/* LEARN K12 v2 - Next Generation Interactive Styles */

/* Enhanced Brand Colors & Variables */
:root {
    /* Core Brand Colors - Refined Orange Palette */
    --primary-color: #E67E22;          /* Refined Orange - Primary CTA */
    --primary-light: #F39C12;          /* Bright orange for highlights */
    --primary-dark: #D35400;           /* Deep orange for hover states */
    --primary-soft: #FAD5A5;           /* Very light orange for backgrounds */
    --primary-ultra-light: #FEF4E7;    /* Ultra light orange for subtle sections */
    
    /* Secondary Colors - Professional Blues & Grays */
    --secondary-color: #2C3E50;        /* Deep Blue-Gray - Primary text */
    --secondary-light: #34495E;        /* Medium Blue-Gray - Secondary text */
    --secondary-lighter: #5D6D7E;      /* Light Blue-Gray - Tertiary text */
    --secondary-soft: #ECF0F1;         /* Very light gray for backgrounds */
    
    /* Tertiary Colors - Warm Neutrals */
    --tertiary-color: #8E44AD;         /* Purple - Accent color */
    --tertiary-light: #A569BD;         /* Light purple */
    --tertiary-dark: #7D3C98;          /* Dark purple */
    
    /* Educational Theme Colors */
    --education-blue: #3498DB;         /* Professional blue for international schools */
    --education-green: #27AE60;        /* Fresh green for bilingual schools */
    --education-purple: #9B59B6;       /* Creative purple for private schools */
    --education-teal: #16A085;         /* Trustworthy teal for public schools */
    
    /* System Colors - Refined */
    --success-color: #27AE60;          /* Green - success states */
    --info-color: #3498DB;             /* Blue - information */
    --warning-color: #F39C12;          /* Orange - warnings */
    --danger-color: #E74C3C;           /* Red - errors */
    
    --white: #ffffff;
    --black: #000000;
    --dark: #2c2c2c;
    --light: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Interactive Elements */
    --hover-transform: translateY(-4px);
    --active-transform: translateY(0px) scale(0.98);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Enhanced Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-display: 'Inter', sans-serif;
    
    /* Responsive Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Advanced Spacing System */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Enhanced Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-base: 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Interactive Shadows */
    --shadow-interactive: 0 4px 20px rgba(217, 131, 36, 0.15);
    --shadow-interactive-hover: 0 8px 30px rgba(217, 131, 36, 0.25);
    
    /* Border Radius System */
    --radius-sm: 0.375rem;
    --radius-base: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    
    /* Z-Index Scale */
    --z-behind: -1;
    --z-base: 0;
    --z-elevated: 10;
    --z-sticky: 100;
    --z-fixed: 1000;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* Enhanced Component Styles */

/* Improved Button Styles */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
    border: none !important;
    color: var(--white) !important;
    font-weight: 600 !important;
    padding: 0.75rem 2rem !important;
    border-radius: var(--radius-lg) !important;
    transition: all var(--transition-normal) !important;
    box-shadow: var(--shadow-interactive) !important;
    position: relative !important;
    overflow: hidden !important;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%) !important;
    transform: var(--hover-transform) !important;
    box-shadow: var(--shadow-interactive-hover) !important;
}

.btn-primary:active {
    transform: var(--active-transform) !important;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--primary-color) 100%) !important;
    border: none !important;
    color: var(--white) !important;
    font-weight: 600 !important;
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.3) !important;
    color: rgba(255, 255, 255, 0.9) !important;
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(10px) !important;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(255, 255, 255, 0.5) !important;
    color: var(--white) !important;
}

/* Enhanced Card Styles */
.card {
    background: var(--white) !important;
    border: 1px solid var(--secondary-soft) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: all var(--transition-normal) !important;
}

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

/* Alert Component Improvements */
.alert-light {
    background: var(--primary-ultra-light) !important;
    border-color: var(--primary-soft) !important;
    color: var(--secondary-color) !important;
}

.alert-info {
    background: rgba(52, 152, 219, 0.1) !important;
    border-color: var(--education-blue) !important;
    color: var(--secondary-color) !important;
}

/* Text Color Improvements */
.text-muted {
    color: var(--secondary-lighter) !important;
}

.text-dark {
    color: var(--secondary-color) !important;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.7) !important;
}

/* Educational Theme Utility Classes */
.bg-education-blue {
    background: var(--education-blue) !important;
}

