/**
 * Cupcake 2048 - Standard Acquisition Surface Styles
 * 
 * Implements the mode-aware design for the Google Sites / Embed route.
 * Focuses on immediate playability, mobile-first hierarchy, and CTA clarity.
 */

/* 1. Global Surface Reset */
.cupcake2048-standard.cupcake2048-embed-ready {
    background-color: var(--color-surface) !important;
    color: var(--color-text-primary) !important;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
}

.cupcake2048-standard-wrapper {
    background-color: var(--color-surface);
    min-height: 100vh;
    box-sizing: border-box;
    padding: var(--spacing-4) var(--spacing-2);
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 2. Above-the-Fold Hierarchy (Mobile First) */
.cupcake2048-standard .heading {
    width: 100%;
    max-width: var(--board-size-desktop);
    margin-bottom: var(--spacing-4);
    text-align: center;
}

.cupcake2048-standard .title {
    font-size: var(--font-size-3xl);
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--color-text-primary);
}

.cupcake2048-standard .title small {
    font-size: 0.6em;
    font-weight: 400;
    color: var(--color-brand);
    display: block;
}

/* 3. Scores & Controls */
/* 3. Scores & Controls (Refreshed TICKET-RUNTIME-UI-004) */
.cupcake2048-standard .scores-container {
    margin-top: var(--spacing-4);
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    width: 100%;
    max-width: var(--board-size-desktop);
    flex-wrap: wrap;
}

.cupcake2048-standard .score-container,
.cupcake2048-standard .best-container,
.cupcake2048-standard .score-points,
.cupcake2048-standard .best-points {
    position: relative;
    background: var(--color-surface-elevated) !important;
    border: 1px solid var(--color-border);
    padding: var(--spacing-6) var(--spacing-4) var(--spacing-2);
    border-radius: var(--radius-lg);
    min-width: 130px;
    height: 4.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    font-size: var(--font-size-base);
    font-weight: 800;
    color: var(--color-text-primary);
    text-align: center;
    flex: 1;
    box-sizing: border-box;
    float: none !important;
    width: auto !important;
}

/* Unified Labels for Standard Surface */
.cupcake2048-standard .score-container::before, 
.cupcake2048-standard .best-container::before,
.cupcake2048-standard .score-points::before,
.cupcake2048-standard .best-points::before {
    content: "";
    position: absolute;
    top: var(--spacing-2);
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    line-height: 1;
}

.cupcake2048-standard .score-container::before { content: "Cupcake Rank"; }
.cupcake2048-standard .best-container::before { content: "All-Time Best"; }
.cupcake2048-standard .score-points::before    { content: "Kcal Score"; }
.cupcake2048-standard .best-points::before     { content: "Kcal Best"; }

/* Vendor Label Suppression (Complete) */
.cupcake2048-standard .score-container:after, 
.cupcake2048-standard .best-container:after,
.cupcake2048-standard .score-points:after,
.cupcake2048-standard .best-points:after {
    content: none !important;
}

/* Score Addition Animation Harmony */
.cupcake2048-standard .score-container .score-addition {
    position: absolute;
    top: -20px;
    right: 0;
    font-size: var(--font-size-xl);
    font-weight: 900;
    color: var(--color-brand);
    animation: addition-slide-fade 600ms ease-out both;
}

@keyframes addition-slide-fade {
    0% { transform: translateY(0); opacity: 0; }
    30% { opacity: 1; }
    100% { transform: translateY(-40px); opacity: 0; }
}

.cupcake2048-standard .restart-button {
    display: inline-block;
    background: var(--color-brand);
    color: var(--color-text-inverse);
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-md);
    font-weight: 700;
    text-decoration: none;
    margin-top: var(--spacing-4);
    transition: transform var(--motion-duration-fast) var(--motion-ease-standard);
    cursor: pointer;
}

.cupcake2048-standard .restart-button:hover {
    transform: scale(1.05);
    background: var(--color-brand-muted);
}

