/* ===================================
   简记memo - 全局样式变量
   =================================== */

:root {
    --primary-color: #4F9EDE;
    --primary-light: #67B8E3;
    --primary-dark: #3A8BC9;
    --secondary-color: #6366f1;
    --accent-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #ef4444;
    --success-color: #10b981;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
    
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --gradient-primary: linear-gradient(135deg, #4F9EDE 0%, #3A8BC9 100%);
    --gradient-secondary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

/* ===================================
   基础样式重置
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    transition: all 0.15s ease;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 158, 222, 0.08);
}

/* ===================================
   按钮样式
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 14px;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-0.5px);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* ===================================
   卡片样式
   =================================== */

.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}

.card-header {
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===================================
   表单样式
   =================================== */

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
}

.form-textarea {
    width: 100%;
    min-height: 80px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* ===================================
   布局样式
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-4 {
    gap: 16px;
}

.gap-6 {
    gap: 24px;
}

/* ===================================
   文字样式
   =================================== */

.text-sm {
    font-size: 12px;
}

.text-md {
    font-size: 14px;
}

.text-lg {
    font-size: 16px;
}

.text-xl {
    font-size: 20px;
}

.font-medium {
    font-weight: 500;
}

.font-semibold {
    font-weight: 600;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
}

/* ===================================
   状态提示
   =================================== */

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 13px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.08);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-error {
    background: rgba(239, 68, 68, 0.08);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: rgba(251, 191, 36, 0.08);
    color: #d97706;
    border: 1px solid rgba(251, 191, 36, 0.2);
}

/* ===================================
   响应式
   =================================== */

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .card {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    
    .container {
        padding: 0 12px;
    }
    
    .btn {
        padding: 10px 14px;
        font-size: 13px;
    }
    
    .card {
        padding: 12px;
    }
}