/**
 * TalkStock V2 - 主樣式檔
 * 包含響應式設計、深色主題、動畫效果
 */

/* ==========================================================================
   CSS 變數定義
   ========================================================================== */
:root {
    /* 色彩系統 - 明亮橘綠主題 */
    --color-bg-primary: #fffbf5;        /* 暖米白底 - 清爽明亮 */
    --color-bg-secondary: #ffffff;      /* 純白卡片 */
    --color-bg-tertiary: #fff4e6;       /* 淺橘背景 */
    --color-bg-hover: #ffedd5;          /* 淡橘 hover */

    --color-text-primary: #292524;      /* 深棕文字 */
    --color-text-secondary: #78716c;    /* 暖灰文字 */
    --color-text-muted: #a8a29e;        /* 淡灰文字 */

    --color-accent: #f97316;            /* 活力橘主色 */
    --color-accent-hover: #ea580c;      /* 深橘 hover */
    --color-accent-light: rgba(249, 115, 22, 0.1);  /* 淡橘透明 */

    --color-success: #10b981;           /* 翠綠 */
    --color-danger: #ef4444;            /* 珊瑚紅 */
    --color-warning: #f59e0b;           /* 琥珀橙 */

    /* 間距系統 - 優化呼吸感 */
    --spacing-xs: 6px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;

    /* 圓角 - 更柔和 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* 陰影 - 輕盈優雅 */
    --shadow-sm: 0 1px 3px rgba(249, 115, 22, 0.06);
    --shadow-md: 0 4px 12px rgba(249, 115, 22, 0.1);
    --shadow-lg: 0 12px 32px rgba(249, 115, 22, 0.12);
    --shadow-border: 0 0 0 1px rgba(249, 115, 22, 0.08);

    /* 字體 */
    --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 13px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;

    /* 側邊欄 */
    --sidebar-width: 80px;              /* 增加寬度提升舒適度 */
    --sidebar-expanded: 240px;

    /* 底部導航 */
    --bottom-nav-height: 64px;

    /* 內容最大寬度 - 桌面版優化 */
    --content-max-width: 1400px;
    --chat-max-width: 900px;

    /* 過渡 */
    --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 450ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   基礎重置
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-primary);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(249, 115, 22, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 50%);
    color: var(--color-text-primary);
    line-height: 1.6;
    letter-spacing: 0.01em;
    overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.01em;
}

p {
    line-height: 1.7;
}

button, input, textarea, select {
    letter-spacing: 0.01em;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

/* ==========================================================================
   應用容器
   ========================================================================== */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ==========================================================================
   桌面版側邊欄
   ========================================================================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #ffffff 0%, #fdfcff 100%);
    border-right: 1px solid rgba(249, 115, 22, 0.08);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 100;
}

.sidebar-header {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid rgba(249, 115, 22, 0.06);
}

.logo {
    color: var(--color-accent);
    filter: drop-shadow(0 2px 8px rgba(249, 115, 22, 0.3));
    animation: logoGlow 4s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% {
        filter: drop-shadow(0 2px 8px rgba(249, 115, 22, 0.3));
    }
    50% {
        filter: drop-shadow(0 2px 12px rgba(249, 115, 22, 0.5));
    }
}

.sidebar-tabs {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg) 0;
    gap: var(--spacing-sm);
}

.tab-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    margin: 0 var(--spacing-md);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
    position: relative;
}

.tab-btn::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 0;
    background: var(--color-accent);
    border-radius: 0 4px 4px 0;
    transition: height var(--transition-normal);
}

.tab-btn:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
    transform: translateX(2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.15) 0%, rgba(249, 115, 22, 0.08) 100%);
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.tab-btn.active::before {
    height: 32px;
}

.tab-icon {
    width: 24px;
    height: 24px;
    margin-bottom: var(--spacing-xs);
}

.tab-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(249, 115, 22, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.settings-btn, .lang-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.settings-btn:hover, .lang-btn:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

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

.lang-code {
    font-size: var(--font-size-xs);
    font-weight: 700;
}

/* ==========================================================================
   主內容區域
   ========================================================================== */
.main-content {
    flex: 1;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background-color: var(--color-bg-primary);
}

.panel {
    display: none;
    height: 100%;
    flex-direction: column;
    overflow: hidden;
}

.panel.active {
    display: flex;
}

.panel-header {
    height: 80px;
    padding: 0 var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(249, 115, 22, 0.06);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.panel-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-2xl);
    right: var(--spacing-2xl);
    height: 2px;
    background: linear-gradient(90deg,
        var(--color-accent) 0%,
        transparent 100%
    );
    opacity: 0.3;
}

.panel-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.icon-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, var(--color-accent-light) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.icon-btn:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
    transform: scale(1.05);
}

