/**
 * DripSafe Theme - Toast通知 & 快捷键帮助
 * Round 10: 用户体验深度优化
 */

/* ============================================
   1. TOAST 通知系统 (增强版)
   ============================================ */

:root {
    /* Toast颜色变量 */
    --ds-toast-success-bg: rgba(6, 95, 70, 0.95);
    --ds-toast-success-border: #10B981;
    --ds-toast-error-bg: rgba(127, 29, 29, 0.95);
    --ds-toast-error-border: #EF4444;
    --ds-toast-info-bg: rgba(15, 23, 42, 0.92);
    --ds-toast-info-border: #0EA5E9;
    --ds-toast-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    --ds-toast-radius: 12px;
}

/* Toast容器 */
.ds-toast-container {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
    max-width: 90vw;
}

/* Toast基础样式 */
.ds-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: var(--ds-toast-radius);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    box-shadow: var(--ds-toast-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    pointer-events: auto;
    animation: ds-toast-in 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    border-left: 3px solid transparent;
}

.ds-toast.toast-exit {
    animation: ds-toast-out 0.3s ease-in forwards;
}

/* Toast图标 */
.ds-toast__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ds-toast__icon svg {
    width: 100%;
    height: 100%;
}

/* Toast文字 */
.ds-toast__text {
    flex: 1;
}

/* Toast成功 */
.ds-toast--success {
    background: var(--ds-toast-success-bg);
    border-left-color: var(--ds-toast-success-border);
}

.ds-toast--success .ds-toast__icon {
    color: #10B981;
}

/* Toast错误 */
.ds-toast--error {
    background: var(--ds-toast-error-bg);
    border-left-color: var(--ds-toast-error-border);
}

.ds-toast--error .ds-toast__icon {
    color: #EF4444;
}

/* Toast信息 */
.ds-toast--info {
    background: var(--ds-toast-info-bg);
    border-left-color: var(--ds-toast-info-border);
}

.ds-toast--info .ds-toast__icon {
    color: #0EA5E9;
}

/* Toast进入动画 */
@keyframes ds-toast-in {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Toast退出动画 */
@keyframes ds-toast-out {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
}

/* 移动端Toast位置 */
@media (max-width: 480px) {
    .ds-toast-container {
        bottom: 80px;
        width: calc(100vw - 32px);
    }
    
    .ds-toast {
        width: 100%;
        text-align: left;
    }
}


/* ============================================
   2. 骨架屏加载状态 (增强文章列表)
   ============================================ */

/* 骨架屏文章卡片 */
.ds-skeleton-card {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--ds-card-bg, #fff);
    border: 1px solid var(--ds-border, #E2E8F0);
    border-radius: var(--ds-radius-lg, 12px);
    margin-bottom: 16px;
    transition: opacity 0.2s ease;
}

.ds-skeleton-card--list {
    flex-direction: row;
}

.ds-skeleton-card--grid {
    flex-direction: column;
}

.ds-skeleton-card__thumb {
    flex-shrink: 0;
    background: var(--ds-skeleton-base, #E2E8F0);
    border-radius: var(--ds-radius, 8px);
    animation: ds-skeleton-pulse 1.5s ease-in-out infinite;
}

.ds-skeleton-card--list .ds-skeleton-card__thumb {
    width: 140px;
    height: 100px;
}

.ds-skeleton-card--grid .ds-skeleton-card__thumb {
    width: 100%;
    height: 180px;
}

.ds-skeleton-card__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.ds-skeleton-card__tag {
    width: 70px;
    height: 22px;
    border-radius: 12px;
    background: var(--ds-skeleton-base, #E2E8F0);
    animation: ds-skeleton-pulse 1.5s ease-in-out infinite;
}

.ds-skeleton-card__title {
    height: 20px;
    border-radius: 4px;
    background: var(--ds-skeleton-base, #E2E8F0);
    animation: ds-skeleton-pulse 1.5s ease-in-out infinite;
}

