/* ==========================================
   Layout Optimization CSS
   Enhanced aesthetic styling for NFC pages
   ========================================== */

:root {
    /* Enhanced Color Palette */
    --primary-gradient: linear-gradient(135deg, #FF6B81 0%, #FF8E9B 50%, #FFC0CB 100%);
    --secondary-gradient: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    --accent-gradient: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    
    /* Refined Colors */
    --primary-color: #FF6B81;
    --primary-light: #FFB6C1;
    --primary-dark: #E55A6B;
    --secondary-color: #F8F9FA;
    --accent-color: #FFD700;
    --success-color: #28A745;
    --info-color: #17A2B8;
    --warning-color: #FFC107;
    --danger-color: #DC3545;
    
    /* Text Colors */
    --text-primary: #2C3E50;
    --text-secondary: #6C757D;
    --text-light: #ADB5BD;
    --text-white: #FFFFFF;
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-light: #E9ECEF;
    --bg-dark: #343A40;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Typography */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-family-display: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ==========================================
   Global Layout Improvements
   ========================================== */

body {
    font-family: var(--font-family-primary);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 50%, #DEE2E6 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Enhanced Container Spacing */
.container {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-xl);
        padding-right: var(--space-xl);
    }
}

/* ==========================================
   Enhanced Navigation Bar
   ========================================== */

.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 107, 129, 0.1);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.navbar-brand {
    font-weight: var(--font-bold);
    color: var(--primary-color) !important;
    font-size: var(--text-lg);
    transition: all var(--transition-normal);
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--primary-dark) !important;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

/* ==========================================
   Enhanced Hero Sections
   ========================================== */

.hero-section {
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: var(--space-3xl) 0;
    position: relative;
    overflow: hidden;
}

.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="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-title {
    font-family: var(--font-family-display);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: var(--text-xl);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 1;
}

.lead {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    line-height: var(--leading-relaxed);
    position: relative;
    z-index: 1;
}

/* ==========================================
   Enhanced Logo Section
   ========================================== */

.logo-section {
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F9FA 100%);
    padding: var(--space-3xl) 0;
    position: relative;
}

.logo-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.3;
}

.main-logo {
    max-width: 180px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-slow);
    filter: drop-shadow(0 4px 8px rgba(255, 107, 129, 0.2));
}

.logo-link:hover .main-logo {
    transform: scale(1.05) rotate(2deg);
    box-shadow: var(--shadow-xl);
    filter: drop-shadow(0 8px 16px rgba(255, 107, 129, 0.3));
}

/* ==========================================
   Enhanced Card Components
   ========================================== */

.knowledge-card,
.nfc-badge-card,
.thanks-wall {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin: var(--space-xl) 0;
    border: 1px solid rgba(255, 107, 129, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.knowledge-card::before,
.nfc-badge-card::before,
.thanks-wall::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.8;
}

.knowledge-card:hover,
.nfc-badge-card:hover,
.thanks-wall:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 107, 129, 0.2);
}

/* Card Headers */
.card-header {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    border-bottom: 1px solid rgba(255, 107, 129, 0.1);
    padding: var(--space-xl);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.card-header h4 {
    margin: 0;
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card-header i {
    color: var(--primary-color);
    font-size: var(--text-lg);
}

/* Card Bodies */
.card-body {
    padding: var(--space-xl);
}

/* ==========================================
   Enhanced NFC Badge Section
   ========================================== */

.nfc-badge-section {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    padding: var(--space-3xl) 0;
    position: relative;
}

.badge-placeholder {
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    margin: var(--space-xl) 0;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.badge-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.feature-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 107, 129, 0.05);
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 107, 129, 0.1);
}

.feature-item i {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-md);
    color: var(--primary-color);
}

.feature-item h6 {
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.feature-item small {
    color: var(--text-secondary);
}

/* ==========================================
   Enhanced Knowledge Section
   ========================================== */

.knowledge-section {
    padding: var(--space-3xl) 0;
}

.knowledge-content {
    padding: var(--space-xl);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.knowledge-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F9FA 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 107, 129, 0.1);
    transition: all var(--transition-normal);
}

