:root {
    /* Google 經典四色核心變數 */
    --google-blue: #4285F4;
    --google-red: #EA4335;
    --google-yellow: #FBBC05;
    --google-green: #34A853;
    --google-blue-dark: #1a73e8;
    --google-four-bar: linear-gradient(90deg, #4285F4 25%, #EA4335 25% 50%, #FBBC05 50% 75%, #34A853 75%);
    --google-four-vertical: linear-gradient(180deg, #4285F4 25%, #EA4335 25% 50%, #FBBC05 50% 75%, #34A853 75%);

    /* 預設淺色模式配色 (Google Blue 藍色系明亮清爽主題) */
    --bg-gradient: linear-gradient(180deg, #edf3fa 0%, #e2ecf7 100%);
    --header-bg: rgba(255, 255, 255, 0.88);
    --card-bg: #ffffff;
    --card-hover-bg: #f8faff;
    --glass-border: rgba(66, 133, 244, 0.15);
    --glass-border-hover: rgba(66, 133, 244, 0.45);
    --accent-glow: rgba(66, 133, 244, 0.2);
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --input-bg: rgba(255, 255, 255, 0.95);
    --input-border: rgba(66, 133, 244, 0.28);
    --card-watermark: rgba(66, 133, 244, 0.14);
    --card-social-bg: #ffffff;
    --card-social-border: rgba(66, 133, 244, 0.22);
    --card-social-shadow: 0 1px 4px rgba(66, 133, 244, 0.1);
    --card-action-bg: rgba(66, 133, 244, 0.1);
    --card-action-color: #1a73e8;
    --title-gradient: linear-gradient(135deg, #1a73e8 0%, #1e40af 50%, #4285F4 100%);
    --tagline-color: #1a73e8;
    --highlight-bg: rgba(251, 188, 5, 0.4);
    --highlight-color: #854d0e;
    --card-shadow: 0 4px 20px rgba(66, 133, 244, 0.08);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

[data-theme="dark"] {
    /* 深色模式配色 (Google Blue 藍色系深空主題) */
    --bg-gradient: linear-gradient(180deg, #101a2e 0%, #0a111f 50%, #060b14 100%);
    --header-bg: rgba(13, 21, 39, 0.85);
    --card-bg: rgb(21, 34, 56);
    --card-hover-bg: rgb(28, 45, 74);
    --glass-border: rgba(66, 133, 244, 0.18);
    --glass-border-hover: rgba(66, 133, 244, 0.5);
    --accent-glow: rgba(66, 133, 244, 0.25);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --input-bg: rgba(66, 133, 244, 0.08);
    --input-border: rgba(66, 133, 244, 0.25);
    --card-watermark: rgba(255, 255, 255, 0.13);
    --card-social-bg: #ffffff;
    --card-social-border: rgba(255, 255, 255, 0.25);
    --card-social-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
    --card-action-bg: rgba(66, 133, 244, 0.15);
    --card-action-color: #93c5fd;
    --title-gradient: linear-gradient(135deg, #ffffff 0%, #93c5fd 50%, #4285F4 100%);
    --tagline-color: #60a5fa;
    --highlight-bg: rgba(251, 188, 5, 0.35);
    --highlight-color: #fef08a;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

body {
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* 頂部常駐搜尋區域 (Sticky Header) */
.sticky-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    transition: all 0.3s ease;
}

/* 頂部 Google 經典四色裝飾飾條 */
.sticky-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--google-four-bar);
}

.header-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.header-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-title {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--title-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Google 4色圓點標誌裝飾 */
.google-dots {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-right: 2px;
}

.g-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    display: inline-block;
}

.g-dot.blue { background-color: var(--google-blue); }
.g-dot.red { background-color: var(--google-red); }
.g-dot.yellow { background-color: var(--google-yellow); }
.g-dot.green { background-color: var(--google-green); }

.header-badge {
    background: rgba(66, 133, 244, 0.15);
    border: 1px solid rgba(66, 133, 244, 0.35);
    color: var(--google-blue);
    font-size: 0.85rem;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-weight: 600;
}

[data-theme="dark"] .header-badge,
:root:not([data-theme="light"]) .header-badge {
    color: #93c5fd;
}

/* 深淺色主題切換按鈕 */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.theme-toggle-btn:hover {
    border-color: var(--google-blue);
    transform: rotate(15deg) scale(1.08);
    background: var(--card-hover-bg);
    color: var(--google-blue);
}

