/*
 * Feishu-Level Design System
 * 飞书级别设计系统 - 专业级UI增强
 * 参考：飞书、Notion、Linear的设计语言
 */

/* ==================== 设计令牌 (Design Tokens) ==================== */
:root {
    /* 主色板 - 高级蓝紫渐变 */
    --color-primary: #3370ff;
    --color-primary-hover: #5b8eff;
    --color-primary-active: #2760e8;
    --color-primary-bg: #f2f5ff;
    --color-primary-bg-hover: #e8eeff;

    /* 中性色 - 精细灰度系统 */
    --color-text-primary: #1f2329;
    --color-text-secondary: #646a73;
    --color-text-tertiary: #8f959e;
    --color-text-quaternary: #c9cdd4;
    --color-text-disabled: #dee0e3;

    /* 背景色 */
    --color-bg-1: #ffffff;
    --color-bg-2: #f7f8fa;
    --color-bg-3: #eff0f1;
    --color-bg-4: #e5e6eb;
    --color-bg-overlay: rgba(0, 0, 0, 0.6);

    /* 边框色 */
    --color-border-1: #e3e5e8;
    --color-border-2: #dee0e3;
    --color-border-3: #c9cdd4;

    /* 语义化颜色 */
    --color-success: #00b42a;
    --color-success-bg: #e8ffea;
    --color-warning: #ff7d00;
    --color-warning-bg: #fff7e8;
    --color-error: #f53f3f;
    --color-error-bg: #ffece8;
    --color-info: #3370ff;
    --color-info-bg: #f2f5ff;

    /* 阴影系统 */
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-2: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-3: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-4: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 0 1px rgba(0, 0, 0, 0.12), 0 6px 16px rgba(0, 0, 0, 0.08);
    --shadow-modal: 0 0 1px rgba(0, 0, 0, 0.16), 0 16px 48px rgba(0, 0, 0, 0.12);

    /* 圆角系统 */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    --radius-full: 9999px;

    /* 间距系统 (8px基准) */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;

    /* 字体系统 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                   "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                   Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;

    /* 字号系统 */
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 20px;
    --font-size-3xl: 24px;

    /* 行高 */
    --line-height-tight: 1.3;
    --line-height-base: 1.5;
    --line-height-loose: 1.7;

    /* 过渡时间 */
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 350ms;

    /* 缓动函数 */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background: var(--color-bg-2);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ==================== 精致的按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: 0 var(--spacing-4);
    height: 32px;
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
    overflow: hidden;
}

/* 主按钮 */
.btn-primary,
.btn-download {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 1px 2px rgba(51, 112, 255, 0.2);
}

.btn-primary:hover,
.btn-download:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: 0 2px 8px rgba(51, 112, 255, 0.3);
    transform: translateY(-1px);
}

.btn-primary:active,
.btn-download:active {
    background: var(--color-primary-active);
    border-color: var(--color-primary-active);
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(51, 112, 255, 0.2);
}

/* 次级按钮 */
.btn-secondary,
.btn-auth {
    background: var(--color-bg-1);
    color: var(--color-text-primary);
    border-color: var(--color-border-2);
}

.btn-secondary:hover,
.btn-auth:hover {
    background: var(--color-bg-2);
    border-color: var(--color-border-3);
}

.btn-secondary:active,
.btn-auth:active {
    background: var(--color-bg-3);
}

/* 按钮尺寸 */
.btn-sm {
    height: 28px;
    padding: 0 var(--spacing-3);
    font-size: var(--font-size-sm);
}

.btn-lg {
    height: 40px;
    padding: 0 var(--spacing-6);
    font-size: var(--font-size-lg);
}

/* 按钮禁用状态 */
.btn:disabled,
.btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* 按钮加载状态 */
.btn.loading {
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

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

/* ==================== 精致的输入框系统 ==================== */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea {
    width: 100%;
    padding: 0 var(--spacing-3);
    height: 32px;
    font-size: var(--font-size-base);
    line-height: 32px;
    color: var(--color-text-primary);
    background: var(--color-bg-1);
    border: 1px solid var(--color-border-1);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out);
    outline: none;
}

textarea {
    padding: var(--spacing-2) var(--spacing-3);
    height: auto;
    line-height: var(--line-height-base);
    resize: vertical;
}

input:hover,
textarea:hover {
    border-color: var(--color-border-3);
}

input:focus,
textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

/* 输入框状态 */
input.error,
textarea.error {
    border-color: var(--color-error);
    background: var(--color-error-bg);
}

input.error:focus,
textarea.error:focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(245, 63, 63, 0.1);
}

input.success,
textarea.success {
    border-color: var(--color-success);
    background: var(--color-success-bg);
}

/* ==================== 卡片系统 ==================== */
.card {
    background: var(--color-bg-1);
    border: 1px solid var(--color-border-1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1);
    transition: all var(--duration-base) var(--ease-out);
}

.card:hover {
    box-shadow: var(--shadow-card);
    border-color: var(--color-border-2);
    transform: translateY(-2px);
}

/* ==================== Toast优化 ==================== */
.toast-container {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    min-width: 280px;
    max-width: 420px;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-bg-1);
    border: 1px solid var(--color-border-1);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-modal);
    pointer-events: auto;
    opacity: 0;
    transform: translateX(100%);
    animation: toast-slide-in var(--duration-base) var(--ease-out) forwards;
}

.toast-show {
    animation: toast-slide-in var(--duration-base) var(--ease-out) forwards;
}

.toast-hide {
    animation: toast-slide-out var(--duration-base) var(--ease-in) forwards;
}

@keyframes toast-slide-in {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toast-slide-out {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: 14px;
}

.toast-success .toast-icon {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.toast-error .toast-icon {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.toast-warning .toast-icon {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.toast-info .toast-icon {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

/* ==================== 骨架屏优化 ==================== */
.skeleton,
.skeleton-line,
.loading-skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-3) 0%,
        var(--color-bg-2) 50%,
        var(--color-bg-3) 100%
    );
    background-size: 200% 100%;
    border-radius: var(--radius-sm);
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-line {
    height: 16px;
    margin-bottom: var(--spacing-2);
}

.skeleton-line.short {
    width: 60%;
}

/* ==================== 滚动条美化（飞书风格） ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-3);
    border-radius: var(--radius-full);
    transition: background var(--duration-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-quaternary);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-3) transparent;
}

/* ==================== 精致的焦点环 ==================== */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

/* ==================== 选择状态 ==================== */
::selection {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

/* ==================== 响应式断点 ==================== */
@media (max-width: 1440px) {
    :root {
        --font-size-base: 14px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-4: 12px;
        --spacing-6: 20px;
    }

    .toast-container {
        top: var(--spacing-4);
        right: var(--spacing-4);
        left: var(--spacing-4);
    }

    .toast {
        min-width: auto;
    }
}

/* ==================== 暗色模式支持 ==================== */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text-primary: #e5e6eb;
        --color-text-secondary: #c9cdd4;
        --color-text-tertiary: #8f959e;
        --color-bg-1: #1f2329;
        --color-bg-2: #141414;
        --color-bg-3: #2e3135;
        --color-border-1: #373a3f;
        --color-border-2: #4e5158;
    }
}

/* ==================== 微交互增强 ==================== */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width var(--duration-slow), height var(--duration-slow);
}

.ripple:active::after {
    width: 200px;
    height: 200px;
}

/* ==================== 无障碍优化 ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== 高对比度支持 ==================== */
@media (prefers-contrast: high) {
    :root {
        --color-border-1: #000000;
        --color-border-2: #000000;
    }
}