/* AI PrepX Modern Design System */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap');

/* CSS Variables for Modern Theme */
:root {
    /* Primary Colors - Modern Purple/Blue Gradient */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    /* Base Colors */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #7c8ef5;
    --secondary: #f093fb;
    --accent: #00f2fe;
    --success: #4facfe;
    --danger: #f5576c;
    --warning: #fa709a;
    --info: #4facfe;
    
    /* Neutral Colors */
    --dark: #1a202c;
    --dark-secondary: #2d3748;
    --gray-800: #4a5568;
    --gray-700: #718096;
    --gray-600: #a0aec0;
    --gray-500: #cbd5e0;
    --gray-400: #e2e8f0;
    --gray-300: #edf2f7;
    --gray-200: #f7fafc;
    --white: #ffffff;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--dark);
        --bg-secondary: var(--dark-secondary);
        --text-primary: var(--white);
        --text-secondary: var(--gray-400);
    }
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gray-200);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.05;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Modern Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    border: none;
    padding: 1rem 0;
    transition: var(--transition-base);
}

.navbar-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.75rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-base);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--gray-700);
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.navbar-nav .nav-link:hover {
    background: var(--gray-200);
    color: var(--primary);
}

/* Modern Cards */
.card {
    background: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition-base);
    overflow: hidden;
}

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

.card-header {
    background: var(--gray-200);
    border: none;
    padding: 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 2rem;
}

/* Gradient Cards */
.card-gradient {
    position: relative;
    color: white;
    overflow: hidden;
}

.card-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    z-index: -1;
}

.card-gradient-secondary::before {
    background: var(--secondary-gradient);
}

.card-gradient-success::before {
    background: var(--success-gradient);
}

/* Modern Buttons */
.btn {
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    padding: 0.75rem 1.5rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
}

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

.btn-secondary {
    background: var(--gray-700);
    color: white;
}

.btn-success {
    background: var(--success-gradient);
    color: white;
}

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

.btn-outline-primary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition-base);
    z-index: 1000;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
}

/* Modern Form Controls */
.form-control, .form-select {
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    font-weight: 500;
    transition: var(--transition-fast);
    background: var(--white);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

/* Input Groups with Icons */
.input-icon {
    position: relative;
}

.input-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-600);
}

.input-icon .form-control {
    padding-left: 3rem;
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--gray-300);
    overflow: visible;
}

.progress-bar {
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    position: relative;
    overflow: visible;
}

.progress-bar::after {
    content: attr(data-value);
    position: absolute;
    right: -20px;
    top: -25px;
    background: var(--dark);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Hero Section */
.hero {
    background: var(--primary-gradient);
    color: white;
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s infinite linear;
}

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

/* Feature Cards */
.feature-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-base);
    transform: rotate(45deg);
}

.feature-card:hover::before {
    opacity: 0.1;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    transition: var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

/* Dashboard Stats */
.stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 150%;
    height: 150%;
    background: var(--primary-gradient);
    opacity: 0.1;
    transform: rotate(45deg);
}

.stat-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1;
}

.stat-label {
    color: var(--gray-600);
    font-weight: 500;
}

/* Interview Type Cards */
.interview-type-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.interview-type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--primary-gradient);
}

.interview-type-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.interview-type-card .icon-wrapper {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    background: var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.interview-type-card:hover .icon-wrapper {
    background: var(--primary-gradient);
    transform: rotate(10deg);
}

.interview-type-card:hover .icon-wrapper i {
    color: white;
}

/* Badges */
.badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
}

.badge-gradient {
    background: var(--primary-gradient);
    color: white;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    font-weight: 500;
}

.alert-info {
    background: #e0f2fe;
    color: #0369a1;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
}

.alert-warning {
    background: #fed7aa;
    color: #92400e;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* Loading Spinner */
.spinner-modern {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-300);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Pulse Animation */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

/* Floating Elements */
.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Tooltips */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    white-space: nowrap;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.3s;
}

/* Page Transitions */
.page-enter {
    opacity: 0;
    transform: translateY(20px);
}

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

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .hero { padding: 4rem 0; }
    .feature-card { padding: 1.5rem; }
    .card-body { padding: 1.5rem; }
}

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

.bg-gradient {
    background: var(--primary-gradient);
}

.shadow-gradient {
    box-shadow: 0 10px 30px -10px rgba(102, 126, 234, 0.5);
}

.border-gradient {
    border: 2px solid;
    border-image: var(--primary-gradient) 1;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-200);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}