/**
 * TuAi AI Assistant - Complete UI Stylesheet
 * ============================================
 * Structure:
 *   1. Rainbow blur layer (colorful background glow)
 *   2. Panel positioning & open/close animations
 *   3. Glass card (independent acrylic implementation)
 *   4. Header toolbar
 *   5. History sidebar
 *   6. Scrollbar styling
 *   7. Messages area
 *   8. Input area with rainbow glow border
 *   9. Empty state (floating search bar mode)
 *  10. Taskbar button toggle
 *  11. Keyframe animations
 */

/* ==========================================================
   1. Rainbow Blur Layer - Floating color band above taskbar
   ========================================================== */
/* TuAi 彩虹模糊层，在窗口上方但在任务栏下方 - Rainbow blur layer, above windows but below taskbar */
#tuai-blur-layer {
    position: fixed;
    bottom: 48px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 60px;
    z-index: 9500;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 1, 1);
    overflow: visible;
}

#tuai-blur-layer.tuai-visible {
    opacity: 1;
    transition-duration: 0.3s;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.blur-disabled #tuai-blur-layer {
    display: none;
}

#tuai-blur-layer::before {
    content: '';
    position: absolute;
    inset: -30px -40px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255, 50, 80, 0.45) 10%,
        rgba(255, 160, 30, 0.5) 25%,
        rgba(255, 240, 50, 0.4) 35%,
        rgba(50, 220, 100, 0.45) 48%,
        rgba(30, 140, 255, 0.5) 62%,
        rgba(130, 60, 255, 0.5) 78%,
        rgba(240, 50, 180, 0.4) 90%,
        transparent 100%
    );
    filter: blur(35px);
    animation: tuaiFlow1 12s ease-in-out infinite alternate;
}

#tuai-blur-layer::after {
    content: '';
    position: absolute;
    inset: -20px -30px;
    background: linear-gradient(90deg,
        transparent 5%,
        rgba(130, 60, 255, 0.3) 20%,
        rgba(30, 170, 255, 0.35) 40%,
        rgba(50, 220, 80, 0.3) 55%,
        rgba(255, 200, 50, 0.3) 70%,
        rgba(255, 80, 60, 0.35) 85%,
        transparent 95%
    );
    filter: blur(28px);
    animation: tuaiFlow2 15s ease-in-out infinite alternate-reverse;
}

/* ==========================================================
   2. Panel Positioning & Open/Close Animations
   --------------------------------------------------
   CRITICAL: #tuai-panel must NOT use `transform` for centering.
   Any non-none `transform` on a parent element breaks
   `backdrop-filter` on children — the blur can only see the
   parent's own (transparent) background instead of the real
   content behind it.  Use left:0;right:0;margin:auto instead.
   ========================================================== */
/* TuAi 面板，在任务栏上方 - TuAi panel, above taskbar */
#tuai-panel {
    position: fixed;
    bottom: 73px;
    left: 0;
    right: 0;
    width: 400px;
    max-height: 520px;
    margin: 0 auto;
    z-index: 10200;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    border: none;
    background: transparent;
    overflow: visible;
}

/* Reuse the exact card motion shared by Control Center and Notification
 * Center. Animate the glass card itself while keeping its wrapper
 * transform-free, so the backdrop blur remains synchronized. */
body.animations-enabled #tuai-panel:not(.hidden) > .tuai-content {
    animation: controlCenterOpen 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

body.animations-enabled #tuai-panel.tuai-closing > .tuai-content {
    animation: controlCenterClose 0.2s cubic-bezier(0.4, 0, 1, 1) forwards;
}

/* ==========================================================
   3. Glass Card - Acrylic / Gaussian Blur
   --------------------------------------------------
   Mirrors the notification-center approach exactly:
     background: var(--bg-secondary)   => rgba(255,255,255,0.7)
     backdrop-filter: blur(--blur-lg)  => blur(16px) saturate(150%)
   The parent #tuai-panel has NO transform, so
   backdrop-filter can see through to the real wallpaper.
   ========================================================== */
.tuai-content {
    --tuai-glass-radius: 16px;

    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    max-height: 520px;
    padding: 0;

    /* Identical to notification-center: */
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(150%);

    border-radius: var(--tuai-glass-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    opacity: 1;
    transform-origin: bottom center;
    transition:
        background 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        border-color 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        padding 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        backdrop-filter 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        -webkit-backdrop-filter 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.32s cubic-bezier(0.22, 1, 0.36, 1);
    overflow: hidden;
}

