hidden;
}

/* Grid lines background */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
    linear-gradient(rgba(0,194,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,194,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

/* Glow orb */
.hero-glow {
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0,194,255,0.06) 0%, transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-eyebrow {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(52px, 7vw, 96px);
    line-height: 1.2;
    letter-spacing: -2px;
    max-width: 900px;
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.4s;
}
.hero-headline em {
    font-style: italic;
    color: var(--accent);
}

.hero-sub {
    font-size: clamp(16px, 2vw, 20px);
    font-weight: 400;
    color: var(--muted);
    max-width: 540px;
    line-height: 1.7;
    margin-bottom: 56px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-stat-bar {
    display: flex;
    gap: 48px;
    margin-bottom: 64px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.7s;
}
.stat { border-left: 2px solid var(--border); padding-left: 20px; }
.stat-num {
    font-family: 'DM Serif Display', serif;
    font-size: 36px;
    color: var(--accent2);
    line-height: 1;
    margin-bottom: 6px;
}
.stat-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
}
.stat-label a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.stat-label a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* EMAIL FORM */
.email-form-wrap {
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.9s;
}
.email-form {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 520px;
    border: 1px solid var(--border);
    background: var(--surface);
    position: relative;
    overflow: hidden;
}
.email-form::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.6;
}
.email-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 18px 24px;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    color: var(--text);
    caret-color: var(--accent);
}
.email-input::placeholder { color: var(--muted); }
.email-btn {
    background: var(--accent);
    color: var(--bg);
    border: none;
    padding: 18px 28px;
    font-family: 'Outfit', sans-serif;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    cursor: none;
    transition: background 0.2s;
    white-space: nowrap;
}
.email-btn:hover { background: #33cfff; }
.form-note {
    margin-top: 12px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
}
.waitlist-count {
    margin-top: 10px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent2);
    letter-spacing: 0.5px;
}
.success-msg {
    display: none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    color: var(--accent2);
    padding: 18px 0;
}

/* PRODUCT PREVIEW — CAROUSEL */
.preview {
    padding: 0 48px 80px;
    position: relative;
}
.preview-inner {
    max-width: 960px;
    margin: 0 auto;
}
.carousel {
    position: relative;
}
.carousel-track {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface);
    aspect-ratio: 16 / 9;
    position: relative;
}
.carousel-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}
.carousel-slide.active {
    opacity: 1;
}
.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top left;
    display: block;
}
.carousel-nav {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 32px;
}
.carousel-btn {
    background: none;
    border: none;
    cursor: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: 6px;
    transition: background 0.2s;
    max-width: 220px;
}
.carousel-btn:hover { background: rgba(255,255,255,0.03); }
.carousel-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}
.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    transition: background 0.3s, box-shadow 0.3s;
}
.carousel-btn.active .carousel-dot {
    background: var(--accent);
    box-shadow: 0 0 8px rgba(0,194,255,0.4);
}
.carousel-label {
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--muted);
    transition: color 0.2s;
}
.carousel-btn.active .carousel-label { color: var(--text); }
.carousel-desc {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    line-height: 1.5;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s;
}
.carousel-btn.active .carousel-desc { opacity: 1; }
@media (max-width: 768px) {
    .preview { padding: 0 24px 60px; }
    .carousel-nav { gap: 12px; }
    .carousel-btn { max-width: 120px; padding: 8px; }
    .carousel-desc { font-size: 10px; }
}

/* CTA BUTTONS */
.cta-wrap {
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.9s;
}
.cta-btn-large {
    display: inline-block;
    background: var(--accent);
    color: var(--bg);
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    text-decoration: none;
    padding: 20px 48px;
    border: none;
    transition: background 0.2s, transform 0.15s;
    cursor: none;
    position: relative;
}
.cta-btn-large:hover {
    background: #33cfff;
    color: var(--bg);
    transform: translateY(-1px);
}
.cta-btn-large:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}
.cta-note {
    margin-top: 16px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.5px;
}
.cta-link-secondary {
    display: inline-block;
    margin-top: 20px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    text-decoration: none;
    letter-spacing: 1px;
    transition: color 0.2s;
}
.cta-link-secondary:hover { color: var(--accent); }
.final-cta-wrap {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* MARQUEE */
.marquee-wrap {
    overflow: hidden;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 18px 0;
    margin: 0;
    background: var(--surface);
}
.marquee-track {
    display: flex;
    gap: 0;
    animation: marquee 24s linear infinite;
    width: max-content;
}
.marquee-item {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0 40px;
    white-space: nowrap;
}
.marquee-item span { color: var(--accent); margin-right: 40px; }
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* SECTIONS */
section { padding: 120px 48px; }