.icon-btn:hover::before {
    opacity: 1;
}

.icon-btn:active {
    transform: scale(0.95);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
    position: relative;
    z-index: 1;
}

.icon-btn.small {
    width: 32px;
    height: 32px;
}

.icon-btn.small svg {
    width: 16px;
    height: 16px;
}

/* ==========================================================================
   聊天面板
   ========================================================================== */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-width: var(--chat-max-width);
    margin: 0 auto;
    width: 100%;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl) var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.message {
    display: flex;
    gap: var(--spacing-md);
    max-width: 80%;
    animation: fadeIn var(--transition-normal);
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, #fff4e6 0%, #ffedd5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.message-avatar svg {
    width: 22px;
    height: 22px;
    color: var(--color-accent);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
}

.message.user .message-avatar svg {
    color: white;
}

.message-content {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    border-top-left-radius: var(--radius-sm);
    box-shadow:
        0 2px 8px rgba(249, 115, 22, 0.06),
        0 0 0 1px rgba(249, 115, 22, 0.04);
    border: 1px solid rgba(249, 115, 22, 0.04);
    position: relative;
    backdrop-filter: blur(10px);
}

.message-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(249, 115, 22, 0.1) 50%, transparent 100%);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-top-left-radius: var(--radius-xl);
    border-top-right-radius: var(--radius-sm);
    color: white;
    border: none;
    box-shadow:
        0 4px 12px rgba(249, 115, 22, 0.25),
        0 0 0 1px rgba(249, 115, 22, 0.1);
}

.message.user .message-content::before {
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.2) 50%, transparent 100%);
}

.message-content p {
    margin-bottom: var(--spacing-sm);
}

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

/* 快捷提示按鈕 */
.quick-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.quick-prompt {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
    border: 1px solid rgba(249, 115, 22, 0.06);
    box-shadow: 0 1px 3px rgba(249, 115, 22, 0.04);
}

.quick-prompt:hover {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.08) 0%, rgba(249, 115, 22, 0.12) 100%);
    color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(249, 115, 22, 0.12);
    border-color: var(--color-accent);
}

.quick-prompt:active {
    transform: translateY(0);
}

/* 輸入區域 */
.chat-input-container {
    padding: var(--spacing-lg) var(--spacing-2xl);
    background-color: var(--color-bg-secondary);
    border-top: 1px solid rgba(249, 115, 22, 0.06);
    box-shadow: 0 -2px 12px rgba(249, 115, 22, 0.04);
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    border: 1px solid rgba(249, 115, 22, 0.08);
    transition: all var(--transition-normal);
}

.chat-input-wrapper:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.chat-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--color-text-primary);
    padding: var(--spacing-sm);
    resize: none;
    max-height: 120px;
    line-height: 1.5;
}

.chat-input:focus {
    outline: none;
}

.chat-input::placeholder {
    color: var(--color-text-muted);
}

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-btn:active {
    transform: translateY(0) scale(0.98);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

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

.input-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
    text-align: center;
}

/* 打字機效果 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--spacing-sm);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background-color: var(--color-text-muted);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-8px);
    }
}

/* ==========================================================================
   報價面板
   ========================================================================== */
.quote-container {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.stock-list {
    width: 320px;
    background-color: var(--color-bg-secondary);
    border-right: 1px solid rgba(249, 115, 22, 0.06);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.stock-list-header {
    padding: var(--spacing-lg) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(249, 115, 22, 0.06);
    background-color: var(--color-bg-tertiary);
}

.stock-items {
    flex: 1;
    overflow-y: auto;
}

.stock-item {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border-bottom: 1px solid rgba(249, 115, 22, 0.04);
    position: relative;
}

.stock-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
    transition: width var(--transition-normal);
}

.stock-item:hover {
    background-color: var(--color-bg-hover);
}

.stock-item:hover::before {
    width: 4px;
}

.stock-item.active {
    background: linear-gradient(90deg, rgba(249, 115, 22, 0.08) 0%, rgba(249, 115, 22, 0.02) 100%);
}

.stock-item.active::before {
    width: 4px;
}

.stock-item-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stock-item-code {
    font-weight: 700;
    font-size: var(--font-size-md);
    letter-spacing: 0.5px;
}

.stock-item-name {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.stock-item-price {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-end;
}

.stock-item-current {
    font-weight: 700;
    font-size: var(--font-size-md);
    font-variant-numeric: tabular-nums;
}

.stock-item-change {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.stock-item-change.up {
    color: var(--color-danger);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08) 0%, rgba(239, 68, 68, 0.12) 100%);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.stock-item-change.down {
    color: var(--color-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(16, 185, 129, 0.12) 100%);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* 骨架屏 */
.skeleton {
    pointer-events: none;
}

