:root {
    /* 色彩 */
    --color-primary: #2D68FF;
    --color-primary-light: #5188FF;
    --color-primary-dark: #1A4CD6;
    --color-accent: #FF5722;
    --color-text: #222222;
    --color-text-light: #666666;
    --color-background: #F8F9FC;
    --color-card: #FFFFFF;
    --color-border: #EEEEEE;
    --color-disabled: #DDDDDD;
    --color-error: #F44336;
    --color-success: #4CAF50;
    --color-secondary-dark:#4CAF50;
    
    /* 陰影 */
    --shadow-small: 0 2px 5px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 10px 30px rgba(0, 0, 0, 0.05);
    
    /* 間距 */
    --spacing-xs: 4px;
    --spacing-s: 8px;
    --spacing-m: 16px;
    --spacing-l: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* 邊框半徑 */
    --border-radius-s: 4px;
    --border-radius-m: 8px;
    --border-radius-l: 16px;
    --border-radius-circle: 50%;
    
    /* 字體大小 */
    --font-size-xs: 0.75rem;
    --font-size-s: 0.875rem;
    --font-size-m: 1rem;
    --font-size-l: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    
    /* 間距系統 */
    --spacing-unit: 8px;
    --spacing-xs: calc(var(--spacing-unit) * 0.5);
    --spacing-s: var(--spacing-unit);
    --spacing-m: calc(var(--spacing-unit) * 2);
    --spacing-l: calc(var(--spacing-unit) * 3);
    --spacing-xl: calc(var(--spacing-unit) * 4);
    --spacing-xxl: calc(var(--spacing-unit) * 6);
    
    /* 圓角 */
    --border-radius-s: 4px;
    --border-radius-m: 8px;
    --border-radius-l: 12px;
    --border-radius-xl: 24px;
    
    /* 過渡動畫 */
    --transition-normal: 0.3s ease;
    --transition-fast: 0.15s ease;
}

/* 暗色模式變數 */
.dark-mode {
    --color-text: #EEEEEE;
    --color-text-light: #BBBBBB;
    --color-background: #121212;
    --color-card: #1E1E1E;
    --color-border: #333333;
    --color-disabled: #444444;
    --shadow-small: 0 2px 5px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.3);
    --shadow-large: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* 全局樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans TC', sans-serif;
    background-color: var(--color-background);
    color: var(--color-primary);
    line-height: 1.6;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 頭部導航 */
.app-header {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-m) var(--spacing-xxl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-medium);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: var(--spacing-m);
    margin: 0 var(--spacing-s);
    font-weight: 500;
    transition: var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
    color: white;
}

.btn {
    cursor: pointer;
    border: none;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-s) var(--spacing-l);
    font-weight: 500;
    transition: var(--transition-fast);
    font-family: 'Noto Sans TC', sans-serif;
}

.btn-upgrade {
    background-color: var(--color-accent);
    color: white;
    border: none;
    font-weight: 500;
    padding: var(--spacing-s) var(--spacing-l);
    border-radius: var(--border-radius-m);
    transition: background-color 0.2s ease;
}

.btn-upgrade:hover {
    background-color: #e64a19;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background-color: #E64A19;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #E0E0E0;
    color: var(--color-primary);
}

.btn-secondary:hover {
    background-color: #BDBDBD;
}

.btn-large {
    padding: var(--spacing-m) var(--spacing-xl);
    font-size: 1.1rem;
}

/* 主內容區 */
.main-content {
    flex: 1;
    padding: var(--spacing-xl) var(--spacing-xxl);
    position: relative;
}

/* 筆記頁面樣式 */
.notes-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-l);
    gap: var(--spacing-m);
}

.notes-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-sm {
    font-size: 0.9rem;
    padding: 5px 10px;
}

.search-container {
    display: flex;
    width: 300px;
}

.search-container input {
    flex: 1;
    padding: var(--spacing-s) var(--spacing-m);
    border: 1px solid #E0E0E0;
    border-radius: var(--border-radius-m) 0 0 var(--border-radius-m);
    font-family: 'Noto Sans TC', sans-serif;
}

.btn-search {
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 0 var(--border-radius-m) var(--border-radius-m) 0;
    padding: var(--spacing-s) var(--spacing-m);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 45px;
}

.btn-search i {
    font-size: 1.2rem;
}

.btn-search:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.notes-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-l);
}

.note-card {
    background-color: white;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-l);
    box-shadow: var(--shadow-small);
    cursor: pointer;
    transition: var(--transition-normal);
    color: var(--color-text);
}

.note-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.note-title {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-s);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--color-text);
}

.note-preview {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-m);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    line-height: 1.5;
}

