/* CSS Variables & Theme */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --primary-lighter: #334155;
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --text: #0f172a;
    --text-light: #475569;
    --text-lighter: #94a3b8;
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border: #e2e8f0;
    --success: #10b981;
    --error: #ef4444;
    
    --font-family-display: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-body);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 1rem;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    transition: var(--transition);
}

.logo:hover {
    color: var(--accent);
}

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

.logo-text {
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--accent);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta:hover::after {
    display: none;
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    max-width: 600px;
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-metrics {
    display: flex;
    gap: var(--spacing-xl);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: rgba(6, 182, 212, 0.05);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* Features Section */
.features {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--bg);
}

.features h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    color: var(--primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--bg-secondary);
}

.how-it-works h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    color: var(--primary);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-lg);
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    font-weight: 800;
    font-size: 1.5rem;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.step h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.step p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

.step-connector {
    position: absolute;
    top: 25px;
    left: 50%;
    width: calc(100% - 80px);
    height: 2px;
    background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
    z-index: 0;
}

.step:last-child .step-connector {
    display: none;
}

/* Responsive: Hide connectors on mobile */
@media (max-width: 768px) {
    .steps {
        flex-direction: column;
    }

    .step-connector {
        display: none !important;
    }
}

/* Benefits Section */
.benefits {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--bg);
}

.benefits h2 {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.benefit-item {
    padding: var(--spacing-xl);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent);
}

.benefit-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.benefit-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* CTA & Form Section */
.cta-section {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: white;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.cta-section > .container > p {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    font-size: 1.05rem;
}

/* Form Styles */
.onboarding-form {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: var(--font-family-body);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
    color: var(--text);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
}

.error-message {
    display: block;
    color: var(--error);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    min-height: 1.2rem;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--error);
    background-color: rgba(239, 68, 68, 0.05);
}

.form-disclaimer {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

.form-success {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid var(--success);
    color: var(--success);
}

.success-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.form-success h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.form-success p {
    font-size: 0.95rem;
}

.form-error {
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid var(--error);
    color: var(--error);
    font-size: 0.95rem;
    margin-top: var(--spacing-md);
}

/* Footer */
.footer {
    background: var(--primary);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-cta-group {
        flex-direction: column;
    }

    .hero-metrics {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .features h2,
    .how-it-works h2,
    .benefits h2,
    .cta-section h2 {
        font-size: 1.75rem;
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .btn {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }

    .onboarding-form {
        padding: var(--spacing-lg);
    }

    .cta-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .features,
    .how-it-works,
    .benefits {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero::before {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .navbar .container {
        padding: var(--spacing-md);
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .hero-title {
        font-size: 1.875rem;
    }

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

    .logo-text {
        display: none;
    }

    .logo-icon {
        font-size: 1.75rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}