/* ====================================
   📸 摄影工具集 - 公共样式
   ==================================== */

/* CSS变量定义 */
:root {
    --primary-color: #FF6B35;
    --primary-dark: #E85D2A;
    --primary-light: #FF8C5F;
    --text-primary: #2C2C2C;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #E0E0E0;
    --bg-light: #FAFAFA;
    --bg-white: #FFFFFF;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    background: #F5F5F5;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部 */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 24px 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-button {
    padding: 10px 20px;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.back-button:hover {
    background: rgba(255,255,255,0.3);
}

/* 卡片 */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 表单元素 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input,
.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all 0.3s;
    background: var(--bg-white);
    color: var(--text-primary);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

.form-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* 按钮 */
.btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 107, 53, 0.4);
}

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

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 网格布局 */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

/* 结果展示 */
.result-box {
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8E0 100%);
    border: 2px solid rgba(255, 107, 53, 0.3);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-top: 20px;
}

.result-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: white;
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
}

.result-item:last-child {
    margin-bottom: 0;
}

.result-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.result-value {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 700;
}

/* 提示信息 */
.alert {
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.alert-info {
    background: #E3F2FD;
    border-left: 4px solid #2196F3;
    color: #1565C0;
}

.alert-warning {
    background: #FFF3E0;
    border-left: 4px solid #FF9800;
    color: #E65100;
}

.alert-success {
    background: #E8F5E9;
    border-left: 4px solid #4CAF50;
    color: #2E7D32;
}

/* 响应式 */
@media (max-width: 767px) {
    .header-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .header-title {
        font-size: 20px;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 16px;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 12px;
    background: rgba(0,0,0,0.9);
    color: white;
    font-size: 12px;
    border-radius: 6px;
    white-space: nowrap;
    margin-bottom: 8px;
}

/* 分隔线 */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: 24px 0;
}