@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --primary-color: #1de9fa;
    --secondary-color: #2979ff;
    --accent-color: #00e676;
    --warning-color: #ff9800;
    --error-color: #ff4b7d;
    --success-color: #00e676;
    
    --bg-primary: #0a0d13;
    --bg-secondary: #181c23;
    --bg-tertiary: #10131a;
    --bg-card: #181c23;
    
    --text-primary: #f5f6fa;
    --text-secondary: #b0b8c9;
    --text-muted: #6c7293;
    
    --border-color: #2a2f3a;
    --border-radius: 12px;
    --border-radius-small: 8px;
    
    --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);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--secondary-color);
}

/* Header & Navigation */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(24, 28, 35, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo a {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--bg-primary);
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition);
}

.nav-logo a:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background: rgba(29, 233, 250, 0.1);
}

.register-btn {
    background: var(--primary-color);
    color: var(--bg-primary) !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem !important;
}

.register-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-email {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.logout-btn {
    background: var(--error-color);
    color: white !important;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius-small);
    font-size: 0.9rem;
}

.logout-btn:hover {
    background: #d32f2f;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    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 width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.02"><circle cx="30" cy="30" r="1"/></g></svg>');
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-animation {
    width: 300px;
    height: 300px;
    position: relative;
}

.circuit-board {
    width: 100%;
    height: 100%;
    position: relative;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.circuit-line {
    position: absolute;
    background: var(--primary-color);
    opacity: 0.6;
}

.circuit-line:nth-child(1) {
    width: 2px;
    height: 50%;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    animation: pulse 2s ease-in-out infinite;
}

.circuit-line:nth-child(2) {
    width: 50%;
    height: 2px;
    top: 50%;
    left: 25%;
    transform: translateY(-50%);
    animation: pulse 2s ease-in-out infinite 0.5s;
}

.circuit-line:nth-child(3) {
    width: 2px;
    height: 30%;
    top: 35%;
    right: 20%;
    animation: pulse 2s ease-in-out infinite 1s;
}

.circuit-node {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: glow 3s ease-in-out infinite;
}

.circuit-node:nth-child(4) {
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
}

.circuit-node:nth-child(5) {
    top: 50%;
    left: 20%;
    transform: translateY(-50%);
}

.circuit-node:nth-child(6) {
    bottom: 20%;
    right: 30%;
}

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

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes glow {
    0%, 100% { 
        box-shadow: 0 0 5px var(--accent-color);
        transform: scale(1);
    }
    50% { 
        box-shadow: 0 0 20px var(--accent-color);
        transform: scale(1.2);
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Stats Section */
.stats-section {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

/* Page Header */
.page-header {
    padding: 4rem 0 2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Announcements */
.announcements-preview {
    padding: 6rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin: 0;
}

.view-all-btn {
    color: var(--primary-color);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-small);
    transition: var(--transition);
}

.view-all-btn:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
}

.announcements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.announcement-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.announcement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.announcement-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.announcement-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.announcement-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin: 0;
    flex: 1;
}

.announcement-header time {
    color: var(--text-muted);
    font-size: 0.9rem;
    white-space: nowrap;
    margin-left: 1rem;
}

.announcement-content {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.announcement-author {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

/* Announcements List Page */
.announcements-section {
    padding: 4rem 0;
}

.announcements-list {
    max-width: 800px;
    margin: 0 auto;
}

.announcement-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
    position: relative;
}

.announcement-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.announcement-item h2 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.announcement-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.announcement-content {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
}

.updated-notice {
    margin-top: 2rem;
    padding: 1rem;
    background: rgba(29, 233, 250, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius-small);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 4rem;
}

.pagination-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    transition: var(--transition);
}

.pagination-btn:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    border-color: var(--primary-color);
}

.pagination-numbers {
    display: flex;
    gap: 0.5rem;
}

.pagination-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    transition: var(--transition);
}

.pagination-number:hover,
.pagination-number.active {
    background: var(--primary-color);
    color: var(--bg-primary);
    border-color: var(--primary-color);
}

/* Projects */
.projects-section {
    padding: 4rem 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.project-card.featured {
    border-color: var(--accent-color);
}

.project-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    z-index: 1;
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.project-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-color);
    color: var(--bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.project-status {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.project-status.active {
    background: rgba(0, 230, 118, 0.2);
    color: var(--accent-color);
}

.project-status.development {
    background: rgba(29, 233, 250, 0.2);
    color: var(--primary-color);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: rgba(29, 233, 250, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

/* Features Section */
.features-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature-card h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

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

/* Forms */
.form-section {
    padding: 4rem 0;
}

.form-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 3rem;
    border: 1px solid var(--border-color);
    max-width: 500px;
    margin: 0 auto;
}

