:root {
    --navy-900: #0a1628;
    --navy-800: #111d35;
    --navy-700: #1a2a4a;
    --navy-600: #243b6a;
    --blue-500: #3b82f6;
    --blue-400: #60a5fa;
    --blue-300: #93c5fd;
    --cyan-400: #22d3ee;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --radius: 8px;
    --radius-lg: 12px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--navy-900);
    color: var(--gray-100);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ─── Nav ─── */
.nav {
    padding: 20px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
}

.nav-link {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--blue-400);
}

/* ─── Hero ─── */
.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 20px;
    color: var(--blue-400);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    color: var(--white);
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--blue-400), var(--cyan-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    max-width: 640px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
    color: var(--gray-400);
    line-height: 1.7;
}

/* ─── Signup Form ─── */
.signup-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.form-row input {
    flex: 1;
    min-width: 160px;
    padding: 14px 18px;
    background: var(--navy-800);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    color: var(--white);
    font-size: 0.95rem;
    font-family: var(--font);
    transition: border-color 0.2s;
}

.form-row input:focus {
    outline: none;
    border-color: var(--blue-500);
}

.form-row input::placeholder {
    color: var(--gray-500);
}

.btn-cta {
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--blue-500), #2563eb);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: transform 0.15s, box-shadow 0.2s;
    font-family: var(--font);
}

.btn-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.btn-cta:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.form-note {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.form-message {
    margin-top: 12px;
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.form-message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

/* ─── Features ─── */
.features {
    padding: 80px 0;
    border-top: 1px solid rgba(255,255,255,0.04);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 32px 24px;
    background: var(--navy-800);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-lg);
    transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* ─── Trust ─── */
.trust {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.04);
}

.trust h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 40px;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.trust-item {
    padding: 20px;
    background: var(--navy-800);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.06);
}

.trust-label {
    display: block;
    font-weight: 700;
    color: var(--blue-300);
    font-size: 1rem;
    margin-bottom: 6px;
}

.trust-detail {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ─── Footer ─── */
.footer {
    padding: 32px 0;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer p {
    color: var(--gray-500);
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--blue-400);
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
    .hero {
        padding: 60px 0 50px;
    }

    .form-row {
        flex-direction: column;
    }

    .form-row input, .btn-cta {
        width: 100%;
    }

    .nav-inner {
        flex-direction: column;
        gap: 12px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}