.ds-skeleton-card__title--short {
    width: 70%;
}

.ds-skeleton-card__title--medium {
    width: 85%;
}

.ds-skeleton-card__excerpt {
    height: 14px;
    border-radius: 4px;
    background: var(--ds-skeleton-base, #E2E8F0);
    animation: ds-skeleton-pulse 1.5s ease-in-out infinite;
}

.ds-skeleton-card__excerpt:nth-child(2) {
    width: 100%;
}

.ds-skeleton-card__excerpt:nth-child(3) {
    width: 60%;
}

.ds-skeleton-card__meta {
    display: flex;
    gap: 16px;
    margin-top: auto;
}

.ds-skeleton-card__meta-item {
    height: 12px;
    width: 60px;
    border-radius: 4px;
    background: var(--ds-skeleton-base, #E2E8F0);
    animation: ds-skeleton-pulse 1.5s ease-in-out infinite;
}

@keyframes ds-skeleton-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 骨架屏占位网格 (Grid布局) */
.ds-skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.ds-skeleton-grid .ds-skeleton-card--grid {
    margin-bottom: 0;
}

/* 移动端骨架屏 */
@media (max-width: 640px) {
    .ds-skeleton-card--list {
        flex-direction: column;
    }
    
    .ds-skeleton-card--list .ds-skeleton-card__thumb {
        width: 100%;
        height: 160px;
    }
    
    .ds-skeleton-grid {
        grid-template-columns: 1fr;
    }
}


/* ============================================
   3. 错误状态 & 重试按钮
   ============================================ */

/* 加载失败/网络错误状态 */
.ds-error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
    text-align: center;
}

.ds-error-state__icon {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    color: var(--ds-error, #EF4444);
}

.ds-error-state__icon svg {
    width: 100%;
    height: 100%;
}

.ds-error-state__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ds-text, #1E293B);
    margin-bottom: 8px;
}

.ds-error-state__desc {
    font-size: 0.875rem;
    color: var(--ds-text-muted, #64748B);
    margin-bottom: 20px;
    max-width: 300px;
}

.ds-error-state__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--ds-primary, #0EA5E9);
    color: #fff;
    border: none;
    border-radius: var(--ds-radius, 8px);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ds-error-state__btn:hover {
    background: var(--ds-primary-dark, #0284C7);
    transform: translateY(-1px);
}

.ds-error-state__btn:active {
    transform: translateY(0);
}

.ds-error-state__btn svg {
    width: 16px;
    height: 16px;
}

/* 加载完成提示 */
.ds-load-complete {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    color: var(--ds-text-muted, #64748B);
    font-size: 0.875rem;
}

.ds-load-complete__icon {
    width: 18px;
    height: 18px;
    color: #10B981;
}

.ds-load-complete__icon svg {
    width: 100%;
    height: 100%;
}


/* ============================================
   4. 快捷键帮助弹窗
   ============================================ */

/* 快捷键帮助遮罩 */
.ds-shortcut-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 99998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.ds-shortcut-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

/* 快捷键帮助弹窗主体 */
.ds-shortcut-modal {
    background: var(--ds-bg, #fff);
    border-radius: 16px;
    padding: 28px 32px;
    max-width: 480px;
    width: calc(100vw - 32px);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ds-shortcut-overlay.is-open .ds-shortcut-modal {
    transform: scale(1) translateY(0);
}

/* 弹窗标题 */
.ds-shortcut-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.ds-shortcut-modal__title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--ds-text, #1E293B);
    display: flex;
    align-items: center;
    gap: 8px;
}

.ds-shortcut-modal__title svg {
    width: 22px;
    height: 22px;
    color: var(--ds-primary, #0EA5E9);
}

.ds-shortcut-modal__close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--ds-bg-secondary, #F1F5F9);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ds-text-muted, #64748B);
    transition: all 0.2s ease;
}

.ds-shortcut-modal__close:hover {
    background: var(--ds-error, #EF4444);
    color: #fff;
}

