/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #1e293b;
    line-height: 1.6;
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: #3b82f6;
    color: #ffffff;
    border-color: #3b82f6;
}

.btn-primary:hover {
    background: #2563eb;
    border-color: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #ffffff;
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.125rem;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    background: #0f172a;
    color: #ffffff;
    padding: 160px 0 120px;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    opacity: 0.95;
}

.hero-overlay::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-overlay::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: #93c5fd;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.125rem;
    color: #94a3b8;
    max-width: 600px;
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Sections ===== */
.section {
    padding: 100px 0;
}

.section-white {
    background: #ffffff;
}

.section-gray {
    background: #f8fafc;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.01em;
    color: #0f172a;
}

/* ===== Cards ===== */
.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.card {
    background: #ffffff;
    border-radius: 12px;
    padding: 40px 32px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid #e2e8f0;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.section-gray .card {
    background: #ffffff;
}

.card-icon {
    margin-bottom: 20px;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eff6ff;
    border-radius: 12px;
}

.card-bank {
    font-size: 0.875rem;
    font-weight: 600;
    color: #3b82f6;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0f172a;
}

.card-text {
    font-size: 1rem;
    color: #475569;
    line-height: 1.7;
}

/* ===== Steps ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #3b82f6;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: #0f172a;
}

.step-text {
    font-size: 0.9375rem;
    color: #64748b;
    line-height: 1.7;
}

/* ===== Architecture ===== */
.architecture {
    text-align: center;
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
    padding: 40px 24px;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
}

.arch-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
}

.arch-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border-radius: 12px;
    color: #3b82f6;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.arch-item span {
    font-size: 0.875rem;
    font-weight: 600;
    color: #334155;
}

.arch-arrow {
    font-size: 1.5rem;
    color: #94a3b8;
    font-weight: 300;
}

.arch-tech {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tech-badge {
    display: inline-block;
    padding: 8px 20px;
    background: #eff6ff;
    color: #3b82f6;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid #dbeafe;
}

/* ===== CTA Section ===== */
.section-cta {
    background: #0f172a;
    color: #ffffff;
    padding: 100px 0;
    text-align: center;
}

.section-cta .section-title {
    color: #ffffff;
}

.cta-text {
    font-size: 1.25rem;
    color: #94a3b8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    margin-bottom: 24px;
}

.cta-email {
    font-size: 0.9375rem;
    color: #64748b;
}

.cta-email a {
    color: #93c5fd;
    text-decoration: underline;
    text-decoration-color: rgba(147, 197, 253, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color 0.2s;
}

.cta-email a:hover {
    text-decoration-color: #93c5fd;
}

/* ===== Footer ===== */
.footer {
    background: #0f172a;
    border-top: 1px solid #1e293b;
    color: #64748b;
    padding: 24px 0;
    text-align: center;
    font-size: 0.875rem;
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 80px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

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

    .section {
        padding: 72px 0;
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: 40px;
    }

    .cards {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .steps {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .arch-flow {
        flex-direction: column;
        gap: 8px;
        padding: 24px 16px;
    }

    .arch-arrow {
        transform: rotate(90deg);
    }

    .card {
        padding: 32px 24px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 16px;
    }

    .btn-lg {
        padding: 16px 32px;
        font-size: 1rem;
    }
}