:root {
    --primary: #00ffcc; /* Neon Cyan */
    --secondary: #bc13fe; /* Neon Purple */
    --accent: #ff0055; /* Neon Red/Pink */
    --background: #050510;
    --surface: rgba(10, 10, 25, 0.8);
    --text: #e0e0ff;
    --text-muted: #6b6b8b;
    --glass-border: rgba(0, 255, 204, 0.2);
    --glass-bg: rgba(0, 255, 204, 0.03);
    --neon-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
    --radius-lg: 4px; /* Industrial sharper edges */
    --radius-md: 2px;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-heading: 'Outfit', sans-serif;
}

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

.hidden {
    display: none !important;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

h1, h2, h3, .logo {
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Matrix Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.15;
}

.scanline {
    width: 100%;
    height: 100px;
    z-index: 10;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0) 0%, rgba(0, 255, 204, 0.05) 50%, rgba(0, 0, 0, 0) 100%);
    opacity: 0.1;
    position: fixed;
    bottom: 100%;
    animation: scanline 6s linear infinite;
    pointer-events: none;
}

@keyframes scanline {
    0% { transform: translateY(0); }
    100% { transform: translateY(100vh); }
}

/* Glass UI Elements */
.glass {
    background: var(--surface);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.glass-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(5, 5, 16, 0.9);
    border-bottom: 2px solid var(--primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--primary);
    text-shadow: var(--neon-shadow);
}

.logo-icon {
    font-size: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 5%;
}

/* Typography & Content */
.hero {
    text-align: center;
    padding: 3rem 0;
    border: 1px dashed var(--glass-border);
    background: var(--glass-bg);
    margin-bottom: 3rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.gradient-text {
    color: var(--primary);
    text-shadow: 0 0 15px rgba(0, 255, 204, 0.5);
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--primary);
    opacity: 0.8;
}

/* Buttons */
.primary-btn {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-mono);
    text-transform: uppercase;
    transition: all 0.3s;
    box-shadow: inset 0 0 5px rgba(0, 255, 204, 0.2);
}

.primary-btn:hover {
    background: var(--primary);
    color: var(--background);
    box-shadow: 0 0 20px var(--primary);
}

/* Filters */
.filters-section {
    margin-bottom: 3rem;
    background: rgba(0, 255, 204, 0.05);
    padding: 1.5rem;
    border-left: 4px solid var(--primary);
}

.filter-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 0.4rem 1rem;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

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

.chip.active {
    background: var(--primary);
    color: var(--background);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
}

/* Grid & Cards */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.grid-container.form-row {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    position: relative;
    padding: 0.5rem;
    transition: all 0.3s;
    overflow: hidden;
    cursor: pointer;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 0;
    background: var(--primary);
    transition: height 0.3s;
}

.card:hover {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2);
    transform: scale(1.02);
}

.card:hover::before {
    height: 100%;
}

.card-image {
    height: 150px;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    position: relative;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.card-image img.loaded {
    opacity: 1;
}

.card-image::after {
    content: 'ŠIFRUJI...';
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--primary);
    animation: pulse 1.5s infinite;
}

.card-image.has-image::after {
    display: none;
}

.card-content {
    padding: 1.5rem 1rem;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border: 1px solid currentColor;
    margin-right: 0.5rem;
}

.tag-subject { color: var(--primary); }
.tag-grade { color: var(--secondary); }

.card-title {
    font-size: 1.1rem;
    margin: 1rem 0;
    color: #fff;
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 1px;
}

.card-link:hover {
    text-shadow: 0 0 8px var(--primary);
}

/* Modal Overlay & Centering */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: #0a0a1a;
    border: 1px solid var(--primary);
    padding: 2.5rem;
    width: 95%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 0 40px rgba(0, 255, 204, 0.1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.modal-header h3 {
    font-family: var(--font-mono);
    color: var(--primary);
    font-size: 1.2rem;
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--accent);
}

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

input, select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text);
    outline: none;
    font-family: var(--font-mono);
}

input:focus, select:focus {
    border-color: var(--primary);
}

.submit-btn {
    width: 100%;
    background: var(--primary);
    color: var(--background);
    border: none;
    padding: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    font-family: var(--font-mono);
    margin-top: 1rem;
}

.submit-btn:hover {
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.4);
}

/* No results */
.no-results {
    font-family: var(--font-mono);
    color: var(--accent);
    padding: 2rem;
    text-align: center;
    border: 1px dashed var(--accent);
}

/* Admin List in Modal */
.modal-admin-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.modal-admin-section h4 {
    font-family: var(--font-mono);
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.admin-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.admin-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1rem;
    border: 1px solid var(--glass-border);
    transition: background 0.2s;
}

.admin-item:hover {
    background: rgba(0, 255, 204, 0.05);
}

.admin-item-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.admin-item-title {
    font-size: 0.95rem;
    font-weight: 600;
}

.admin-item-meta {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

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

.admin-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text);
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    transition: all 0.2s;
}

.admin-btn.edit:hover { 
    background: var(--primary); 
    color: var(--background);
    border-color: var(--primary);
}

.admin-btn.delete:hover { 
    background: var(--accent); 
    color: var(--text);
    border-color: var(--accent);
}

footer {
    padding: 4rem 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--glass-border);
}

/* =============================================
   LOGIN MODAL
   ============================================= */
.login-modal-content {
    max-width: 420px !important;
}

.login-subtitle {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.label-hint {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 400;
}

.login-error {
    background: rgba(255, 0, 85, 0.08);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 0.65rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-md);
}

.login-success {
    background: rgba(0, 255, 204, 0.08);
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.65rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-md);
}

.lockout-timer {
    background: rgba(188, 19, 254, 0.08);
    border: 1px solid var(--secondary);
    color: var(--secondary);
    padding: 0.65rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
    text-align: center;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%       { transform: translateX(-8px); }
    40%       { transform: translateX(8px); }
    60%       { transform: translateX(-5px); }
    80%       { transform: translateX(5px); }
}

.shake {
    animation: shake 0.45s ease;
}

.cancel-btn {
    width: 100%;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--glass-border);
    padding: 0.75rem;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-top: 0.5rem;
    transition: all 0.2s;
}

.cancel-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Admin footer with logout/change-password */
.admin-footer {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.admin-footer .admin-btn {
    flex: 1;
    padding: 0.6rem;
    font-size: 0.8rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .form-row { grid-template-columns: 1fr; }
}