.ds-shortcut-modal__close svg {
    width: 18px;
    height: 18px;
}

/* 快捷键分组 */
.ds-shortcut-group {
    margin-bottom: 20px;
}

.ds-shortcut-group:last-child {
    margin-bottom: 0;
}

.ds-shortcut-group__title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ds-text-muted, #64748B);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--ds-border, #E2E8F0);
}

/* 快捷键列表 */
.ds-shortcut-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ds-shortcut-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
}

.ds-shortcut-item__label {
    font-size: 0.9rem;
    color: var(--ds-text, #1E293B);
}

.ds-shortcut-item__keys {
    display: flex;
    gap: 4px;
}

/* 键盘按键样式 */
.ds-kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 26px;
    padding: 0 8px;
    background: var(--ds-bg-secondary, #F1F5F9);
    border: 1px solid var(--ds-border, #E2E8F0);
    border-bottom-width: 2px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: ui-monospace, 'SF Mono', 'Fira Code', monospace;
    color: var(--ds-text, #1E293B);
    white-space: nowrap;
}

.ds-shortcut-item__keys .ds-kbd {
    color: var(--ds-primary, #0EA5E9);
}

/* 弹窗底部提示 */
.ds-shortcut-modal__footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--ds-border, #E2E8F0);
    text-align: center;
    font-size: 0.8rem;
    color: var(--ds-text-muted, #64748B);
}

/* 激活的快捷键高亮 */
.ds-shortcut-item--active .ds-kbd {
    background: var(--ds-primary, #0EA5E9);
    color: #fff;
    border-color: var(--ds-primary, #0EA5E9);
}


/* ============================================
   5. 暗黑模式适配
   ============================================ */

[data-theme="dark"] .ds-toast--info {
    --ds-toast-info-bg: rgba(30, 41, 59, 0.95);
}

[data-theme="dark"] .ds-toast--success {
    --ds-toast-success-bg: rgba(6, 78, 59, 0.95);
}

[data-theme="dark"] .ds-toast--error {
    --ds-toast-error-bg: rgba(127, 29, 29, 0.95);
}

[data-theme="dark"] .ds-shortcut-modal {
    background: var(--ds-bg, #0F172A);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .ds-shortcut-modal__title {
    color: var(--ds-text, #F1F5F9);
}

[data-theme="dark"] .ds-shortcut-modal__close {
    background: rgba(255, 255, 255, 0.1);
    color: #94A3B8;
}

[data-theme="dark"] .ds-shortcut-modal__close:hover {
    background: var(--ds-error, #EF4444);
    color: #fff;
}

[data-theme="dark"] .ds-shortcut-group__title {
    color: #94A3B8;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .ds-shortcut-item__label {
    color: #E2E8F0;
}

[data-theme="dark"] .ds-kbd {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
    color: #E2E8F0;
}

[data-theme="dark"] .ds-shortcut-item__keys .ds-kbd {
    color: #38BDF8;
}

[data-theme="dark"] .ds-shortcut-modal__footer {
    color: #64748B;
    border-top-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .ds-error-state__title {
    color: #F1F5F9;
}

[data-theme="dark"] .ds-error-state__desc {
    color: #94A3B8;
}

[data-theme="dark"] .ds-skeleton-card {
    background: var(--ds-card-bg, #1E293B);
    border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .ds-skeleton-card__thumb,
[data-theme="dark"] .ds-skeleton-card__tag,
[data-theme="dark"] .ds-skeleton-card__title,
[data-theme="dark"] .ds-skeleton-card__excerpt,
[data-theme="dark"] .ds-skeleton-card__meta-item {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .ds-load-complete {
    color: #64748B;
}

/* ============================================
   6. 文章列表键盘导航高亮
   ============================================ */

/* 当前键盘导航项 */
.ds-post-item--keyboard-focused {
    outline: 2px solid var(--ds-primary, #0EA5E9);
    outline-offset: 2px;
}

.ds-post-item--keyboard-focused .ds-post-card {
    transform: translateX(4px);
}

/* 移动端隐藏快捷键提示 */
@media (max-width: 768px) {
    .ds-shortcut-overlay {
        display: none;
    }
}