:root {
    --accent-color: #ff8888;
    --accent-strong: color-mix(in srgb, var(--accent-color) 85%, white 15%);
    --accent-soft: color-mix(in srgb, var(--accent-color) 40%, white 10%);
    --accent-glow: color-mix(in srgb, var(--accent-color) 35%, transparent);
    --bg-color: #050505;
    --bg-dark-overlay: rgba(0, 0, 0, 0.55);
    --sidebar-bg: rgba(0, 0, 0, 0.25);
    --input-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.14);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.65);
    --code-bg: rgba(0, 0, 0, 0.3);
    --user-msg-bg: rgba(255, 255, 255, 0.06);
    --user-bubble-bg: color-mix(in srgb, var(--accent-color) 65%, white 25%);
    --user-bubble-text: #1b1b1b;
    --border-color: var(--glass-border);
    --radius-ui: 24px;
    --radius-sm: 12px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

body {
    font-family: "Noto Sans TC", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: transparent;
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    animation: fadeIn 1s ease-out;
}

.app-container {
    display: flex;
    height: 100%;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    display: flex;
    flex-direction: column;
    padding: 10px;
    border-right: 1px solid var(--glass-border);
    box-shadow: 5px 0 25px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.03);
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.new-chat-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-soft);
    box-shadow: 0 4px 12px var(--accent-glow);
    transform: translateY(-1px);
}

.new-chat-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    margin-top: 20px;
}

.history-label {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 8px 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.history-item {
    padding: 10px 12px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.history-item:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.history-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.message-action-btn:disabled {
    cursor: not-allowed;
    pointer-events: none;
}

.history-item.active {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--glass-border);
    color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.history-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.delete-conv-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.delete-conv-btn:hover {
    color: var(--accent-strong);
    background: rgba(255, 255, 255, 0.08);
}

.history-empty {
    padding: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    font-style: italic;
}

.sidebar-footer {
    padding-top: 10px;
    border-top: 1px solid var(--glass-border);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s ease;
}

.user-profile:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.auth-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    margin-top: 8px;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.3s ease-out;
}

.auth-input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    padding: 10px 12px;
    font-size: 13px;
    transition: all 0.2s ease;
}

.auth-input:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--accent-color) 40%, white 20%);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 10px var(--accent-glow);
}

.auth-actions {
    display: flex;
    gap: 8px;
}

.primary-btn,
.ghost-btn {
    flex: 1;
    padding: 10px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.primary-btn {
    border: none;
    background: var(--accent-strong);
    color: #1a1a1a;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--accent-color) 20%, transparent);
}

.primary-btn:hover {
    background: color-mix(in srgb, var(--accent-color) 92%, white 8%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.ghost-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.ghost-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.primary-btn:disabled,
.ghost-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.auth-hint {
    font-size: 12px;
    color: var(--text-secondary);
    min-height: 16px;
    text-align: center;
}

.avatar {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--accent-color), color-mix(in srgb, var(--accent-color) 60%, transparent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    color: #1a1a1a;
    box-shadow: 0 2px 6px var(--accent-glow);
}

.username {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-strong);
}

.chat-interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: transparent;
}

.mobile-header {
    display: none;
    padding: 10px;
    border-bottom: 1px solid var(--glass-border);
    font-weight: 500;
    align-items: center;
    gap: 10px;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background-color: var(--sidebar-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    z-index: 120;
}

.mobile-header button {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 8px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px 0;
    scroll-behavior: smooth;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
    background: transparent;
}

::-webkit-scrollbar-track {
    background: transparent !important;
    background-color: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: background-color 0.25s ease, transform 0.25s ease;
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: scaleX(1.15);
}

.message-wrapper {
    width: 100%;
    padding: 24px 0;
    line-height: 1.7;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    animation: slideInUp 0.4s ease-out backwards;
}

.message-wrapper:nth-child(even) {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.02) 20%, rgba(255, 255, 255, 0.02) 80%, transparent);
}

.message-content {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    gap: 20px;
}

.message-footer {
    max-width: 768px;
    margin: 8px auto 0;
    padding: 0 24px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
}

.message-action-btn {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 12px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s ease, color 0.2s ease, background-color 0.2s ease;
    opacity: 0;
}

.message-wrapper:hover .message-action-btn,
.message-wrapper:focus-within .message-action-btn,
.message-action-btn:focus-visible {
    opacity: 1;
}

.message-wrapper:hover .message-action-btn:disabled,
.message-wrapper:focus-within .message-action-btn:disabled,
.message-action-btn:disabled:focus-visible {
    opacity: 0.5;
}

.message-action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.edit-message-btn svg {
    width: 20px;
    height: 20px;
}

.copy-message-btn {
    position: relative;
}

.copy-message-btn.copy-error {
    color: #ef4444;
}

.message-action-inner {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.copy-button-inner svg {
    width: 20px;
    height: 20px;
}

.copy-button-inner .copy-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s ease, transform 0.2s ease;
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
}

.copy-message-btn:not(.copy-success) .copy-icon-default {
    opacity: 1;
    transform: scale(1);
}

.copy-message-btn.copy-success .copy-icon-success {
    opacity: 1;
    transform: scale(1);
}

.role-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.icon-user {
    background: var(--text-secondary);
    color: #000;
}

.icon-model {
    background: var(--accent-strong);
    color: #1a1a1a;
    box-shadow: 0 0 10px var(--accent-glow);
}

.text-content {
    flex: 1;
    min-width: 0;
    word-wrap: break-word;
    color: var(--text-secondary);
}

.message-wrapper[data-role="user"] .message-content {
    justify-content: flex-end;
    align-items: flex-start;
}

