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

:root {
    --bg: #0a0a0a;
    --bg-alt: #111111;
    --text: #e5e5e5;
    --text-muted: #888888;
    --accent: #ffffff;
    --border: #222222;
    --radius: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    height: 24px;
    width: auto;
    vertical-align: middle;
    margin-right: 8px;
    display: inline-block;
}

.logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    font-weight: 300;
    color: var(--text-muted);
}

/* Tabs */
.nav-tabs {
    display: flex;
    gap: 4px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.1);
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 120px 0 60px;
    min-height: calc(100vh - 64px - 80px);
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    font-size: 32px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 48px;
    text-align: center;
}

/* Hero Video */
.hero-video {
    max-width: 640px;
    margin: 0 auto 40px;
    border-radius: var(--radius);
    overflow: hidden;
}

.hero-video video {
    width: 100%;
    height: auto;
    display: block;
}

/* Hero */
.hero-label {
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 24px;
    text-align: center;
}

h1 {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--accent);
    margin-bottom: 24px;
    text-align: center;
}

.hero-sub {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.about-card {
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.about-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.about-card p {
    font-size: 15px;
    color: var(--text-muted);
}

/* Product Card */
.product-card {
    max-width: 560px;
    margin: 0 auto;
    padding: 48px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.product-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 4px 12px;
    border: 1px solid #2d6a4f;
    color: #52b788;
    border-radius: 100px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
}

.product-card p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.85;
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--border);
}

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

/* Contact */
.contact-text {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 16px;
}

#tab-contact .btn-outline {
    display: block;
    max-width: fit-content;
    margin: 0 auto;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 101;
    appearance: none;
    -webkit-appearance: none;
    outline: none;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
}

.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Responsive */
@media (max-width: 640px) {
    .hamburger {
        display: flex;
    }

    .nav-tabs {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
    }

    .nav-tabs.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .tab-btn {
        text-align: left;
        padding: 12px 16px;
        font-size: 15px;
    }

    .logo {
        font-size: 15px;
        gap: 6px;
    }

    .nav-logo {
        height: 20px;
    }

    .nav-inner {
        height: 56px;
    }

    .tab-content {
        padding: 80px 0 32px;
        min-height: calc(100vh - 56px - 60px);
    }

    h1 {
        font-size: 28px;
    }

    .hero-sub {
        font-size: 15px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .about-card {
        padding: 24px;
    }

    .product-card {
        padding: 32px 24px;
    }

    .tab-content h2 {
        font-size: 24px;
        margin-bottom: 32px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-links {
        gap: 16px;
    }

    .hero-video {
        max-width: 100%;
    }
}