/* Custom CSS for Vidyanjali Coaching Center */

:root {
    /* Material Design 3 Color System - Professional & Clean */
    --md-primary: #1976D2;           /* Professional Blue - Main brand */
    --md-primary-container: #E3F2FD; /* Light blue backgrounds */
    --md-secondary: #FF7043;          /* Warm accent - CTAs only */
    --md-secondary-container: #FFF3E0; /* Light orange backgrounds */
    
    /* Surface & Background Colors */
    --md-surface: #FAFAFA;           /* Main background */
    --md-surface-variant: #F5F5F5;   /* Card backgrounds */
    --md-outline: #E0E0E0;           /* Borders and dividers */
    
    /* Text Colors */
    --md-on-surface: #212121;        /* Primary text */
    --md-on-surface-variant: #666666; /* Secondary text */
    --md-on-primary: #FFFFFF;        /* Text on primary */
    --md-on-secondary: #FFFFFF;      /* Text on secondary */
    
    /* Semantic Colors (minimal usage) */
    --md-success: #2E7D32;           /* Success states */
    --md-warning: #F57C00;           /* Warning states */
    --md-error: #D32F2F;             /* Error states */
    
    /* Clean Gradients - Minimal Usage */
    --primary-gradient: linear-gradient(135deg, var(--md-primary) 0%, #1565C0 100%);
    --secondary-gradient: linear-gradient(135deg, var(--md-secondary) 0%, #FF5722 100%);
    --success-gradient: linear-gradient(135deg, var(--md-success) 0%, #1B5E20 100%);
    --warning-gradient: linear-gradient(135deg, var(--md-warning) 0%, #EF6C00 100%);
    --info-gradient: linear-gradient(135deg, var(--md-primary) 0%, #0277BD 100%);
    --hero-gradient: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-container) 100%);
    
    /* Design System */
    --border-radius: 8px;            /* Standard Material Design radius */
    --border-radius-sm: 4px;
    --border-radius-lg: 16px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.16);
    --shadow-soft: 0 1px 4px rgba(0, 0, 0, 0.08);
    
    /* Typography Scale */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

/* Dark mode - Material Design 3 approach */
[data-bs-theme="dark"] {
    --bs-body-bg: #121212;
    --bs-body-color: #FFFFFF;
    --bs-tertiary-bg: #1E1E1E;
    --bs-border-color: #373737;
    
    /* Dark mode color overrides */
    --md-surface: #121212;
    --md-surface-variant: #1E1E1E;
    --md-outline: #373737;
    --md-on-surface: #FFFFFF;
    --md-on-surface-variant: #CCCCCC;
    --md-primary: #42A5F5;  /* Lighter blue for dark mode */
    --hero-gradient: linear-gradient(135deg, #1E1E1E 0%, var(--md-primary) 100%);
}

/* Global Styles */
* {
    transition: all 0.3s ease;
}

body {
    font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
    line-height: 1.6;
    scroll-behavior: smooth;
    color: var(--md-on-surface);
    background: var(--md-surface);
    letter-spacing: -0.005em;
}

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

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

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

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

/* Material Design Navigation */
.navbar {
    background: var(--md-primary) !important;
    backdrop-filter: none;
    border-bottom: none;
    box-shadow: var(--shadow-soft);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

[data-bs-theme="dark"] .navbar {
    background: var(--md-primary) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: normal;
    color: var(--md-on-primary) !important;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    opacity: 0.9;
    color: var(--md-on-primary) !important;
}

.navbar-nav .nav-link {
    font-weight: var(--font-weight-medium);
    margin: 0 var(--space-sm);
    padding: var(--space-md) var(--space-lg) !important;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    color: var(--md-on-primary) !important;
    position: relative;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--border-radius);
}

.navbar-nav .nav-link:hover::before,
.navbar-nav .nav-link.active::before {
    opacity: 1;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--md-on-primary) !important;
    transform: none;
    box-shadow: none;
}

/* Clean Material Hero Section */
.hero-section {
    background: var(--hero-gradient);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50% 0 0 50%;
    pointer-events: none;
}

.hero-background {
    position: relative;
    z-index: 2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400"><defs><linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:%23F8F6F0;stop-opacity:0.4" /><stop offset="100%" style="stop-color:%23D4C5B9;stop-opacity:0.2" /></linearGradient></defs><path d="M100,50 Q200,20 300,50 Q380,120 350,200 Q300,280 200,250 Q100,220 80,150 Q90,80 100,50" fill="url(%23grad1)"/></svg>') no-repeat center;
    background-size: contain;
    opacity: 0.7;
    animation: morphBackground 15s ease-in-out infinite;
    z-index: -1;
}

