/* ==========================================================================
   JEU : FUSION 2048 (STYLES SPÉCIFIQUES)
   ========================================================================== */

/* ==========================================================================
   1. LAYOUT & INTERFACE
   ========================================================================== */

.memory-container {
    width: 100%; height: 100%; padding: 1.5rem;
    flex: 1;
    display: flex; flex-direction: column; 
    justify-content: space-between; align-items: center;
    position: relative; z-index: 2;
    transition: opacity 0.3s ease;
    cursor: default; 
    touch-action: none; /* Bloque le scroll et pull-to-refresh natifs */
}

#game-over-overlay.visible ~ .memory-container {
    opacity: 0; pointer-events: none;
}

.hint-pause { display: none; }

.icon-btn, 
.settings-btn, 
.icon-btn svg, 
.settings-btn svg,
.back-btn,
.back-btn svg {
    transition: none !important;
    animation: none !important;
}

#status-overlay {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    cursor: pointer;
}
#status-overlay.hidden {
    display: none !important;
    opacity: 0;
}

.status-main-text {
    font-family: var(--font-heading); 
    font-size: 5.5rem; 
    font-weight: 500; 
    color: var(--text-primary); 
    letter-spacing: -4px; 
    line-height: 1; 
    transition: opacity 0.2s;
}

.status-sub-text {
    display: flex; align-items: center; justify-content: center;
    gap: 10px; margin-top: 1.5rem;
    font-family: var(--font-body); font-size: 1.1rem;
    color: var(--text-secondary); font-weight: 500;
    text-transform: uppercase; letter-spacing: 1px;
}

.status-sub-text svg {
    width: 24px; height: 24px;
    color: var(--text-primary); 
}

.game-board:fullscreen .status-main-text { font-size: 8.5rem; }
.game-board:fullscreen .status-sub-text { font-size: 1.5rem; margin-top: 2rem; }
.game-board:fullscreen .status-sub-text svg { width: 32px; height: 32px; }

.blurred { filter: blur(10px); opacity: 0.3; pointer-events: none; }

/* ==========================================================================
   2. LA GRILLE (CŒUR DU JEU)
   ========================================================================== */

.grid-wrapper {
    flex-grow: 1; 
    width: 100%; 
    display: flex; align-items: center; justify-content: center;
    position: relative;
    max-height: 100%; min-height: 0;
}

.grid-container {
    display: grid; 
    gap: 10px; 
    margin: auto; 
    width: 100%; height: auto;
    max-width: 450px; max-height: 100%; 
    aspect-ratio: 1 / 1;
    position: relative;
    cursor: default; 
    z-index: 1;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    background: var(--bg-main);
    padding: 10px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
}

.grid-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    border-radius: var(--radius-md);
    pointer-events: none;
}

.grid-wrapper.hidden { visibility: hidden; opacity: 0; pointer-events: none; }

.game-board:fullscreen .grid-container,
.ios-fullscreen .grid-container {
    max-width: none;
    height: 70vh; width: 70vh; 
    max-height: 90vw; max-width: 90vw;
}

.grid-tile {
    background: var(--card-bg); 
    border-radius: var(--radius-md); 
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 2rem;
    color: var(--text-primary);
    transition: transform 0.1s ease, background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, text-shadow 0.15s ease;
}

/* --- DÉGRADÉ EN 3 ACTES : PRIMAIRE -> SECONDAIRE -> RECORD --- */

/* Acte 1 : Ascension Primaire (2 à 64) */
.tile-2    { background: color-mix(in srgb, var(--accent-color) 15%, var(--card-bg)); }
.tile-4    { background: color-mix(in srgb, var(--accent-color) 30%, var(--card-bg)); }
.tile-8    { background: color-mix(in srgb, var(--accent-color) 45%, var(--card-bg)); color: #fff !important; }
.tile-16   { background: color-mix(in srgb, var(--accent-color) 65%, var(--card-bg)); color: #fff !important; }
.tile-32   { background: color-mix(in srgb, var(--accent-color) 85%, var(--card-bg)); color: #fff !important; }
.tile-64   { background: var(--accent-color); color: #fff !important; }