.note-meta {
    display: flex;
    justify-content: space-between;
    color: #888;
    font-size: 0.8rem;
}

.note-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    background-color: #F0F0F0;
    color: #666;
    padding: 2px 8px;
    border-radius: var(--border-radius-s);
    font-size: 0.8rem;
}

/* 空狀態 */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xxl) 0;
    color: #888;
}

.empty-icon {
    font-size: 3rem;
    color: #BDBDBD;
    margin-bottom: var(--spacing-m);
}

/* 錄音浮動按鈕 */
.recording-fab {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 90;
}

.btn-record {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-record i {
    font-size: 1.6rem;
}

.btn-record:hover {
    background-color: var(--color-accent-hover);
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

/* 錄音模態框 */
.recording-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.recording-content {
    background-color: #1a1a38;
    background-image: linear-gradient(135deg, #1a1a38 0%, #2D50FF 120%);
    border-radius: var(--border-radius-l);
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-l);
    width: 90%;
    max-width: 400px;
    text-align: center;
    color: white;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.recording-indicator {
    margin-bottom: var(--spacing-l);
    height: 100px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.wave-animation {
    width: 85%;
    height: 60px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    --recording-progress: 0;
}

.wave-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, rgba(255, 112, 67, 0.8), rgba(255, 87, 34, 0.8));
    border-radius: 30px;
    transform: scaleX(var(--recording-progress, 0));
    transform-origin: left center;
    animation: pulse 1.5s infinite;
    z-index: 1;
}

/* 波形線效果 */
.wave-bars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2;
}

.wave-bar {
    width: 3px;
    height: 20%;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 2px;
    animation: waveFluctuate 0.8s ease-in-out infinite;
}

.wave-bar:nth-child(1) { animation-delay: 0.0s; }
.wave-bar:nth-child(2) { animation-delay: 0.1s; }
.wave-bar:nth-child(3) { animation-delay: 0.2s; }
.wave-bar:nth-child(4) { animation-delay: 0.3s; }
.wave-bar:nth-child(5) { animation-delay: 0.4s; }
.wave-bar:nth-child(6) { animation-delay: 0.5s; }
.wave-bar:nth-child(7) { animation-delay: 0.6s; }
.wave-bar:nth-child(8) { animation-delay: 0.7s; }
.wave-bar:nth-child(9) { animation-delay: 0.6s; }
.wave-bar:nth-child(10) { animation-delay: 0.5s; }
.wave-bar:nth-child(11) { animation-delay: 0.4s; }
.wave-bar:nth-child(12) { animation-delay: 0.3s; }
.wave-bar:nth-child(13) { animation-delay: 0.2s; }
.wave-bar:nth-child(14) { animation-delay: 0.1s; }
.wave-bar:nth-child(15) { animation-delay: 0.0s; }

@keyframes waveFluctuate {
    0%, 100% { height: 20%; }
    50% { height: 60%; }
}

@keyframes pulse {
    0% { opacity: 0.8; }
    50% { opacity: 1; }
    100% { opacity: 0.8; }
}

@keyframes progress {
    0% { transform: scaleX(0); }
    100% { transform: scaleX(1); }
}

.recording-timer {
    font-size: 3rem;
    font-weight: 700;
    margin: var(--spacing-l) 0;
    color: white;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.recording-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.btn-control {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.btn-control:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

.btn-control:active {
    transform: translateY(1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

#btnPauseRecording {
    background-color: rgba(255, 255, 255, 0.95);
    color: #222;
}

.btn-stop {
    background-color: var(--color-accent) !important;
    color: white !important;
}

/* 處理中模態框 */
.processing-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
}

.processing-content {
    background-color: white;
    border-radius: var(--border-radius-l);
    padding: var(--spacing-xl);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--color-accent);
    border-radius: 50%;
    margin: 0 auto var(--spacing-l);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 筆記編輯模態框 */
.note-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
}

.note-modal-content {
    background-color: white;
    border-radius: var(--border-radius-m);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.note-modal-header {
    padding: var(--spacing-m) var(--spacing-l);
    border-bottom: 1px solid #EEEEEE;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: #888;
}

.note-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-m);
}

.note-tabs {
    display: flex;
    border-bottom: 1px solid #EEEEEE;
    margin-bottom: var(--spacing-m);
}

.tab-btn {
    padding: var(--spacing-s) var(--spacing-l);
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    color: #888;
    position: relative;
}

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

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
}

.tab-content {
    display: block;
}

.tab-content.hidden {
    display: none;
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: var(--spacing-m);
    border: 1px solid #EEEEEE;
    border-radius: var(--border-radius-m);
    font-family: 'Noto Sans TC', sans-serif;
    resize: vertical;
    font-size: 1rem;
    line-height: 1.6;
}