.bg-education-green {
    background: var(--education-green) !important;
}

.bg-education-purple {
    background: var(--education-purple) !important;
}

.bg-education-teal {
    background: var(--education-teal) !important;
}

.text-education-blue {
    color: var(--education-blue) !important;
}

.text-education-green {
    color: var(--education-green) !important;
}

.text-education-purple {
    color: var(--education-purple) !important;
}

.text-education-teal {
    color: var(--education-teal) !important;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--secondary-color);
    background: linear-gradient(180deg, var(--primary-ultra-light) 0%, var(--white) 15%, var(--white) 85%, var(--secondary-soft) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-ultra-light) 0%, var(--primary-soft) 50%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    animation: loadingPulse 2s ease-in-out infinite;
}

.loading-logo img {
    margin-bottom: var(--space-6);
    filter: drop-shadow(var(--shadow-md));
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(230, 126, 34, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: var(--radius-full);
    margin: var(--space-4) auto;
    animation: spin 1s linear infinite;
}

.loading-text {
    color: var(--secondary-color);
    font-weight: 500;
    margin: 0;
    opacity: 0.8;
}

@keyframes loadingPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Navigation v2 */
.navbar {
    background: rgba(44, 62, 80, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    padding: var(--space-3) 0;
}

.navbar.scrolled {
    background: rgba(44, 62, 80, 0.98) !important;
    box-shadow: var(--shadow-lg);
    padding: var(--space-2) 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--white) !important;
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.brand-text {
    background: linear-gradient(135deg, var(--white), var(--light-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: var(--space-2);
}

.version-badge {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(217, 131, 36, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(217, 131, 36, 0); }
}

/* Journey Progress Indicator */
.journey-progress {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-2) var(--space-6);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
}

.progress-step {
    position: relative;
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.progress-step.active {
    color: var(--white);
    background: rgba(217, 131, 36, 0.3);
    box-shadow: var(--shadow-interactive);
}

.progress-step::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
}

.progress-step:last-child::after {
    display: none;
}

/* Language Toggle Enhanced */
.language-toggle .btn {
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    font-weight: 600;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.language-toggle .btn:hover {
    border-color: var(--primary-color);
    background: rgba(217, 131, 36, 0.2);
    transform: var(--hover-transform);
    color: var(--white);
}

/* Navigation Links Enhanced */
.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    padding: var(--space-2) var(--space-4) !important;
    border-radius: var(--radius-base);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-normal);
}

.nav-link:hover {
    color: var(--white) !important;
    background: rgba(255, 255, 255, 0.1);
    transform: var(--hover-transform);
}

.nav-link:hover::before {
    left: 100%;
}

/* Enhanced Buttons */
.btn {
    font-weight: 600;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-base);
    text-transform: none;
    font-size: var(--font-size-base);
    line-height: 1.5;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    z-index: 0;
}

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

.btn > * {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    box-shadow: var(--shadow-interactive);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: var(--hover-transform);
    box-shadow: var(--shadow-interactive-hover);
    color: var(--white);
}

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

/* Interactive Elements Base Classes */
.interactive-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-base);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.interactive-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.interactive-card:hover {
    transform: var(--hover-transform);
    box-shadow: var(--shadow-lg);
}

.interactive-card:hover::before {
    transform: scaleX(1);
}

.interactive-card:active {
    transform: var(--active-transform);
}

/* Utility Classes */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.text-gradient {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hover-lift:hover {
    transform: var(--hover-transform);
}

/* Background Canvas for Animations */
#background-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: var(--z-behind);
    pointer-events: none;
    opacity: 0.3;
}

/* Responsive Design */
@media (max-width: 1200px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
    }
}

@media (max-width: 992px) {
    .journey-progress {
        display: none !important;
    }
    
    .navbar-controls {
        display: flex;
        align-items: center;
    }
    
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --space-20: 3rem;
        --space-24: 4rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2rem;
        --font-size-5xl: 1.75rem;
        --font-size-4xl: 1.5rem;
        --space-16: 2rem;
        --space-20: 2.5rem;
        --space-24: 3rem;
    }
    
    .interactive-card {
        padding: var(--space-4);
    }
}

@media (max-width: 576px) {
    :root {
        --font-size-6xl: 1.75rem;
        --font-size-5xl: 1.5rem;
        --font-size-4xl: 1.25rem;
    }
    
    .btn {
        padding: var(--space-2) var(--space-4);
        font-size: var(--font-size-sm);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #1a1a1a;
        --light: #2d2d2d;
        --gray-100: #2d2d2d;
        --gray-200: #3d3d3d;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .loading-content {
        animation: none;
    }
    
    .loading-spinner {
        animation: none;
        border: 3px solid var(--primary-color);
    }
    
    .version-badge {
        animation: none;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #CC6600;
        --secondary-color: #000000;
        --gray-600: #333333;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .loading-screen,
    #floating-elements,
    #modals-container {
        display: none !important;
    }
    
    body {
        color: #000 !important;
        background: #fff !important;
    }
}