/* Acte 2 : Tension Secondaire (128 à 1024) */
.tile-128  { background: color-mix(in srgb, var(--accent-color-secondary) 40%, var(--card-bg)); color: #fff !important; font-size: 1.6rem !important; box-shadow: 0 0 10px color-mix(in srgb, var(--accent-color-secondary) 40%, transparent); }
.tile-256  { background: color-mix(in srgb, var(--accent-color-secondary) 60%, var(--card-bg)); color: #fff !important; font-size: 1.6rem !important; box-shadow: 0 0 15px color-mix(in srgb, var(--accent-color-secondary) 60%, transparent); }
.tile-512  { background: color-mix(in srgb, var(--accent-color-secondary) 80%, var(--card-bg)); color: #fff !important; font-size: 1.6rem !important; box-shadow: 0 0 20px color-mix(in srgb, var(--accent-color-secondary) 80%, transparent); }
.tile-1024 { background: var(--accent-color-secondary); color: #fff !important; font-size: 1.4rem !important; box-shadow: 0 0 25px var(--accent-color-secondary); }

/* Acte 3 : Victoire Record (2048 à 4096) */
.tile-2048 { background: var(--record-color, #f1c40f); color: #fff !important; font-size: 1.4rem !important; box-shadow: 0 0 35px var(--record-color, #f1c40f); text-shadow: 0 1px 3px rgba(0,0,0,0.3); }
.tile-4096 { background: color-mix(in srgb, white 30%, var(--record-color, #f1c40f)); color: #fff !important; font-size: 1.4rem !important; box-shadow: 0 0 45px var(--record-color, #f1c40f), 0 0 15px rgba(255,255,255,0.4); text-shadow: 0 2px 4px rgba(0,0,0,0.5); }

.tile-new {
    animation: appear 0.2s ease-in-out;
}
.tile-merged {
    animation: pop 0.2s ease-in-out;
}

@keyframes appear {
    0% { opacity: 0; transform: scale(0); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* ==========================================================================
   3. HEADER UI
   ========================================================================== */

.score-box { 
    flex-direction: column; 
    height: 72px; /* Fixé à 72px pour desktop */
    min-width: 120px;
    padding: 0 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 2px solid var(--border-color); /* Épaisseur à 2px (comme les icon-btn) */
    border-radius: var(--radius-md);
    background: var(--bg-main);
}
.label-small { 
    font-size: 0.75rem; text-transform: uppercase; 
    color: var(--text-secondary); font-weight: 700; 
}
.stat-box { 
    font-family: var(--font-heading); color: var(--text-primary); 
    font-size: 1.8rem; font-weight: 500; line-height: 1; 
}

/* FIX: empêche le saut visuel du temps */
#current-val {
    font-variant-numeric: tabular-nums;
    display: inline-block;
    min-width: 90px;
    text-align: center;
}

/* ==========================================================================
   4. ACTIONS (PAUSE)
   ========================================================================== */

.game-actions-row {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto; 
    margin-bottom: 0; 
}

.btn-paused-pending {
    opacity: 0.5; animation: pulse-pause 2s infinite;
    border-color: var(--accent-color) !important; color: var(--accent-color) !important;
}
.btn-paused-active {
    opacity: 1; animation: pulse-pause 1s infinite;
    border-color: var(--accent-color) !important; color: var(--accent-color) !important;
    background: var(--bg-main);
}
@keyframes pulse-pause {
    0% { transform: scale(1); }
    50% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

/* ==========================================================================
   5. UI RESULTATS ET GRAPHIQUES (RANKED / SANDBOX)
   ========================================================================== */
   
.mode-switch-wrapper {
    display: flex; position: relative; background-color: var(--bg-main);
    border: 1px solid var(--border-color); border-radius: var(--radius-md);
    padding: 4px; margin-bottom: 1.5rem;
}
.mode-switch-wrapper input[type="radio"] { display: none; }
.mode-switch-wrapper label {
    flex: 1; text-align: center; padding: 10px 0; font-family: var(--font-heading); font-weight: 600; font-size: 0.9rem;
    color: var(--text-secondary); cursor: pointer; z-index: 2; margin: 0; transition: color 0.3s ease; text-transform: uppercase; letter-spacing: 1px;
}
.mode-switch-wrapper input:checked + label { color: var(--text-primary); }
.mode-slider {
    position: absolute; top: 4px; bottom: 4px; width: calc(50% - 4px);
    background-color: var(--card-bg); border-radius: 6px; z-index: 1;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.mode-switch-wrapper input[value="sandbox"]:checked ~ .mode-slider { transform: translateX(100%); }

select {
    background-color: var(--bg-main); color: var(--text-primary);
    border: 1px solid var(--border-color); padding: 8px; border-radius: var(--radius-md);
    font-family: var(--font-body); font-size: 1rem; cursor: pointer; outline: none; width: auto;
}
select:focus { border-color: var(--accent-color); box-shadow: 0 0 0 2px var(--accent-glow); }