.theme-icon-sun, .theme-icon-moon {
    width: 20px;
    height: 20px;
}

/* 搜尋列 */
.search-wrapper {
    position: relative;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: 1.1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--google-blue);
    pointer-events: none;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 0.85rem 3rem 0.85rem 3rem;
    font-size: 1.05rem;
    color: var(--text-primary);
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.search-input:focus {
    background: var(--card-hover-bg);
    border-color: var(--google-blue);
    box-shadow: 0 0 0 4px rgba(66, 133, 244, 0.25), inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.clear-search-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    width: 24px;
    height: 24px;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1;
    transition: all 0.2s;
}

.clear-search-btn:hover {
    background: var(--google-blue);
    color: #fff;
}

/* 主容器與卡片列表 */
.main-content {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.cards-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    isolation: isolate;
}

/*
 * 卡片發光包裝層：
 * 不再使用環形漸層，改用 JS 計算滑鼠到四邊的距離，
 * 以 box-shadow 在最近的邊緣透出對應 Google 顏色微光。
 * 上=藍 右=紅 下=黃 左=綠
 */
.card-glow-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                box-shadow 0.3s ease;
}

.card-glow-wrapper:hover {
    transform: translateY(-3px) scale(1.008);
}

/* 學生卡片按鈕 (由上到下排列) */
.student-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    z-index: 1;
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.8rem;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    background: var(--card-bg);
    border: 1.5px solid var(--glass-border);
    transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1),
                border-color 0.25s ease,
                box-shadow 0.25s ease;
    box-shadow: var(--card-shadow);
}

.student-card:hover {
    border-color: rgba(66, 133, 244, 0.3);
}

/* 卡片背景水印文字 */
.card-bg-watermark {
    position: absolute;
    right: 2rem;
    bottom: -0.5rem;
    max-width: 45%;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    font-family: monospace;
    color: var(--card-watermark);
    pointer-events: none;
    user-select: none;
    z-index: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: clip;
}

/* 大頭貼容器 */
.card-avatar-wrapper {
    position: relative;
    flex-shrink: 0;
    z-index: 1;
}

.card-avatar {
    width: 76px;
    height: 76px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(45deg, #cbf7e9, #bbe5ec) border-box;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.student-card:hover .card-avatar {
    transform: scale(1.06) rotate(3deg);
}

.card-avatar-placeholder {
    width: 76px;
    height: 76px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--google-blue), var(--google-green));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* 卡片資訊區 */
.card-info {
    flex: 1;
    min-width: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.card-name-row {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    min-width: 0;
}

.card-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    word-break: break-word;
    overflow-wrap: anywhere;
}

.card-special-badge {
    background: rgba(66, 133, 244, 0.12);
    border: 1px solid rgba(66, 133, 244, 0.3);
    color: var(--google-blue);
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-weight: 600;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: 100%;
}

[data-theme="dark"] .card-special-badge,
:root:not([data-theme="light"]) .card-special-badge {
    color: #93c5fd;
}

.card-tagline {
    font-size: 0.95rem;
    color: var(--tagline-color);
    font-weight: 500;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.card-experience {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.card-social-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    z-index: 3;
}

.card-social-icon {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--card-social-bg);
    border: 1px solid var(--card-social-border);
    box-shadow: var(--card-social-shadow);
    padding: 3px;
    transition: all 0.2s ease;
}

.card-social-icon:hover {
    background: var(--google-blue);
    border-color: var(--google-blue);
    transform: translateY(-2px) scale(1.12);
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.35);
}

.card-social-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 卡片右側進入箭頭按鈕 */
.card-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--card-action-bg);
    border: 1px solid var(--glass-border);
    color: var(--card-action-color);
    flex-shrink: 0;
    z-index: 1;
    transition: all 0.25s ease;
}

.student-card:hover .card-action {
    background: var(--google-blue);
    color: #ffffff;
    border-color: var(--google-blue);
    transform: translateX(4px);
    box-shadow: 0 0 15px rgba(66, 133, 244, 0.6);
}

/* 搜尋關鍵字高亮 (安全渲染 - 採用 Google Yellow 標記) */
.search-highlight {
    background: var(--highlight-bg);
    color: var(--highlight-color);
    padding: 0 3px;
    border-radius: 3px;
    font-weight: bold;
}

/* 空狀態 (No Results) */
.empty-state {
    text-align: center;
    padding: 4rem 1.5rem;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--glass-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.empty-icon {
    font-size: 3rem;
    opacity: 0.8;
}

.empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.empty-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 400px;
}

