:root {
    /* Colors */
    --primary-bg: #080D1A;
    --secondary-bg: #101828;
    --tertiary-bg: #0B1020;
    --card-bg: #161F36;
    
    /* Accents */
    --primary-accent: #7C5CFC;
    --secondary-accent: #5EEAD4;
    --accent-blue: #38BDF8;
    --accent-red: #E53935;
    
    /* Status Colors */
    --success: #22C55E;
    --warning: #F59E0B;
    --danger: #EF4444;
    
    /* Text */
    --text-primary: #FFFFFF;
    --text-secondary: #A1A1AA;
    --text-tertiary: #71717A;
    
    /* Borders */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.12);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 48px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Dark Theme */
.dark-theme {
    background-color: var(--primary-bg);
    color: var(--text-primary);
}

/* Reset Defaults */
a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

/* Utility Classes */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 16px;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-accent) 0%, var(--accent-blue) 100%);
    color: var(--text-primary);
    border: none;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color-hover);
}

.btn-block {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-large {
    padding: 12px 24px;
    font-size: var(--font-size-lg);
}

.btn-small {
    padding: 6px 12px;
    font-size: var(--font-size-sm);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-oauth {
    gap: 8px;
    font-size: var(--font-size-sm);
}

/* Form Elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: var(--transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: var(--border-color-hover);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.1);
}

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

.form-select {
    cursor: pointer;
    appearance: none;
    padding-right: 32px;
    background-image: url('data:image/svg+xml;charset=UTF-8,%3csvg viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2"%3e%3cpolyline points="6 9 12 15 18 9"%3e%3c/polyline%3e%3c/svg%3e');
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 20px;
    padding-right: 32px;
}

/* Form Checkbox */
.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    user-select: none;
    font-size: var(--font-size-base);
}

.form-checkbox input {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--card-bg);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.form-checkbox input:hover {
    border-color: var(--border-color-hover);
}

.form-checkbox input:checked {
    background: linear-gradient(135deg, var(--primary-accent) 0%, var(--accent-blue) 100%);
    border-color: var(--primary-accent);
}

.form-checkbox input:checked::after {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

/* Links */
.form-link {
    color: var(--primary-accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.form-link:hover {
    color: var(--secondary-accent);
    text-decoration: underline;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-color-hover);
}

.card-header {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

/* Navbar */
.navbar {
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0 var(--spacing-lg);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.navbar-brand {
    flex-shrink: 0;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.logo-subtitle {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    flex: 1;
    justify-content: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-2xl);
}

.nav-link {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
}

.navbar-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    width: 24px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.hero-title {
    font-size: 48px;
    line-height: 1.1;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-illustration {
    position: relative;
    height: 500px;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(124, 92, 252, 0.1) 0%, rgba(94, 234, 212, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.placeholder-image svg {
    width: 100%;
    height: 100%;
}

.hero-bg-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.bg-element {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.05;
    animation: float 8s ease-in-out infinite;
}

.bg-element-1 {
    width: 400px;
    height: 400px;
    top: -10%;
    right: -10%;
    background: var(--primary-accent);
}

.bg-element-2 {
    width: 300px;
    height: 300px;
    bottom: -5%;
    left: 10%;
    background: var(--accent-blue);
}

.bg-element-3 {
    width: 300px;
    height: 300px;
    top: 30%;
    left: -5%;
    background: var(--secondary-accent);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-30px); }
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--tertiary-bg);
}

.features-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

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

.feature-card:hover {
    border-color: var(--primary-accent);
    transform: translateY(-2px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-accent) 0%, var(--accent-blue) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: white;
    flex-shrink: 0;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works */
.how-it-works {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.how-it-works-container {
    max-width: 1400px;
    margin: 0 auto;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
    align-items: stretch;
}

.step {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-accent) 0%, var(--accent-blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin: 0 auto var(--spacing-lg);
}

.step-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.step-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.step-divider {
    display: none;
}

.workflow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.workflow-box {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    min-width: 120px;
    font-size: var(--font-size-sm);
}

.workflow-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.workflow-arrow {
    color: var(--text-secondary);
    font-size: 24px;
}

/* Pricing Preview */
.pricing-preview {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--tertiary-bg);
}

.pricing-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.pricing-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    transition: var(--transition);
}

.pricing-card.featured {
    border-color: var(--primary-accent);
    transform: scale(1.05);
}

.pricing-card:hover {
    border-color: var(--primary-accent);
}

.pricing-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.price span {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    padding: var(--spacing-md) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-accent) 0%, var(--accent-blue) 100%);
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(124, 92, 252, 0.1) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

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

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

.footer-section a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--card-bg);
    border-color: var(--primary-accent);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--card-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color-hover);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.3s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

/* Loading Skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--card-bg) 25%, var(--secondary-bg) 50%, var(--card-bg) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}