.results-view { width: 100%; display: flex; flex-direction: column; align-items: center; }
.results-view.hidden { display: none !important; }

#game-over-overlay .overlay-content { justify-content: center; gap: 1.5rem; }

.centered-score-item { text-align: center; margin-bottom: 3rem; }
.centered-score-item .res-label { font-size: 1.2rem; font-weight: 600; text-transform: uppercase; letter-spacing: 2px; opacity: 0.7; display: block; margin-bottom: 0.8rem; }
.big-score-container { display: flex; align-items: baseline; justify-content: center; position: relative; }
#results-ranked .res-value.big, #results-sandbox .res-value.big { font-size: 4.5rem; font-weight: 700; line-height: 1; font-family: var(--font-heading); }
.score-unit { font-size: 1.4rem; color: var(--accent-color); margin-left: 8px; font-family: var(--font-heading); font-weight: 500; }

.distribution-chart-container {
    position: relative; width: 100%; max-width: 650px; height: 180px;
    margin: 1.5rem 0 2rem 0;
    border-bottom: 2px solid var(--border-color); cursor: crosshair;
}
.curve-svg { width: 100%; height: 100%; overflow: visible; }
.axis-label { position: absolute; bottom: -25px; font-family: var(--font-body); font-size: 0.8rem; color: var(--text-secondary); }
.axis-label.left { left: 0; }
.axis-label.right { right: 0; }

.hover-line {
    position: absolute; top: 0; bottom: 0; width: 1px; background: var(--text-primary);
    transform: translateX(-50%); pointer-events: none; opacity: 0.3; z-index: 3; transition: opacity 0.2s ease;
}
.chart-tooltip {
    position: absolute; top: -55px; transform: translateX(-50%); background: var(--card-bg); border: 1px solid var(--border-color);
    padding: 6px 12px; border-radius: var(--radius-md); font-family: var(--font-body); font-size: 0.9rem; color: var(--text-primary); pointer-events: none;
    white-space: nowrap; z-index: 10; box-shadow: var(--shadow-card); text-align: center; line-height: 1.4; transition: opacity 0.2s ease, visibility 0.2s ease;
}
.hover-line.hidden, .chart-tooltip.hidden { opacity: 0 !important; visibility: hidden !important; }

.score-marker {
    position: absolute; top: 0; bottom: 0; display: flex; flex-direction: column; align-items: center;
    transform: translateX(-50%); pointer-events: none; transition: left 0.5s ease-out;
}
.marker-line { width: 2px; height: 100%; border-left: 2px dashed currentColor; }
.marker-label { position: absolute; font-family: var(--font-heading); font-size: 0.8rem; font-weight: 700; padding: 2px 6px; border-radius: 4px; text-transform: uppercase; white-space: nowrap; }
.marker-current { color: var(--accent-color); z-index: 2; }
.marker-current .marker-label { bottom: 100%; margin-bottom: 5px; background: var(--bg-main); border: 1px solid currentColor;}
.marker-best { color: var(--text-tertiary); z-index: 1; opacity: 1;}
.marker-best .marker-label { top: 100%; margin-top: 5px; color: var(--text-secondary); }

/* --- Stats Sandbox --- */
.sandbox-stats {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; 
    margin: 1.5rem 0 2rem 0; width: 100%; max-width: 600px;
}
.stat-box-small {
    background: transparent; border: 1px solid var(--border-color); padding: 12px 20px;
    border-radius: var(--radius-md); display: flex; flex-direction: column; align-items: center; min-width: 120px;
}
.stat-title { font-family: var(--font-heading); font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 5px; }
.stat-value { font-family: var(--font-heading); font-size: 1.4rem; font-weight: 600; color: var(--text-primary); }

#restart-btn { margin-top: 2rem; }

.exit-fs-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: none; 
    padding: 8px;
    z-index: 10000;
    transition: color var(--transition-fast);
}
.exit-fs-btn svg { width: 32px; height: 32px; }
.exit-fs-btn:hover { color: var(--accent-color-secondary); }
.game-board:fullscreen .exit-fs-btn { display: block; }
.ios-fullscreen .exit-fs-btn { display: block !important; }