@keyframes morphBackground {
    0%, 100% { transform: rotate(0deg) scale(1); }
    33% { transform: rotate(2deg) scale(1.05); }
    66% { transform: rotate(-1deg) scale(0.95); }
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.stat-item {
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    background: rgba(255, 255, 255, 0.15);
}

/* Hero Image and Floating Elements */
.hero-image {
    position: relative;
    z-index: 2;
}

.floating-elements {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    animation: float 6s ease-in-out infinite;
    transition: all 0.3s ease;
}

.floating-card:hover {
    transform: translateY(-10px) scale(1.05);
}

.floating-card:nth-child(1) {
    top: 20px;
    right: 20px;
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    top: 50%;
    left: 20px;
    animation-delay: 2s;
}

.floating-card:nth-child(3) {
    bottom: 20px;
    right: 50px;
    animation-delay: 4s;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced Hero Animations */
.hero-mobile-animation {
    display: none;
    position: absolute;
    top: 20%;
    right: 5%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: pulse-ring 4s ease-in-out infinite;
}

.hero-mobile-animation::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    animation: pulse-inner 3s ease-in-out infinite;
}

.hero-mobile-animation::after {
    content: '🎯';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    animation: rotate-icon 8s linear infinite;
}

@keyframes pulse-ring {
    0%, 100% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.9;
    }
}

@keyframes pulse-inner {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.8;
    }
}

@keyframes rotate-icon {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Floating Particles Animation */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: float-particles linear infinite;
}

.particle:nth-child(1) { left: 10%; animation-duration: 8s; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-duration: 12s; animation-delay: 2s; }
.particle:nth-child(3) { left: 30%; animation-duration: 10s; animation-delay: 4s; }
.particle:nth-child(4) { left: 40%; animation-duration: 9s; animation-delay: 1s; }
.particle:nth-child(5) { left: 50%; animation-duration: 11s; animation-delay: 3s; }
.particle:nth-child(6) { left: 60%; animation-duration: 13s; animation-delay: 5s; }
.particle:nth-child(7) { left: 70%; animation-duration: 7s; animation-delay: 1.5s; }
.particle:nth-child(8) { left: 80%; animation-duration: 14s; animation-delay: 3.5s; }
.particle:nth-child(9) { left: 90%; animation-duration: 9.5s; animation-delay: 2.5s; }

@keyframes float-particles {
    0% {
        top: 100vh;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        top: -10px;
        opacity: 0;
    }
}

/* Enhanced Desktop Floating Cards */
@media (min-width: 769px) {
    .hero-mobile-animation {
        display: none !important;
    }
    
    .floating-elements {
        display: block;
    }
    
    /* Add more sophisticated animations for desktop */
    .floating-card {
        transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        cursor: pointer;
    }
    
    .floating-card:hover {
        transform: translateY(-15px) scale(1.08) rotate(2deg);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    }
    
    .floating-card:nth-child(1) {
        animation: float-complex 8s ease-in-out infinite;
    }
    
    .floating-card:nth-child(2) {
        animation: float-complex 10s ease-in-out infinite reverse;
    }
    
    .floating-card:nth-child(3) {
        animation: float-complex 12s ease-in-out infinite;
    }
}

@keyframes float-complex {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(1deg);
    }
    50% {
        transform: translateY(-20px) rotate(0deg);
    }
    75% {
        transform: translateY(-10px) rotate(-1deg);
    }
}

/* Clean Material Feature Cards */
.feature-card {
    padding: var(--space-xl);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid var(--md-outline);
    background: var(--md-surface-variant);
    box-shadow: var(--shadow-soft);
}

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

[data-bs-theme="dark"] .feature-card {
    background: var(--md-surface-variant);
    border-color: var(--md-outline);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: var(--md-primary);
    color: var(--md-on-primary);
    font-size: 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
}

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

.feature-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon::before {
    width: 100%;
    height: 100%;
}

/* Clean Material Course Cards */
.course-card {
    transition: all 0.3s ease;
    position: relative;
    border-radius: var(--border-radius);
    background: var(--md-surface-variant);
    border: 1px solid var(--md-outline);
    box-shadow: var(--shadow-soft);
}

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

[data-bs-theme="dark"] .course-card {
    background: var(--md-surface-variant);
    border-color: var(--md-outline);
}

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

.bg-gradient-success {
    background: var(--success-gradient) !important;
}

.bg-gradient-warning {
    background: var(--warning-gradient) !important;
}

.bg-gradient-info {
    background: var(--info-gradient) !important;
}

/* Clean Material Testimonial Cards */
.testimonial-card {
    transition: all 0.3s ease;
    border: 1px solid var(--md-outline);
    border-radius: var(--border-radius);
    background: var(--md-surface-variant);
    box-shadow: var(--shadow-soft);
}

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

[data-bs-theme="dark"] .testimonial-card {
    background: var(--md-surface-variant);
    border-color: var(--md-outline);
}

