/* Dark Theme Styles */
:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-primary: #4a9eff;
    --accent-hover: #6bb0ff;
    --danger: #ff4444;
    --success: #44ff44;
    --border: #444;
    --cell-revealed: #2a2a2a;
    --cell-unrevealed: #3a3a3a;
    --cell-hover: #4a4a4a;
    --cell-mine: #ff4444;
    --cell-flag: #ffa500;
    --cell-size: 48px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: stretch;
    margin: 0;
}

#app {
    width: 100%;
    height: 100vh;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.screen {
    display: none;
    flex: 1;
}

.screen.active {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.screen:not(#gameScreen) {
    padding: 40px 20px;
}

.container {
    background-color: var(--bg-secondary);
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: calc(100% - 40px);
    margin: auto;
}

h1 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--accent-primary);
    font-size: 2.5em;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-primary);
    font-size: 2em;
}

h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #4a4a4a;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 300px;
    margin: 0 auto;
}

.menu-buttons .btn {
    width: 100%;
}

.button-group {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

/* Forms */
.settings-form,
.join-form {
    max-width: 400px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input[type="number"],
.form-group input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 16px;
}

.form-group input[type="number"]:focus,
.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 10px;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Lobby */
.lobby-info {
    margin-bottom: 30px;
}

.room-code-display {
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.room-code-display strong {
    color: var(--accent-primary);
    font-size: 1.5em;
    letter-spacing: 3px;
}

.player-count {
    background-color: var(--bg-tertiary);
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

.player-list {
    background-color: var(--bg-tertiary);
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.overlay-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
}

#resetGameBtn {
    display: none;
}
.player-list ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.player-list li {
    color: var(--text-primary);
    font-weight: 500;
}

.game-settings-display {
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: 5px;
}

.game-settings-display p {
    margin: 8px 0;
}

/* Game Screen */
#gameScreen {
    flex: 1;
}

.game-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    background-color: var(--bg-primary);
    min-height: 0;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    position: sticky;
    top: 0;
    z-index: 5;
}

.game-info {
    display: flex;
    gap: 30px;
}

.game-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.highlight-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.highlight-toggle input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Game Board */
.board-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    overflow: auto;
    min-height: 0;
    min-width: 0;
}

.board-wrapper {
    position: relative;
    display: inline-block;
    margin: auto;
}

.board {
    display: inline-grid;
    gap: 4px;
    background-color: var(--border);
    border: 2px solid var(--border);
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: var(--cell-unrevealed);
    border: 1px solid var(--border);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-weight: bold;
    font-size: calc(var(--cell-size) * 0.4);
    user-select: none;
    transition: background-color 0.1s ease;
}

.cell:hover:not(.revealed) {
    background-color: var(--cell-hover);
}

.cell.revealed {
    background-color: var(--cell-revealed);
    cursor: default;
}

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

.cell.flagged {
    background-color: var(--cell-unrevealed);
}

.cell.flagged::after {
    content: '🚩';
    font-size: 16px;
}

.cell.mine::after {
    content: '💣';
    font-size: 16px;
}

.cell.double-mine::after {
    content: '💥';
    font-size: 16px;
}

.cell.highlighted {
    background-color: rgba(74, 158, 255, 0.3);
    border-color: var(--accent-primary);
}

.cursor-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.remote-cursor {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: translate(-50%, -50%);
    transition: left 0.18s ease, top 0.18s ease;
    pointer-events: none;
}

.remote-cursor__indicator {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: rgba(74, 158, 255, 0.9);
    border: 2px solid #ffffff;
    box-shadow: 0 0 8px rgba(74, 158, 255, 0.7);
}

.remote-cursor__label {
    margin-top: 4px;
    padding: 2px 8px;
    border-radius: 4px;
    background-color: rgba(26, 26, 26, 0.9);
    color: #ffffff;
    font-size: 12px;
    white-space: nowrap;
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.7);
}

/* Mine Count Colors */
.cell[data-count="1"] { color: #4a9eff; }
.cell[data-count="2"] { color: #44ff44; }
.cell[data-count="3"] { color: #ff4444; }
.cell[data-count="4"] { color: #aa44ff; }
.cell[data-count="5"] { color: #ff8800; }
.cell[data-count="6"] { color: #00ffff; }
.cell[data-count="7"] { color: #ff00ff; }
.cell[data-count="8"] { color: #ffffff; }

/* Game Over Overlay */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.overlay.active {
    display: flex;
}

.overlay-content {
    background-color: var(--bg-secondary);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    max-width: 500px;
}

.overlay-content h2 {
    margin-bottom: 20px;
}

.overlay-content p {
    margin-bottom: 30px;
    font-size: 1.2em;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --cell-size: 32px;
    }

    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.5em;
    }

    .game-header {
        flex-direction: column;
        gap: 15px;
    }

    .game-info {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    :root {
        --cell-size: 24px;
    }

    #app {
        padding: 10px;
    }

    .container {
        padding: 15px;
    }
}