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

/* CSS变量定义 */
:root {
    --primary-color: #ff6b6b;
    --primary-dark: #ee5a52;
    --secondary-color: #4ecdc4;
    --success-color: #51cf66;
    --bg-dark: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #a8b2d1;
    --border-color: #2d3561;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.4);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 全局字体和背景 */
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-dark);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 107, 0.1) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 头部 */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: var(--bg-card);
    border-radius: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 主内容区域 */
main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
    max-width: 600px;
    margin: 0 auto 40px;
}

/* 区块标题 */
section h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 卡片样式 */
.calculator-card,
.add-fruit-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.calculator-card:hover,
.add-fruit-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

/* 输入组 */
.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.input-field {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: all 0.3s ease;
    outline: none;
}

.input-field:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.input-field::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.input-field.small {
    font-size: 1rem;
    padding: 12px 16px;
}

.input-field.large {
    font-size: 2rem;
    padding: 24px;
    text-align: center;
    font-weight: 600;
}

/* 快速选择按钮 */
.quick-select-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 30px;
}

.btn-quick {
    padding: 20px 28px;
    font-size: 1.4rem;
    font-weight: 700;
    border: 3px solid var(--border-color);
    border-radius: 16px;
    background: var(--bg-input);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-quick::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.btn-quick:hover::before {
    left: 100%;
}

.btn-quick:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    border-color: var(--primary-color);
}

.btn-quick:active {
    transform: translateY(-1px) scale(0.98);
}

.btn-quick.active {
    border-color: transparent;
    color: white;
    box-shadow: 0 8px 32px rgba(255, 107, 107, 0.6);
    transform: scale(1.05);
}

.btn-quick-durian.active {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    animation: pulse 2s infinite;
}

.btn-quick-jackfruit.active {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 8px 32px rgba(255, 107, 107, 0.6);
    }

    50% {
        box-shadow: 0 8px 40px rgba(255, 107, 107, 0.8);
    }
}

/* 高级设置 */
.advanced-settings {
    margin-top: 24px;
    background: var(--bg-input);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.advanced-settings summary {
    padding: 16px 20px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    user-select: none;
    list-style: none;
    transition: all 0.3s ease;
}

.advanced-settings summary::-webkit-details-marker {
    display: none;
}

.advanced-settings summary:hover {
    color: var(--primary-color);
}

.advanced-settings[open] summary {
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
}

.settings-content {
    padding: 20px;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

/* 按钮组 */
.button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

/* 按钮样式 */
.btn {
    flex: 1;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

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

.btn-primary {
    background: var(--gradient-2);
    color: white;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-danger {
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-edit {
    background: var(--secondary-color);
    color: white;
    padding: 8px 16px;
    font-size: 0.9rem;
    margin-right: 8px;
}

/* 结果显示 */
.result-display {
    background: var(--gradient-1);
    border-radius: 16px;
    padding: 24px;
    animation: slideIn 0.4s ease;
}

.result-display.hidden {
    display: none;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
    color: white;
}

.result-content {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.result-main {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 20px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

.result-details {
    font-size: 0.95rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.result-row:last-child {
    border-bottom: none;
}

.result-row.highlight {
    background: rgba(81, 207, 102, 0.1);
    padding: 10px;
    margin: 8px -10px 0;
    border-radius: 8px;
    border: 1px solid rgba(81, 207, 102, 0.3);
}

.result-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.result-value {
    font-weight: 600;
    color: white;
    font-size: 1rem;
}

.result-value.discount {
    color: #51cf66;
    font-weight: 700;
}

.result-value.final {
    font-size: 3.5rem;
    color: #ffd93d;
    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    font-weight: 700;
    line-height: 1;
}

/* 水果列表 */
.fruit-list {
    display: grid;
    gap: 12px;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 8px;
}

/* 自定义滚动条 */
.fruit-list::-webkit-scrollbar {
    width: 8px;
}

.fruit-list::-webkit-scrollbar-track {
    background: var(--bg-input);
    border-radius: 4px;
}

.fruit-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.fruit-list::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

.fruit-item {
    background: var(--bg-input);
    padding: 16px 20px;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.fruit-item:hover {
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.fruit-info {
    flex: 1;
}

.fruit-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.fruit-price {
    font-size: 1.1rem;
    color: var(--secondary-color);
    font-weight: 500;
}

.fruit-actions {
    display: flex;
    gap: 8px;
}

/* 内联输入组 */
.input-group-inline {
    display: flex;
    gap: 12px;
}

.input-group-inline .input-field {
    flex: 1;
}

.input-group-inline .btn {
    flex: 0 0 auto;
    min-width: 100px;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-card);
    border-radius: 16px;
    color: var(--text-secondary);
    box-shadow: var(--shadow);
}

/* 响应式设计 */
@media (max-width: 640px) {
    body {
        padding: 10px;
    }

    header {
        padding: 20px 15px;
        margin-bottom: 20px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    section h2 {
        font-size: 1.4rem;
    }

    .calculator-card,
    .add-fruit-card {
        padding: 20px;
    }

    .input-field.large {
        font-size: 1.8rem;
        padding: 20px;
    }

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

    .btn {
        font-size: 1rem;
        padding: 14px 20px;
    }

    .input-group-inline {
        flex-direction: column;
    }

    .input-group-inline .btn {
        width: 100%;
    }

    .result-value.final {
        font-size: 2.5rem;
    }

    .management-section {
        margin-top: 30px;
    }
}