.avatar {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--md-primary);
    color: var(--md-on-primary);
    font-size: 1.25rem;
    margin: 0 auto var(--space-md);
    transition: all 0.3s ease;
}

.testimonial-card:hover .avatar {
    transform: scale(1.1);
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    padding: var(--space-md) var(--space-xl);
    border: none;
    transition: all 0.3s ease;
    letter-spacing: normal;
    font-size: 0.875rem;
    text-transform: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.btn-primary:hover {
    background: #1565C0;
    color: var(--md-on-primary);
}

.btn-warning,
.btn-secondary {
    background: var(--md-secondary);
    color: var(--md-on-secondary);
}

.btn-warning:hover,
.btn-secondary:hover {
    background: #FF5722;
    color: var(--md-on-secondary);
}

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

.btn-success:hover {
    background: #1B5E20;
    color: white;
}

/* Dark Mode Toggle */
#darkModeToggle {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

[data-bs-theme="dark"] #darkModeToggle i:before {
    content: "\f583"; /* sun icon */
}

/* Utility Classes */
.rounded-4 {
    border-radius: 1.5rem !important;
}

.text-gradient {
    background: var(--text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

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

/* Enhanced Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: var(--space-xl) 0;
        min-height: 90vh;
    }
    
    .floating-elements {
        display: none;
    }
    
    /* Show mobile-friendly animated elements */
    .hero-mobile-animation {
        display: block !important;
    }
    
    .display-4, .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
        line-height: 1.2;
    }
    
    .feature-card {
        padding: var(--space-xl);
        margin-bottom: var(--space-xl);
        border-radius: var(--border-radius);
    }
    
    .stat-item {
        margin-bottom: var(--space-lg);
        padding: var(--space-lg);
    }
    
    section {
        padding: var(--space-2xl) 0;
    }
    
    .btn {
        width: 100%;
        margin-bottom: var(--space-lg);
        padding: var(--space-lg) var(--space-xl);
    }
    
    .btn:last-child {
        margin-bottom: 0;
    }
    
    .navbar {
        padding: var(--space-lg) 0;
        margin: var(--space-sm);
    }
    
    .course-card, .testimonial-card {
        margin-bottom: var(--space-xl);
    }
    
    .feature-icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.4rem;
    }
    
    .hero-content .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: 0.9rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .course-card, .testimonial-card {
        margin-bottom: var(--space-xl);
    }
    
    .stat-item {
        padding: var(--space-md);
    }
    
    .avatar {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .table th, .table td {
        padding: var(--space-md);
        font-size: 0.875rem;
    }
}

/* Loading Animation */
.loading {
    opacity: 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}

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

/* Smooth Scroll */
html {
    scroll-padding-top: 80px;
}

/* Form Styles */
.form-control {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    border: 2px solid var(--bs-border-color);
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
    transform: translateY(-2px);
}

/* Modern Table Styles */
.table {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    background: var(--warm-white);
}

.table th {
    background: var(--primary-gradient);
    color: var(--warm-white);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.01em;
    font-size: 1rem;
    padding: var(--space-lg);
    border: none;
}

.table td {
    padding: var(--space-lg);
    border-color: rgba(166, 124, 82, 0.1);
    vertical-align: middle;
}

.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background: rgba(147, 233, 190, 0.05);
    transform: scale(1.005);
}

[data-bs-theme="dark"] .table {
    background: var(--bs-tertiary-bg);
}

[data-bs-theme="dark"] .table td {
    border-color: rgba(199, 147, 131, 0.2);
}

/* Clean Material Card Effects */
.card {
    border: 1px solid var(--md-outline);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    background: var(--md-surface-variant);
}

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

[data-bs-theme="dark"] .card {
    background: var(--md-surface-variant);
    border-color: var(--md-outline);
}

/* Clean Material Badge Styles */
.badge {
    border-radius: var(--border-radius);
    padding: 0.25rem 0.75rem;
    font-weight: var(--font-weight-medium);
    font-size: 0.75rem;
    border: none;
}

.badge-success {
    background: var(--md-success);
    color: white;
}

.badge-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.badge-warning {
    background: var(--md-secondary);
    color: var(--md-on-secondary);
}

/* Clean Material Footer */
footer {
    background: var(--md-on-surface) !important;
}

footer a {
    transition: all 0.3s ease;
    color: rgba(255, 255, 255, 0.7);
}

footer a:hover {
    color: var(--md-primary) !important;
}

footer .social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

footer .social-link:hover {
    background: var(--md-primary);
    color: white !important;
    transform: translateY(-2px);
}

/* Print Styles */
@media print {
    .navbar, .btn, footer {
        display: none !important;
    }
    
    .hero-section {
        background: none !important;
        color: black !important;
        min-height: auto;
    }
    
    * {
        color: black !important;
        background: white !important;
    }
}