/*
Theme Name: SmartBoard Educational Platform
Description: Modern, sophisticated WordPress theme for selling SmartBoard Educational Platform access
Version: 1.0.0
Author: SmartBoard Team
*/

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --text-on-dark: #ffffff;
    --text-secondary-on-dark: #e2e8f0;
    --text-light-on-dark: #cbd5e1;
    --background-primary: #ffffff;
    --background-secondary: #f8fafc;
    --background-tertiary: #f1f5f9;
    --background-dark: #0f172a;
    --background-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: var(--background-gradient);
    color: white;
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.site-branding {
    display: flex;
    align-items: center;
}

.site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 800;
    font-size: var(--font-size-xl);
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

/* Navigation */
.main-navigation {
    display: flex;
    align-items: center;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.menu-wrapper {
    display: flex;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-normal);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Hero Section */
.hero-section {
    padding: 180px 0 var(--spacing-5xl);
    background: var(--background-gradient);
    position: relative;
    overflow: hidden;
    color: white;
    z-index: 1;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

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

.hero-logo {
    margin-bottom: var(--spacing-2xl);
    text-align: left;
    padding: var(--spacing-lg);
    background: transparent;
    display: inline-block;
}

.logo-image {
    height: 250px;
    width: auto;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.6));
    transition: all var(--transition-normal);
}

.logo-image:hover {
    transform: scale(1.1);
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.5));
}

.hero-logo:hover {
    transform: translateY(-2px);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--text-on-dark);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.gradient-text {
    color: #ffffff;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--text-secondary-on-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
    display: flex;
    justify-content: flex-start;
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light-on-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Platform Preview */
.platform-preview {
    position: relative;
}

.preview-window {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-slow);
}

.preview-window:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.window-header {
    background: var(--background-secondary);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.window-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control.red { background: #ff5f57; }
.control.yellow { background: #ffbd2e; }
.control.green { background: #28ca42; }

.window-title {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.preview-content {
    padding: var(--spacing-xl);
    min-height: 300px;
}

.canvas-demo {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.drawing-tools {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.tool {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: var(--font-size-lg);
}

.tool.active {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.canvas-area {
    height: 200px;
    background: white;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* SmartBoard Mockup Styles */
.smartboard-mockup {
    max-width: 500px;
    margin: 0 auto;
    animation: slideInUp 1s ease-out;
}

.mockup-window {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.mockup-header {
    background: var(--background-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.mockup-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.control-dot.red {
    background: #ff5f57;
}

.control-dot.yellow {
    background: #ffbd2e;
}

.control-dot.green {
    background: #28ca42;
}

.control-dot:hover {
    transform: scale(1.1);
}

.mockup-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    flex: 1;
    text-align: center;
}

.mockup-content {
    padding: var(--spacing-lg);
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--background-tertiary);
    border-radius: var(--radius-lg);
}

.tool-group {
    display: flex;
    gap: var(--spacing-sm);
}

.tool {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--text-secondary);
}

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

.tool.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.tool svg {
    width: 20px;
    height: 20px;
}

.color-palette {
    display: flex;
    gap: var(--spacing-sm);
}

.color {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.color:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.color.active {
    border-color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.canvas-area {
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

.canvas-content {
    padding: var(--spacing-lg);
    position: relative;
    height: 100%;
}

.ai-suggestion {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.suggestion-icon {
    font-size: var(--font-size-lg);
}

.handwriting-demo {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.equation {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-family: 'Inter', sans-serif;
}

.solution {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 500;
    background: var(--background-tertiary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    display: inline-block;
    border-left: 4px solid var(--primary-color);
}

.canvas-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.element {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 3s ease-in-out infinite;
}

.shape-1 {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    top: 20%;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 40px;
    height: 40px;
    background: var(--success-color);
    bottom: 30%;
    left: 15%;
    animation-delay: 1s;
}

.shape-3 {
    width: 80px;
    height: 80px;
    background: var(--warning-color);
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
}

.section-description {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features-section {
    padding: var(--spacing-4xl) 0;
    background: white;
    position: relative;
    z-index: 2;
    margin-top: 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: white;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Pricing Section */
.pricing-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.pricing-card {
    max-width: 700px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    border: 1px solid var(--border-light);
    backdrop-filter: blur(10px);
    animation: slideInUp 0.8s ease-out;
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pricing-header {
    padding: var(--spacing-3xl);
    text-align: center;
    background: var(--background-gradient);
    color: white;
    position: relative;
    overflow: hidden;
}

