/* =====================================================
   Canvas - Dedicated showcase surface styling
   ===================================================== */

/* Hide UI elements for clean canvas experience */
.canvas-page .md-content__button,
.canvas-page .md-source-file,
.canvas-page .share-actions,
.canvas-page h1:first-of-type {
    display: none !important;
}

.canvas-page .md-main {
    background: transparent;
}

.canvas-page .md-main__inner,
.canvas-page .md-content__inner {
    min-height: 100vh;
    background: transparent;
    box-shadow: none;
}

.canvas-placeholder {
    text-align: left;
    color: var(--md-default-fg-color);
    max-width: 720px;
    margin: clamp(2rem, 6vh, 4rem) auto;
    padding: 0 clamp(1.25rem, 6vw, 2.5rem);
}


.canvas-placeholder p {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.85;
    margin: 0 0 0.75rem;
}

.canvas-placeholder p:last-child {
    margin-bottom: 0;
}

.canvas-stage {
    background: var(--nav-surface, rgba(255, 255, 255, 0.9));
    border: 1px solid var(--nav-border, rgba(15, 23, 42, 0.08));
    border-radius: 1.25rem;
    padding: clamp(1.25rem, 2vw, 2rem);
    margin: 2.5rem auto;
    box-shadow: 0 35px 90px rgba(15, 23, 42, 0.18);
    max-width: 1200px;
    transition: max-width 0.3s ease, padding 0.3s ease;
}

[data-md-color-scheme="slate"] .canvas-stage {
    box-shadow: 0 35px 120px rgba(0, 0, 0, 0.55);
}

.canvas-stage[data-canvas-expanded="true"] {
    max-width: min(1400px, 96vw);
}

.canvas-stage__lead {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.canvas-stage__lead p {
    color: var(--md-default-fg-color);
    opacity: 0.85;
}

.canvas-stage__viewport {
    position: relative;
    width: 100%;
    min-height: clamp(320px, 55vh, 720px);
    border-radius: 1rem;
    overflow: hidden;
    background: radial-gradient(circle at top, rgba(255, 255, 255, 0.04), transparent 60%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: min-height 0.3s ease;
}

.canvas-stage[data-canvas-expanded="true"] .canvas-stage__viewport {
    min-height: min(85vh, 900px);
}

.canvas-stage__viewport canvas {
    position: absolute;
    inset: 0;
    width: 100% !important;
    height: 100% !important;
    pointer-events: auto;
}

.canvas-stage__controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: flex-start;
    margin: 1.75rem 0 1rem;
}

.canvas-stage__controls-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--md-default-fg-color);
    opacity: 0.6;
}

.canvas-mode {
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: transparent;
    color: var(--md-default-fg-color);
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.canvas-mode:hover {
    border-color: var(--md-primary-fg-color);
    color: var(--md-primary-fg-color);
}

.canvas-mode.is-active {
    background: var(--md-primary-fg-color);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 10px 25px rgba(7, 122, 109, 0.25);
}

.canvas-stage__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.25rem;
}

.canvas-stage__actions .md-button {
    flex-shrink: 0;
}

.canvas-stage__notice {
    margin: 0;
    font-size: 0.9rem;
    color: var(--md-default-fg-color);
    opacity: 0.75;
}

.canvas-stage__fallback {
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    color: var(--md-default-fg-color);
    font-size: 1rem;
}

[data-canvas-disabled="true"] .canvas-stage__fallback {
    display: flex;
}

[data-canvas-disabled="true"] .canvas-stage__viewport>*:not(.canvas-stage__fallback) {
    display: none;
}

@media screen and (max-width: 48rem) {
    .canvas-stage {
        margin: 1.5rem auto;
        padding: 1.25rem;
    }

    .canvas-stage__controls {
        flex-direction: column;
        align-items: stretch;
    }

    .canvas-mode {
        width: 100%;
        text-align: center;
    }

    .canvas-stage__actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .canvas-stage__actions .md-button {
        width: 100%;
    }
}

/* =====================================================
   Mobile/Tablet Touch Optimizations
   ===================================================== */

/* Touch hint overlay - shown briefly on mobile */
.canvas-touch-hint {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 0.75rem;
    color: #fff;
    font-size: 0.85rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.canvas-touch-hint.is-visible {
    opacity: 1;
}

.canvas-touch-hint__icon {
    font-size: 1.5rem;
}

.canvas-touch-hint__text {
    text-align: center;
    line-height: 1.4;
}

/* Viewport touch cursor */
.canvas-stage__viewport {
    cursor: grab;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

.canvas-stage__viewport:active {
    cursor: grabbing;
}

/* Tablet-specific adjustments */
@media screen and (min-width: 48rem) and (max-width: 64rem) {
    .canvas-stage__viewport {
        min-height: clamp(400px, 60vh, 600px);
    }
}

/* Mobile portrait */
@media screen and (max-width: 30rem) {
    .canvas-placeholder {
        padding: 0 1rem;
    }

    .canvas-placeholder p {
        font-size: 0.9rem;
    }

    .canvas-stage {
        margin: 1rem;
        padding: 1rem;
        border-radius: 1rem;
    }

    .canvas-stage__viewport {
        min-height: clamp(280px, 50vh, 400px);
        border-radius: 0.75rem;
    }

    .canvas-stage__lead {
        margin-bottom: 1rem;
    }

    .canvas-stage__lead p {
        font-size: 0.9rem;
    }

    .canvas-stage__controls {
        margin: 1.25rem 0 0.75rem;
        gap: 0.5rem;
    }

    .canvas-mode {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
}

/* Mobile landscape */
@media screen and (max-height: 30rem) and (orientation: landscape) {
    .canvas-stage {
        margin: 0.75rem auto;
        padding: 0.75rem;
    }

    .canvas-stage__viewport {
        min-height: clamp(200px, 45vh, 300px);
    }

    .canvas-stage__lead,
    .canvas-stage__controls,
    .canvas-stage__actions {
        display: none;
    }

    .canvas-placeholder {
        display: none;
    }
}

/* High DPI mobile optimization */
@media screen and (max-width: 48rem) and (-webkit-min-device-pixel-ratio: 2) {
    .canvas-stage__viewport canvas {
        image-rendering: optimizeSpeed;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .canvas-touch-hint {
        transition: none;
    }
}