:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --accent-color: #b5955c; /* Brass/Bronze */
    --accent-hover: #d4af37;
    --border-color: #333333;
    --font-header: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 {
    font-family: var(--font-header);
    font-weight: 400;
    margin: 0;
}

.hidden {
    display: none !important;
}

/* Overlay Styles */
.overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(18, 18, 18, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.5s ease;
}

.overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 4px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 350px;
}

.login-card h2 {
    color: var(--accent-color);
    font-size: 2rem;
    margin-bottom: 10px;
}

.login-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

.error-text {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 15px;
    min-height: 20px;
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    width: 100%;
    box-sizing: border-box;
}

header {
    text-align: center;
    margin-bottom: 50px;
}

header h1 {
    font-size: 3rem;
    color: var(--accent-color);
    letter-spacing: 2px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Workspace Layout */
.workspace {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.controls-column {
    flex: 1;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.display-column {
    flex: 2;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Inputs */
.input-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

input[type="file"], input[type="password"], select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 2px;
    box-sizing: border-box;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: border-color 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Buttons */
button, .btn-secondary {
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 2px;
    box-sizing: border-box;
    text-align: center;
    display: inline-block;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
    border: none;
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-primary:disabled {
    background: #555;
    color: #888;
    cursor: not-allowed;
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.btn-secondary:hover {
    background: rgba(181, 149, 92, 0.1);
}

#login-btn {
    background: var(--accent-color);
    color: var(--bg-color);
    border: none;
    font-weight: 600;
}

#login-btn:hover {
    background: var(--accent-hover);
}

/* Viewer Frame */
.viewer-frame {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    height: 600px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

model-viewer {
    width: 100%;
    height: 100%;
    --poster-color: transparent;
    background-color: #1a1a1a;
}

.status-container {
    position: absolute;
    text-align: center;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;
}

.placeholder-text {
    color: var(--text-muted);
    font-family: var(--font-header);
    font-size: 1.2rem;
    font-style: italic;
}

.pulsing-text {
    color: var(--accent-color);
    font-family: var(--font-header);
    font-size: 1.5rem;
    animation: pulse 2s infinite;
}

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

.download-section {
    display: flex;
    gap: 15px;
}

@media (max-width: 768px) {
    .workspace {
        flex-direction: column;
    }
    .viewer-frame {
        height: 400px;
    }
}