.pricing-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.3;
}

.pricing-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.currency {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.amount {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--text-on-dark);
    animation: pulse 2s ease-in-out infinite;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

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

.period {
    font-size: var(--font-size-lg);
    color: var(--text-light-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.price-description {
    color: var(--text-light-on-dark);
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.pricing-features {
    padding: var(--spacing-4xl) var(--spacing-3xl);
    background: #ffffff;
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.pricing-features ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.pricing-features li {
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #007AFF, #5856D6, #AF52DE, #FF2D92);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 122, 255, 0.2);
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
    filter: grayscale(0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover .feature-icon {
    filter: grayscale(0);
    transform: scale(1.1);
}

.feature-content {
    flex: 1;
    min-width: 0;
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.feature-description {
    font-size: var(--font-size-base);
    color: #86868b;
    line-height: 1.5;
    font-weight: 400;
}

.feature-item:hover .feature-title {
    color: #007AFF;
}

.feature-item:hover .feature-description {
    color: #515154;
}

@media (max-width: 768px) {
    .pricing-features ul {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-item {
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        font-size: 2rem;
    }
}

.pricing-form {
    padding: var(--spacing-3xl);
    background: white;
    border-top: 1px solid var(--border-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    background: var(--background-primary);
    box-shadow: var(--shadow-sm);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input[type="email"],
.form-group input[type="text"] {
    margin-bottom: var(--spacing-sm);
}

.form-group button {
    margin-top: var(--spacing-sm);
}

.payment-security {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.payment-security::before {
    content: '🔒';
    font-size: var(--font-size-base);
}

/* User fields styling */
.users-container {
    margin: var(--spacing-lg) 0;
}

.user-field-group {
    background: var(--background-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.user-field-group:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.user-field-group h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.user-fields-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: var(--spacing-md);
    align-items: end;
}

.user-fields-row.no-email {
    grid-template-columns: 1fr 1fr auto;
}

.no-email-btn {
    background: var(--text-muted);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.no-email-btn:hover {
    background: var(--text-secondary);
}

.no-email-btn.active {
    background: var(--error-color);
}

.user-fields-row input[type="email"]:disabled {
    background: var(--border-light);
    color: var(--text-light);
    cursor: not-allowed;
}

.user-fields-row input[type="email"]:disabled::placeholder {
    color: var(--text-light);
}

.form-group select {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    background: var(--background-primary);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Message styling */
.message {
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    animation: slideIn 0.3s ease-out;
    box-shadow: var(--shadow-md);
    border: 1px solid transparent;
    backdrop-filter: blur(10px);
}

.message.success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border-color: #10b981;
}

.message.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    border-color: #ef4444;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    padding: var(--spacing-xl);
    background: var(--background-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
}

.testimonial-content {
    margin-bottom: var(--spacing-lg);
}

.testimonial-content p {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-info h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
}

.author-info span {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--text-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.cta-content p {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xl);
    color: var(--text-secondary-on-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

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

.cta-section .btn-primary:hover {
    background: var(--background-secondary);
    transform: translateY(-2px);
}

/* Footer */
.site-footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-on-dark);
}

.footer-description {
    color: var(--text-light-on-dark);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

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

.footer-links a {
    color: var(--text-light-on-dark);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: var(--text-on-dark);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: #374151;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light-on-dark);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--text-on-dark);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-xl);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    color: var(--text-light-on-dark);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-bottom-links a {
    color: var(--text-light-on-dark);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-normal);
}

.footer-bottom-links a:hover {
    color: var(--text-on-dark);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .menu-wrapper {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid var(--border-color);
        padding: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .menu-wrapper.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .pricing-header {
        padding: var(--spacing-xl);
    }
    
    .pricing-features {
        padding: var(--spacing-xl);
    }
    
    .pricing-form {
        padding: 0 var(--spacing-xl) var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .price .amount {
        font-size: var(--font-size-4xl);
    }
    
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
}

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

.feature-card,
.testimonial-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading States */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Focus States */
.btn:focus,
input:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
}

/* Student password section styles */
.student-password-section {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.password-fields {
    margin-top: 12px;
    padding: 12px;
    background: white;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

.password-note {
    font-size: 12px;
    color: #6b7280;
    line-height: 1.4;
    margin-top: 8px;
    padding: 8px 12px;
    background: #eff6ff;
    border-radius: 4px;
    border-left: 3px solid #3b82f6;
}