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

body {
    font-family: 'Courier New', monospace;
    background: #000;
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Scanline effect */
.scanline {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
    opacity: 0.1;
    background: linear-gradient(to bottom, transparent, white, transparent);
    animation: scan 8s linear infinite;
}

@keyframes scan {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* Noise overlay */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 40;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' /%3E%3C/svg%3E");
}

.container {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Header */
.header {
    margin-bottom: 60px;
    text-align: center;
}

.title {
    font-size: 5rem;
    font-weight: bold;
    letter-spacing: 0.1em;
    text-shadow: 0 0 20px rgba(255,255,255,0.5);
    margin-bottom: 20px;
}

.glitch-text {
    font-size: 0.75rem;
    letter-spacing: 0.5em;
    color: #666;
}

/* Main content box */
.content-box {
    width: 100%;
    max-width: 900px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    padding: 2px;
}

.inner-box {
    border: 1px solid rgba(255,255,255,0.4);
    padding: 40px;
}

/* Code input */
.code-section {
    margin-bottom: 40px;
}

.code-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255,255,255,0.3);
    text-align: center;
    font-size: 1.5rem;
    padding: 20px;
    letter-spacing: 0.5em;
    color: #fff;
    font-family: 'Courier New', monospace;
    transition: all 0.3s;
}

.code-input:focus {
    outline: none;
    border-bottom-color: #fff;
}

.code-input::placeholder {
    color: rgba(255,255,255,0.2);
}

.error-message {
    margin-top: 20px;
    text-align: center;
    color: #ff0000;
    font-size: 0.875rem;
    letter-spacing: 0.3em;
    animation: pulse 1s infinite;
}

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

/* Buttons */
.button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.btn {
    padding: 20px;
    border: 1px solid rgba(255,255,255,0.4);
    background: transparent;
    color: #fff;
    font-size: 0.875rem;
    letter-spacing: 0.3em;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    transition: all 0.3s;
}

.btn:hover {
    background: #fff;
    color: #000;
}

/* Track list */
.track-container {
    border: 1px solid rgba(255,255,255,0.2);
    min-height: 400px;
    padding: 30px;
    background: rgba(0,0,0,0.5);
}

.locked-state {
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.locked-text {
    font-size: 0.75rem;
    letter-spacing: 0.3em;
}

.track-list {
    display: none;
}

.track-list.active {
    display: block;
}

.track-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
    gap: 15px;
}

.track-item:hover {
    background: rgba(255,255,255,0.05);
}

.track-name {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    flex: 1;
    min-width: 0;
}

.track-controls {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.play-btn {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255,255,255,0.4);
    background: transparent;
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    flex-shrink: 0;
}

.play-btn:hover {
    background: rgba(255,255,255,0.1);
}

.play-btn.playing {
    background: rgba(255,255,255,0.2);
}

.download-btn {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    opacity: 1;
    transition: all 0.3s;
    cursor: pointer;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.4);
    color: #fff;
    white-space: nowrap;
    flex-shrink: 0;
    padding: 10px 15px;
}

.download-btn:hover {
    background: rgba(255,255,255,0.1);
}

/* Audio player styling - hidden, controlled by play button */
.track-item audio {
    display: none;
}

/* Footer */
.footer {
    margin-top: 40px;
    text-align: center;
    color: rgba(255,255,255,0.2);
    font-size: 0.75rem;
    letter-spacing: 0.3em;
}

.footer div {
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 3rem;
    }

    .inner-box {
        padding: 20px;
    }

    .button-grid {
        grid-template-columns: 1fr;
    }

    .track-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
    }

    .track-name {
        width: 100%;
        margin-bottom: 15px;
        font-size: 0.8rem;
    }

    .track-controls {
        flex-direction: column;
        width: 100%;
    }

    .play-btn {
        width: 100%;
        height: 45px;
    }

    .download-btn {
        width: 100%;
        height: 45px;
        padding: 12px;
        font-size: 0.7rem;
    }

    .code-input {
        font-size: 1rem;
        letter-spacing: 0.3em;
    }

    .header {
        margin-bottom: 40px;
    }

    .glitch-text {
        font-size: 0.65rem;
    }
}

/* preview list */
.preview-container{
    border: 1px solid rgba(255,255,255,0.2);
    min-height: flex;
    padding: 30px;
    background: rgba(0,0,0,0.5);
}

.preview-title{
    font-size: 2rem;
    font-weight: bold;
    letter-spacing: 0.1em;
    text-shadow: 0 0 20px rgba(255,255,255,0.5);
    margin-bottom: 20px;
    text-align: center;
}

/* Popup */
.popup{
    width: 400px;
    background: #fff;
    border-radius: 6px;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.1);
    text-align: center;
    padding: 15px 30px 30px;
    color: #333;
    visibility: hidden;
    transition: transform 0.4s, top 0.4s;
}

.open-popup{
    visibility: visible;
    top: 50%;
    transform: translate(-50%, -50%) scale(1);
}

.popup h2{
    font-size: 38px;
    font-weight: 500;
    margin: 30px 0 10px;
}

.popup a{
    font-size: 15px;
    color: #7851A9;
}

.popup button{
    width: 100%;
    margin-top: 30px;
    padding: 10px 0;
    background: #6fd649;
    color: #fff;
    border: 0;
    outline: none;
    font-size: 18px;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}