@import url('https://fonts.googleapis.com/css?family=Comfortaa:400,700&display=swap');

:root {
    --bg-dark: #0a0a1a;
    --bg-mid: #1a1a2e;
    --bg-light: #16213e;
    --accent-green: #00e676;
    --accent-red: #ff5252;
    --accent-gold: #ffd740;
    --accent-cyan: #00e5ff;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --panel-bg: rgba(10, 10, 26, 0.9);
    --panel-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Comfortaa', sans-serif;
}

body {
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark), var(--bg-mid), var(--bg-light));
    color: var(--text-primary);
    width: 100vw;
    height: 100vh;
}

canvas {
    display: block;
}

/* Panels */
.panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    padding: 28px 36px;
    text-align: center;
    z-index: 30;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

/* Issue 1: Settings must sit above all other panels */
.settings-panel {
    z-index: 40;
}

.panel h2 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.panel h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

/* Home screen */
.home-panel {
    min-width: 280px;
}

.game-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 28px;
    color: var(--text-primary);
    text-shadow:
        0 0 20px rgba(0, 230, 118, 0.5),
        0 0 60px rgba(0, 230, 118, 0.2);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 28px;
    margin: 6px;
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    font-family: 'Comfortaa', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

.btn:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 15px rgba(0, 230, 118, 0.25);
    transform: translateY(-1px);
}

.btn:active {
    transform: scale(0.97);
    box-shadow: none;
}

.btn-primary {
    background: rgba(0, 230, 118, 0.15);
    border-color: var(--accent-green);
    display: block;
    width: 100%;
    margin: 8px 0;
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-primary:hover {
    background: rgba(0, 230, 118, 0.25);
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.3);
}

.btn-danger {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.btn-danger:hover {
    background: rgba(255, 82, 82, 0.15);
    box-shadow: 0 0 15px rgba(255, 82, 82, 0.25);
}

.btn-icon {
    position: fixed;
    top: 10px;
    right: 10px;
    padding: 6px 10px;
    border-radius: 8px;
    z-index: 20;
    background: rgba(0, 0, 0, 0.4);
}

.btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

.btn.disabled:hover {
    transform: none;
    box-shadow: none;
    border-color: rgba(255, 255, 255, 0.3);
}

/* Cards */
.card-container {
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 12px;
    margin: 16px 0;
}

.card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 16px;
    flex: 1 1 0;
    min-width: 180px;
    max-width: 280px;
    text-align: center;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.card p {
    flex: 1;
}

.card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 230, 118, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.card h3 {
    font-size: 0.95rem;
    color: var(--accent-green);
    margin-bottom: 8px;
}

.card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 12px;
}

/* Settings - z-index handled above, sizing here */
.settings-panel.settings-panel {
    min-width: 340px;
    max-width: 420px;
}

.settings-grid {
    text-align: left;
    margin-bottom: 12px;
}

.setting-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.setting-row strong {
    display: block;
    font-size: 0.85rem;
}

.setting-desc {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Toggle switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 42px;
    height: 24px;
    flex-shrink: 0;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    transition: 0.25s;
    border-radius: 24px;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: var(--text-secondary);
    transition: 0.25s;
    border-radius: 50%;
}

.toggle input:checked + .toggle-slider {
    background: rgba(0, 230, 118, 0.35);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(18px);
    background: var(--accent-green);
}

.experimental-title {
    color: var(--accent-gold);
    margin-top: 16px;
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.experimental-warn {
    font-size: 0.7rem;
    color: var(--accent-red);
    margin-bottom: 10px;
    opacity: 0.8;
}

/* Stats */
#stats {
    min-width: 420px;
}

.stats-grid {
    text-align: left;
    margin: 16px 0;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.stat-value {
    color: var(--accent-gold);
    font-weight: 700;
    font-size: 0.85rem;
}

/* Credits */
.credits {
    position: fixed;
    bottom: 8px;
    left: 8px;
    font-size: 10px;
    color: var(--text-secondary);
    z-index: 5;
}

.credits a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.credits a:hover {
    text-decoration: underline;
}

/* Demo panel */
.demo-panel {
    max-width: 500px;
    z-index: 50;
}

.demo-panel p {
    font-size: 0.8rem;
    line-height: 1.8;
    text-align: left;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Centered utility */
.centered {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 15;
}

/* Prevent hover/active transforms from breaking centered positioning */
.centered.btn:hover {
    transform: translate(-50%, -50%);
}

.centered.btn:active {
    transform: translate(-50%, -50%) scale(0.97);
}

/* Loading animation */
.loading-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* Scrollbar */
.panel::-webkit-scrollbar {
    width: 4px;
}

.panel::-webkit-scrollbar-track {
    background: transparent;
}

.panel::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}