/* ===================================
   Enhanced CSS for Contract Templates Platform
   =================================== */

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

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --accent-purple: #8b5cf6;
    
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #10b981;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header
   =================================== */

.header {
    background-color: var(--surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.pro-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-purple));
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.nav a:hover {
    color: var(--primary-color);
    background-color: var(--surface-hover);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.3;
}

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

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.7;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: white;
    color: var(--primary-color);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-card i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.stat-card h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ===================================
   Templates Section
   =================================== */

.templates-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--surface);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-description {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.template-card {
    background-color: var(--background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.template-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.template-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
    font-size: 2rem;
}

.template-card h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.template-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

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

.template-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.template-features i {
    color: var(--success-color);
    font-size: 0.8rem;
}

.select-template-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.select-template-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Features Section
   =================================== */

.features {
    padding: var(--spacing-2xl) 0;
    background-color: var(--background);
}

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

.feature-card {
    background-color: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   Form Section
   =================================== */

.form-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--background);
}

.form-header {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-md);
}

.back-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: var(--surface-hover);
}

.contract-form {
    max-width: 900px;
    margin: 0 auto;
}

.form-section-card {
    background-color: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.required {
    color: var(--error-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: var(--surface);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.helper-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===================================
   Messages
   =================================== */

.message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideIn 0.3s ease;
}

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

.success-message {
    background-color: #d1fae5;
    border: 2px solid var(--success-color);
    color: #065f46;
}

.error-message {
    background-color: #fee2e2;
    border: 2px solid var(--error-color);
    color: #991b1b;
}

.message i {
    font-size: 1.5rem;
}

/* ===================================
   Buttons
   =================================== */

.form-actions {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.submit-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.submit-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

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

.disclaimer {
    font-size: 0.9rem;
    opacity: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

/* ===================================
   Loading Overlay
   =================================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 9999;
}

.loading-overlay p {
    color: white;
    font-size: 1.2rem;
    font-weight: 500;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav {
        gap: var(--spacing-sm);
    }
    
    .nav a {
        font-size: 0.9rem;
        padding: var(--spacing-xs);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .templates-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .cta-button {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
}

/* ===================================
   Smooth Scrolling
   =================================== */

html {
    scroll-behavior: smooth;
}

/* ===================================
   Selection Styling
   =================================== */

::selection {
    background-color: var(--primary-color);
    color: white;
}