/* ==============================================================================
   Minesweeper Stylesheet - High-Contrast 3D Squares & Mobile Screen Fit
   ============================================================================== */

:root {
    --bg-primary: #0a0f1d;
    --bg-secondary: #141e33;
    --bg-card: #141e33;
    --border-color: #263859;
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent-p1: #38bdf8;
    --accent-p1-glow: rgba(56, 189, 248, 0.4);
    --accent-p2: #f43f5e;
    --accent-p2-glow: rgba(244, 63, 94, 0.4);
    --accent-gold: #fbbf24;
    
    /* Grid Trench Background (Dark high contrast) */
    --grid-bg: #060912;
    --grid-border: #2e4369;
    
    /* Tactile 3D Square Tile Styles */
    --cell-bg-gradient: linear-gradient(145deg, #435b80 0%, #2a3a52 100%);
    --cell-border-highlight: #6e8dbd;
    --cell-border-shadow: #0f1624;
    --cell-revealed-bg: #0f172a;
    --cell-revealed-border: #1e2d44;
    --cell-radius: 4px;
    
    --c1: #38bdf8;
    --c2: #34d399;
    --c3: #f87171;
    --c4: #a78bfa;
    --c5: #f472b6;
    --c6: #22d3ee;
    --c7: #fb923c;
    --c8: #94a3b8;
    
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="retro"] {
    --bg-primary: #008080;
    --bg-secondary: #c0c0c0;
    --bg-card: #c0c0c0;
    --border-color: #808080;
    --text-primary: #000000;
    --text-muted: #333333;
    
    --grid-bg: #808080;
    --grid-border: #808080;
    
    --cell-bg-gradient: #c0c0c0;
    --cell-border-highlight: #ffffff;
    --cell-border-shadow: #707070;
    --cell-revealed-bg: #c0c0c0;
    --cell-revealed-border: #7b7b7b;
    --cell-radius: 0px;
    
    --c1: #0000ff;
    --c2: #008000;
    --c3: #ff0000;
    --c4: #000080;
    --c5: #800000;
    --c6: #008080;
    --c7: #000000;
    --c8: #808080;
    
    --shadow: none;
    --font-family: 'Tahoma', 'MS Sans Serif', sans-serif;
}

[data-theme="light"] {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --border-color: #cbd5e1;
    --text-primary: #0f172a;
    --text-muted: #64748b;
    
    --grid-bg: #cbd5e1;
    --grid-border: #94a3b8;
    
    --cell-bg-gradient: linear-gradient(145deg, #ffffff 0%, #e2e8f0 100%);
    --cell-border-highlight: #ffffff;
    --cell-border-shadow: #94a3b8;
    --cell-revealed-bg: #f8fafc;
    --cell-revealed-border: #cbd5e1;
    --cell-radius: 4px;
}

/* ==============================================================================
   Reset & Mobile Viewport Constraints
   ============================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 6px;
}

.container {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

/* ==============================================================================
   Header
   ============================================================================== */
header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

[data-theme="retro"] header {
    border: 2px outset #ffffff;
    border-radius: 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo-icon {
    font-size: 18px;
}

.logo-title {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="retro"] .logo-title {
    background: none;
    -webkit-text-fill-color: #000;
    font-weight: bold;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.btn-icon {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 5px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

[data-theme="retro"] .btn-icon {
    border: 2px outset #ffffff;
    border-radius: 0;
    background: #c0c0c0;
}

.btn-icon:hover {
    filter: brightness(1.15);
}

.btn-icon:active {
    transform: scale(0.95);
}

@media (max-width: 480px) {
    .btn-text {
        display: none;
    }
    .btn-icon {
        padding: 5px 6px;
    }
}

/* ==============================================================================
   Modes & Difficulty Bars
   ============================================================================== */
.modes-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    width: 100%;
}

@media (max-width: 400px) {
    .modes-bar {
        grid-template-columns: 1fr 1fr;
    }
}

.mode-tab {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 7px 4px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.mode-tab.active {
    color: #ffffff;
    background: linear-gradient(135deg, #0284c7, #4f46e5);
    border-color: transparent;
    box-shadow: 0 2px 6px rgba(2, 132, 199, 0.4);
}