.message-wrapper[data-role="user"] .text-content {
    flex: 0 1 auto;
    margin-left: auto;
    background: var(--accent-strong);
    color: var(--user-bubble-text);
    padding: 14px 22px;
    border-radius: 999px;
    max-width: min(75%, 480px);
    box-shadow: 0 8px 24px color-mix(in srgb, var(--accent-color) 40%, transparent);
    border: 1px solid rgba(255, 255, 255, 0.14);
    font-weight: 600;
    line-height: 1.6;
}

.message-wrapper[data-role="user"] .text-content p {
    margin: 0;
    color: inherit;
}

.message-wrapper[data-role="user"] .message-footer {
    justify-content: flex-end;
}

.text-content p {
    margin-bottom: 1rem;
}

.text-content p:last-child {
    margin-bottom: 0;
}

.text-content h1,
.text-content h2,
.text-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--accent-strong);
    text-shadow: 0 0 15px var(--accent-glow);
}

.text-content ul,
.text-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.text-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.code-container {
    margin: 16px 0;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.2);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--glass-border);
    font-size: 12px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
}

.copy-button {
    background: transparent;
    border: none;
    color: var(--accent-soft);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    transition: color 0.2s;
}

.copy-button:hover {
    color: var(--accent-strong);
}

pre {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 14px;
    color: #d4d4d4;
}

p code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 0.9em;
    color: var(--accent-strong);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.input-container {
    position: relative;
    padding: 24px;
    width: 100%;
    z-index: 0;
    overflow: hidden;
}

.input-container::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: url('/static/images/background.png');
    background-size: cover;
    background-position: center;
    filter: brightness(60%) grayscale(18%) blur(2px);
    -webkit-mask-image: linear-gradient(180deg, transparent, black 40%);
    mask-image: linear-gradient(180deg, transparent, black 40%);
}

.input-wrapper {
    max-width: 768px;
    margin: 0 auto;
    background-color: var(--input-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: 26px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    border: 1px solid var(--glass-highlight);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.2),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.input-main {
    display: flex;
    align-items: flex-end;
    gap: 12px;
}

.input-wrapper:focus-within {
    border-color: color-mix(in srgb, var(--accent-color) 30%, white 20%);
    box-shadow:
        0 8px 30px rgba(0, 0, 0, 0.3),
        0 0 15px var(--accent-glow);
    background-color: rgba(255, 255, 255, 0.08);
}

.prompt-tools-block {
    width: 100%;
    padding-top: 8px;
    border-top: 1px solid var(--glass-border);
}

.prompt-tools-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    min-height: 32px;
}

.tool-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 14px;
    cursor: pointer;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    transition: all 0.2s ease;
}

.tool-pill:hover {
    color: var(--text-primary);
    border-color: color-mix(in srgb, var(--accent-color) 40%, white 10%);
    background: rgba(255, 255, 255, 0.08);
}

.tool-pill.active {
    border-color: color-mix(in srgb, var(--accent-color) 55%, white 10%);
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    box-shadow: 0 0 12px var(--accent-glow);
}

.tool-pill-icon,
.tool-pill-remove {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
}

.tool-pill-remove {
    opacity: 0;
    transition: opacity 0.2s ease;
}

.tool-pill.active .tool-pill-remove {
    opacity: 1;
}

.tool-pill-remove svg,
.tool-pill-icon svg {
    width: 16px;
    height: 16px;
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    max-height: 200px;
    padding: 4px 0;
    font-family: inherit;
    line-height: 1.5;
}

textarea:focus {
    outline: none;
}

textarea::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

button#send-button {
    background: var(--accent-strong);
    color: #1a1a1a;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    flex-shrink: 0;
    box-shadow: 0 2px 10px var(--accent-glow);
}

button#send-button:hover:not(:disabled) {
    transform: scale(1.1);
    background: #fff;
}

button#send-button:disabled {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.2);
    cursor: default;
    box-shadow: none;
}

button#send-button svg {
    width: 16px;
    height: 16px;
}

.disclaimer {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
    opacity: 0.6;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 10px 0;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-strong);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
    box-shadow: 0 0 5px var(--accent-glow);
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-4px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(4px);
    }
}

.shake {
    animation: shake 0.4s cubic-bezier(.36, .07, .19, .97) both;
    border-color: #ff4444 !important;
}

.mobile-backdrop {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: 85%;
        max-width: 320px;
        display: none;
        z-index: 200;
        background-color: var(--sidebar-bg);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        box-shadow: 10px 0 40px rgba(0, 0, 0, 0.5);
        border-right: 1px solid var(--glass-border);
    }

    .mobile-header {
        display: flex;
    }

    .message-content,
    .message-footer,
    .input-wrapper {
        padding: 0 16px;
    }

    .input-wrapper {
        padding: 9px 16px;
        min-height: 36px;
    }

    .prompt-tools-block {
        padding: 8px 0 0;
    }

    body.sidebar-open .sidebar {
        display: flex;
        animation: fadeIn 0.2s ease-out;
    }

    .mobile-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        background: transparent;
        backdrop-filter: none;
        z-index: 150;
    }

    body.sidebar-open .mobile-backdrop {
        display: block;
        animation: fadeIn 0.3s ease;
    }
}

.full-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(60%) grayscale(18%) blur(2px);
    transform: scale(1.03);
}

.full-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--accent-color) 8%, transparent), transparent 40%),
        var(--bg-dark-overlay);
    z-index: -1;
}

.full-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    overflow: hidden;
}

.full-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(60%) grayscale(18%) blur(2px);
    transform: scale(1.03);
}

.full-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--accent-color) 8%, transparent), transparent 40%),
        var(--bg-dark-overlay);
    z-index: -1;
}