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

/* 主题变量 */
:root {
    --background-color: #f5f5f5;
    --text-color: #333;
    --primary-color: #2196F3;
    --primary-hover-color: #1976D2;
    --secondary-color: #e0e0e0;
    --secondary-hover-color: #d5d5d5;
    --border-color: #ddd;
    --cell-background: white;
    --cell-hover: #e3f2fd;
    --cell-selected: #bbdefb;
}

[data-theme="dark"] {
    --background-color: #121212;
    --text-color: #ffffff;
    --primary-color: #64b5f6;
    --primary-hover-color: #42a5f5;
    --secondary-color: #333333;
    --secondary-hover-color: #424242;
    --border-color: #424242;
    --cell-background: #1e1e1e;
    --cell-hover: #2c2c2c;
    --cell-selected: #3f51b5;
}

[data-theme="blue"] {
    --background-color: #e3f2fd;
    --text-color: #0d47a1;
    --primary-color: #1976d2;
    --primary-hover-color: #1565c0;
    --secondary-color: #bbdefb;
    --secondary-hover-color: #90caf9;
    --border-color: #64b5f6;
    --cell-background: #ffffff;
    --cell-hover: #e3f2fd;
    --cell-selected: #2196f3;
}

[data-theme="purple"] {
    --background-color: #f3e5f5;
    --text-color: #4a148c;
    --primary-color: #7b1fa2;
    --primary-hover-color: #6a1b9a;
    --secondary-color: #e1bee7;
    --secondary-hover-color: #ce93d8;
    --border-color: #ba68c8;
    --cell-background: #ffffff;
    --cell-hover: #f3e5f5;
    --cell-selected: #9c27b0;
}

[data-theme="green"] {
    --background-color: #e8f5e9;
    --text-color: #1b5e20;
    --primary-color: #388e3c;
    --primary-hover-color: #2e7d32;
    --secondary-color: #c8e6c9;
    --secondary-hover-color: #a5d6a7;
    --border-color: #81c784;
    --cell-background: #ffffff;
    --cell-hover: #e8f5e9;
    --cell-selected: #4caf50;
}

[data-theme="orange"] {
    --background-color: #fff3e0;
    --text-color: #e65100;
    --primary-color: #f57c00;
    --primary-hover-color: #ef6c00;
    --secondary-color: #ffe0b2;
    --secondary-hover-color: #ffcc80;
    --border-color: #ffb74d;
    --cell-background: #ffffff;
    --cell-hover: #fff3e0;
    --cell-selected: #ff9800;
}

[data-theme="pink"] {
    --background-color: #fce4ec;
    --text-color: #880e4f;
    --primary-color: #c2185b;
    --primary-hover-color: #ad1457;
    --secondary-color: #f8bbd0;
    --secondary-hover-color: #f48fb1;
    --border-color: #f06292;
    --cell-background: #ffffff;
    --cell-hover: #fce4ec;
    --cell-selected: #e91e63;
}

/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 2rem;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s ease;
}

.section {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--cell-background);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    height: 200px;
    width: 600px;
}

.section.active {
    display: block;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    text-align: center;
    font-size: 2rem;
    line-height: 1.3;
}

h2 {
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.required {
    color: #f44336;
}

input[type="text"],
input[type="number"],
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--cell-background);
    color: var(--text-color);
}

small {
    display: block;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 0.25rem;
}

.orientation-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}

.orientation-options label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
}

button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

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

button.secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

button.secondary:hover {
    background-color: var(--secondary-hover-color);
}

/* 主题选择框样式 */
.theme-switch-wrapper {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.theme-select {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--cell-background);
    color: var(--text-color);
    cursor: pointer;
    transition: border-color 0.2s;
}

.theme-select:hover {
    border-color: var(--primary-color);
}

.theme-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
}

/* 单词库管理样式 */
.wordbank-select {
    width: 100%;
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 1rem;
    background-color: var(--cell-background);
    color: var(--text-color);
}

#wordbank-section .button-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    justify-content: center;
}

#wordbank-section .form-group {
    margin-bottom: 2rem;
}

#manage-wordbank-button {
    margin-top: 0.5rem;
}

/* 游戏界面样式 */
.game-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: start;
}

.puzzle-grid {
    display: grid;
    gap: 2px;
    background-color: var(--border-color);
    padding: 2px;
    border-radius: 4px;
}

.puzzle-grid .cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--cell-background);
    color: var(--text-color);
    font-size: 1.25rem;
    font-weight: 500;
    user-select: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

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

.puzzle-grid .cell.found {
    transition: background-color 0.3s;
}

.puzzle-grid .cell.found.horizontal {
    background-color: #ffcdd2;
}

.puzzle-grid .cell.found.horizontal-back {
    background-color: #f8bbd0;
}

.puzzle-grid .cell.found.vertical {
    background-color: #e1bee7;
}

.puzzle-grid .cell.found.vertical-up {
    background-color: #d1c4e9;
}

.puzzle-grid .cell.found.diagonal {
    background-color: #c5cae9;
}

.puzzle-grid .cell.found.diagonal-up {
    background-color: #bbdefb;
}

.puzzle-grid .cell.found.diagonal-back {
    background-color: #b3e5fc;
}

.puzzle-grid .cell.found.diagonal-up-back {
    background-color: #b2ebf2;
}

.word-bank {
    background-color: var(--cell-background);
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.word-bank h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.word-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    padding: 1rem;
    background-color: var(--cell-background);
    border-radius: 8px;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.word-list .word {
    padding: 0.75rem 1rem;
    background-color: var(--cell-background);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.word-list .word:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.word-list .word.found {
    background-color: var(--secondary-color);
    border-color: var(--border-color);
    color: var(--text-color);
    text-decoration: line-through;
    opacity: 0.6;
}

@media (max-width: 768px) {
    .game-container {
        grid-template-columns: 1fr;
    }

    body {
        padding: 1rem;
    }

    .section {
        padding: 1rem;
    }

    .puzzle-grid .cell {
        font-size: 1rem;
    }
}