/* ==========================================================================
   Sudoku.com Clone - Feuille de style principale (Clair, Sépia, Sombre)
   ========================================================================== */

:root,
[data-theme="light"] {
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-navbar: #ffffff;
    --text-primary: #212b36;
    --text-secondary: #6e7c8c;
    --accent-primary: #0072e3;
    --accent-hover: #005bb5;
    --accent-soft: #eaeef4;

    /* Couleurs Grille Sudoku.com */
    --board-border-outer: #344861;
    --board-border-box: #344861;
    --board-border-cell: #bec6d4;
    --cell-bg: #ffffff;
    --cell-selected: #bbdefb;
    --cell-related: #e2ebf3;
    --cell-same-num: #cbdbed;
    --cell-error-bg: #f7cfd6;
    --cell-hint-bg: #d1fae5;

    --digit-given: #344861;
    --digit-user: #0072e3;
    --digit-error: #e53935;
    --digit-note: #5a6b82;

    --shadow-sm: 0 2px 6px rgba(52, 72, 97, 0.08);
    --shadow-md: 0 8px 24px rgba(52, 72, 97, 0.12);
}

[data-theme="sepia"] {
    --bg-page: #f4ecd8;
    --bg-surface: #fbf6e9;
    --bg-navbar: #efe4ca;
    --text-primary: #3d3122;
    --text-secondary: #7a6852;
    --accent-primary: #b85d19;
    --accent-hover: #964910;
    --accent-soft: #e6d8bc;

    --board-border-outer: #59442b;
    --board-border-box: #59442b;
    --board-border-cell: #cbbba0;
    --cell-bg: #fbf6e9;
    --cell-selected: #f2cf9c;
    --cell-related: #efe2c6;
    --cell-same-num: #e5cfa3;
    --cell-error-bg: #f5c6cb;
    --cell-hint-bg: #cdeac0;

    --digit-given: #3d3122;
    --digit-user: #b85d19;
    --digit-error: #c92a2a;
    --digit-note: #6e5a44;
}

[data-theme="dark"] {
    --bg-page: #111827;
    --bg-surface: #1f2937;
    --bg-navbar: #1f2937;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-soft: #374151;

    --board-border-outer: #6b7280;
    --board-border-box: #6b7280;
    --board-border-cell: #374151;
    --cell-bg: #1f2937;
    --cell-selected: #1e40af;
    --cell-related: #283548;
    --cell-same-num: #1d4ed8;
    --cell-error-bg: #5c1f24;
    --cell-hint-bg: #064e3b;

    --digit-given: #e5e7eb;
    --digit-user: #60a5fa;
    --digit-error: #f87171;
    --digit-note: #9ca3af;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    user-select: none;
    -webkit-user-select: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* ==========================================================================
   Barre de Navigation
   ========================================================================== */
.navbar {
    background-color: var(--bg-navbar);
    border-bottom: 1px solid var(--board-border-cell);
    box-shadow: var(--shadow-sm);
    height: 62px;
    display: flex;
    align-items: center;
}

.navbar-container {
    max-width: 1040px;
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo {
    width: 34px;
    height: 34px;
    background: var(--accent-primary);
    color: #fff;
    border-radius: 6px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    padding: 2px;
    font-size: 9px;
    font-weight: 700;
    place-items: center;
}

.brand-title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.brand-dot {
    color: var(--accent-primary);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-icon-btn {
    background: var(--accent-soft);
    color: var(--text-primary);
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease;
}

.nav-icon-btn:hover {
    background: var(--board-border-cell);
}

.theme-switcher {
    display: flex;
    background: var(--accent-soft);
    padding: 3px;
    border-radius: 8px;
    gap: 2px;
}

.theme-btn {
    border: none;
    background: transparent;
    padding: 5px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.15s ease;
}

.theme-btn.active {
    background: var(--bg-surface);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Zone Principale & Barre Supérieure (Difficulté + Infos)
   ========================================================================== */
.main-container {
    max-width: 1000px;
    width: 100%;
    margin: 22px auto;
    padding: 0 20px;
    flex: 1;
}

.top-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 18px;
}

.difficulty-selector {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.difficulty-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: 6px;
}

.diff-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.diff-tab:hover {
    color: var(--accent-primary);
    background: var(--accent-soft);
}