[data-theme="retro"] .mode-tab {
    border: 2px outset #ffffff;
    border-radius: 0;
}

[data-theme="retro"] .mode-tab.active {
    background: #000080;
    color: #ffffff;
    border: 2px inset #ffffff;
}

.controls-bar {
    width: 100%;
}

.diff-select {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    width: 100%;
}

.diff-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 4px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
}

.diff-btn.active {
    background: var(--bg-secondary);
    border-color: var(--accent-p1);
    color: var(--accent-p1);
}

[data-theme="retro"] .diff-btn {
    border: 2px outset #ffffff;
    border-radius: 0;
}

[data-theme="retro"] .diff-btn.active {
    background: #000080;
    color: #ffffff;
    border: 2px inset #ffffff;
}

/* ==============================================================================
   Game Console Shell
   ============================================================================== */
.game-console {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
}

[data-theme="retro"] .game-console {
    border: 3px outset #ffffff;
    border-radius: 0;
    padding: 8px;
}

/* Multiplayer Scorecards */
.multiplayer-hud {
    display: none;
    width: 100%;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.multiplayer-hud.active {
    display: grid;
}

.player-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 8px;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.player-card.active-turn.p1 {
    border-color: var(--accent-p1);
    box-shadow: 0 0 10px var(--accent-p1-glow);
}

.player-card.active-turn.p2 {
    border-color: var(--accent-p2);
    box-shadow: 0 0 10px var(--accent-p2-glow);
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.player-name {
    font-weight: 800;
    font-size: 12px;
}

.p1 .player-name { color: var(--accent-p1); }
.p2 .player-name { color: var(--accent-p2); }

.turn-badge {
    font-size: 9px;
    font-weight: 800;
    padding: 1px 4px;
    border-radius: 999px;
    display: none;
}

.player-card.active-turn .turn-badge {
    display: inline-block;
}

.p1 .turn-badge { background: var(--accent-p1); color: #000; }
.p2 .turn-badge { background: var(--accent-p2); color: #fff; }

.player-stats {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
}

.stat-item {
    font-weight: 700;
}

.progress-container {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
}

.p1 .progress-bar { background: var(--accent-p1); }
.p2 .progress-bar { background: var(--accent-p2); }

/* Classic Top HUD (Mines, Smiley, Timer) */
.hud-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 5px 12px;
}

[data-theme="retro"] .hud-bar {
    border: 2px inset #808080;
    background: #c0c0c0;
    border-radius: 0;
}

.digital-display {
    background: #000000;
    color: #ff0000;
    font-family: 'Courier New', Courier, monospace;
    font-size: 20px;
    font-weight: 900;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 2px;
    min-width: 48px;
    text-align: center;
    border: 1px solid #333;
}

.smiley-btn {
    font-size: 26px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

[data-theme="retro"] .smiley-btn {
    border: 2px outset #ffffff;
    border-radius: 0;
    background: #c0c0c0;
}

.smiley-btn:active {
    transform: scale(0.92);
}

/* ==============================================================================
   Board Arena & HIGH-CONTRAST 3D SQUARES
   ============================================================================== */
.boards-wrapper {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    padding: 2px 0;
    -webkit-overflow-scrolling: touch;
}

.board-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    max-width: 100%;
}

.board-label {
    font-weight: 700;
    font-size: 12px;
    display: none;
}

.boards-wrapper.split-mode .board-label {
    display: block;
}

/* Outer Grid Box (Trench) */
.minesweeper-grid {
    display: grid;
    gap: 3px;
    background-color: var(--grid-bg);
    padding: 6px;
    border-radius: 8px;
    border: 2px solid var(--grid-border);
    box-shadow: inset 0 3px 8px rgba(0, 0, 0, 0.6), 0 3px 10px rgba(0, 0, 0, 0.3);
    touch-action: manipulation;
    margin: 0 auto;
}

[data-theme="retro"] .minesweeper-grid {
    border: 3px inset #ffffff;
    border-radius: 0;
    background: #808080;
    gap: 2px;
    padding: 4px;
    box-shadow: none;
}