.knowledge-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 107, 129, 0.2);
}

.knowledge-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: var(--text-xl);
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.knowledge-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.knowledge-text {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ==========================================
   Enhanced Thanks Wall
   ========================================== */

.thanks-wall-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, #FFF0F5 0%, #FFE4E1 100%);
}

.thanks-wall {
    background: var(--bg-primary);
    border: 1px solid rgba(255, 182, 193, 0.2);
}

.wall-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.wall-header i {
    font-size: var(--text-3xl);
    color: var(--danger-color);
    margin-bottom: var(--space-lg);
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.wall-header h3 {
    font-family: var(--font-family-display);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.message-form .card {
    border: 1px solid rgba(255, 107, 129, 0.1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.message-form .card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 107, 129, 0.2);
}

.message-item {
    background: linear-gradient(135deg, #FFF8F0 0%, #FFF0F5 100%);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.message-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.message-content {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.message-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.message-author {
    font-weight: var(--font-semibold);
    color: var(--primary-color);
}

/* ==========================================
   Enhanced Button Styles
   ========================================== */

.btn {
    border-radius: var(--radius-xl);
    padding: var(--space-md) var(--space-xl);
    font-weight: var(--font-medium);
    font-size: var(--text-base);
    transition: all var(--transition-normal);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::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 var(--transition-normal);
}

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

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #E55A6B 0%, #FF7F8F 50%, #FFB6C1 100%);
}

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

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

.btn-sm {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
}

/* ==========================================
   Enhanced Form Elements
   ========================================== */

.form-control {
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 107, 129, 0.1);
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    transition: all var(--transition-normal);
    background: var(--bg-primary);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(255, 107, 129, 0.25);
    background: var(--bg-primary);
}

.form-label {
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ==========================================
   Enhanced Search and Filter Section
   ========================================== */

.search-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-xl);
    border: 1px solid rgba(255, 107, 129, 0.1);
}

.search-input {
    border: 2px solid rgba(255, 107, 129, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    transition: all var(--transition-normal);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(255, 107, 129, 0.25);
}

.filter-buttons {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

.filter-btn {
    border: 2px solid rgba(255, 107, 129, 0.2);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: all var(--transition-normal);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: var(--primary-gradient);
    border-color: var(--primary-color);
    color: var(--text-white);
    box-shadow: var(--shadow-sm);
}

/* ==========================================
   Enhanced Knowledge Cards (Knowledge Classroom)
   ========================================== */

.section-group {
    margin-bottom: var(--space-3xl);
}

.group-header {
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.group-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 4s ease-in-out infinite;
}

.group-title {
    font-family: var(--font-family-display);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
}

.group-subtitle {
    font-size: var(--text-lg);
    opacity: 0.9;
    margin: 0;
    position: relative;
    z-index: 1;
}

.knowledge-card .card-header {
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
}

.card-number {
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    font-size: var(--text-lg);
    margin-right: var(--space-lg);
}

.question {
    background: linear-gradient(135deg, #FFB6C1 0%, #FFC0CB 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.question-icon {
    color: var(--primary-color);
    font-size: var(--text-xl);
    margin-right: var(--space-sm);
}

.question-text {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin: 0;
    font-size: var(--text-lg);
}

.answer {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    border-left: 5px solid var(--success-color);
    box-shadow: var(--shadow-sm);
}

.answer-icon {
    color: var(--success-color);
    font-size: var(--text-xl);
    margin-right: var(--space-sm);
}

.answer-text {
    color: var(--text-primary);
    line-height: var(--leading-relaxed);
    margin: 0;
    font-size: var(--text-base);
}

.tips {
    background: linear-gradient(135deg, #FFF3CD 0%, #FFEAA7 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border-left: 5px solid var(--warning-color);
    box-shadow: var(--shadow-sm);
}

.tips-icon {
    color: var(--warning-color);
    font-size: var(--text-xl);
    margin-right: var(--space-sm);
}

.tips-title {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
}

.tips-list {
    margin: 0;
    padding-left: var(--space-xl);
}

.tips-list li {
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    line-height: var(--leading-relaxed);
}

