:root {
    --bg:      #0f1117;
    --card:    #1a1d26;
    --border:  #2a2f42;
    --text:    #e2e8f0;
    --muted:   #64748b;
    --accent:  #3b82f6;
    --green:   #22c55e;
    --radius:  10px;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', monospace;
    font-size: 15px;
    min-height: 100vh;
}

/* ── Navbar ───────────────────────────────────────────────────────────────── */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.03em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-brand .brand-dot {
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
    background: #2563eb;
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.4);
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: 6px 8px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
    transform-origin: center;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ─────────────────────────────────────────────────────────────────── */

.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 24px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(42, 47, 66, 0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(42, 47, 66, 0.4) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    width: 600px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.25);
    border-radius: 99px;
    padding: 4px 14px;
    margin-bottom: 28px;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #e2e8f0 30%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1rem;
    color: var(--muted);
    margin-bottom: 40px;
    line-height: 1.6;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 6px 28px rgba(59, 130, 246, 0.5);
    transform: translateY(-1px);
}

/* ── Feature Cards ────────────────────────────────────────────────────────── */

.features {
    padding: 80px 24px 100px;
}

.features-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 4px 24px rgba(59, 130, 246, 0.08);
}

.feat-icon {
    width: 44px;
    height: 44px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.feat-icon svg {
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    letter-spacing: 0.01em;
}

.feature-card p {
    font-size: 0.82rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 20px;
}

.feature-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-card ul li {
    font-size: 0.80rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-card ul li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    opacity: 0.7;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

.footer {
    border-top: 1px solid var(--border);
    padding: 20px 24px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--muted);
}

/* ── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
    .features-inner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-inner {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(15, 17, 23, 0.97);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px;
        overflow: hidden;
        max-height: 0;
        transition: max-height 0.3s ease, padding 0.3s ease;
    }

    .nav-menu.is-open {
        display: flex;
        flex-direction: column;
        max-height: 200px;
        padding: 16px 24px;
    }

    .nav-cta {
        justify-content: center;
        padding: 12px;
    }
}