.diff-tab.active {
    color: var(--accent-primary);
    background: var(--accent-soft);
}

.game-info-bar {
    display: flex;
    align-items: center;
    gap: 22px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.info-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.pause-icon-btn {
    background: var(--accent-soft);
    color: var(--text-secondary);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.pause-icon-btn:hover {
    background: var(--accent-primary);
    color: #fff;
}

/* ==========================================================================
   Workspace : Grille 9x9 + Contrôles
   ========================================================================== */
.game-workspace {
    display: grid;
    grid-template-columns: minmax(320px, 500px) 1fr;
    gap: 32px;
    align-items: start;
}

.board-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.sudoku-board {
    width: 100%;
    aspect-ratio: 1 / 1;
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    grid-template-rows: repeat(9, 1fr);
    border: 2.5px solid var(--board-border-outer);
    background-color: var(--cell-bg);
    box-shadow: var(--shadow-md);
    border-radius: 4px;
    overflow: hidden;
    outline: none;
}

.sudoku-cell {
    position: relative;
    border-right: 1px solid var(--board-border-cell);
    border-bottom: 1px solid var(--board-border-cell);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(1.35rem, 3.5vw, 2rem);
    font-weight: 500;
    cursor: pointer;
    background-color: var(--cell-bg);
    transition: background-color 0.08s ease;
}

/* Bordures épaisses des blocs 3x3 */
.sudoku-cell[data-col="2"],
.sudoku-cell[data-col="5"] {
    border-right: 2px solid var(--board-border-box);
}

.sudoku-cell[data-col="8"] {
    border-right: none;
}

.sudoku-cell[data-row="2"],
.sudoku-cell[data-row="5"] {
    border-bottom: 2px solid var(--board-border-box);
}

.sudoku-cell[data-row="8"] {
    border-bottom: none;
}

/* États visuels des cellules façon Sudoku.com */
.sudoku-cell.cell-related {
    background-color: var(--cell-related);
}

.sudoku-cell.cell-same-number {
    background-color: var(--cell-same-num);
}

.sudoku-cell.cell-selected {
    background-color: var(--cell-selected);
}

.sudoku-cell.cell-conflict,
.sudoku-cell.cell-wrong {
    background-color: var(--cell-error-bg);
}

.sudoku-cell.cell-hint-flash {
    background-color: var(--cell-hint-bg);
    animation: pulseHint 0.9s ease;
}

.sudoku-cell.cell-wave {
    animation: completionWave 0.55s ease;
}

@keyframes pulseHint {
    0% { transform: scale(0.92); }
    50% { transform: scale(1.06); }
    100% { transform: scale(1); }
}

@keyframes completionWave {
    0% { background-color: var(--cell-bg); }
    45% { background-color: var(--cell-selected); transform: scale(0.95); }
    100% { background-color: var(--cell-bg); transform: scale(1); }
}

/* Couleurs des chiffres */
.sudoku-cell.is-given .cell-value {
    color: var(--digit-given);
    font-weight: 600;
}

.sudoku-cell.is-user .cell-value {
    color: var(--digit-user);
    font-weight: 500;
}

.sudoku-cell.cell-wrong .cell-value,
.sudoku-cell.cell-conflict.is-user .cell-value {
    color: var(--digit-error);
}

/* Grille 3x3 des Notes (Crayon) dans chaque case */
.cell-notes-grid {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    padding: 2px;
    pointer-events: none;
}

.note-item {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(0.55rem, 1.2vw, 0.72rem);
    font-weight: 600;
    color: var(--digit-note);
    line-height: 1;
}

.note-item.note-highlight {
    color: var(--accent-primary);
    font-weight: 800;
}

/* Écran de Pause */
.pause-overlay {
    position: absolute;
    inset: 0;
    background: var(--bg-surface);
    border: 2.5px solid var(--board-border-outer);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.pause-card {
    text-align: center;
    padding: 24px;
}

.pause-card h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.pause-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* Bannière d'indice intelligent */
.hint-banner {
    margin-top: 12px;
    background: var(--bg-surface);
    border-left: 4px solid var(--accent-primary);
    box-shadow: var(--shadow-sm);
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.hint-banner-content strong {
    display: block;
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: 4px;
}

.hint-banner-content p {
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.hint-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
}