.form-card h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(29, 233, 250, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.errors {
    background: rgba(255, 75, 125, 0.1);
    border: 1px solid var(--error-color);
    border-radius: var(--border-radius-small);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.errors ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.errors li {
    color: var(--error-color);
    margin-bottom: 0.5rem;
}

.errors li:last-child {
    margin-bottom: 0;
}

.success-message {
    background: rgba(0, 230, 118, 0.1);
    border: 1px solid var(--success-color);
    border-radius: var(--border-radius-small);
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: var(--success-color);
    text-align: center;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.empty-state p {
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-copy {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

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

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.slide-up {
    animation: slideUp 0.6s ease-out forwards;
}

.slide-in {
    animation: slideIn 0.6s ease-out forwards;
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

/* Tooltips */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    z-index: 1000;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--bg-primary);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.tooltip:hover::before,
.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.modal-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Dropdowns */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.dropdown-toggle:hover {
    border-color: var(--primary-color);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    z-index: 1000;
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--bg-primary);
    color: var(--primary-color);
}

/* Tabs */
.tabs {
    margin-bottom: 2rem;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-button {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border-bottom: 2px solid transparent;
}

.tab-button:hover {
    color: var(--text-secondary);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* Progress Bars */
.progress-container {
    background: var(--bg-primary);
    border-radius: 10px;
    overflow: hidden;
    height: 8px;
    margin: 1rem 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    transition: width 1s ease-out;
    width: 0%;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 3rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    
    .nav-links {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        border-top: 1px solid var(--border-color);
        transform: translateY(-100%);
        transition: var(--transition);
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .announcements-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .pagination-numbers {
        order: -1;
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .announcement-card,
    .project-card,
    .feature-card {
        padding: 1.5rem;
    }
    
    .form-card {
        padding: 2rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Print Styles */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    .navbar,
    .mobile-menu-toggle,
    .btn,
    footer {
        display: none !important;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .page-header {
        padding: 1rem 0;
    }
    
    .announcement-card,
    .project-card {
        border: 1px solid #ccc;
        break-inside: avoid;
        margin-bottom: 1rem;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --border-color: #666666;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .circuit-board {
        animation: none;
    }
    
    .circuit-line,
    .circuit-node {
        animation: none;
    }
}

/* Dark/Light Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-card);
    color: var(--primary-color);
}

/* Light Theme */
body.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-card: #ffffff;
    
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    
    --border-color: #dee2e6;
}

body.light-theme .circuit-board {
    border-color: var(--primary-color);
}

body.light-theme .circuit-line {
    background: var(--primary-color);
}

/* Scroll to Top Button */
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.scroll-top-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

/* Notification System */
#notification-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 400px;
}

.notification {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-small);
    color: white;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.notification::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    background: var(--success-color);
}

.notification-error {
    background: var(--error-color);
}

.notification-warning {
    background: var(--warning-color);
}

.notification-info {
    background: var(--primary-color);
}

/* Admin Styles */
.admin-page {
    background: var(--bg-primary);
}

.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 2rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.admin-main {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    min-height: 100vh;
}

.admin-logo {
    text-align: center;
    margin-bottom: 3rem;
    padding: 0 2rem;
}

.admin-logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin: 0;
    font-weight: 900;
}

.admin-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.admin-nav li {
    margin-bottom: 0.5rem;
}

.admin-nav a {
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(29, 233, 250, 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.admin-nav .icon {
    margin-right: 0.75rem;
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.admin-header h1 {
    color: var(--text-primary);
    font-size: 2.5rem;
    margin: 0;
}

.admin-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.admin-card h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.admin-table th,
.admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
}

.admin-table th[data-sort] {
    cursor: pointer;
    user-select: none;
}

.admin-table th[data-sort]:hover {
    background: var(--bg-primary);
}

.admin-table th[data-sort]::after {
    content: '↕';
    position: absolute;
    right: 0.5rem;
    opacity: 0.5;
}

.admin-table th[data-order="asc"]::after {
    content: '↑';
    opacity: 1;
}

.admin-table th[data-order="desc"]::after {
    content: '↓';
    opacity: 1;
}

.admin-table td {
    color: var(--text-secondary);
}

.admin-table tr:hover {
    background: var(--bg-secondary);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.admin-btn {
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-small);
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.admin-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.admin-btn.btn-danger {
    background: var(--error-color);
}

.admin-btn.btn-danger:hover {
    background: #d32f2f;
}

.admin-btn.btn-secondary {
    background: var(--text-muted);
}

.admin-btn.btn-secondary:hover {
    background: var(--text-secondary);
}

.admin-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Bulk Actions */
.bulk-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-small);
}

.bulk-action-select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-card);
    color: var(--text-primary);
}

.bulk-checkbox,
.select-all-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

/* Status Badges */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    display: inline-block;
}

.status-published {
    background: rgba(0, 230, 118, 0.2);
    color: var(--success-color);
}

