:root {
    --blue-0: #e7f5ff;
    --blue-1: #d0ebff;
    --blue-2: #a5d8ff;
    --blue-3: #74c0fc;
    --blue-4: #4dabf7;
    --blue-5: #339af0;
    --blue-6: #228be6;
    --blue-7: #1c7ed6;
    --blue-8: #1971c2;
    --blue-9: #1864ab;

    --cyan-0: #e3fafc;
    --cyan-1: #c5f6fa;
    --cyan-2: #99e9f2;
    --cyan-3: #66d9e8;
    --cyan-4: #3bc9db;
    --cyan-5: #22b8cf;
    --cyan-6: #15aabf;
    --cyan-7: #1098ad;
    --cyan-8: #0c8599;
    --cyan-9: #0b7285;

    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    background: var(--white);
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 100;
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--gray-900);
}

.nav-cta {
    padding: 8px 20px;
    background: var(--blue-6);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--blue-7);
}

/* Hero */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--blue-0) 0%, var(--white) 100%);
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--cyan-0);
    color: var(--cyan-8);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid var(--cyan-2);
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 20px;
    font-weight: 800;
}

.gradient-text {
    background: linear-gradient(135deg, var(--blue-6), var(--cyan-6));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--gray-700);
    max-width: 680px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--blue-6);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--blue-7);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 139, 230, 0.3);
}

.btn-secondary {
    background: var(--white);
    color: var(--blue-7);
    border: 1.5px solid var(--blue-2);
}

.btn-secondary:hover {
    background: var(--blue-0);
    border-color: var(--blue-4);
}

.btn-full {
    width: 100%;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid var(--gray-200);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blue-7);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* Problem Section */
.problem {
    padding: 100px 0;
}

.problem h2,
.modules h2,
.how-it-works h2,
.features h2 {
    text-align: center;
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    color: var(--gray-900);
    margin-bottom: 48px;
    font-weight: 700;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.problem-card {
    padding: 32px;
    border-radius: 12px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
}

.problem-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.problem-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--gray-900);
}

.problem-card p {
    color: var(--gray-700);
    font-size: 0.95rem;
}

/* Modules Section */
.modules {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--blue-0) 50%, var(--white) 100%);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-700);
    max-width: 600px;
    margin: -24px auto 48px;
    font-size: 1.05rem;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.module-card {
    padding: 32px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--blue-1);
    transition: all 0.2s;
}

.module-card:hover {
    border-color: var(--blue-4);
    box-shadow: 0 8px 24px rgba(34, 139, 230, 0.1);
    transform: translateY(-2px);
}

.module-number {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--cyan-6);
    margin-bottom: 12px;
}

.module-card h3 {
    font-size: 1.15rem;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.module-card p {
    color: var(--gray-700);
    font-size: 0.93rem;
    line-height: 1.6;
}

/* How it works */
.how-it-works {
    padding: 100px 0;
}

.steps {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue-5), var(--cyan-5));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-content h3 {
    font-size: 1.1rem;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.step-content p {
    color: var(--gray-700);
    font-size: 0.95rem;
}

/* Features */
.features {
    padding: 100px 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature {
    padding: 28px;
    border-radius: 10px;
    background: var(--white);
    border: 1px solid var(--gray-200);
}

.feature h3 {
    font-size: 1rem;
    color: var(--blue-7);
    margin-bottom: 8px;
}

.feature p {
    color: var(--gray-700);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Waitlist */
.waitlist {
    padding: 100px 0;
}

.waitlist-card {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    padding: 56px 40px;
    background: linear-gradient(135deg, var(--blue-0), var(--cyan-0));
    border-radius: 16px;
    border: 1px solid var(--blue-2);
}

.waitlist-card h2 {
    font-size: 1.8rem;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.waitlist-card > p {
    color: var(--gray-700);
    margin-bottom: 32px;
    font-size: 1.02rem;
}


/* Countdown */
.countdown {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-value {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--blue-7);
    background: var(--white);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 2px solid var(--blue-2);
    box-shadow: 0 4px 12px rgba(34, 139, 230, 0.1);
}

.countdown-label {
    margin-top: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-600);
}

/* Footer */
footer {
    padding: 32px 0;
    border-top: 1px solid var(--gray-200);
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--gray-800);
}

.footer-text {
    color: var(--gray-600);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

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

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

    .waitlist-card {
        padding: 40px 24px;
    }

    .countdown {
        gap: 12px;
    }

    .countdown-value {
        width: 64px;
        height: 64px;
        font-size: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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