/* ==========================================================================
   Colonne Droite : Panneau de Contrôle & Pavé Numérique
   ========================================================================== */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
}

.new-game-btn {
    width: 100%;
    height: 54px;
    background-color: var(--accent-primary);
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.15s ease, transform 0.1s ease;
}

.new-game-btn:hover {
    background-color: var(--accent-hover);
}

.new-game-btn:active {
    transform: translateY(1px);
}

/* 4 boutons d'action circulaires façon Sudoku.com */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.action-btn {
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--text-primary);
}

.action-icon-circle {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent-soft);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.action-btn:hover .action-icon-circle {
    background-color: var(--cell-selected);
}

.action-btn.active .action-icon-circle {
    background-color: var(--accent-primary);
    color: #ffffff;
}

.action-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.status-badge {
    position: absolute;
    top: -4px;
    right: -6px;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 999px;
    border: 2px solid var(--bg-page);
}

.status-badge.off {
    background-color: #6e7c8c;
    color: #ffffff;
}

.status-badge.on,
.status-badge.count {
    background-color: var(--accent-primary);
    color: #ffffff;
}

/* Outils rapides secondaires */
.quick-tools-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.quick-tool-btn {
    background: var(--accent-soft);
    color: var(--text-primary);
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.quick-tool-btn:hover {
    border-color: var(--accent-primary);
}

.quick-tool-btn.active {
    background: var(--cell-selected);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Pavé numérique 3x3 sur Desktop */
.numpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.numpad-btn {
    height: 78px;
    background-color: var(--accent-soft);
    border: 2px solid transparent;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.12s ease;
}

.numpad-btn:hover {
    background-color: var(--cell-selected);
}

.numpad-btn.locked-digit {
    background-color: var(--accent-primary);
    border-color: var(--accent-hover);
}

.numpad-btn.locked-digit .num-digit,
.numpad-btn.locked-digit .num-remaining {
    color: #ffffff;
}

.numpad-btn.completed-digit {
    opacity: 0.25;
    pointer-events: none;
}

.num-digit {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    line-height: 1.1;
}

.num-remaining {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.keyboard-shortcuts-hint {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding-top: 4px;
}

/* ==========================================================================
   Modales
   ========================================================================== */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.55);
    backdrop-filter: blur(3px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
}

.modal-card {
    background: var(--bg-surface);
    color: var(--text-primary);
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.modal-card.modal-wide {
    max-width: 540px;
}

.center-text {
    text-align: center;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.modal-header h2 {
    font-size: 1.3rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.6rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.modal-subtitle {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 18px;
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.difficulty-modal-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.diff-modal-btn {
    background: var(--accent-soft);
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.15s ease;
}

.diff-modal-btn:hover {
    border-color: var(--accent-primary);
    background: var(--cell-related);
}

.diff-modal-btn span {
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent-primary);
}

.diff-modal-btn small {
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.primary-btn {
    width: 100%;
    padding: 12px 18px;
    background: var(--accent-primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.98rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease;
}

.primary-btn:hover {
    background: var(--accent-hover);
}

.secondary-btn {
    width: 100%;
    padding: 11px 18px;
    background: var(--accent-soft);
    color: var(--text-primary);
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.secondary-btn:hover {
    background: var(--board-border-cell);
}

.modal-actions-stack {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Grille Statistiques Victoire & Modale Stats */
.victory-stats-grid,
.stats-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.v-stat,
.stat-box {
    background: var(--accent-soft);
    padding: 12px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.v-stat-label,
.stat-box-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.v-stat-val,
.stat-box-val {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stats-diff-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 16px;
}

.stats-tab {
    flex: 1;
    background: var(--accent-soft);
    border: none;
    padding: 7px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
}

.stats-tab.active {
    background: var(--accent-primary);
    color: #fff;
}

/* Liste Paramètres */
.settings-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 20px;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
}

.setting-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.setting-text strong {
    font-size: 0.92rem;
}

.setting-text small {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.setting-row input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.modal-footer.between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.modal-footer.between .secondary-btn {
    width: auto;
}

.danger-link-btn {
    background: none;
    border: none;
    color: var(--digit-error);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   Responsive Mobile & Tablette
   ========================================================================== */
@media (max-width: 820px) {
    .game-workspace {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .controls-panel {
        max-width: 500px;
        margin: 0 auto;
    }