/* ==========================================================================
   6. RESPONSIVE SPÉCIFIQUE
   ========================================================================== */

.game-page .main-content {
    display: flex;
    flex-direction: column;
}

.game-board {
    flex: 1 0 auto; 
    display: flex;
    flex-direction: column;
    min-height: 600px;
    margin-bottom: 0 !important; 
}

#game-over-overlay .overlay-content {
    height: auto;
    min-height: 100%;
    padding: 4rem 0; 
}

@media (max-width: 900px) { 
    .status-main-text { font-size: 5rem; } 
}

@media (max-width: 700px) {
    .score-box { 
        min-width: unset !important;
        height: 60px !important;      /* FIX: Hauteur fixe à 60px sur mobile */
        padding: 0 10px !important;   /* Léger ajustement pour s'assurer que le timer ne déborde pas */
        border-width: 2px !important; /* Maintien de l'épaisseur de 2px sur mobile */
    }
    .memory-container { padding: 1.5rem; padding-bottom: 2rem; }
    .status-main-text { font-size: 4rem; }
    .status-sub-text { font-size: 0.9rem; flex-wrap: wrap; }
    .stat-box { font-size: 1.5rem; }
    #results-ranked .res-value.big, #results-sandbox .res-value.big { font-size: 3.5rem; }
    .score-unit { font-size: 1.2rem; }
    .distribution-chart-container { height: 140px; margin-top: 1.5rem; margin-bottom: 2.5rem; }
    
    .sandbox-stats { gap: 0.5rem; margin: 1.5rem 0 2rem 0; flex-direction: column; align-items: center; }
    .stat-box-small { padding: 10px; min-width: 100px; }
    .stat-value { font-size: 1.2rem; }

    body.game-page { overscroll-behavior: none; }
    #settings-panel { touch-action: auto; overscroll-behavior: contain; }

    .game-page .main-content {
        display: flex !important;
        flex-direction: column !important;
        justify-content: flex-start !important; 
        height: auto !important; 
        min-height: calc(100svh - 80px) !important;
        padding-top: 80px !important;
        padding-bottom: 0 !important; 
        padding-left: 0 !important; 
        padding-right: 0 !important;
    }

    .game-board { 
        flex: 1 1 100% !important;     
        display: flex !important;      
        flex-direction: column !important; 
        height: auto !important;
        min-height: calc(100svh - 80px) !important; 
        max-height: none !important;
        margin: 0 !important;          
        border-radius: 0;              
    }

    #game-over-overlay { overflow-y: auto !important; }
    #game-over-overlay .overlay-content {
        height: auto !important;
        min-height: 100% !important;
        padding: 4rem 0 3rem 0 !important; 
        justify-content: center !important;
        gap: 2.5rem !important;
    }

    .game-page .game-board:fullscreen .memory-container,
    .ios-fullscreen .memory-container {
        padding-top: 3rem !important; 
        padding-bottom: 2rem !important;
    }
}

/* ==========================================================================
   7. FALLBACK PLEIN ECRAN
   ========================================================================== */

.game-board:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    border-radius: 0 !important;
    border: none !important;
    background-color: var(--bg-main);
    display: flex !important;
    flex-direction: column !important;
}

.ios-fullscreen {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100dvh !important;
    max-width: none !important;
    max-height: none !important;
    z-index: 9999 !important;
    border-radius: 0 !important;
    border: none !important;
    background-color: var(--bg-main) !important;
    display: flex !important;
    flex-direction: column !important;
}

.ios-fullscreen .exit-fs-btn { display: block !important; }
.ios-fullscreen ~ * #icon-expand { display: none !important; }
.ios-fullscreen ~ * #icon-compress { display: block !important; }

.new-record, 
#new-record-msg {
    color: var(--record-color, #FFA914) !important;
}

.new-record svg {
    color: var(--record-color, #FFA914) !important;
}

.input-select, select {
    background-color: var(--bg-main); color: var(--text-primary);
    border: 1px solid var(--border-color); padding: 8px; border-radius: var(--radius-md);
    font-family: var(--font-body); font-size: 0.95rem; cursor: pointer; outline: none;
    width: auto; min-width: 140px; max-width: 200px;
    text-align: center;
    text-align-last: center;
}