.section-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 20px;
}

/* PROBLEM SECTION */
.problem {
    background: var(--surface);
    position: relative;
}
.problem-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.problem-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 24px;
}
.problem-text {
    color: var(--muted);
    line-height: 1.8;
    font-size: 16px;
    margin-bottom: 16px;
}

/* BURN METER */
.burn-card {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 40px;
    position: relative;
}
.burn-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,68,68,0.04), transparent);
    pointer-events: none;
}
.burn-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--danger);
    margin-bottom: 24px;
    text-transform: uppercase;
}
.burn-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}
.burn-item:last-child { border-bottom: none; }
.burn-name { font-size: 13px; color: var(--muted); line-height: 1.6; }
.burn-cost { font-family: 'DM Serif Display', serif; font-size: 22px; color: var(--danger); }
.burn-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--danger);
}
.burn-total-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--danger);
}
.burn-total-num {
    font-family: 'DM Serif Display', serif;
    font-size: 42px;
    color: var(--danger);
}

/* HOW IT WORKS */
.how {
    max-width: 1200px;
    margin: 0 auto;
}
.how-header { margin-bottom: 80px; }
.how-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1.2;
    letter-spacing: -1px;
    max-width: 600px;
}
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}
.step {
    background: var(--surface);
    padding: 40px 36px;
    position: relative;
    transition: background 0.3s;
}
.step:hover { background: var(--surface2); }
.step::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    height: 2px;
    width: 0;
    background: var(--accent);
    transition: width 0.4s ease;
}
.step:hover::after { width: 100%; }
.step-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 72px;
    font-weight: 300;
    color: #4a6a82;
    line-height: 1;
    margin-bottom: 24px;
    transition: color 0.3s;
}
.step:hover .step-num { color: #3d5a73; }
.step-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 14px;
}
.step-text { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* DIFFERENTIATOR */
.diff {
    background: var(--bg);
}
.diff-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.diff-header {
    margin-bottom: 64px;
}
.diff-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(36px, 4vw, 56px);
    line-height: 1.2;
    letter-spacing: -1px;
    max-width: 700px;
    margin-bottom: 24px;
}
.diff-headline em {
    font-style: italic;
    color: var(--accent);
}
.diff-sub {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.8;
    max-width: 620px;
}
.diff-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
}
.diff-col {
    padding: 40px 36px;
    position: relative;
}
.diff-col--generic {
    background: var(--surface);
    border-top: 2px solid var(--border);
}
.diff-col--vantage {
    background: var(--surface);
    border-top: 2px solid var(--accent);
}
.diff-col-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 28px;
}
.diff-col--generic .diff-col-label { color: var(--muted); }
.diff-col--vantage .diff-col-label { color: var(--accent); }
.diff-col--vantage .diff-col-label span { color: var(--accent); }
.diff-row {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.diff-row:last-child { border-bottom: none; }
.diff-icon {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
    line-height: 1.6;
}
.diff-icon--no { color: var(--muted); }
.diff-icon--yes { color: var(--accent2); }
.diff-item {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}
.diff-col--vantage .diff-item { color: var(--text); }
.diff-footnote {
    margin-top: 48px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.5px;
    text-align: center;
}
@media (max-width: 768px) {
    .diff-grid { grid-template-columns: 1fr; }
}

/* MID-PAGE CTA */
.mid-cta {
    text-align: center;
    padding: 60px 48px 80px;
}
@media (max-width: 768px) {
    .mid-cta { padding: 40px 24px 60px; }
}

/* FEATURES GRID */
.features {
    background: var(--bg);
}
.features-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.features-header {
    margin-bottom: 64px;
}
.features-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(32px, 4vw, 48px);
    line-height: 1.2;
    letter-spacing: -1px;
    max-width: 650px;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}
.feature-card {
    background: var(--surface);
    padding: 40px 36px;
    transition: background 0.3s;
    position: relative;
}
.feature-card:hover { background: var(--surface2); }
.feature-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    height: 2px;
    width: 0;
    background: var(--accent);
    transition: width 0.4s ease;
}
.feature-card:hover::after { width: 100%; }
.feature-icon {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 20px;
    line-height: 1;
}
.feature-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
}
.feature-text {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
}
@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
}

