:root {
    --bg-dark: #111115;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent: #3b82f6;
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --danger: #ef4444;
    --success: #10b981;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Glassmorphism Card */
.app-container .glass-card {
    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: 600px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    text-align: center;
}

h1 {
    margin-top: 0;
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    padding: 40px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.upload-area input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-content svg {
    color: var(--text-muted);
    margin-bottom: 15px;
}

.upload-content p {
    margin: 0;
    font-weight: 500;
}

.upload-content span {
    color: var(--accent);
    text-decoration: underline;
}

/* Progress Bar */
#status-container {
    margin-top: 25px;
    text-align: left;
}

.progress-bar-bg {
    background: rgba(255, 255, 255, 0.1);
    height: 6px;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

#progress-bar-fill {
    background: var(--accent);
    height: 100%;
    width: 0%;
    transition: width 0.2s ease;
}

#status-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Warning Box */
.warning-box {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    border-radius: 12px;
    padding: 15px;
    margin-top: 20px;
    text-align: left;
}

.warning-box h3 {
    color: var(--danger);
    margin: 0 0 5px 0;
    font-size: 1rem;
}

.warning-box p {
    font-size: 0.9rem;
    margin: 0;
}

/* Download Button */
#download-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 25px;
    width: 100%;
    transition: transform 0.2s, background 0.2s;
}

#download-btn:hover {
    transform: translateY(-2px);
    background-color: #2563eb;
}

/* Visual Log */
#console-log-display {
    margin-top: 20px;
    text-align: left;
    font-family: monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    max-height: 100px;
    overflow-y: auto;
    border-top: 1px solid var(--glass-border);
    padding-top: 10px;
}

.log-item {
    margin-bottom: 4px;
}

.log-success {
    color: var(--success);
}

.log-error {
    color: var(--danger);
}

.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 480px) {
    .app-container .glass-card {
        padding: 25px;
    }

    h1 {
        font-size: 1.5rem;
    }
}