.reset-search-btn {
    margin-top: 0.5rem;
    padding: 0.6rem 1.4rem;
    background: linear-gradient(135deg, var(--google-blue), var(--google-blue-dark));
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.reset-search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.4);
}

/* 頁尾 */
.site-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--glass-border);
    margin-top: auto;
}

/* RWD 響應式調整 */
@media (max-width: 640px) {
    .student-card {
        padding: 1.2rem;
        gap: 1rem;
    }

    .card-avatar, .card-avatar-placeholder {
        width: 60px;
        height: 60px;
    }

    .card-name {
        font-size: 1.2rem;
    }

    .card-action {
        width: 36px;
        height: 36px;
    }

    .card-bg-watermark {
        display: none;
    }
}

/* ====================================================
   學生小卡內嵌全螢幕展示層 (Iframe Modal & Back Button)
   ==================================================== */
.student-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 99999;
    background: #0d1527;
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.student-modal.active {
    opacity: 1;
    pointer-events: auto;
}

/* 左上角高 z-index 返回按鈕 */
.modal-back-btn {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 100001;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 1.25rem;
    color: #ffffff;
    background: rgba(13, 21, 39, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-back-btn:hover {
    background: rgba(66, 133, 244, 0.9);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateX(-4px) scale(1.02);
    box-shadow: 0 10px 35px rgba(66, 133, 244, 0.55);
}

.modal-back-btn:active {
    transform: translateX(-2px) scale(0.98);
}

.modal-back-btn svg {
    transition: transform 0.2s ease;
}

.modal-back-btn:hover svg {
    transform: translateX(-3px);
}

/* Iframe 容器與展示 */
.modal-iframe-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    flex: 1;
    overflow: hidden;
    background: transparent;
}

.student-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    background: transparent;
}

/* 載入中動畫提示 */
.modal-loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    pointer-events: none;
    z-index: 1;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(66, 133, 244, 0.2);
    border-top-color: var(--google-blue);
    border-right-color: var(--google-red);
    border-bottom-color: var(--google-yellow);
    border-left-color: var(--google-green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ====================================================
   小卡上傳按鈕與彈窗 (Upload Modal & Dropzone)
   ==================================================== */
.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.1rem;
    background: linear-gradient(135deg, var(--google-blue), var(--google-blue-dark));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.35);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-btn:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.5);
}

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

.upload-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100000;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.upload-modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.upload-dialog {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    transform: translateY(20px) scale(0.96);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
}

.upload-modal-backdrop.active .upload-dialog {
    transform: translateY(0) scale(1);
}

.upload-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    background: var(--header-bg);
}

.upload-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.upload-close-btn:hover {
    color: var(--text-primary);
    background: var(--input-bg);
}

.upload-body {
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* 拖曳放置區域 (Dropzone) */
.upload-dropzone {
    border: 2px dashed var(--google-blue);
    background: var(--input-bg);
    border-radius: var(--radius-md);
    padding: 2.2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.25s ease;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
    background: rgba(66, 133, 244, 0.15);
    border-color: var(--google-blue-dark);
    transform: scale(1.01);
}

.dropzone-icon {
    font-size: 2.8rem;
    line-height: 1;
}

.dropzone-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.dropzone-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.dropzone-select-btn {
    margin-top: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: var(--card-action-bg);
    color: var(--card-action-color);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    pointer-events: none;
}

/* 狀態提示 Banner */
.upload-alert {
    padding: 0.9rem 1.1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    line-height: 1.5;
}

.upload-alert.error {
    background: rgba(234, 67, 53, 0.15);
    border: 1px solid rgba(234, 67, 53, 0.4);
    color: #ef4444;
}

.upload-alert.success {
    background: rgba(52, 168, 83, 0.15);
    border: 1px solid rgba(52, 168, 83, 0.4);
    color: #22c55e;
}

.upload-alert.warning {
    background: rgba(251, 188, 5, 0.15);
    border: 1px solid rgba(251, 188, 5, 0.4);
    color: #eab308;
}

/* 即時預覽區塊 */
.upload-preview-container {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.upload-preview-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.upload-preview-card {
    background: var(--card-hover-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.upload-file-badge {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}

/* 底部按鈕區 */
.upload-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--glass-border);
    background: var(--header-bg);
}

.upload-cancel-btn {
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-cancel-btn:hover {
    color: var(--text-primary);
    background: var(--input-bg);
}

.upload-submit-btn {
    padding: 0.6rem 1.4rem;
    background: linear-gradient(135deg, var(--google-blue), var(--google-blue-dark));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.35);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-submit-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}

.upload-submit-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.5);
}