/* FAQ */
.faq {
    background: var(--bg);
}
.faq-inner {
    max-width: 780px;
    margin: 0 auto;
}
.faq-header {
    margin-bottom: 48px;
}
.faq-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(32px, 4vw, 48px);
    letter-spacing: -1px;
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-item:first-child {
    border-top: 1px solid var(--border);
}
.faq-question {
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    padding: 24px 0;
    cursor: none;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
    content: '+';
    font-family: 'IBM Plex Mono', monospace;
    font-size: 20px;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform 0.2s;
}
.faq-item[open] .faq-question::after {
    content: '−';
}
.faq-answer {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.8;
    padding: 0 0 24px;
    max-width: 680px;
}

/* TESTIMONIALS */
.quotes {
    background: var(--surface);
}
.quotes-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.quotes-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(32px, 4vw, 48px);
    letter-spacing: -1px;
    margin-bottom: 64px;
}
.quote-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}
.quote-card {
    background: var(--bg);
    padding: 40px;
    border-left: 2px solid var(--border);
    transition: border-color 0.3s;
}
.quote-card:hover { border-color: var(--accent); }
.quote-text {
    font-family: 'DM Serif Display', serif;
    font-style: italic;
    font-size: 20px;
    line-height: 1.5;
    margin-bottom: 28px;
    color: var(--text);
}
.quote-author {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
}
.quote-author strong { color: var(--accent2); display: block; margin-bottom: 4px; font-size: 12px; }

/* FINAL CTA */
.final-cta {
    text-align: center;
    position: relative;
    overflow: hidden;
}
.final-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 80% at 50% 100%, rgba(0,194,255,0.06), transparent);
}
.final-headline {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(40px, 6vw, 80px);
    line-height: 1.2;
    letter-spacing: -2px;
    margin-bottom: 24px;
    position: relative;
}
.final-headline em { font-style: italic; color: var(--accent); }
.final-sub {
    color: var(--muted);
    font-size: 16px;
    margin-bottom: 48px;
    position: relative;
}
.final-form-wrap { position: relative; display: flex; justify-content: center; }
.final-form {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 500px;
    width: 100%;
    border: 1px solid var(--border);
    background: var(--surface);
    position: relative;
    overflow: hidden;
}
.final-form::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent2), transparent);
    opacity: 0.6;
}

/* FOOTER */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
footer p {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
}
footer a { color: var(--accent); text-decoration: none; }

/* ANIMATIONS */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* BLINKING CURSOR */
.blink {
    display: inline-block;
    width: 3px;
    height: 0.85em;
    background: var(--accent);
    vertical-align: middle;
    animation: blink 1s step-end infinite;
    margin-left: 4px;
}
@keyframes blink { 50% { opacity: 0; } }

/* Responsive */
@media (max-width: 768px) {
    nav { padding: 20px 24px; }
    .hero { padding: 120px 24px 60px; }
    section { padding: 80px 24px; }
    .problem-inner { grid-template-columns: 1fr; gap: 40px; }
    .steps { grid-template-columns: 1fr; gap: 2px; }
    .quote-grid { grid-template-columns: 1fr; }
    .hero-stat-bar { gap: 24px; flex-wrap: wrap; }
    footer { flex-direction: column; gap: 16px; text-align: center; }
    .features-grid { grid-template-columns: 1fr; }
    .nav-cta { font-size: 11px; padding: 8px 14px; }
}

/* ── Check Our Math button ── */
.check-math-btn {
    background: transparent;
    border: 1px solid rgba(0,194,255,0.35);
    color: var(--accent);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    padding: 8px 18px;
    border-radius: 4px;
    cursor: none;
    transition: background 0.2s, border-color 0.2s;
}
.check-math-btn:hover {
    background: rgba(0,194,255,0.08);
    border-color: var(--accent);
}
.check-math-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ── Modal overlay ── */
#math-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(4,8,12,0.88);
    backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
    padding: 24px;
}
#math-modal.open { display: flex; }
#math-modal, #math-modal * { cursor: none; }
.math-modal-box {
    background: #0d1520;
    border: 1px solid rgba(0,194,255,0.2);
    border-radius: 12px;
    max-width: 680px;
    width: 100%;
    max-height: 88vh;
    overflow-y: auto;
    padding: 40px 44px;
    position: relative;
}
.math-modal-box::-webkit-scrollbar { width: 4px; }
.math-modal-box::-webkit-scrollbar-track { background: transparent; }
.math-modal-box::-webkit-scrollbar-thumb { background: rgba(0,194,255,0.2); border-radius: 2px; }
.math-close {
    position: absolute;
    top: 16px; right: 20px;
    background: none; border: none;
    color: var(--muted); font-size: 22px;
    cursor: none; line-height: 1;
    padding: 4px 8px;
}
.math-close:hover { color: var(--fg); }
.math-close:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.math-modal-title {
    font-family: 'DM Serif Display', serif;
    font-size: 26px;
    color: var(--fg);
    margin: 0 0 6px;
}
.math-modal-subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    margin: 0 0 32px;
    letter-spacing: 0.05em;
}
.math-line {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 18px 0;
}
.math-line:last-of-type { border-bottom: none; }
.math-line-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
}
.math-line-name {
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: var(--fg);
}
.math-line-cost {
    font-family: 'DM Serif Display', serif;
    font-size: 20px;
    color: #ff4d4d;
    flex-shrink: 0;
    margin-left: 16px;
}
.math-line-calc {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent2);
    margin-bottom: 6px;
}
.math-line-detail {
    font-family: 'Outfit', sans-serif;
    font-size: 12px;
    color: var(--muted);
    line-height: 1.6;
}
.math-line-detail a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.math-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(0,194,255,0.25);
}
.math-total-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.math-total-num {
    font-family: 'DM Serif Display', serif;
    font-size: 32px;
    color: #ff4d4d;
}
.math-disclaimer {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    line-height: 1.7;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.05);
}
@media (max-width: 600px) {
    .math-modal-box { padding: 28px 22px; }
    .math-modal-title { font-size: 20px; }
}