    .numpad {
        grid-template-columns: repeat(9, 1fr);
        gap: 6px;
    }

    .numpad-btn {
        height: 60px;
        border-radius: 8px;
    }

    .num-digit {
        font-size: 1.45rem;
    }

    .nav-btn-label,
    .keyboard-shortcuts-hint {
        display: none;
    }
}


/* ==========================================================================
   ANIMATIONS & RETOURS VISUELS
   (désactivables via Paramètres > Animations, ou prefers-reduced-motion)
   ========================================================================== */

.sudoku-cell { transition: background-color 0.15s ease; }

/* --- Anneau de sélection : un petit pulse quand on change de case --- */
.sudoku-cell.cell-selected::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    animation: selectRing 0.35s ease-out;
}
@keyframes selectRing {
    0%   { box-shadow: inset 0 0 0 4px var(--accent-primary); }
    100% { box-shadow: inset 0 0 0 0 transparent; }
}

/* --- Pose d'un chiffre : rebond élastique --- */
.sudoku-cell.anim-pop .cell-value {
    animation: cellPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes cellPop {
    0%   { transform: scale(0.3); opacity: 0.2; }
    60%  { transform: scale(1.25); opacity: 1; }
    100% { transform: scale(1); }
}

/* --- Erreur : secousse de la case + halo rouge sur la grille --- */
.sudoku-cell.anim-shake { animation: cellShake 0.4s ease; }
@keyframes cellShake {
    0%, 100% { transform: translateX(0); }
    15% { transform: translateX(-5px); }
    30% { transform: translateX(5px); }
    45% { transform: translateX(-4px); }
    60% { transform: translateX(4px); }
    75% { transform: translateX(-2px); }
    90% { transform: translateX(2px); }
}
.sudoku-board.board-error { animation: boardFlash 0.45s ease; }
@keyframes boardFlash {
    0%, 100% { box-shadow: var(--shadow-md); }
    30% { box-shadow: 0 0 0 4px rgba(229, 57, 53, 0.45), var(--shadow-md); }
}

/* --- Apparition de la grille (nouvelle partie), en diagonale --- */
.sudoku-cell.anim-enter {
    animation: cellEnter 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
    animation-delay: var(--d, 0ms);
}
@keyframes cellEnter {
    from { opacity: 0; transform: scale(0.6); }
    to   { opacity: 1; transform: scale(1); }
}

/* --- Points flottants (+120) --- */
.board-wrapper { position: relative; }
.float-score {
    position: absolute;
    z-index: 20;
    pointer-events: none;
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--digit-user);
    text-shadow: 0 1px 0 var(--bg-surface), 0 0 6px var(--bg-surface);
    white-space: nowrap;
    animation: floatUp 1s ease-out forwards;
}
.float-score.bonus { color: #f59e0b; font-size: 1.3rem; }
@keyframes floatUp {
    0%   { opacity: 0; transform: translate(-50%, 0) scale(0.6); }
    15%  { opacity: 1; transform: translate(-50%, -8px) scale(1.15); }
    100% { opacity: 0; transform: translate(-50%, -52px) scale(1); }
}

/* --- Compteurs (erreurs, score, indices) --- */
.info-item.pulse-error { animation: pulseError 0.5s ease; }
@keyframes pulseError {
    0%, 100% { transform: scale(1); }
    30% { transform: scale(1.25); color: var(--digit-error); }
}
.pulse-score { animation: scoreBump 0.35s ease; }
@keyframes scoreBump {
    0%, 100% { transform: scale(1); }
    40% { transform: scale(1.25); }
}

/* --- Pavé numérique : appui + chiffre complété --- */
.numpad-btn:active,
.action-btn:active .action-icon-circle,
.new-game-btn:active,
.primary-btn:active,
.secondary-btn:active,
.quick-tool-btn:active,
.diff-modal-btn:active { transform: scale(0.94); }

.numpad-btn.anim-digit-done { animation: digitDone 0.7s ease; }
@keyframes digitDone {
    0%   { transform: scale(1); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
    30%  { transform: scale(1.2); box-shadow: 0 0 0 7px rgba(34, 197, 94, 0.3); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