.skeleton-text {
    height: 16px;
    background: linear-gradient(90deg, var(--color-bg-tertiary) 25%, var(--color-bg-hover) 50%, var(--color-bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
    width: 80%;
}

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

/* 圖表區域 */
.chart-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chart-header {
    padding: var(--spacing-lg) var(--spacing-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(249, 115, 22, 0.06);
    background-color: var(--color-bg-secondary);
}

.stock-info {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
}

.stock-code {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stock-name {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.stock-price-info {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-lg);
}

.current-price {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.price-change {
    font-size: var(--font-size-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    box-shadow: var(--shadow-sm);
}

.price-change.up {
    color: var(--color-danger);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.12) 0%, rgba(239, 68, 68, 0.08) 100%);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.price-change.down {
    color: var(--color-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(16, 185, 129, 0.08) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.chart-wrapper {
    flex: 1;
    padding: var(--spacing-xl) var(--spacing-2xl);
    min-height: 0;
    position: relative;
}

.chart-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--spacing-2xl);
    right: var(--spacing-2xl);
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(249, 115, 22, 0.1) 50%,
        transparent 100%
    );
}

.chart {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
}

.chart-controls {
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-top: 1px solid rgba(249, 115, 22, 0.06);
    display: flex;
    justify-content: center;
    background-color: var(--color-bg-secondary);
}

.time-range-btns {
    display: flex;
    gap: var(--spacing-sm);
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(249, 115, 22, 0.08);
}

.range-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
}

.range-btn:hover {
    color: var(--color-text-primary);
    background-color: rgba(249, 115, 22, 0.05);
}

.range-btn.active {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* 搜尋框 */
.search-box {
    position: relative;
    width: 240px;
}

.search-box .search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    transition: all var(--transition-normal);
    z-index: 1;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 42px;
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(249, 115, 22, 0.08);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    box-shadow: 0 1px 2px rgba(249, 115, 22, 0.04);
}

.search-box input:hover {
    border-color: rgba(249, 115, 22, 0.15);
    background-color: #fff;
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1),
                0 2px 8px rgba(249, 115, 22, 0.08);
}

.search-box input:focus + .search-icon,
.search-box:focus-within .search-icon {
    color: var(--color-accent);
    transform: translateY(-50%) scale(1.1);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

/* ==========================================================================
   個人面板
   ========================================================================== */
.profile-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.auth-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.auth-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    max-width: 420px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(249, 115, 22, 0.06);
}

.auth-icon {
    width: 96px;
    height: 96px;
    margin: 0 auto var(--spacing-xl);
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.15) 0%, rgba(249, 115, 22, 0.08) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow:
        0 4px 20px rgba(249, 115, 22, 0.12),
        inset 0 -2px 8px rgba(249, 115, 22, 0.08);
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.auth-icon::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, transparent 100%);
    opacity: 0.2;
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.2;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.1;
    }
}

.auth-icon svg {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    position: relative;
    z-index: 1;
}

.auth-card h2 {
    margin-bottom: var(--spacing-sm);
}

.auth-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    margin-left: var(--spacing-md);
    border: 1px solid rgba(249, 115, 22, 0.1);
}

.btn-secondary:hover {
    background-color: var(--color-bg-hover);
    border-color: var(--color-accent);
}

.btn-full {
    width: 100%;
}

/* 用戶區塊 */
.user-section {
    max-width: 600px;
    margin: 0 auto;
}

.user-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(249, 115, 22, 0.06);
}

.user-avatar {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
    box-shadow:
        0 4px 12px rgba(249, 115, 22, 0.2),
        inset 0 -2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.user-avatar::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 70%
    );
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.user-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    display: block;
}

.user-email {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.settings-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.settings-group {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(249, 115, 22, 0.06);
}

.settings-group h3 {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--color-bg-tertiary);
}

.settings-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-bg-tertiary);
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item.clickable {
    width: 100%;
    text-align: left;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.settings-item.clickable:hover {
    background-color: var(--color-bg-hover);
}

.settings-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
}

.settings-select {
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(249, 115, 22, 0.08);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(249, 115, 22, 0.04);
}

.settings-select:hover {
    border-color: rgba(249, 115, 22, 0.15);
    background-color: #fff;
}

.settings-select:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

/* ==========================================================================
   手機版底部導航
   ========================================================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.98) 100%);
    border-top: 1px solid rgba(249, 115, 22, 0.08);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding-bottom: env(safe-area-inset-bottom);
    z-index: 100;
    backdrop-filter: blur(12px);
    box-shadow: 0 -2px 12px rgba(249, 115, 22, 0.06);
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
    position: relative;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-radius: 0 0 4px 4px;
    transition: width var(--transition-normal);
}

