/* Modern Design System - Matching App UI */
:root {
    /* Color Variables - Matching app design */
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --primary-light: #e3f2fd;
    --secondary-color: #495057;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --dark-color: #212529;
    
    /* Neutral Colors */
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Border and Shadow */
    --border-color: #e0e0e0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.18);
    
    /* Typography */
    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "Monaco", "Menlo", "Ubuntu Mono", monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Transitions */
    --transition-base: all 0.2s ease;
    --transition-slow: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #58a6ff;
    --primary-hover: #79c0ff;
    --primary-light: #1f2937;
    --success-color: #56d364;
    --danger-color: #f85149;
    --warning-color: #ffc107;
    --info-color: #79c0ff;
    
    --gray-50: #161b22;
    --gray-100: #21262d;
    --gray-200: #30363d;
    --gray-300: #484f58;
    --gray-400: #6e7681;
    --gray-500: #8b949e;
    --gray-600: #c9d1d9;
    --gray-700: #e6edf3;
    --gray-800: #f0f6fc;
    --gray-900: #ffffff;
    
    --border-color: #30363d;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

/* Base Styles */
body {
    font-family: var(--font-sans);
    color: var(--gray-900);
    background-color: var(--gray-50);
    line-height: 1.6;
    transition: var(--transition-slow);
}

[data-theme="dark"] body {
    background-color: #0d1117;
    color: var(--gray-700);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: var(--gray-700);
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* Navigation - Modern Style */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    padding: 1rem 0;
    transition: var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(22, 27, 34, 0.95);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.nav-link:hover {
    background-color: var(--gray-100);
    color: var(--primary-color) !important;
}

[data-theme="dark"] .nav-link:hover {
    background-color: var(--gray-100);
}

/* Hero Section - Modern Gradient */
.hero {
    background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 50%, #0a58ca 100%);
    position: relative;
    overflow: hidden;
    padding: 8rem 0 6rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .text-white {
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

/* Cards - Modern Style */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    overflow: hidden;
}

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

[data-theme="dark"] .card {
    background-color: var(--gray-100);
    border-color: var(--gray-200);
}

/* Buttons - Modern Style */
.btn {
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(13, 110, 253, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(13, 110, 253, 0.3);
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 8px rgba(13, 110, 253, 0.3);
}

/* Feature Cards */
.feature-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    height: 100%;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

[data-theme="dark"] .feature-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

[data-theme="dark"] .feature-icon {
    background: var(--gray-200);
}

/* Pricing Cards - Modern Style */
.pricing-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    border: 2px solid var(--border-color);
    position: relative;
    transition: var(--transition-base);
}

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

.pricing-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

[data-theme="dark"] .pricing-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.price-tag {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

/* Footer - Modern Style */
.footer {
    background: var(--gray-100);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

[data-theme="dark"] .footer {
    background: #0d1117;
    border-top-color: var(--gray-200);
}

/* Form Controls - Modern Style */
.form-control,
.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    font-weight: 500;
    transition: var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-700);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--gray-100);
    border-color: var(--primary-color);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@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);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.4s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.4s ease-out;
}

/* Staggered animations for lists */
.stagger-animation > * {
    opacity: 0;
    animation: fadeInUp 0.5s ease-out forwards;
}

.stagger-animation > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-animation > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-animation > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-animation > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-animation > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-animation > *:nth-child(6) { animation-delay: 0.6s; }

/* Badges - Modern Style */
.badge {
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Section Spacing */
.section-padding {
    padding: 5rem 0;
}

/* Background Patterns */
.bg-pattern {
    position: relative;
}

.bg-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 80%, var(--primary-light) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, var(--primary-light) 0%, transparent 50%);
    opacity: 0.3;
    pointer-events: none;
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-primary {
    transition: var(--transition-base);
}

.hover-primary:hover {
    color: var(--primary-color) !important;
}

/* Min height utilities */
.min-vh-75 {
    min-height: 75vh;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Page Transitions */
.page-transition {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.page-transition.active {
    opacity: 1;
    transform: translateY(0);
}

/* Interactive Elements */
.interactive-hover {
    position: relative;
    overflow: hidden;
}

.interactive-hover::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.interactive-hover:hover::before {
    width: 300px;
    height: 300px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero {
        padding: 6rem 0 4rem;
    }
    
    .display-1 {
        font-size: 2.5rem;
    }
    
    .display-3 {
        font-size: 2.25rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .display-5 {
        font-size: 1.75rem;
    }
    
    .display-6 {
        font-size: 1.5rem;
    }
    
    .section-padding {
        padding: 3rem 0;
    }
    
    /* Mobile Navigation Improvements */
    .navbar-collapse {
        background: rgba(255, 255, 255, 0.98);
        padding: 1rem;
        margin-top: 1rem;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-lg);
    }
    
    [data-theme="dark"] .navbar-collapse {
        background: rgba(22, 27, 34, 0.98);
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem !important;
        border-bottom: 1px solid var(--gray-200);
    }
    
    .navbar-nav .nav-link:last-child {
        border-bottom: none;
    }
    
    /* Mobile Card Adjustments */
    .pricing-card.featured {
        transform: none;
    }
    
    .feature-card {
        margin-bottom: 1.5rem;
    }
    
    /* Mobile Button Stack */
    .btn-group-vertical-mobile {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .btn-group-vertical-mobile .btn {
        width: 100%;
    }
    
    /* Mobile Text Sizing */
    .lead {
        font-size: 1.125rem;
    }
    
    /* Footer Mobile Layout */
    .footer .row > div {
        margin-bottom: 2rem;
    }
}

/* Small Mobile Adjustments */
@media (max-width: 576px) {
    .display-3 {
        font-size: 2rem;
    }
    
    .display-4 {
        font-size: 1.75rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .pricing-card {
        padding: 2rem 1.5rem;
    }
}