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

:root {
    --bg: #0a0d12;
    --surface: #111520;
    --card: #151b27;
    --card-hover: #1a2235;
    --border: #1e2840;
    --accent: #3affc0;
    --accent2: #4f9dff;
    --accent3: #ff6b6b;
    --accent4: #ffb347;
    --text: #e8edf5;
    --muted: #7a8ba6;
    --font-head: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ─────────────────────────────
   NAV
───────────────────────────── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 4rem;
    background: rgba(10, 13, 18, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.5px;
    color: var(--text);
    text-decoration: none;
}

.nav-logo span { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

/* ─────────────────────────────
   HERO
───────────────────────────── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8rem 4rem 4rem;
    position: relative;
    overflow: hidden;
    gap: 4rem;
}

/* Subtle noise grain overlay */
.hero-noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' 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");
    pointer-events: none;
    opacity: 0.5;
}

/* Background grid lines */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(30,40,64,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30,40,64,0.3) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 100%);
}

/* Teal bloom */
.hero::after {
    content: '';
    position: absolute;
    top: -20%; left: -10%;
    width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(58,255,192,0.05) 0%, transparent 65%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    flex: 1;
    max-width: 580px;
}

/* Badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(58,255,192,0.06);
    border: 1px solid rgba(58,255,192,0.2);
    padding: 0.45rem 1rem;
    font-family: var(--font-head);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeUp 0.6s 0.1s ease forwards;
}

.badge-dot {
    width: 7px; height: 7px;
    background: var(--accent);
    border-radius: 50%;
    animation: blink 1.4s infinite;
}

.hero-title {
    font-family: var(--font-head);
    font-size: clamp(3.5rem, 7vw, 6.5rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -3px;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeUp 0.6s 0.25s ease forwards;
}

.outline-text {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--accent);
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--muted);
    line-height: 1.85;
    max-width: 480px;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeUp 0.6s 0.4s ease forwards;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.6s 0.55s ease forwards;
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--accent);
    color: #0a0d12;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.3px;
    padding: 0.85rem 1.8rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(58,255,192,0.25);
}

.btn-primary svg { transition: transform 0.2s; }
.btn-primary:hover svg { transform: translateX(4px); }

.btn-ghost {
    display: inline-flex;
    align-items: center;
    color: var(--muted);
    font-family: var(--font-head);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.3px;
    transition: color 0.2s;
}

.btn-ghost:hover { color: var(--text); }

/* ─────────────────────────────
   HERO DEVICE MOCKUP
───────────────────────────── */
.hero-device {
    position: relative;
    flex-shrink: 0;
    z-index: 2;
    opacity: 0;
    animation: fadeIn 0.8s 0.5s ease forwards;
}

.device-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 360px; height: 360px;
    background: radial-gradient(circle, rgba(79,157,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.device-body {
    display: flex;
    gap: 2rem;
    align-items: center;
}

/* Dashboard card */
.device-screen {
    background: var(--card);
    border: 1px solid var(--border);
    width: 280px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    position: relative;
    box-shadow: 0 0 0 1px var(--border), 0 24px 60px rgba(0,0,0,0.5);
}

.device-screen::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(to right, var(--accent), var(--accent2));
}

.screen-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.screen-title {
    font-family: var(--font-head);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.screen-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

.screen-status.good { color: var(--accent); }
.screen-status.bad  { color: var(--accent3); }

.screen-angle-block {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
    padding: 1rem;
}

.angle-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.4rem;
}

.angle-value {
    font-family: var(--font-head);
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -2px;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.8rem;
    transition: color 0.4s;
}

.angle-bar-track {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.4rem;
}

.angle-bar-fill {
    height: 100%;
    width: 30%;
    background: linear-gradient(to right, var(--accent), var(--accent2));
    border-radius: 2px;
    transition: width 0.5s ease, background 0.4s;
}

.angle-range {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--muted);
}

.screen-sensors {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.sensor-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.s-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}

.s-dot.green { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.s-dot.blue  { background: var(--accent2); box-shadow: 0 0 6px var(--accent2); }
.s-dot.red   { background: var(--accent3); box-shadow: 0 0 6px var(--accent3); }

.s-name { color: var(--muted); flex: 1; }

.s-val {
    color: var(--accent);
    font-weight: 600;
    transition: color 0.3s;
}

.screen-footer {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--border-light, #263350);
    text-align: center;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    letter-spacing: 0.5px;
}

/* Mini spine */
.device-spine {
    display: flex;
    justify-content: center;
}

.mini-track {
    width: 3px;
    height: 150px;
    background: linear-gradient(to bottom, var(--accent), var(--accent2));
    border-radius: 2px;
    position: relative;
    box-shadow: 0 0 12px rgba(58,255,192,0.25);
}

.mini-v {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px; height: 6px;
    background: var(--card);
    border: 1px solid var(--accent);
    border-radius: 2px;
}

.mini-sensor {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 12px; height: 12px;
    border-radius: 50%;
}

.mini-sensor.top {
    top: -6px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: pulse 2s infinite;
}

.mini-sensor.bottom {
    bottom: -6px;
    background: var(--accent2);
    box-shadow: 0 0 10px var(--accent2);
    animation: pulse2 2s infinite;
}

/* Scroll hint */
.scroll-hint {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: fadeIn 1s 1.2s ease forwards;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 1.8s infinite;
}

