/* 
what's the good word? go jackets 
*/
:root {
    --gt-navy: #003057;
    --gt-gold: #B3A369;
    --gt-white: #FFFFFF;
}

html, body {
    border: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--gt-navy);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--gt-white);
}

#xr-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    margin: 0 0 10px 0;
    font-size: 2rem;
    font-weight: 600;
    color: var(--gt-gold);
}

p {
    margin: 0 0 30px 0;
    font-size: 1.1rem;
    opacity: 0.9;
}

button {
    padding: 16px 40px;
    border: none;
    border-radius: 8px;
    background-color: var(--gt-gold);
    color: var(--gt-navy);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(179, 163, 105, 0.4);
}

button:active {
    transform: translateY(0);
}

.controls {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.controls label {
    font-size: 0.95rem;
    opacity: 0.8;
}

.controls input[type="range"] {
    width: 250px;
    accent-color: var(--gt-gold);
}

#status {
    text-align: center;
    padding: 10px;
    color: var(--gt-white);
}

#loading-progress {
    margin-top: 10px;
    width: 280px;
    text-align: center;
    transition: opacity 0.6s ease;
}

#loading-progress .progress-bar {
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.15);
    overflow: hidden;
}

#loading-progress .progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 3px;
    background: var(--gt-gold);
    transition: width 0.2s ease;
}

#loading-progress .progress-text {
    margin-top: 8px;
    font-size: 0.8rem;
    opacity: 0.7;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

button:disabled:hover {
    transform: none;
    box-shadow: none;
}

#structure-select {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 10px 20px;
    margin-bottom: 16px;
    display: flex;
    gap: 16px;
    align-items: center;
}

#structure-select legend {
    font-size: 0.85rem;
    opacity: 0.7;
    padding: 0 6px;
}

#structure-select label {
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
}

#structure-select input[type="radio"] {
    accent-color: var(--gt-gold);
}

.nav-link {
    margin-top: 16px;
    color: var(--gt-gold);
    font-size: 0.9rem;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 1;
    text-decoration: underline;
}

.selector-row + button {
    margin-top: 28px;
}

.selector {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    max-width: 480px;
}

.selector-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.selector-label {
    font-size: 0.8rem;
    opacity: 0.65;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.sel-btn {
    padding: 8px 18px;
    border: 1px solid rgba(179, 163, 105, 0.4);
    border-radius: 6px;
    background: transparent;
    color: var(--gt-white);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.sel-btn:hover {
    border-color: var(--gt-gold);
    color: var(--gt-gold);
}

.sel-btn.active {
    background: var(--gt-gold);
    border-color: var(--gt-gold);
    color: var(--gt-navy);
    font-weight: 700;
}

#combo-status {
    margin-top: 32px;
}

.nav-group {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-btn {
    padding: 10px 20px;
    border: 1px solid rgba(179, 163, 105, 0.5);
    border-radius: 8px;
    background: transparent;
    color: var(--gt-gold);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.nav-btn:hover {
    background: rgba(179, 163, 105, 0.15);
    border-color: var(--gt-gold);
}

.nav-btn.active {
    background: rgba(179, 163, 105, 0.25);
    border-color: var(--gt-gold);
}