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

:root {
    --color-primary: #1a1a2e;
    --color-accent: #e94560;
    --color-bg: #f8f9fa;
    --color-text: #333;
    --color-text-light: #666;
    --color-white: #fff;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1100px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navigation ── */

header {
    background: var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
}

.logo {
    color: var(--color-white);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ── Hero ── */

.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #16213e 50%, #0f3460 100%);
    color: var(--color-white);
    padding: 5rem 1.5rem 6rem;
    text-align: center;
}

.hero-content {
    max-width: 640px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* ── Buttons ── */

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    background: var(--color-accent);
    color: var(--color-white);
    border: 2px solid var(--color-accent);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(233, 69, 96, 0.35);
}

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

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

/* ── About ── */

.about {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 4rem 1.5rem;
    width: 100%;
}

.about h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.about > p {
    color: var(--color-text-light);
    max-width: 600px;
    margin-bottom: 2.5rem;
    font-size: 1.05rem;
}

.features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.feature {
    background: var(--color-white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.2s;
}

.feature:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 1.75rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.feature h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.feature p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ── CTA ── */

.cta {
    text-align: center;
    padding: 4rem 1.5rem 5rem;
}

.cta h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.cta p {
    color: var(--color-text-light);
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

/* ── Footer ── */

footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    padding: 1.5rem;
    font-size: 0.875rem;
    margin-top: auto;
}

/* ── Responsive ── */

@media (min-width: 600px) {
    .features {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero {
        padding: 6rem 2rem 7rem;
    }

    .hero h1 {
        font-size: 3.5rem;
    }
}

@media (min-width: 900px) {
    .hero h1 {
        font-size: 4rem;
    }

    .about {
        padding: 5rem 2rem;
    }

    .cta {
        padding: 5rem 2rem 6rem;
    }
}