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

:root {
    --bg: #0a0a12;
    --text: #eaeaf0;
    --muted: #9a9ab0;
    --accent1: #7c3aed;
    --accent2: #06b6d4;
    --accent3: #ec4899;
    --card-bg: rgba(255, 255, 255, 0.04);
    --border: rgba(255, 255, 255, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* === Aurora background === */
.aurora-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    filter: blur(80px);
    opacity: 0.55;
}

.aurora-bg span {
    position: absolute;
    border-radius: 50%;
    animation: float 18s ease-in-out infinite;
}

.aurora-bg span:nth-child(1) {
    width: 500px;
    height: 500px;
    background: var(--accent1);
    top: -150px;
    left: -100px;
}

.aurora-bg span:nth-child(2) {
    width: 450px;
    height: 450px;
    background: var(--accent2);
    top: 30%;
    right: -120px;
    animation-delay: -6s;
}

.aurora-bg span:nth-child(3) {
    width: 550px;
    height: 550px;
    background: var(--accent3);
    bottom: -200px;
    left: 30%;
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(60px, -40px) scale(1.1); }
    66% { transform: translate(-40px, 50px) scale(0.95); }
}

/* === Header === */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 6vw;
    backdrop-filter: blur(16px);
    background: rgba(10, 10, 18, 0.6);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.logo span {
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    transition: width 0.3s;
}

.nav a:hover {
    color: var(--text);
}

.nav a:hover::after {
    width: 100%;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.burger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}

/* === Hero === */
.hero {
    padding: 120px 6vw 100px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
    animation: fadeUp 1s ease both;
}

.gradient-text {
    background: linear-gradient(90deg, var(--accent1), var(--accent2), var(--accent3));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
    to { background-position: 200% center; }
}

.hero-subtitle {
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.2rem);
    max-width: 620px;
    margin: 0 auto 40px;
    animation: fadeUp 1s ease 0.15s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeUp 1s ease 0.3s both;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Buttons === */
.btn {
    padding: 14px 32px;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
    font-family: inherit;
}

.btn.primary {
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    color: white;
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.6);
}

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

.btn.ghost:hover {
    background: var(--card-bg);
    transform: translateY(-3px);
}

/* === Features === */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    padding: 60px 6vw;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px 28px;
    backdrop-filter: blur(12px);
    transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
    opacity: 0;
    transform: translateY(30px);
}

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

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(124, 58, 237, 0.5);
    box-shadow: 0 20px 50px rgba(124, 58, 237, 0.25);
}

.card-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.card p {
    color: var(--muted);
    font-size: 0.95rem;
}

/* === About === */
.about {
    max-width: 780px;
    margin: 0 auto;
    padding: 80px 6vw;
    text-align: center;
}

.about h2 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.about p {
    color: var(--muted);
    font-size: 1.05rem;
}

/* === CTA === */
.cta {
    max-width: 640px;
    margin: 40px auto 80px;
    padding: 60px 40px;
    text-align: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 28px;
    backdrop-filter: blur(16px);
}

.cta h2 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    margin-bottom: 12px;
}

.cta p {
    color: var(--muted);
    margin-bottom: 28px;
}

.cta-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.cta-form input {
    flex: 1;
    min-width: 220px;
    padding: 14px 22px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.cta-form input:focus {
    border-color: var(--accent1);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.15);
}

.form-message {
    margin-top: 18px;
    font-size: 0.95rem;
    color: var(--accent2);
    min-height: 1.4em;
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 32px 6vw;
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}

/* === Mobile === */
@media (max-width: 720px) {
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 10, 18, 0.95);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }

    .nav.open {
        max-height: 300px;
    }

    .nav a {
        padding: 16px 6vw;
        border-bottom: 1px solid var(--border);
    }

    .burger {
        display: flex;
    }

    .hero {
        padding: 80px 6vw 60px;
    }
}