:root {
    --primary-purple: #6366F1;
    --dark-navy: #1e293b;
    --dark-gray: #222323;
    --light-gray: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    color: var(--dark-navy);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    padding: 40px 0 80px;
    text-align: center;
}

.logo img {
    height: 50px;
    width: auto;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 0 120px;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--dark-navy);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--light-gray);
    margin-bottom: 48px;
    font-weight: 400;
    line-height: 1.6;
}

/* Signup Form */
.signup-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.email-input {
    flex: 1;
    min-width: 280px;
    padding: 16px 20px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-white);
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

.email-input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.email-input::placeholder {
    color: #94a3b8;
}

.cta-button {
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    background: var(--primary-purple);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.cta-button:hover {
    background: #5558e3;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.cta-button:active {
    transform: translateY(0);
}

.privacy-note {
    font-size: 14px;
    color: var(--light-gray);
    margin-top: 12px;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    padding: 80px 0;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-purple);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #6366F1 0%, #8b5cf6 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--dark-navy);
}

.feature-card p {
    font-size: 16px;
    color: var(--light-gray);
    line-height: 1.6;
}

/* Footer */
footer {
    text-align: center;
    padding: 60px 0 40px;
    color: var(--light-gray);
    font-size: 14px;
}

/* Success Message */
.success-message {
    background: #10b981;
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    margin-top: 16px;
    display: none;
    font-weight: 500;
}

.success-message.show {
    display: block;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

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

    .email-input,
    .cta-button {
        width: 100%;
        min-width: auto;
    }

    .features {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 60px 0;
    }

    header {
        padding: 24px 0 40px;
    }

    .logo img {
        height: 40px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .hero {
        padding: 40px 0 80px;
    }
}