.warning {
    background: linear-gradient(135deg, #F8D7DA 0%, #F5C6CB 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border-left: 5px solid var(--danger-color);
    margin-top: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.warning-icon {
    color: var(--danger-color);
    font-size: var(--text-xl);
    margin-right: var(--space-sm);
}

/* ==========================================
   Enhanced Floating Elements
   ========================================== */

.floating-action {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
}

.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    left: var(--space-xl);
    z-index: 1000;
}

.btn-floating {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    border: none;
    color: var(--text-white);
    font-size: var(--text-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-floating:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.calendar-float-btn .btn {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border: none;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.calendar-float-btn .btn:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   Enhanced Footer
   ========================================== */

.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-3xl);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.5;
}

/* ==========================================
   Enhanced Loading States
   ========================================== */

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    border-color: var(--primary-color);
    border-right-color: transparent;
}

/* ==========================================
   Enhanced Animations
   ========================================== */

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

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

.scale-in {
    animation: scaleIn 0.3s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================
   Responsive Design Enhancements
   ========================================== */

@media (max-width: 768px) {
    :root {
        --space-xs: 0.25rem;
        --space-sm: 0.5rem;
        --space-md: 0.75rem;
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-lg);
    }
    
    .main-logo {
        max-width: 120px;
    }
    
    .container {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
    
    .card-body,
    .nfc-badge-card,
    .thanks-wall {
        padding: var(--space-lg);
    }
    
    .floating-action,
    .back-to-top {
        bottom: var(--space-lg);
    }
    
    .floating-action {
        right: var(--space-lg);
    }
    
    .back-to-top {
        left: var(--space-lg);
    }
    
    .btn-floating {
        width: 56px;
        height: 56px;
        font-size: var(--text-lg);
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .day-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: var(--space-2xl) 0;
    }
    
    .logo-section {
        padding: var(--space-2xl) 0;
    }
    
    .knowledge-section,
    .thanks-wall-section {
        padding: var(--space-2xl) 0;
    }
    
    .main-logo {
        max-width: 100px;
    }
    
    .feature-item {
        padding: var(--space-lg);
    }
    
    .knowledge-item {
        flex-direction: column;
        text-align: center;
    }
    
    .knowledge-icon {
        width: 50px;
        height: 50px;
        font-size: var(--text-lg);
    }
}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
    .navbar,
    .floating-action,
    .back-to-top,
    .calendar-float-btn,
    .btn-floating {
        display: none !important;
    }
    
    .hero-section {
        background: none !important;
        color: var(--text-primary) !important;
    }
    
    .card,
    .knowledge-card,
    .nfc-badge-card,
    .thanks-wall {
        box-shadow: none !important;
        border: 1px solid var(--text-light) !important;
    }
}

/* ==========================================
   Accessibility Enhancements
   ========================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for better accessibility */
.btn:focus,
.form-control:focus,
.filter-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --text-primary: #000000;
        --text-secondary: #333333;
        --bg-primary: #FFFFFF;
        --bg-secondary: #F0F0F0;
    }
}
/*
 ==========================================
   Enhanced Component Styles
   ========================================== */

/* Logo Section Enhancements */
.logo-container {
    position: relative;
}

.feature-highlights {
    margin-top: var(--space-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 107, 129, 0.1);
    border-radius: var(--radius-xl);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.highlight-item:hover {
    background: rgba(255, 107, 129, 0.15);
    transform: translateY(-2px);
}

/* NFC Badge Section Enhancements */
.section-header {
    position: relative;
}

.badge-showcase {
    position: relative;
}

.badge-icon-container {
    position: relative;
    display: inline-block;
}

.badge-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.ring {
    position: absolute;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    animation: ripple 2s ease-out infinite;
}

.ring-1 {
    width: 120px;
    height: 120px;
    top: -60px;
    left: -60px;
}

.ring-2 {
    width: 160px;
    height: 160px;
    top: -80px;
    left: -80px;
    animation-delay: 0.5s;
}

.ring-3 {
    width: 200px;
    height: 200px;
    top: -100px;
    left: -100px;
    animation-delay: 1s;
}