.status-draft {
    background: rgba(158, 158, 158, 0.2);
    color: var(--text-muted);
}

.status-active {
    background: rgba(29, 233, 250, 0.2);
    color: var(--primary-color);
}

.status-inactive {
    background: rgba(255, 75, 125, 0.2);
    color: var(--error-color);
}

/* Search */
.search-container {
    position: relative;
    margin-bottom: 2rem;
}

.search-input {
    width: 100%;
    max-width: 400px;
    padding: 1rem 1rem 1rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(29, 233, 250, 0.2);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}

.search-results-count {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    margin: 2rem 0;
}

.chart {
    width: 100%;
    height: 100%;
}

/* Code Blocks */
pre {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 1rem;
    overflow-x: auto;
    color: var(--text-secondary);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

code {
    background: var(--bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
    color: var(--primary-color);
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success-color); }
.text-error { color: var(--error-color); }
.text-warning { color: var(--warning-color); }

.bg-primary { background: var(--primary-color); }
.bg-secondary { background: var(--bg-secondary); }
.bg-card { background: var(--bg-card); }

.border { border: 1px solid var(--border-color); }
.border-primary { border-color: var(--primary-color); }
.border-radius { border-radius: var(--border-radius); }
.border-radius-small { border-radius: var(--border-radius-small); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.transition { transition: var(--transition); }
.transition-fast { transition: var(--transition-fast); }

/* Responsive Admin */
@media (max-width: 1024px) {
    .admin-sidebar {
        width: 250px;
    }
    
    .admin-main {
        margin-left: 250px;
    }
}

@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
        z-index: 1001;
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
        padding: 1rem;
    }
    
    .admin-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .admin-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .admin-btn {
        width: 100%;
        justify-content: center;
    }
    
    .admin-table {
        font-size: 0.9rem;
    }
    
    .admin-table th,
    .admin-table td {
        padding: 0.75rem 0.5rem;
    }
    
    .bulk-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-input {
        max-width: none;
    }
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Form Enhancements */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.help-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.field-error {
    color: var(--error-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 2px rgba(255, 75, 125, 0.2);
}

/* File Upload */
.file-upload {
    position: relative;
    display: inline-block;
    cursor: pointer;
    width: 100%;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-secondary);
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.file-upload:hover .file-upload-label,
.file-upload.dragover .file-upload-label {
    border-color: var(--primary-color);
    background: rgba(29, 233, 250, 0.1);
    color: var(--primary-color);
}

.file-upload-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.file-upload-text {
    text-align: center;
}

.file-list {
    margin-top: 1rem;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    margin-bottom: 0.5rem;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.file-remove {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

/* Image Gallery */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.image-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--border-radius-small);
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.image-item:hover img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.image-item:hover .image-overlay {
    opacity: 1;
}

.image-actions {
    display: flex;
    gap: 0.5rem;
}

.image-action {
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.image-action:hover {
    background: var(--secondary-color);
}

/* Lazy Loading */
.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy.loaded {
    opacity: 1;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-text.medium {
    width: 80%;
}

.skeleton-text.long {
    width: 100%;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    height: 200px;
    border-radius: var(--border-radius);
}

/* Accessibility */
.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;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
}

.skip-link:focus {
    top: 6px;
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
textarea:focus,
select:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--bg-primary);
}

/* Performance Optimizations */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Error Pages */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 2rem;
}

.error-code {
    font-size: 8rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1;
}

.error-message {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.error-description {
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 600px;
}

/* Maintenance Mode */
.maintenance-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
}

.maintenance-icon {
    font-size: 4rem;
    color: var(--warning-color);
    margin-bottom: 2rem;
}

.maintenance-title {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.maintenance-message {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.maintenance-eta {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Coming Soon */
.coming-soon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.coming-soon-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.coming-soon-title {
    font-size: 3rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.coming-soon-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
}

.coming-soon-form {
    display: flex;
    gap: 1rem;
    max-width: 400px;
    width: 100%;
}

.coming-soon-input {
    flex: 1;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-card);
    color: var(--text-primary);
}

/* Final responsive adjustments */
@media (max-width: 480px) {
    .form-actions {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .coming-soon-form {
        flex-direction: column;
    }
    
    .error-code {
        font-size: 4rem;
    }
    
    .coming-soon-title {
        font-size: 2rem;
    }
    
    .maintenance-title {
        font-size: 2rem;
    }
    
    #notification-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
}

/* Print optimizations */
@media print {
    .admin-sidebar,
    .mobile-menu-toggle,
    .scroll-top-btn,
    #notification-container,
    .admin-actions,
    .bulk-actions {
        display: none !important;
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .admin-table {
        border: 1px solid #000;
    }
    
    .admin-table th,
    .admin-table td {
        border: 1px solid #000;
    }
}