:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --error: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background: radial-gradient(circle at top right, #1e293b, var(--bg-darker));
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- Utilities --- */
.hidden { display: none !important; }

/* --- Login View --- */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
    margin-bottom: 8px;
    color: var(--primary);
}

.logo-area h1 {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-main);
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 32px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
    background: rgba(15, 23, 42, 0.8);
}

.error-hidden {
    color: var(--error);
    font-size: 0.875rem;
    margin-bottom: 16px;
    text-align: center;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}

.error-visible {
    opacity: 1;
    transform: translateY(0);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:active {
    transform: translateY(1px);
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

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

/* --- Gallery View --- */
.gallery-container {
    padding-bottom: 40px;
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.glass-nav {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
}

.nav-brand h2 {
    color: var(--text-main);
    font-size: 1.25rem;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.btn-secondary {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.875rem;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.content {
    padding: 40px 5%;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* Video Card Styles */
.video-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    border-color: rgba(59, 130, 246, 0.4);
}

.thumbnail-area {
    aspect-ratio: 16/9;
    background: rgba(0, 0, 0, 0.5);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.play-icon {
    width: 48px;
    height: 48px;
    background: rgba(59, 130, 246, 0.8);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    opacity: 0.8;
    transition: all 0.2s;
}

.video-card:hover .play-icon {
    opacity: 1;
    transform: scale(1.1);
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* --- Modal --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.glass-modal {
    background: var(--bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    width: 100%;
    max-width: 1000px;
    padding: 24px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.close-btn {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 28px;
    cursor: pointer;
    transition: color 0.2s;
    z-index: 101;
}

.close-btn:hover {
    color: white;
}

.video-wrapper {
    background: black;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16/9;
    margin-bottom: 16px;
}

video {
    width: 100%;
    height: 100%;
    outline: none;
}

#modal-title {
    font-size: 1.25rem;
    color: var(--text-main);
}