.tuai-content.tuai-expanding {
    animation: tuaiCardExpand 0.52s cubic-bezier(0.22, 1, 0.36, 1);
}

.tuai-content.tuai-collapsing {
    animation: tuaiCardCollapse 0.36s cubic-bezier(0.55, 0, 0.8, 0.2);
}

.blur-disabled .tuai-content {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.95);
}

.dark-mode.blur-disabled .tuai-content {
    background: rgba(32, 32, 32, 0.92);
}

/* Subtle inner highlight along the top edge */
.tuai-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8px;
    right: 8px;
    height: 1px;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.5) 30%,
        rgba(255, 255, 255, 0.7) 50%,
        rgba(255, 255, 255, 0.5) 70%,
        transparent
    );
    z-index: 2;
    pointer-events: none;
    border-radius: var(--tuai-glass-radius) var(--tuai-glass-radius) 0 0;
}

.dark-mode .tuai-content::before {
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.08) 30%,
        rgba(255, 255, 255, 0.12) 50%,
        rgba(255, 255, 255, 0.08) 70%,
        transparent
    );
}

/* ==========================================================
   4. Empty State - Collapse card, show only floating input
   ========================================================== */
.tuai-content.tuai-empty {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    backdrop-filter: blur(0) saturate(100%);
    -webkit-backdrop-filter: blur(0) saturate(100%);
    overflow: visible;
}

.tuai-content.tuai-empty::before {
    display: none;
}

.tuai-content.tuai-empty .tuai-header,
.tuai-content.tuai-empty .tuai-history,
.tuai-content.tuai-empty #tuai-messages {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    padding-top: 0;
    padding-bottom: 0;
    margin: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
        opacity 0.26s cubic-bezier(0.4, 0, 1, 1),
        max-height 0.42s cubic-bezier(0.55, 0, 0.8, 0.2),
        padding 0.34s cubic-bezier(0.55, 0, 0.8, 0.2),
        margin 0.34s cubic-bezier(0.55, 0, 0.8, 0.2),
        transform 0.34s cubic-bezier(0.55, 0, 0.8, 0.2);
}

.tuai-content:not(.tuai-empty) .tuai-header,
.tuai-content:not(.tuai-empty) #tuai-messages {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.44s cubic-bezier(0.22, 1, 0.36, 1) 0.04s,
        max-height 0.5s cubic-bezier(0.22, 1, 0.36, 1),
        padding 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        margin 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.5s cubic-bezier(0.2, 0.9, 0.25, 1.08);
}

/* Floating bob animation when empty */
.tuai-content.tuai-empty .tuai-input-wrap {
    animation: tuaiBob 3.5s ease-in-out infinite;
}

/* ==========================================================
   5. Header Toolbar
   ========================================================== */
.tuai-header {
    padding: 12px 18px 6px;
    display: flex;
    align-items: center;
    flex-shrink: 0;
    max-height: 64px;
    overflow: hidden;
}

.tuai-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.tuai-header-left img {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.tuai-header-left span {
    font-size: 13px;
    font-weight: 600;
    color: #1a1a1a;
}

.dark-mode .tuai-header-left span {
    color: #e8e8e8;
}

.tuai-toolbar {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.tuai-toolbar button {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: opacity 0.2s ease, background 0.2s ease;
    padding: 0;
}

.tuai-toolbar button:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.06);
}

.dark-mode .tuai-toolbar button:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tuai-toolbar button:active {
    opacity: 0.8;
    transform: scale(0.92);
}

.tuai-toolbar button img {
    width: 15px;
    height: 15px;
}

/* ==========================================================
   6. History Sidebar
   ========================================================== */
.tuai-history {
    display: block;
    max-height: 0;
    opacity: 0;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 0 18px;
    border-bottom: 1px solid transparent;
    pointer-events: none;
    transform: translateY(-8px);
    transform-origin: top center;
    transition:
        max-height 0.48s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.3s cubic-bezier(0.33, 1, 0.68, 1),
        padding 0.44s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.48s cubic-bezier(0.2, 0.9, 0.25, 1.08),
        border-color 0.24s ease;
}

.tuai-history::-webkit-scrollbar {
    display: none;
}

.tuai-history.show {
    max-height: 200px;
    opacity: 1;
    padding: 4px 18px 8px;
    pointer-events: auto;
    transform: translateY(0);
    border-bottom-color: rgba(0, 0, 0, 0.06);
}

.dark-mode .tuai-history.show {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.tuai-history-item {
    padding: 7px 10px;
    border-radius: 8px;
    font-size: 12px;
    color: #555;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background 0.15s ease;
}