.nav-btn:active {
    transform: scale(0.95);
}

.nav-btn.active {
    color: var(--color-accent);
}

.nav-btn.active::before {
    width: 48px;
}

.nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 2px;
}

.nav-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* ==========================================================================
   Modal
   ========================================================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    width: 90%;
    max-width: 440px;
    animation: modalIn var(--transition-normal);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(249, 115, 22, 0.08);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: all var(--transition-normal);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(249, 115, 22, 0.08);
}

.modal-close:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
    transform: rotate(90deg) scale(1.1);
    border-color: var(--color-accent);
}

.modal-close:active {
    transform: rotate(90deg) scale(0.95);
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
}

/* 認證表單 */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.form-group input {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(249, 115, 22, 0.08);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    font-size: var(--font-size-md);
    box-shadow: 0 1px 2px rgba(249, 115, 22, 0.04);
}

.form-group input:hover {
    border-color: rgba(249, 115, 22, 0.15);
    background-color: #fff;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1),
                0 2px 8px rgba(249, 115, 22, 0.08);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--color-text-muted);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--color-bg-tertiary);
}

.btn-oauth {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.btn-oauth:hover {
    background-color: var(--color-bg-hover);
}

/* ==========================================================================
   Toast 通知
   ========================================================================== */
.toast-container {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-lg));
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(249, 115, 22, 0.08);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: toastIn var(--transition-normal);
    min-width: 280px;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.toast.success {
    border-left: 4px solid var(--color-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(255, 255, 255, 0.95) 100%);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(255, 255, 255, 0.95) 100%);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(255, 255, 255, 0.95) 100%);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==========================================================================
   滾動條美化
   ========================================================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-radius: var(--radius-full);
    transition: background var(--transition-normal);
}

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

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) var(--color-bg-tertiary);
}

/* ==========================================================================
   頁面加載動畫
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.app-container {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar {
    animation: slideInLeft 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.panel.active {
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Loading 狀態
   ========================================================================== */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

.loading-dots {
    display: flex;
    gap: var(--spacing-sm);
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    animation: loadingDots 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(1) { animation-delay: 0s; }
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes loadingDots {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.3;
    }
    30% {
        transform: translateY(-12px);
        opacity: 1;
    }
}

.skeleton-loader {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 25%,
        var(--color-bg-hover) 50%,
        var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeletonLoad 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

/* ==========================================================================
   工具類別
   ========================================================================== */
.hidden {
    display: none !important;
}

/* 無障礙：僅供螢幕閱讀器 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus 可見性 */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   響應式設計
   ========================================================================== */
.desktop-only {
    display: flex;
}

.mobile-only {
    display: none;
}

/* 手機版 (寬度 < 768px) */
@media (max-width: 767px) {
    .desktop-only {
        display: none !important;
    }

    .mobile-only {
        display: flex !important;
    }

    .main-content {
        padding-bottom: var(--bottom-nav-height);
    }

    /* 報價面板 - 手機版為垂直排列 */
    .quote-container {
        flex-direction: column;
    }

    .stock-list {
        width: 100%;
        height: auto;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid rgba(249, 115, 22, 0.06);
    }

    .stock-items {
        display: flex;
        overflow-x: auto;
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .stock-item {
        flex-shrink: 0;
        min-width: 140px;
        border-bottom: none;
        border-radius: var(--radius-lg);
        background-color: var(--color-bg-secondary);
        border: 1px solid rgba(249, 115, 22, 0.08);
        box-shadow: var(--shadow-sm);
    }

    /* 聊天面板 */
    .message {
        max-width: 88%;
    }

    .chat-container {
        max-width: 100%;
    }

    /* 搜尋框 */
    .search-box {
        width: 100%;
    }

    .panel-header {
        padding: 0 var(--spacing-lg);
        height: 64px;
    }

    .panel-header::after {
        left: var(--spacing-lg);
        right: var(--spacing-lg);
    }

    .chat-messages {
        padding: var(--spacing-lg) var(--spacing-md);
        gap: var(--spacing-lg);
    }

    .chat-input-container {
        padding: var(--spacing-md);
    }

    .profile-container {
        padding: var(--spacing-lg);
    }

    /* Toast 位置調整 */
    .toast-container {
        bottom: calc(var(--bottom-nav-height) + var(--spacing-lg) + env(safe-area-inset-bottom));
        width: calc(100% - var(--spacing-xl));
        left: 50%;
        transform: translateX(-50%);
    }

    /* 圖表區域 */
    .chart-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .chart-wrapper {
        padding: var(--spacing-md);
    }

    .chart-wrapper::before {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }

    /* 股票代碼顯示 */
    .stock-code {
        font-size: var(--font-size-xl);
    }

    .current-price {
        font-size: var(--font-size-xl);
    }
}

/* 平板版 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .stock-list {
        width: 220px;
    }
}