* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    /* Dark theme variables */
    --primary-color: #6200ee;
    --primary-variant: #3700b3;
    --secondary-color: #03dac6;
    --secondary-variant: #018786;
    --background: #121212;
    --surface: #1e1e1e;
    --on-primary: #ffffff;
    --on-secondary: #000000;
    --on-background: #ffffff;
    --on-surface: #ffffff;
    --error: #cf6679;
    --cell-border: rgba(255, 255, 255, 0.1);
    --cell-revealed: rgba(255, 255, 255, 0.05);
    --hover-color: rgba(255, 255, 255, 0.1);
    --card-bg: #2d2d2d;
    --border-color: #444444;
    --primary-light: #7c4dff;
}

body {
    background-color: var(--background);
    color: var(--on-background);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: var(--surface);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 800px;
    transition: background-color 0.3s ease;
}

.header {
    margin-bottom: 20px;
}

.game-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.mines-counter, .timer {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--secondary-color);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#new-game-btn {
    background-color: var(--primary-color);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

#new-game-btn:hover {
    background-color: var(--primary-variant);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.difficulty {
    display: flex;
    flex-grow: 1;
    justify-content: space-between;
}

.difficulty button {
    flex: 1;
    margin: 0 5px;
    padding: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--on-background);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.difficulty button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.difficulty button:first-child {
    margin-left: 0;
}

.difficulty button.active {
    background-color: var(--primary-color);
    color: var(--on-primary);
}

.sound-controls {
    display: flex;
    margin-left: 10px;
}

.icon-button {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--on-background);
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    margin-left: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.icon-button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.icon-button i {
    font-size: 1.2rem;
}

/* Custom difficulty controls */
.custom-controls {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
    transition: all 0.3s ease;
    max-height: 500px;
    overflow: hidden;
}

.custom-controls.hidden {
    max-height: 0;
    padding: 0;
    margin-top: 0;
    opacity: 0;
}

.slider-container {
    margin-bottom: 15px;
}

.slider-container label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
}

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.2);
    outline: none;
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.slider::-webkit-slider-thumb:hover,
.slider::-moz-range-thumb:hover {
    width: 22px;
    height: 22px;
}

#apply-custom {
    background-color: var(--secondary-color);
    color: var(--on-secondary);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    width: 100%;
}

#apply-custom:hover {
    background-color: var(--secondary-variant);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

#game-container {
    display: flex;
    flex-direction: column;
}

.game-board {
    display: grid;
    gap: 1px;
    margin: 20px auto;
    max-width: 100%;
    overflow: auto;
}

.cell {
    width: 40px;
    height: 40px;
    background-color: var(--surface);
    border: 2px solid var(--cell-border);
    border-radius: 6px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s, border-color 0.2s, transform 0.2s;
}

.cell:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.cell.revealed {
    background-color: var(--cell-revealed);
    border: 2px solid var(--cell-revealed);
    transform: none;
    box-shadow: none;
}

.cell.flagged::before {
    content: "🚨";
}

.cell.question::before {
    content: "?";
    color: var(--secondary-color);
    font-weight: bold;
}

.cell.mine {
    background-color: var(--error);
}

/* Number colors */
.cell[data-number="1"] {
    color: #4fc3f7;
}

.cell[data-number="2"] {
    color: #66bb6a;
}

.cell[data-number="3"] {
    color: #ff8a65;
}

.cell[data-number="4"] {
    color: #7986cb;
}

.cell[data-number="5"] {
    color: #e57373;
}

.cell[data-number="6"] {
    color: #4db6ac;
}

.cell[data-number="7"] {
    color: #9575cd;
}

.cell[data-number="8"] {
    color: #f06292;
}

@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: 15px;
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
        box-shadow: none;
        display: flex;
        flex-direction: column;
    }

    .header {
        margin-bottom: 20px;
    }

    .game-info {
        flex-wrap: wrap;
        gap: 12px;
        justify-content: center;
    }

    .mines-counter, .timer {
        padding: 8px 16px;
        font-size: 1rem;
        min-width: 120px;
        text-align: center;
    }

    #new-game-btn {
        padding: 12px 24px;
        font-size: 1rem;
        width: 100%;
        margin: 8px 0;
    }

