:root {
    --bg-primary: #0a0e14;
    --bg-secondary: #151b24;
    --bg-tertiary: #1f2937;
    --accent-primary: #00ffcc;
    --accent-secondary: #ff00ff;
    --text-primary: #e8edf3;
    --text-secondary: #8b95a8;
    --border-color: #2d3748;
    --shadow-glow: 0 0 20px rgba(0, 255, 204, 0.3);
}

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

body {
    font-family: 'Archivo', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0d1117 50%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 204, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 0, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    position: relative;
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: slideDown 0.8s ease-out;
}

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

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 30px rgba(0, 255, 204, 0.5));
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.main-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    animation: fadeIn 1s ease-out 0.3s both;
}

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

.sidebar {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 2rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.media-type-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s ease;
}

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

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: var(--shadow-glow);
}

.file-browser {
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.file-browser::-webkit-scrollbar {
    width: 6px;
}

.file-browser::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.file-browser::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 3px;
}

.folder {
    margin-bottom: 0.5rem;
}

.folder-header {
    display: flex;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.folder-header:hover {
    background: var(--bg-primary);
    border-color: var(--accent-primary);
    transform: translateX(3px);
}

.folder-icon {
    margin-right: 0.5rem;
    font-size: 1.1rem;
    transition: transform 0.2s ease;
}

.folder.open .folder-icon {
    transform: rotate(90deg);
}

.folder-content {
    display: none;
    padding-left: 1.5rem;
    margin-top: 0.5rem;
}

.folder.open .folder-content {
    display: block;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 0.6rem 0.8rem;
    margin-bottom: 0.3rem;
    background: var(--bg-primary);
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

.file-item:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateX(5px);
    box-shadow: -3px 0 0 0 var(--accent-primary);
}

.file-item.active {
    background: linear-gradient(90deg, rgba(0, 255, 204, 0.15) 0%, transparent 100%);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: -3px 0 0 0 var(--accent-primary);
}

.file-icon {
    margin-right: 0.5rem;
    font-size: 1rem;
}

.player-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.player-container {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.player-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 255, 204, 0.03) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.player-placeholder {
    text-align: center;
    color: var(--text-secondary);
    z-index: 1;
}

.player-placeholder-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

video, audio {
    max-width: 100%;
    max-height: 500px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(201, 137, 225, 0.63);
    z-index: 1;
}

audio {
    width: 100%;
}

.now-playing {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
}

.now-playing-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.now-playing-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    color: var(--accent-primary);
    font-weight: 600;
}

.player-controls-row {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    z-index: 1;
}

.audio-track-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    font-family: 'Orbitron', sans-serif;
}

.audio-track-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.55rem 0.75rem;
    border-radius: 8px;
    outline: none;
    min-width: 220px;
    font-family: 'Archivo', sans-serif;
}

.audio-track-select:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.audio-track-hint {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 0.5rem;
    z-index: 1;
    text-align: center;
}


.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(6px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    padding: 1.75rem;
}

.login-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.4rem;
    color: var(--accent-primary);
    margin-bottom: 0.35rem;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.login-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0.9rem;
}

.login-row label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    font-family: 'Orbitron', sans-serif;
}

.login-row input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 0.85rem;
    border-radius: 10px;
    outline: none;
    font-family: 'Archivo', sans-serif;
}

.login-row input:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.login-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    align-items: center;
    justify-content: space-between;
}

.btn {
    cursor: pointer;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-primary {
    background: linear-gradient(135deg, #093c31 0%, var(--accent-secondary) 100%); 
    border-color: var(--accent-primary);
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: var(--shadow-glow);
}

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

.login-error {
    color: #ff6b6b;
    margin-top: 0.75rem;
    font-size: 0.9rem;
    display: none;
}

.topbar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
}


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

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    h1 {
        font-size: 2.5rem;
    }
}