/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: 'Noto Serif SC', 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #fef3f3 0%, #f0f9ff 50%, #f0fdf4 100%);
    color: #1a1a2e;
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

/* 主容器 */
.app-container {
    max-width: 700px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

/* 头部样式 */
.app-header {
    text-align: center;
    margin-bottom: 32px;
}

.app-title {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, #e11d48 0%, #f97316 50%, #eab308 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.app-subtitle {
    font-size: 15px;
    color: #64748b;
}

/* 输入区域 */
.input-section {
    margin-bottom: 32px;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
}

.char-input {
    width: 120px;
    height: 56px;
    font-size: 32px;
    text-align: center;
    border: 3px solid #e2e8f0;
    border-radius: 16px;
    outline: none;
    font-family: 'Ma Shan Zheng', cursive;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.char-input:focus {
    border-color: #e11d48;
    background: #fff;
    box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.1);
}

.char-input.error {
    border-color: #ef4444;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% {(5px); transform: translateX }
}

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: linear-gradient(135deg, #e11d48 0%, #f97316 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(225, 29, 72, 0.3);
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(225, 29, 72, 0.4);
}

.search-btn:active {
    transform: translateY(0);
}

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

/* 错误信息 */
.error-msg {
    text-align: center;
    color: #ef4444;
    font-size: 14px;
    margin-top: 8px;
    min-height: 20px;
}

/* 显示区域 */
.display-section {
    margin-bottom: 24px;
}

.character-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.character-target {
    width: 300px;
    height: 300px;
    background: #fefce8;
    border: 3px solid #fef08a;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.placeholder-text {
    text-align: center;
    color: #94a3b8;
}

.placeholder-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 12px;
    opacity: 0.5;
}

.placeholder-text p {
    font-size: 14px;
}

/* 网格控制 */
.grid-controls {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: #475569;
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.checkbox-label input:checked + .checkmark {
    background: #e11d48;
    border-color: #e11d48;
}

.checkbox-label input:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* 控制区域 */
.controls-section {
    margin-bottom: 24px;
}

.control-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
    color: #475569;
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.control-btn.primary {
    background: linear-gradient(135deg, #e11d48 0%, #f97316 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 14px rgba(225, 29, 72, 0.25);
}

.control-btn.primary:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(225, 29, 72, 0.35);
}

.control-btn.secondary:not(:disabled):hover {
    border-color: #e11d48;
    color: #e11d48;
}

/* 速度控制 */
.speed-control {
    background: #f8fafc;
    padding: 16px 24px;
    border-radius: 12px;
}

.speed-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #475569;
    margin-bottom: 12px;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.speed-mark {
    font-size: 12px;
    color: #94a3b8;
    min-width: 24px;
}

.speed-slider {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: #e2e8f0;
    border-radius: 4px;
    outline: none;
}

.speed-slider:disabled {
    opacity: 0.5;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #e11d48 0%, #f97316 100%);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(225, 29, 72, 0.3);
    transition: transform 0.2s ease;
}

.speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.speed-value {
    font-size: 14px;
    font-weight: 600;
    color: #e11d48;
    min-width: 40px;
    text-align: right;
}

/* 笔画信息 */
.stroke-info-section {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.stroke-counter, .current-stroke {
    background: #f0fdf4;
    padding: 12px 20px;
    border-radius: 12px;
    border: 2px solid #bbf7d0;
}

.stroke-label {
    font-size: 14px;
    color: #166534;
}

.stroke-number {
    font-size: 24px;
    font-weight: 700;
    color: #16a34a;
    margin-left: 8px;
    font-family: 'Ma Shan Zheng', cursive;
}

/* 示例区域 */
.examples-section {
    margin-bottom: 24px;
}

.examples-title {
    font-size: 14px;
    color: #64748b;
    margin-bottom: 12px;
    text-align: center;
}

.example-chars {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.example-btn {
    width: 48px;
    height: 48px;
    font-size: 24px;
    font-family: 'Ma Shan Zheng', cursive;
    background: #fef3f3;
    border: 2px solid #fecaca;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #e11d48;
}

.example-btn:hover {
    background: #e11d48;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(225, 29, 72, 0.3);
}

/* 页脚 */
.app-footer {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
}

.app-footer p {
    font-size: 12px;
    color: #94a3b8;
    margin-bottom: 4px;
}

.app-footer a {
    color: #e11d48;
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* 加载覆盖层 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid #fecaca;
    border-top-color: #e11d48;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    margin-top: 16px;
    font-size: 14px;
    color: #64748b;
}

/* 响应式设计 */
@media (max-width: 640px) {
    body {
        padding: 12px;
    }

    .app-container {
        padding: 24px 16px;
        border-radius: 16px;
    }

    .app-title {
        font-size: 28px;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .char-input {
        width: 100%;
        max-width: 200px;
    }

    .search-btn {
        width: 100%;
        justify-content: center;
    }

    .character-target {
        width: 280px;
        height: 280px;
    }

    .control-group {
        flex-direction: column;
    }

    .control-btn {
        width: 100%;
        justify-content: center;
    }

    .stroke-info-section {
        flex-direction: column;
        gap: 12px;
    }

    .stroke-counter, .current-stroke {
        width: 100%;
        text-align: center;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.app-container {
    animation: fadeIn 0.5s ease-out;
}

/* Hanzi Writer 样式覆盖 */
.hz-editor {
    border-radius: 16px;
}