@keyframes ripple {
    0% {
        opacity: 1;
        transform: scale(0.1);
    }
    50% {
        opacity: 0.5;
    }
    100% {
        opacity: 0;
        transform: scale(1);
    }
}

.feature-icon-wrapper {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    margin: 0 auto;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon-wrapper {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

/* Knowledge Section Enhancements */
.knowledge-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: var(--text-xl);
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

/* Thanks Wall Enhancements */
.heart-icon-container {
    position: relative;
    display: inline-block;
}

.heart-icon-container i {
    font-size: var(--text-3xl);
    position: relative;
    z-index: 1;
}

.heart-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 2px solid var(--danger-color);
    border-radius: var(--radius-full);
    opacity: 0;
    animation: heartPulse 2s ease-out infinite;
}

@keyframes heartPulse {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.5);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

.wall-stats {
    margin-top: var(--space-lg);
}

.stat-item {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-xl);
    font-size: var(--text-sm);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section Enhancements (Knowledge Classroom) */
.hero-content {
    position: relative;
}

.hero-icon {
    position: relative;
    display: inline-block;
}

.icon-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.decoration-ring {
    position: absolute;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    animation: decorationSpin 3s linear infinite;
}

.decoration-ring.ring-1 {
    width: 120px;
    height: 120px;
    top: -60px;
    left: -60px;
}

.decoration-ring.ring-2 {
    width: 160px;
    height: 160px;
    top: -80px;
    left: -80px;
    animation-direction: reverse;
    animation-duration: 4s;
}

@keyframes decorationSpin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.feature-badge {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-white);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-normal);
}

.feature-badge:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Search Section Enhancements */
.search-section {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
}

.search-header {
    margin-bottom: var(--space-lg);
}

.search-input-wrapper {
    position: relative;
}

.search-input-wrapper .input-group {
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.search-input-wrapper .input-group-text {
    border: none;
    background: var(--bg-primary);
}

.search-input-wrapper .search-input {
    border: none;
    background: var(--bg-primary);
}

.search-input-wrapper .btn {
    border: none;
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.search-input-wrapper .btn:hover {
    background: var(--primary-color);
    color: var(--text-white);
}

.filter-section .form-label {
    font-weight: var(--font-medium);
}

.filter-buttons {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.filter-btn {
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-sm);
    white-space: nowrap;
}

/* Enhanced Responsive Design */
@media (max-width: 768px) {
    .feature-highlights,
    .hero-features,
    .wall-stats {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm) !important;
    }
    
    .highlight-item,
    .feature-badge,
    .stat-item {
        width: 100%;
        justify-content: center;
        max-width: 280px;
    }
    
    .badge-rings .ring {
        display: none;
    }
    
    .decoration-ring {
        display: none;
    }
    
    .heart-pulse {
        display: none;
    }
    
    .feature-icon-wrapper {
        width: 60px;
        height: 60px;
    }
    
    .search-container .row {
        flex-direction: column;
    }
    
    .filter-buttons {
        justify-content: center;
        margin-top: var(--space-md);
    }
    
    .filter-btn {
        flex: 1;
        min-width: 80px;
    }
}

@media (max-width: 576px) {
    .hero-icon i {
        font-size: var(--text-3xl);
    }
    
    .heart-icon-container i {
        font-size: var(--text-2xl);
    }
    
    .feature-icon-wrapper {
        width: 50px;
        height: 50px;
    }
    
    .feature-icon-wrapper i {
        font-size: var(--text-lg);
    }
    
    .knowledge-icon {
        width: 50px;
        height: 50px;
        font-size: var(--text-lg);
    }
}

/* Enhanced Accessibility */
@media (prefers-reduced-motion: reduce) {
    .ring,
    .heart-pulse,
    .decoration-ring,
    .nfc-icon {
        animation: none !important;
    }
}

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

/* Loading State Enhancements */
.loading {
    position: relative;
}

.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 107, 129, 0.1), transparent);
    animation: loadingShimmer 2s ease-in-out infinite;
}

@keyframes loadingShimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}