/* --- Modales, pause, bannière d'indice --- */
.modal-backdrop:not(.hidden) { animation: fadeIn 0.2s ease; }
.modal-backdrop:not(.hidden) .modal-card { animation: modalIn 0.28s cubic-bezier(0.34, 1.3, 0.64, 1); }
.pause-overlay:not(.hidden) { animation: fadeIn 0.25s ease; }
.hint-banner:not(.hidden) { animation: slideDown 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn {
    from { opacity: 0; transform: translateY(18px) scale(0.94); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.modal-backdrop:not(.hidden) .trophy-icon { animation: trophyBounce 1.1s ease 0.25s both; }
@keyframes trophyBounce {
    0%   { transform: scale(0) rotate(-30deg); }
    55%  { transform: scale(1.3) rotate(10deg); }
    75%  { transform: scale(0.92) rotate(-4deg); }
    100% { transform: scale(1) rotate(0); }
}
.modal-backdrop:not(.hidden) .error-icon { animation: cellShake 0.6s ease 0.2s; }

/* --- Confettis (canvas créé par effects.js) --- */
.confetti-canvas {
    position: fixed;
    inset: 0;
    z-index: 300;
    pointer-events: none;
}

/* --- Réglage du volume dans les paramètres --- */
.setting-row input[type="range"] {
    width: 120px;
    accent-color: var(--accent-primary);
}

/* --- Accessibilité : animations coupées (réglage ou préférence système) ---
   On réduit la durée plutôt que de supprimer l'animation, afin que les
   événements « animationend » continuent de nettoyer les classes. */
[data-anim="off"] *,
[data-anim="off"] *::before,
[data-anim="off"] *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-delay: 0ms !important;
        transition-duration: 0.001ms !important;
    }
}


/* ==========================================================================
   MOBILE & PWA
   ========================================================================== */
html {
    background-color: var(--bg-page);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    overscroll-behavior-y: contain;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    padding-bottom: env(safe-area-inset-bottom);
}

/* Supprime le délai / zoom du double-tap sur les zones de jeu */
button,
.sudoku-cell,
.numpad-btn,
.diff-tab {
    touch-action: manipulation;
}

.navbar {
    height: calc(62px + env(safe-area-inset-top));
    padding-top: env(safe-area-inset-top);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes sheetUp {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
}

/* Bannières PWA (mise à jour / astuce iOS) */
.toast {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    max-width: 460px;
    margin: 0 auto;
    background: var(--text-primary);
    color: var(--bg-surface);
    padding: 12px 14px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.88rem;
    line-height: 1.35;
    box-shadow: var(--shadow-md);
    z-index: 150;
    animation: slideUp 0.3s ease;
}
.toast-btn {
    background: var(--accent-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 9px 14px;
    font-weight: 700;
    font-size: 0.85rem;
    white-space: nowrap;
    cursor: pointer;
}

/* ---------- Téléphones & tablettes en portrait ---------- */
@media (max-width: 820px) {
    .navbar { height: calc(52px + env(safe-area-inset-top)); }
    .navbar-container { padding: 0 12px; }
    .navbar-actions { gap: 6px; }
    .brand-logo { width: 30px; height: 30px; }
    .brand-title { font-size: 1.2rem; }
    .nav-icon-btn { min-width: 38px; min-height: 38px; padding: 8px; justify-content: center; }
    .theme-btn { padding: 6px 8px; }

    .main-container { margin: 8px auto 12px; padding: 0 10px; }

    /* Difficulté : une seule ligne défilante au doigt */
    .top-bar { flex-direction: column; align-items: stretch; gap: 6px; margin-bottom: 8px; }
    .difficulty-selector {
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        gap: 2px;
        margin: 0 -10px;
        padding: 0 10px;
    }
    .difficulty-selector::-webkit-scrollbar { display: none; }
    .difficulty-label { display: none; }
    .diff-tab { flex: 0 0 auto; padding: 8px 12px; font-size: 0.85rem; white-space: nowrap; }

    .game-info-bar { justify-content: space-between; gap: 8px; padding: 0 4px; }
    .info-label { font-size: 0.75rem; }
    .info-value { font-size: 0.9rem; }

    .game-workspace { gap: 12px; }

    /* La grille occupe la largeur, mais jamais plus que la hauteur disponible */
    .board-wrapper { max-width: min(100%, max(288px, calc(100dvh - 400px))); }
    .sudoku-cell { font-size: clamp(1.25rem, 6vw, 1.9rem); }
    .note-item { font-size: clamp(0.55rem, 2.6vw, 0.72rem); }