    .controls-row {
        flex-direction: column;
        gap: 12px;
    }

    .difficulty {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        width: 100%;
    }

    .difficulty button {
        padding: 12px;
        font-size: 1rem;
        height: 45px;
    }

    .sound-controls {
        margin: 8px 0;
        justify-content: center;
    }

    .icon-button {
        width: 45px;
        height: 45px;
    }

    .game-board {
        margin: 15px auto;
        gap: 4px;
        padding: 10px;
        background: rgba(255, 255, 255, 0.03);
        border-radius: 12px;
    }

    .cell {
        width: 32px;
        height: 32px;
        font-size: 1rem;
        border-width: 1px;
    }

    /* Push footer to bottom on mobile */
    #game-container {
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .footer {
        margin-top: auto;
        padding: 20px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .cell {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }

    .game-info {
        flex-direction: column;
        align-items: stretch;
    }

    .mines-counter, .timer {
        text-align: center;
        width: 100%;
    }

    .difficulty button {
        height: 40px;
        padding: 8px;
    }

    .custom-controls {
        padding: 12px;
    }

    .slider-container {
        margin-bottom: 15px;
    }

    /* Improve slider touch targets */
    .slider::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    .slider::-moz-range-thumb {
        width: 24px;
        height: 24px;
    }
}

/* Add touch-friendly styles */
@media (hover: none) {
    .cell:hover {
        transform: none;
        box-shadow: none;
    }

    .share-button:hover {
        transform: none;
        box-shadow: none;
    }

    .cell:active {
        background-color: var(--hover-color);
    }

    .share-button:active {
        opacity: 0.8;
    }
}

/* Add safe area insets for modern mobile devices */
@supports (padding: max(0px)) {
    .container {
        padding-left: max(10px, env(safe-area-inset-left));
        padding-right: max(10px, env(safe-area-inset-right));
        padding-bottom: max(10px, env(safe-area-inset-bottom));
    }
}

/* Stats Panel */
.stats-panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--surface);
    border-radius: 12px;
    padding: 20px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 10;
    transition: all 0.3s ease;
    overflow: hidden;
}

.stats-panel.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, -60%);
}

.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.stats-header h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.stats-content {
    user-select: none;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    text-align: center;
    margin-bottom: 20px;
}

.stat-item {
    flex: 1;
}

.stat-title {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: var(--on-background);
    opacity: 0.8;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.stats-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin: 15px 0;
}

.best-times {
    margin-bottom: 15px;
}

.best-times h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.best-time-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.difficulty-label {
    font-size: 0.9rem;
}

.time-value {
    font-weight: bold;
}

.actions {
    display: flex;
    justify-content: center;
}

.action-button {
    background-color: var(--primary-color);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.action-button:hover {
    background-color: var(--primary-variant);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Confetti Canvas Styles */
.confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.confetti-canvas.hidden {
    display: none;
}

/* Game Completion Card */
.completion-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--surface);
    border-radius: 12px;
    padding: 20px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 20;
    transition: all 0.3s ease;
    overflow: hidden;
    border: 1px solid var(--secondary-color);
}

.completion-card.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, -60%);
}

.completion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.completion-header h3 {
    margin: 0;
    font-size: 1.4rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.completion-content {
    user-select: none;
}

.completion-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: 10px;
}

.completion-stat {
    text-align: center;
    flex: 1;
}

.stat-label {
    font-size: 0.8rem;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.completion-stat .stat-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.completion-message {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.4;
}

.social-share {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    gap: 10px;
    flex-wrap: wrap;
}

.share-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 15px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    min-width: 100px;
}

.share-button i {
    margin-right: 6px;
}

.share-button.twitter {
    background-color: #1da1f2;
    color: white;
}

.share-button.copy {
    background-color: var(--primary-color);
    color: white;
}

.share-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

.share-button:active {
    transform: translateY(0);
}

.completion-actions {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.completion-actions .action-button {
    flex: 1;
    padding: 10px;
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    color: var(--on-secondary);
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
    z-index: 1000;
    transition: all 0.3s ease;
}

.toast.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 20px);
}

/* Footer styles */
.footer {
    margin-top: 30px;
    padding: 15px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}