/* The Individual 3D Tactile Square Tile */
.cell {
    background: var(--cell-bg-gradient);
    border-top: 3px solid var(--cell-border-highlight);
    border-left: 3px solid var(--cell-border-highlight);
    border-right: 3px solid var(--cell-border-shadow);
    border-bottom: 3px solid var(--cell-border-shadow);
    border-radius: var(--cell-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    cursor: pointer;
    position: relative;
    box-sizing: border-box;
    line-height: 1;
}

/* Hover & Active / Pressed */
.cell:hover:not(.revealed) {
    filter: brightness(1.2);
}

.cell:active:not(.revealed) {
    border-top: 3px solid var(--cell-border-shadow);
    border-left: 3px solid var(--cell-border-shadow);
    border-right: 3px solid var(--cell-border-highlight);
    border-bottom: 3px solid var(--cell-border-highlight);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6);
    transform: translateY(1px);
}

/* Retro Specifics */
[data-theme="retro"] .cell {
    background: #c0c0c0;
    border-top: 3px solid #ffffff;
    border-left: 3px solid #ffffff;
    border-right: 3px solid #707070;
    border-bottom: 3px solid #707070;
    box-shadow: none;
}

[data-theme="retro"] .cell:active:not(.revealed) {
    border-top: 3px solid #707070;
    border-left: 3px solid #707070;
    border-right: 3px solid #ffffff;
    border-bottom: 3px solid #ffffff;
}

/* Revealed Recessed Cell (Sunken) */
.cell.revealed {
    background: var(--cell-revealed-bg) !important;
    border: 1px solid var(--cell-revealed-border) !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5) !important;
    border-radius: calc(var(--cell-radius) * 0.7);
    cursor: default;
    transform: none !important;
}

[data-theme="retro"] .cell.revealed {
    border: 1px solid #7b7b7b !important;
    background: #c0c0c0 !important;
    box-shadow: none !important;
}

[data-theme="light"] .cell.revealed {
    background: #f8fafc !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08) !important;
}

/* 2P Revealed Tile Badges */
.cell.revealed-p1 {
    box-shadow: inset 0 0 0 2px var(--accent-p1) !important;
}

.cell.revealed-p2 {
    box-shadow: inset 0 0 0 2px var(--accent-p2) !important;
}

.cell.mine-exploded {
    background-color: #ef4444 !important;
    animation: shake 0.4s ease-in-out;
}

.cell.mine-claimed-p1 {
    background-color: rgba(56, 189, 248, 0.35) !important;
    border: 2px solid var(--accent-p1) !important;
}

.cell.mine-claimed-p2 {
    background-color: rgba(244, 63, 94, 0.35) !important;
    border: 2px solid var(--accent-p2) !important;
}

/* Clue Number Colors */
.cell[data-count="1"] { color: var(--c1); }
.cell[data-count="2"] { color: var(--c2); }
.cell[data-count="3"] { color: var(--c3); }
.cell[data-count="4"] { color: var(--c4); }
.cell[data-count="5"] { color: var(--c5); }
.cell[data-count="6"] { color: var(--c6); }
.cell[data-count="7"] { color: var(--c7); }
.cell[data-count="8"] { color: var(--c8); }

/* ==============================================================================
   Mobile Tool Switcher (Dig / Flag)
   ============================================================================== */
.mobile-tools {
    display: flex;
    gap: 8px;
    width: 100%;
    max-width: 280px;
    margin-top: 2px;
}

.tool-toggle-btn {
    flex: 1;
    padding: 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

.tool-toggle-btn.active {
    background: linear-gradient(135deg, #0284c7, #4f46e5);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(2, 132, 199, 0.4);
}

/* ==============================================================================
   Modals
   ============================================================================== */
.modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 12px;
}

.modal-backdrop.open {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    max-width: 360px;
    width: 100%;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-title {
    font-size: 16px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 6px;
}

.modal-body {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-muted);
}

.modal-body strong {
    color: var(--text-primary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, #0284c7, #4f46e5);
    color: #fff;
    border: none;
    padding: 7px 14px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 12px;
    cursor: pointer;
}

.form-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.form-input {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 4px 6px;
    border-radius: 4px;
    width: 70px;
    text-align: center;
    font-weight: bold;
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translate(0, 0); }
    20%, 60% { transform: translate(-3px, 3px); }
    40%, 80% { transform: translate(3px, -3px); }
}