.scroll-hint span {
    font-family: var(--font-head);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--muted);
}

/* ─────────────────────────────
   FEATURES
───────────────────────────── */
.features {
    padding: 6rem 4rem;
    border-top: 1px solid var(--border);
}

.features-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.features-header {
    margin-bottom: 3.5rem;
}

.label {
    font-family: var(--font-head);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent2);
    margin-bottom: 0.8rem;
}

.h2 {
    font-family: var(--font-head);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5px;
    border: 1.5px solid var(--border);
}

.feat-card {
    background: var(--card);
    padding: 2.5rem 2rem;
    transition: background 0.3s;
    position: relative;
    overflow: hidden;
}

.feat-card:hover { background: var(--card-hover); }

.feat-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1.5px;
    background: transparent;
    transition: background 0.3s;
}

.feat-card:hover::after { background: var(--accent); }

.feat-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feat-icon.green { background: rgba(58,255,192,0.08); border: 1px solid rgba(58,255,192,0.2); }
.feat-icon.red   { background: rgba(255,107,107,0.08); border: 1px solid rgba(255,107,107,0.2); }
.feat-icon.blue  { background: rgba(79,157,255,0.08);  border: 1px solid rgba(79,157,255,0.2); }
.feat-icon.orange{ background: rgba(255,179,71,0.08);  border: 1px solid rgba(255,179,71,0.2); }

.feat-title {
    font-family: var(--font-head);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 0.7rem;
}

.feat-desc {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.75;
}

/* ─────────────────────────────
   FLOW STRIP
───────────────────────────── */
.flow-section {
    padding: 5rem 4rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.flow-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.flow-inner .h2 { margin-bottom: 3rem; margin-top: 0.5rem; }

.flow-strip {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
    border: 1px solid var(--border);
}

.flow-item {
    background: var(--card);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: background 0.3s;
}

.flow-item:hover { background: var(--card-hover); }

.flow-num {
    font-family: var(--font-head);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -2px;
    color: var(--border);
    line-height: 1;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.flow-item:hover .flow-num { color: rgba(58,255,192,0.15); }

.flow-body strong {
    display: block;
    font-family: var(--font-head);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.2px;
    margin-bottom: 0.25rem;
}

.flow-body span {
    font-size: 0.8rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

.flow-connector {
    padding: 0 1rem;
    position: relative;
}

.flow-connector::before {
    content: '';
    display: block;
    width: 30px;
    height: 1.5px;
    background: linear-gradient(to right, var(--accent), var(--accent2));
}

/* ─────────────────────────────
   CTA BANNER
───────────────────────────── */
.cta-section {
    padding: 6rem 4rem;
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 600px; height: 400px;
    background: radial-gradient(ellipse, rgba(58,255,192,0.05) 0%, transparent 70%);
    pointer-events: none;
}

.cta-inner {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.cta-eyebrow {
    font-family: var(--font-head);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.2rem;
}

.cta-title {
    font-family: var(--font-head);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.05;
    margin-bottom: 1.2rem;
}

.cta-sub {
    font-size: 1rem;
    color: var(--muted);
    max-width: 420px;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    color: var(--text);
    font-family: var(--font-head);
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    padding: 0.85rem 1.8rem;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: border-color 0.2s, color 0.2s;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ─────────────────────────────
   FOOTER
───────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

footer span { font-size: 0.82rem; color: var(--muted); }

.footer-links { display: flex; gap: 1.5rem; }

.footer-links a {
    font-size: 0.82rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover { color: var(--accent); }

/* ─────────────────────────────
   SCROLL REVEAL
───────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─────────────────────────────
   ANIMATIONS
───────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 10px var(--accent), 0 0 20px rgba(58,255,192,0.3); }
    50%       { box-shadow: 0 0 18px var(--accent), 0 0 36px rgba(58,255,192,0.5); }
}

@keyframes pulse2 {
    0%, 100% { box-shadow: 0 0 10px var(--accent2), 0 0 20px rgba(79,157,255,0.3); }
    50%       { box-shadow: 0 0 18px var(--accent2), 0 0 36px rgba(79,157,255,0.5); }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.3; }
}

@keyframes scrollPulse {
    0%   { transform: scaleY(1); transform-origin: top; opacity: 1; }
    100% { transform: scaleY(0); transform-origin: top; opacity: 0; }
}

/* ─────────────────────────────
   RESPONSIVE
───────────────────────────── */
@media (max-width: 1100px) {
    .features-grid { grid-template-columns: 1fr 1fr; }
    .flow-strip {
        grid-template-columns: 1fr;
    }
    .flow-connector {
        padding: 0.5rem 2rem;
        transform: rotate(90deg);
    }
}

@media (max-width: 900px) {
    nav { padding: 1rem 1.5rem; }
    .nav-links { display: none; }

    .hero {
        flex-direction: column;
        padding: 7rem 1.5rem 4rem;
        align-items: flex-start;
        gap: 3rem;
    }

    .hero-device { width: 100%; display: flex; justify-content: center; }
    .device-spine { display: none; }

    .features { padding: 4rem 1.5rem; }
    .features-grid { grid-template-columns: 1fr; }

    .flow-section { padding: 4rem 1.5rem; }

    .cta-section { padding: 4rem 1.5rem; }

    footer {
        padding: 1.5rem;
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}