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

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #121214;
    --bg-card: #18181b;
    --bg-card-hover: #1f1f23;
    --border: #27272a;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent-from: #6366f1;
    --accent-to: #06b6d4;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #22c55e;
    --error: #ef4444;
    --radius: 12px;
    --radius-sm: 8px;
    --max-width: 1100px;
    --nav-height: 64px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ── Navigation ─────────────────────────────────────────────── */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.nav.scrolled {
    border-bottom-color: var(--border);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    border-radius: 999px;
    color: white !important;
    font-weight: 600 !important;
    transition: opacity 0.2s !important;
}

.nav-cta:hover {
    opacity: 0.9;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 24px;
    padding-top: var(--nav-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 600px 400px at 50% 30%, var(--accent-glow), transparent),
        radial-gradient(ellipse 400px 300px at 80% 60%, rgba(6, 182, 212, 0.06), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 800px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.hero-badge {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-to);
    background: rgba(6, 182, 212, 0.08);
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid rgba(6, 182, 212, 0.15);
}

.hero-title {
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    background: linear-gradient(135deg, var(--text-primary) 40%, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
}

.hero-cta {
    display: inline-block;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    border-radius: 999px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 8px;
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    color: var(--text-muted);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ── Sections ────────────────────────────────────────────────── */

.section {
    padding: 100px 24px;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-to);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 60px;
}

/* ── Cards Grid ──────────────────────────────────────────────── */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: background 0.3s, transform 0.3s, border-color 0.3s;
    cursor: default;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateY(-4px);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-from);
    margin-bottom: 20px;
}

.card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}

.card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.card-meta {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

/* ── Steps ───────────────────────────────────────────────────── */

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.step {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
}

.step + .step {
    margin-top: -1px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.step:first-child {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.step-number {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-to);
    letter-spacing: 2px;
}

.step h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.step p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
}

.step-connector {
    width: 2px;
    height: 32px;
    background: linear-gradient(180deg, var(--accent-from), var(--accent-to));
    margin-left: 32px;
    opacity: 0.4;
}

/* ── Contact Form ────────────────────────────────────────────── */

.contact-form {
    max-width: 560px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-from);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-error {
    font-size: 13px;
    color: var(--error);
    display: none;
}

.form-error.visible {
    display: block;
}

.form-success {
    font-size: 14px;
    color: var(--success);
    display: none;
    align-items: center;
    gap: 8px;
}

.form-success.visible {
    display: flex;
}

.form-submit {
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    border: none;
    border-radius: 999px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.submit-spinner {
    animation: spin 1s linear infinite;
    display: inline-flex;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

.footer {
    border-top: 1px solid var(--border);
    padding: 40px 24px;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-logo {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

/* ── Animations ──────────────────────────────────────────────── */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 768px) {
    .nav-links a:not(.nav-cta) {
        display: none;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 20px;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .step {
        padding: 24px;
    }
}