    /* Contrôles dans l'ordre du pouce : actions, chiffres, outils, nouvelle partie */
    .controls-panel { gap: 10px; }
    .action-buttons { order: 1; gap: 6px; }
    .numpad { order: 2; gap: 4px; }
    .quick-tools-bar { order: 3; }
    .new-game-btn { order: 4; height: 46px; font-size: 1rem; }

    .action-icon-circle { width: 46px; height: 46px; }
    .action-icon-circle svg { width: 22px; height: 22px; }
    .action-label { font-size: 0.7rem; }
    .status-badge { font-size: 0.62rem; padding: 1px 5px; }

    .numpad-btn { height: 56px; border-radius: 8px; }
    .num-digit { font-size: 1.4rem; }
    .num-remaining { font-size: 0.62rem; }
    .quick-tool-btn { padding: 10px 8px; font-size: 0.78rem; }

    /* Indice : bandeau flottant en bas, sans pousser la mise en page */
    .hint-banner {
        position: fixed;
        left: 10px;
        right: 10px;
        bottom: calc(10px + env(safe-area-inset-bottom));
        margin: 0;
        z-index: 50;
        box-shadow: var(--shadow-md);
    }
    .hint-banner:not(.hidden) { animation: slideUp 0.3s ease; }

    /* Modales : feuilles qui montent du bas */
    .modal-backdrop { align-items: flex-end; padding: 0; }
    .modal-card,
    .modal-card.modal-wide {
        max-width: none;
        max-height: 92vh;
        max-height: 92dvh;
        overflow-y: auto;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
        border-radius: 18px 18px 0 0;
        padding: 20px 18px calc(20px + env(safe-area-inset-bottom));
    }
    .modal-backdrop:not(.hidden) .modal-card { animation: sheetUp 0.3s cubic-bezier(0.22, 1, 0.36, 1); }
    .modal-close { padding: 6px 10px; font-size: 1.8rem; }

    .stats-diff-tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
    .stats-diff-tabs::-webkit-scrollbar { display: none; }
    .stats-tab { flex: 0 0 auto; padding: 8px 12px; }

    .setting-row { padding: 4px 0; }
    .setting-row input[type="checkbox"] { width: 24px; height: 24px; }
}

@media (max-width: 480px) {
    .brand-title { display: none; }
}

@media (max-width: 380px) {
    .navbar-actions { gap: 4px; }
    .nav-icon-btn { min-width: 34px; padding: 7px; }
    .theme-btn { padding: 5px 6px; font-size: 0.8rem; }
    .numpad-btn { height: 50px; }
}

/* ---------- Téléphone en paysage : grille à gauche, contrôles à droite ---------- */
@media (orientation: landscape) and (max-height: 540px) {
    .navbar { height: calc(44px + env(safe-area-inset-top)); }
    .brand-title { display: none; }
    .main-container { max-width: none; margin: 6px auto; padding: 0 12px; }
    .top-bar { flex-direction: row; align-items: center; flex-wrap: nowrap; margin-bottom: 6px; gap: 10px; }
    .difficulty-selector { margin: 0; padding: 0; flex: 1; min-width: 0; }
    .game-info-bar { flex: 0 0 auto; gap: 14px; }

    .game-workspace { grid-template-columns: auto 1fr; gap: 16px; align-items: center; }
    .board-wrapper {
        width: calc(100dvh - 110px);
        max-width: calc(100dvh - 110px);
        min-width: 220px;
        margin: 0;
    }
    .controls-panel { max-width: none; gap: 8px; margin: 0; }
    .numpad { grid-template-columns: repeat(3, 1fr); gap: 6px; }
    .numpad-btn { height: 40px; }
    .num-digit { font-size: 1.25rem; }
    .num-remaining { display: none; }
    .action-icon-circle { width: 40px; height: 40px; }
    .action-label { display: none; }
    .new-game-btn { height: 40px; }
    .quick-tool-btn { padding: 7px 6px; }
}

/* ---------- App installée (mode standalone) ---------- */
@media (display-mode: standalone) {
    #btn-install { display: none !important; }
    body { -webkit-user-select: none; user-select: none; }
}