html {
    /* Remove touch delay: */
    touch-action: manipulation;
}

body {
    background: linear-gradient(135deg, #8e9eab 0%, #eef2f3 100%);
    font-family: "Ubuntu", Helvetica, Arial, sans-serif;
    transition: background 0.5s;
}

@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #232526 0%, #414345 100%);
    }
}

html,
body {
    overflow: hidden;
    margin: 0 !important;
    padding: 0 !important;
    height: 100%;
    width: 100%;
}

canvas {
    margin-right: auto;
    margin-left: auto;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: transparent;
    transition: box-shadow 0.3s;
    box-shadow: 0 0 32px 0 rgba(0, 0, 0, 0.1);
}

.centered {
    margin-right: auto;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #222;
    font-size: 24px;
    font-family: "Ubuntu", Helvetica, sans-serif;
    text-align: center;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 18px;
    box-shadow: 0 4px 32px 0 rgba(0, 0, 0, 0.1);
    padding: 36px 32px 32px 32px;
    min-width: 320px;
    max-width: 90vw;
    transition:
        background 0.4s,
        color 0.4s;
    animation: fadeIn 0.7s;
}

@media (prefers-color-scheme: dark) {
    .centered {
        background: rgba(32, 32, 32, 0.92);
        color: #f0f0f0;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.centered h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin: 0 0 12px 0;
    letter-spacing: 0.02em;
}

.centered p {
    font-size: 1.1rem;
    margin: 0 0 18px 0;
    color: #444;
}

@media (prefers-color-scheme: dark) {
    .centered p {
        color: #ccc;
    }
}

.lds-dual-ring {
    display: inline-block;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
}

.lds-dual-ring:after {
    content: " ";
    display: block;
    width: 46px;
    height: 46px;
    margin: 1px;
    border-radius: 50%;
    border: 5px solid #4e8cff;
    border-color: #4e8cff transparent #4e8cff transparent;
    animation: lds-dual-ring 1.2s linear infinite;
}

@media (prefers-color-scheme: dark) {
    .lds-dual-ring:after {
        border: 5px solid #90caf9;
        border-color: #90caf9 transparent #90caf9 transparent;
    }
}

@keyframes lds-dual-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.error-message {
    color: #ff4e4e;
    font-weight: 600;
    font-size: 1.15rem;
    margin-bottom: 12px;
    word-break: break-word;
}

.error-stack {
    font-size: 0.95rem;
    color: #fff;
    background: #222;
    padding: 10px 14px;
    border-radius: 6px;
    max-width: 80vw;
    overflow-x: auto;
    margin-bottom: 12px;
    text-align: left;
    font-family: "Ubuntu Mono", "Fira Mono", "Consolas", monospace;
}

.reload-btn {
    margin-top: 18px;
    font-size: 1.1rem;
    padding: 10px 28px;
    border: none;
    border-radius: 6px;
    background: linear-gradient(90deg, #4e8cff 0%, #1976d2 100%);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px 0 rgba(30, 80, 200, 0.1);
    transition:
        background 0.2s,
        box-shadow 0.2s;
}
.reload-btn:hover,
.reload-btn:focus {
    background: linear-gradient(90deg, #1976d2 0%, #4e8cff 100%);
    box-shadow: 0 4px 16px 0 rgba(30, 80, 200, 0.18);
    outline: none;
}

.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100vw;
    text-align: center;
    font-size: 0.98rem;
    color: #888;
    padding: 10px 0 8px 0;
    z-index: 20;
    pointer-events: none;
    user-select: none;
    letter-spacing: 0.01em;
}
@media (prefers-color-scheme: dark) {
    .footer {
        color: #aaa;
    }
}

/* Native app download banner */
.native-app-banner {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    max-width: 90vw;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.native-app-banner-content {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 12px 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    .native-app-banner-content {
        background: rgba(40, 40, 40, 0.95);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
}

.native-app-banner-icon {
    font-size: 1.4rem;
}

.native-app-banner-text {
    font-size: 0.95rem;
    color: #333;
    font-weight: 500;
}

@media (prefers-color-scheme: dark) {
    .native-app-banner-text {
        color: #eee;
    }
}

.native-app-banner-btn {
    background: linear-gradient(90deg, #4e8cff 0%, #1976d2 100%);
    color: #fff;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition:
        background 0.2s,
        box-shadow 0.2s;
    white-space: nowrap;
}

.native-app-banner-btn:hover {
    background: linear-gradient(90deg, #1976d2 0%, #4e8cff 100%);
    box-shadow: 0 2px 8px rgba(30, 80, 200, 0.3);
}

.native-app-banner-close {
    background: none;
    border: none;
    color: #888;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition:
        background 0.2s,
        color 0.2s;
}

.native-app-banner-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: #333;
}

@media (prefers-color-scheme: dark) {
    .native-app-banner-close {
        color: #aaa;
    }
    .native-app-banner-close:hover {
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
    }
}

/* Responsive adjustments for banner */
@media (max-width: 600px) {
    .native-app-banner-content {
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
        gap: 8px;
        padding: 10px 14px;
    }

    .native-app-banner-text {
        flex-basis: 100%;
        order: 1;
    }

    .native-app-banner-icon {
        order: 0;
    }

    .native-app-banner-btn {
        order: 2;
    }

    .native-app-banner-close {
        position: absolute;
        top: 4px;
        right: 4px;
        order: 3;
    }

    .native-app-banner {
        position: relative;
    }

    .native-app-banner-content {
        position: relative;
    }
}