.tuai-history-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

.dark-mode .tuai-history-item {
    color: #bbb;
}

.dark-mode .tuai-history-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.tuai-history-empty {
    font-size: 12px;
    color: #999;
    padding: 10px;
    text-align: center;
}

/* ==========================================================
   7. Scrollbar Styling (messages & history)
   ========================================================== */
#tuai-messages,
.tuai-history {
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
}

#tuai-messages:hover,
.tuai-history:hover {
    scrollbar-color: rgba(0, 0, 0, 0.15) transparent;
}

.dark-mode #tuai-messages:hover,
.dark-mode .tuai-history:hover {
    scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}

#tuai-messages::-webkit-scrollbar,
.tuai-history::-webkit-scrollbar {
    width: 4px;
}

#tuai-messages::-webkit-scrollbar-track,
.tuai-history::-webkit-scrollbar-track {
    background: transparent;
}

#tuai-messages::-webkit-scrollbar-thumb,
.tuai-history::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 4px;
    transition: background 0.2s ease;
}

#tuai-messages:hover::-webkit-scrollbar-thumb,
.tuai-history:hover::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
}

.dark-mode #tuai-messages:hover::-webkit-scrollbar-thumb,
.dark-mode .tuai-history:hover::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
}

/* ==========================================================
   8. Messages Area
   ========================================================== */
#tuai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 8px 18px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    min-height: 40px;
}

.tuai-msg {
    padding: 9px 14px;
    border-radius: 14px;
    font-size: 13px;
    line-height: 1.55;
    max-width: 85%;
    word-wrap: break-word;
    animation: tuaiMsgIn 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.tuai-msg-user {
    align-self: flex-end;
    background: var(--accent-color, #0078d4);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.tuai-msg-bot {
    align-self: flex-start;
    background: rgba(0, 0, 0, 0.055);
    color: #1a1a1a;
    border-bottom-left-radius: 4px;
}

.dark-mode .tuai-msg-bot {
    background: rgba(255, 255, 255, 0.09);
    color: #e4e4e4;
}

.tuai-msg-text {
    word-break: break-word;
}

.tuai-msg-copyable {
    position: relative;
    padding-right: 40px;
}

.tuai-copy-btn {
    position: absolute;
    right: 8px;
    bottom: 6px;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 6px;
    background: transparent;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.16s ease, transform 0.16s ease, background 0.16s ease;
}

.tuai-copy-btn img {
    width: 14px;
    height: 14px;
    display: block;
    pointer-events: none;
}

.tuai-msg-copyable:hover .tuai-copy-btn,
.tuai-copy-btn:focus-visible,
.tuai-copy-btn.copied,
.tuai-copy-btn.copy-failed {
    opacity: 1;
    transform: scale(1);
}

.tuai-copy-btn:hover {
    background: rgba(0, 0, 0, 0.08);
}

.dark-mode .tuai-copy-btn:hover {
    background: rgba(255, 255, 255, 0.14);
}

.tuai-copy-btn:focus-visible {
    outline: 1px solid rgba(0, 120, 212, 0.55);
    outline-offset: 1px;
}

.tuai-copy-btn.copied {
    animation: tuaiCopyTap 0.22s ease;
}

.tuai-copy-btn.copy-failed {
    animation: tuaiCopyShake 0.22s ease;
}

/* ==========================================================
   9. Input Area with Rainbow Glow Border
   ========================================================== */
.tuai-input-wrap {
    padding: 10px 14px 14px;
    position: relative;
    flex-shrink: 0;
}

.tuai-input-glow {
    position: relative;
    border-radius: 14px;
    padding: 2px;
    /* Animated rainbow gradient border */
    background: linear-gradient(90deg,
        rgba(255, 50, 80, 0.35),
        rgba(255, 160, 30, 0.35),
        rgba(255, 240, 50, 0.25),
        rgba(50, 220, 100, 0.25),
        rgba(30, 140, 255, 0.35),
        rgba(130, 60, 255, 0.3),
        rgba(240, 50, 180, 0.25),
        rgba(255, 50, 80, 0.35)
    );
    background-size: 200% 100%;
    animation: tuaiGlowSlide 8s linear infinite;
    transition: box-shadow 0.3s ease;
}

.tuai-input-glow:focus-within {
    box-shadow:
        0 0 16px rgba(130, 60, 255, 0.25),
        0 0 36px rgba(30, 170, 255, 0.12);
}

