:root {
    --color-bg: #020617;
    --color-layer-soft: rgba(15, 23, 42, 0.6);
    --color-layer-strong: rgba(15, 23, 42, 0.85);
    --color-border: rgba(148, 163, 184, 0.18);
    --color-text: #e2e8f0;
    --color-muted: #94a3b8;
    --color-accent: #38bdf8;
    --color-accent-secondary: #6366f1;
    --color-accent-tertiary: #ec4899;
    --container-width: min(1100px, 90vw);
    --shadow-lg: 0 24px 48px -30px rgba(56, 189, 248, 0.45);
    --font-heading: 'Abril Fatface', 'Manrope', 'Inter', sans-serif;
    --font-body: 'Manrope', 'Inter', 'Roboto Mono', sans-serif;
}

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

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background:
        radial-gradient(circle at top right, rgba(56, 189, 248, 0.12), transparent 40%),
        radial-gradient(circle at bottom left, rgba(236, 72, 153, 0.14), transparent 45%),
        var(--color-bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
    height: auto;
}

main {
    display: block;
}

.wrapper {
    width: var(--container-width);
    margin: 0 auto;
}

.container {
    width: var(--container-width);
    margin: 0 auto;
}

.section-title {
    font-family: 'Abril Fatface', 'Manrope', 'Inter', sans-serif;
    font-size: clamp(2.1rem, 4vw, 3rem);
    margin: 0;
    text-align: center;
}

.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;
}

/* Header ---------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(2, 6, 23, 0.85);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--color-border);
}

.site-header .wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1rem 0;
}

.brand {
    font-family: 'Abril Fatface', 'Manrope', 'Inter', sans-serif;
    font-size: clamp(1.7rem, 2vw + 1rem, 2.4rem);
    letter-spacing: 0.08em;
    color: var(--color-text);
}

.menu-toggle {
    display: none;
    margin-left: auto;
    border: 1px solid var(--color-border);
    background: rgba(15, 23, 42, 0.7);
    color: var(--color-text);
    padding: 0.55rem 0.8rem;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.menu-toggle:hover {
    border-color: rgba(56, 189, 248, 0.6);
    background: rgba(15, 23, 42, 0.85);
    transform: translateY(-1px);
}

.menu-toggle i {
    font-size: 1.1rem;
}

.nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.55rem 1rem;
    border-radius: 999px;
    font-weight: 500;
    color: var(--color-muted);
    transition: color 0.3s ease, background 0.3s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--color-text);
    background: rgba(56, 189, 248, 0.12);
}

/* Hero ------------------------------------------------------------------ */

.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(4rem, 8vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 55%),
        linear-gradient(130deg, rgba(56, 189, 248, 0.08), rgba(99, 102, 241, 0.06));
    z-index: -2;
}

.hero-container {
    width: var(--container-width);
    display: grid;
    gap: 1.8rem;
    place-items: center;
}

.hero-tagline {
    letter-spacing: 0.28em;
    text-transform: uppercase;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
}

.hero-title {
    margin: 0;
    font-family: 'Abril Fatface', 'Manrope', 'Inter', sans-serif;
    font-size: clamp(2.6rem, 5vw, 4.1rem);
    line-height: 1.1;
}

.hero-lead {
    margin: 0;
    max-width: 62ch;
    color: var(--color-muted);
    font-size: clamp(1.05rem, 2.1vw, 1.25rem);
}

.hero-actions {
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.85rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 999px;
    padding: 0.75rem 1.6rem;
    font-weight: 600;
    font-size: 0.98rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.button.primary {
    background-image: linear-gradient(135deg, #38bdf8, #6366f1, #ec4899);
    color: #020617;
    box-shadow: var(--shadow-lg);
}

.button.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 22px 40px -28px rgba(99, 102, 241, 0.6);
}

.button.ghost {
    background: rgba(15, 23, 42, 0.65);
    border-color: rgba(56, 189, 248, 0.4);
    color: var(--color-text);
}

.button.ghost:hover {
    border-color: rgba(236, 72, 153, 0.6);
    color: var(--color-accent);
}

.hero-icons {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

.hero-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(15, 23, 42, 0.6);
    display: grid;
    place-items: center;
    font-size: 1.1rem;
    transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
}

.hero-icon:hover,
.hero-icon:focus-visible {
    transform: translateY(-4px);
    border-color: rgba(56, 189, 248, 0.65);
    color: var(--color-accent);
    background: rgba(15, 23, 42, 0.85);
}

#down {
    margin-top: clamp(2.5rem, 9vw, 6rem);
    font-size: 1.6rem !important;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 50%;
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    color: var(--color-text);
    transition: border-color 0.3s ease, transform 0.3s ease;
}

#down:hover {
    border-color: rgba(56, 189, 248, 0.7);
    transform: translateY(4px);
}

/* Scroll to top button -------------------------------------------------- */

#top-button {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(2, 6, 23, 0.78);
    color: var(--color-text);
    cursor: pointer;
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

#top-button:hover {
    transform: translateY(-3px);
    border-color: rgba(56, 189, 248, 0.5);
    background: rgba(2, 6, 23, 0.92);
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 900px) {
    .hero-title {
        font-size: clamp(2.3rem, 6vw, 3.4rem);
    }

    .hero-icons {
        gap: 0.75rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .nav {
        position: absolute;
        top: calc(100% + 0.75rem);
        right: 1rem;
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        background: rgba(2, 6, 23, 0.95);
        border-radius: 1rem;
        border: 1px solid var(--color-border);
        box-shadow: 0 18px 36px -18px rgba(15, 23, 42, 0.8);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

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

    .nav-link {
        width: 100%;
        padding: 0.65rem 0.9rem;
    }
}

@media (max-width: 640px) {
    .hero-tagline {
        letter-spacing: 0.2em;
        font-size: 0.78rem;
    }

    .hero-actions {
        gap: 0.75rem;
    }

    .button {
        width: 100%;
        max-width: 240px;
    }
}