/* BLOG */
.blog-page, .blog-page body { cursor: auto; }
.blog-header { padding: 140px 48px 40px; max-width: 780px; margin: 0 auto; }
.blog-back {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px; color: var(--accent);
    text-decoration: none; letter-spacing: 1px;
}
.blog-back:hover { color: #33cfff; }
.blog-title {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.2; letter-spacing: -1px;
    margin: 24px 0 16px;
}
.blog-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px; color: var(--muted);
    letter-spacing: 0.5px; margin-bottom: 48px;
}
.blog-meta span { margin-right: 24px; }
.blog-content {
    max-width: 780px; margin: 0 auto; padding: 0 48px 80px;
    font-size: 17px; line-height: 1.8; color: var(--text);
}
.blog-content h2 {
    font-family: 'DM Serif Display', serif;
    font-size: 28px; margin: 48px 0 16px; color: var(--text);
}
.blog-content h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 20px; font-weight: 700; margin: 36px 0 12px;
}
.blog-content p { margin-bottom: 20px; }
.blog-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.blog-content code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 14px; background: var(--surface2);
    padding: 2px 6px; border-radius: 3px;
}
.blog-content pre {
    background: var(--surface); border: 1px solid var(--border);
    padding: 24px; overflow-x: auto; margin: 24px 0;
    border-radius: 4px;
}
.blog-content pre code { background: none; padding: 0; }
.blog-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 20px; margin: 24px 0;
    color: var(--muted); font-style: italic;
}
.blog-content ul, .blog-content ol { margin: 16px 0; padding-left: 24px; }
.blog-content li { margin-bottom: 8px; }
.blog-content img { max-width: 100%; border-radius: 4px; margin: 24px 0; }

/* BLOG INDEX */
.blog-index-header {
    padding: 140px 48px 60px; max-width: 900px; margin: 0 auto;
}
.blog-index-title {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(40px, 5vw, 64px);
    line-height: 1.2; letter-spacing: -1px; margin-bottom: 12px;
}
.blog-index-sub {
    font-size: 16px; color: var(--muted); margin-bottom: 8px;
}
.blog-list {
    max-width: 900px; margin: 0 auto; padding: 0 48px 80px;
}
.blog-card {
    border-bottom: 1px solid var(--border);
    padding: 36px 0;
    transition: border-color 0.3s;
}
.blog-card:hover { border-color: var(--accent); }
.blog-card:last-child { border-bottom: none; }
.blog-card a { text-decoration: none; }
.blog-card-title {
    font-family: 'DM Serif Display', serif;
    font-size: 24px; color: var(--text); margin-bottom: 8px;
    transition: color 0.2s;
}
.blog-card:hover .blog-card-title { color: var(--accent); }
.blog-card-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; color: var(--muted);
    letter-spacing: 0.5px; margin-bottom: 12px;
}
.blog-card-meta span { margin-right: 20px; }
.blog-card-excerpt {
    font-size: 15px; color: var(--muted); line-height: 1.7; margin-bottom: 12px;
}
.blog-card-link {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px; color: var(--accent);
    letter-spacing: 0.5px;
}
.blog-empty {
    text-align: center; padding: 80px 48px;
    color: var(--muted); font-size: 16px;
}

@media (max-width: 768px) {
    .blog-header, .blog-content { padding-left: 24px; padding-right: 24px; }
    .blog-index-header, .blog-list { padding-left: 24px; padding-right: 24px; }
}