#tuai-input {
    width: 100%;
    padding: 10px 16px;
    border: none;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.04);
    font-size: 14px;
    color: #1a1a1a;
    outline: none;
    box-sizing: border-box;
    transition: background 0.2s ease;
}

#tuai-input::placeholder {
    color: #999;
}

.dark-mode #tuai-input {
    background: rgba(255, 255, 255, 0.08);
    color: #e4e4e4;
}

.dark-mode #tuai-input::placeholder {
    color: #777;
}

/* ==========================================================
   10. Empty State - Floating Acrylic Search Bar
   --------------------------------------------------
   Same approach: use system CSS vars for glass effect.
   ========================================================== */
.tuai-content.tuai-empty .tuai-input-glow {
    /* Override: standalone acrylic glass card — same as notification-center */
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(150%);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    border-radius: var(--tuai-glass-radius, 16px);
    padding: 0;
    animation: none; /* disable gradient slide */
}

/* Rainbow glow ring behind the floating input */
.tuai-content.tuai-empty .tuai-input-glow::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: calc(var(--tuai-glass-radius, 16px) + 3px);
    background: linear-gradient(90deg,
        rgba(255, 50, 80, 0.35),
        rgba(255, 160, 30, 0.35),
        rgba(255, 240, 50, 0.25),
        rgba(50, 220, 100, 0.25),
        rgba(30, 140, 255, 0.35),
        rgba(130, 60, 255, 0.3),
        rgba(240, 50, 180, 0.25),
        rgba(255, 50, 80, 0.35)
    );
    background-size: 200% 100%;
    animation: tuaiGlowSlide 8s linear infinite;
    z-index: -1;
    pointer-events: none;
}

.tuai-content.tuai-empty #tuai-input {
    background: transparent !important;
    border-radius: calc(var(--tuai-glass-radius, 16px) - 1px);
}

.blur-disabled .tuai-content.tuai-empty .tuai-input-glow {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.95);
}

.dark-mode.blur-disabled .tuai-content.tuai-empty .tuai-input-glow {
    background: rgba(32, 32, 32, 0.92);
}

/* ==========================================================
   11. Taskbar Button Icon Toggle
   TuAi 按钮固定使用描边版：填充版 img 已从 index.php 移除。
   原先 ".active 隐藏 stroke / 显示 fill" 的切换一并删除——
   若保留 .active .icon-stroke { display:none }，激活时图标会整个消失。
   ========================================================== */
#tuai-btn .icon-stroke {
    display: inline;
}

/* ==========================================================
   12. Keyframe Animations
   ========================================================== */

/* Rainbow blur layer flow */
@keyframes tuaiFlow1 {
    0%   { transform: translateX(-25px); filter: blur(35px) hue-rotate(0deg); }
    33%  { transform: translateX(15px);  filter: blur(38px) hue-rotate(40deg); }
    66%  { transform: translateX(-10px); filter: blur(32px) hue-rotate(-30deg); }
    100% { transform: translateX(25px);  filter: blur(36px) hue-rotate(60deg); }
}

@keyframes tuaiFlow2 {
    0%   { transform: translateX(20px);  filter: blur(28px) hue-rotate(0deg); }
    50%  { transform: translateX(-20px); filter: blur(30px) hue-rotate(-50deg); }
    100% { transform: translateX(15px);  filter: blur(26px) hue-rotate(45deg); }
}

/* Rainbow border slide */
@keyframes tuaiGlowSlide {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Card unfold/fold for first-message and reset transitions */
@keyframes tuaiCardExpand {
    0% {
        opacity: 0.82;
        box-shadow: 0 10px 22px rgba(0, 0, 0, 0.12);
    }
    65% {
        opacity: 1;
        box-shadow: 0 20px 44px rgba(0, 0, 0, 0.2);
    }
    100% {
        opacity: 1;
        box-shadow: var(--shadow-xl);
    }
}

@keyframes tuaiCardCollapse {
    0% {
        opacity: 1;
        box-shadow: var(--shadow-xl);
    }
    100% {
        opacity: 0.88;
        box-shadow: 0 10px 22px rgba(0, 0, 0, 0.12);
    }
}

/* Message entrance */
@keyframes tuaiMsgIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes tuaiCopyTap {
    0% {
        transform: scale(0.86);
    }
    70% {
        transform: scale(1.08);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes tuaiCopyShake {
    0% {
        transform: translateX(0);
    }
    30% {
        transform: translateX(-2px);
    }
    70% {
        transform: translateX(2px);
    }
    100% {
        transform: translateX(0);
    }
}

/* Floating bob for empty state */
@keyframes tuaiBob {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}