/* ══════════════════════════════════════════════════════════════
   common.css — 跨页面共享样式（Toast / Confirm / 骨架屏 / 可访问性）
   被 index.php / user.php / admin_api.php 共同引用
   ══════════════════════════════════════════════════════════════ */

/* === Toast 通知系统 === */
.toast-container {
    position: fixed; top: 20px; right: 20px; z-index: 9999;
    display: flex; flex-direction: column; gap: 8px;
    pointer-events: none;
}
.toast {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 18px; border-radius: 10px;
    font-size: 13px; font-weight: 600;
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    animation: toastIn 0.3s cubic-bezier(0.16,1,0.3,1);
    pointer-events: auto;
    min-width: 240px; max-width: 380px;
}
.toast.success { background: rgba(63,185,80,0.15); border: 1px solid rgba(63,185,80,0.3); color: #3fb950; }
.toast.error   { background: rgba(248,81,73,0.15); border: 1px solid rgba(248,81,73,0.3); color: #f85149; }
.toast.warning { background: rgba(210,153,34,0.15); border: 1px solid rgba(210,153,34,0.3); color: #d29922; }
.toast.info    { background: rgba(88,166,255,0.15); border: 1px solid rgba(88,166,255,0.3); color: #58a6ff; }
.toast.fadeout { animation: toastOut 0.3s ease forwards; }
.toast i { font-size: 16px; flex-shrink: 0; }
@keyframes toastIn  { from { opacity:0; transform: translateX(40px); } to { opacity:1; transform: translateX(0); } }
@keyframes toastOut { to { opacity:0; transform: translateX(40px); } }

/* === 确认弹窗 === */
.confirm-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: none; align-items: center; justify-content: center;
    z-index: 4000;
}
.confirm-overlay.show { display: flex; animation: confirmFadeIn 0.2s ease; }
@keyframes confirmFadeIn { from { opacity:0; } to { opacity:1; } }
.confirm-box {
    background: #111; border: 1px solid #404040;
    border-radius: 14px; padding: 24px;
    width: 90%; max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    animation: confirmIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes confirmIn { from { opacity:0; transform: scale(0.9) translateY(10px); } to { opacity:1; transform: scale(1) translateY(0); } }
.confirm-box .confirm-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: rgba(248,81,73,0.12); color: #f85149;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; margin-bottom: 16px;
}
.confirm-box .confirm-title { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: #f0f0f0; }
.confirm-box .confirm-msg { font-size: 13px; color: #999; line-height: 1.6; margin-bottom: 20px; }
.confirm-box .confirm-actions { display: flex; gap: 8px; justify-content: flex-end; }
.confirm-box .confirm-btn {
    padding: 8px 20px; border-radius: 8px; font-size: 13px; font-weight: 600;
    cursor: pointer; border: 1px solid #222; transition: all 0.2s; font-family: inherit;
}
.confirm-box .confirm-btn.cancel { background: #1c1c1c; color: #999; }
.confirm-box .confirm-btn.cancel:hover { background: #222; color: #f0f0f0; }
.confirm-box .confirm-btn.danger { background: #f85149; color: #fff; border-color: #f85149; }
.confirm-box .confirm-btn.danger:hover { background: #da3633; }

/* === 骨架屏 === */
.skeleton-card {
    background: #111; border: 1px solid #222; border-radius: 14px; padding: 16px;
    position: relative; overflow: hidden;
}
.skeleton-card::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
    animation: shimmer 1.5s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }
.skeleton-line { height: 12px; border-radius: 4px; background: #222; margin-bottom: 8px; }
.skeleton-line.w-60 { width: 60%; }
.skeleton-line.w-40 { width: 40%; }
.skeleton-line.w-80 { width: 80%; }

/* === 空状态 === */
.empty-state { text-align: center; padding: 60px 20px; color: #555; }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: 0.3; }
.empty-state .empty-title { font-size: 15px; font-weight: 600; color: #999; margin-bottom: 6px; }
.empty-state .empty-desc { font-size: 12px; }

/* === 可访问性：减弱动画 + 键盘焦点 === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
*:focus-visible {
    outline: 2px solid rgba(88,166,255,0.5);
    outline-offset: 2px;
    border-radius: 4px;
}
*:focus:not(:focus-visible) { outline: none; }

/* === Skip to content === */
.skip-link {
    position: absolute; top: -40px; left: 0;
    background: #58a6ff; color: #fff;
    padding: 8px 16px; border-radius: 0 0 8px 0;
    font-size: 13px; font-weight: 600; text-decoration: none;
    z-index: 10000; transition: top 0.2s;
}
.skip-link:focus { top: 0; }