/* 4. The Board (Contract-Critical Styles) */
.cupcake2048-standard .game-container {
    position: relative;
    padding: var(--grid-gap-desktop);
    cursor: default;
    background: var(--c2048-board-bg, var(--color-surface-elevated));
    border-radius: var(--radius-lg);
    width: var(--board-size-desktop);
    height: var(--board-size-desktop);
    box-sizing: border-box;
    box-shadow: var(--c2048-board-shadow, var(--shadow-lg));
    border: 2px solid var(--c2048-board-border, var(--color-border));
    background-clip: padding-box;
}

/* 4.1 Light Mode: Grid Separation (avoid regressing dark-mode vendor contrast) */
[data-theme="light"] .cupcake2048-standard .grid-cell {
    background: var(--c2048-cell-bg, rgba(15, 23, 42, 0.06));
    box-shadow: inset 0 0 0 1px var(--c2048-cell-border, rgba(15, 23, 42, 0.08));
}

/* Prevent white flash during movement by ensuring the tile has a non-white underlay
   and stays on a stable composited layer during transform transitions. */
.cupcake2048-standard .tile {
    will-change: transform;
}

.cupcake2048-standard .tile .tile-inner {
    background: var(--c2048-tile-underlay, rgba(255, 255, 255, 0.06)) !important;
    overflow: hidden;
    backface-visibility: hidden;
    transform: translateZ(0);
}

[data-theme="light"] .cupcake2048-standard .tile .tile-inner {
    box-shadow: var(--c2048-tile-shadow, 0 12px 22px rgba(15, 23, 42, 0.18));
    outline: 1px solid var(--c2048-tile-outline, rgba(255, 255, 255, 0.55));
    outline-offset: -1px;
}

.cupcake2048-standard .tile .tile-inner img {
    display: block;
    background-color: transparent;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* 5. Overlays (Loss/Win) */
.cupcake2048-standard .game-message {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: var(--color-surface-overlay);
    backdrop-filter: blur(8px);
    z-index: 100;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: var(--radius-lg);
    animation: fade-in var(--motion-duration-slow) var(--motion-ease-standard);
}

.cupcake2048-standard .game-message.game-won,
.cupcake2048-standard .game-message.game-over {
    display: flex;
}

.cupcake2048-standard .game-message p {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    margin-bottom: var(--spacing-6);
    color: var(--color-text-primary);
}

/* 6. Overlays CTAs */
.cupcake2048-standard .lower {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    width: 60%;
}

.cupcake2048-standard .retry-button,
.cupcake2048-standard .keep-playing-button,
.cupcake2048-standard .acquisition-cta {
    background: var(--color-brand) !important;
    color: var(--color-text-inverse) !important;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    font-weight: bold;
    text-decoration: none;
}

.cupcake2048-standard .acquisition-cta {
    background: var(--color-state-success) !important;
    display: inline-block !important;
    margin-top: var(--spacing-4);
    box-shadow: var(--shadow-md);
    transition: transform var(--motion-duration-fast) var(--motion-ease-standard);
    font-size: var(--font-size-base);
    padding: var(--spacing-3) var(--spacing-8) !important;
}

.cupcake2048-standard .acquisition-cta:hover {
    transform: translateY(-2px) scale(1.05);
    background: var(--color-state-success-muted) !important;
    box-shadow: var(--shadow-lg);
}

/* 7. Responsive Mobile Overrides */
@media screen and (max-width: 520px) {
    .cupcake2048-standard .game-container {
        width: var(--board-size-mobile);
        height: var(--board-size-mobile);
        padding: var(--grid-gap-mobile);
    }
    
    .cupcake2048-standard .title {
        font-size: var(--font-size-2xl);
    }
    
    .cupcake2048-standard .lower {
        width: 80%;
    }
}

/* 8. Supporting UI (Legend & Disclaimer) */
.cupcake2048-standard .game-explanation,
.cupcake2048-standard .tile-legend,
.cupcake2048-standard .disclaimer,
.cupcake2048-standard .credits {
    max-width: var(--board-size-desktop);
    width: 100%;
    margin-top: var(--spacing-8);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.cupcake2048-standard hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-8) 0;
    width: 100%;
}

.cupcake2048-standard .important {
    color: var(--color-text-primary);
    font-weight: bold;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}