.rewrite-controls {
    margin-bottom: var(--spacing-m);
    border: 1px solid #EEEEEE;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-m);
}

.control-group {
    margin-bottom: var(--spacing-m);
    position: relative;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group.disabled {
    opacity: 0.7;
}

.control-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.segmented-control {
    display: flex;
    border: 1px solid #DDDDDD;
    border-radius: var(--border-radius-m);
    overflow: hidden;
}

.segmented-control button {
    flex: 1;
    padding: var(--spacing-s) 0;
    border: none;
    background-color: white;
    cursor: pointer;
    font-family: 'Noto Sans TC', sans-serif;
}

.segmented-control button.active {
    background-color: var(--color-primary);
    color: white;
}

.segmented-control.disabled button {
    cursor: not-allowed;
}

.prime-badge {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: var(--border-radius-s);
    margin-left: var(--spacing-s);
    font-weight: bold;
    text-transform: uppercase;
    vertical-align: middle;
}

select {
    width: 100%;
    padding: var(--spacing-s);
    border: 1px solid #DDDDDD;
    border-radius: var(--border-radius-m);
    font-family: 'Noto Sans TC', sans-serif;
}

input[type="range"] {
    width: 100%;
}

.btn-rewrite {
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-s) var(--spacing-l);
    margin-top: var(--spacing-m);
    cursor: pointer;
    position: relative;
    font-family: 'Noto Sans TC', sans-serif;
}

.btn-rewrite.disabled {
    background-color: #BDBDBD;
    cursor: not-allowed;
}

.note-modal-footer {
    padding: var(--spacing-m) var(--spacing-l);
    border-top: 1px solid #EEEEEE;
}

.note-tags {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-m);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    flex: 1;
}

.btn-add-tag {
    background-color: #F0F0F0;
    border: none;
    border-radius: var(--border-radius-s);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin-left: var(--spacing-s);
    position: relative;
}

.btn-add-tag.disabled {
    background-color: #E0E0E0;
    cursor: not-allowed;
    color: #A0A0A0;
}

.note-actions {
    display: flex;
    gap: var(--spacing-m);
}

.note-actions input {
    flex: 1;
    padding: var(--spacing-s) var(--spacing-m);
    border: 1px solid #DDDDDD;
    border-radius: var(--border-radius-m);
    font-family: 'Noto Sans TC', sans-serif;
}

/* 升級模態框樣式 */
.upgrade-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.upgrade-content {
    background-color: white;
    border-radius: var(--border-radius-m);
    width: 90%;
    max-width: 800px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.upgrade-header {
    padding: var(--spacing-m) var(--spacing-l);
    border-bottom: 1px solid #EEEEEE;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text);
}

.upgrade-header h3 {
    font-size: 1.3rem;
    margin: 0;
    color: var(--color-text);
}

.upgrade-body {
    padding: var(--spacing-xl);
}

.plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-l);
    margin-bottom: var(--spacing-xl);
}

.plan {
    border: 1px solid #EEEEEE;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-l);
    text-align: center;
    position: relative;
    background-color: white;
    color: var(--color-text);
}

.plan.featured {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-medium);
}

.plan-badge {
    position: absolute;
    top: 0;
    right: var(--spacing-l);
    background-color: var(--color-accent);
    color: white;
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 0 0 var(--border-radius-s) var(--border-radius-s);
}

.plan h4 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-m);
    color: var(--color-text);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-l);
    color: var(--color-primary);
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: #888;
}

.features {
    list-style: none;
    margin-bottom: var(--spacing-l);
    text-align: left;
    color: var(--color-text);
}

.features li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid #F0F0F0;
}

.features li:last-child {
    border-bottom: none;
}

.plan-cta {
    margin-top: var(--spacing-l);
}

.upgrade-note {
    text-align: center;
    font-size: 0.9rem;
    color: #888;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-m);
        flex-wrap: wrap;
    }
    
    .main-nav {
        order: 3;
        width: 100%;
        margin-top: var(--spacing-m);
    }
    
    .main-nav ul {
        justify-content: space-between;
    }
    
    .main-content {
        padding: var(--spacing-l) var(--spacing-m);
    }
    
    .notes-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .search-container {
        width: 100%;
        margin-top: var(--spacing-m);
    }
    
    .note-actions {
        flex-direction: column;
    }
}

/* 暗色模式樣式 */
.dark-mode {
    /* 基礎樣式 */
    body {
        background-color: var(--color-background);
        color: var(--color-text);
    }
    
    /* 標頭 */
    .app-header {
        background-color: #1a1a2e;
    }
    
    .logo h1 {
        color: white;
    }
    
    .main-nav a {
        color: rgba(255, 255, 255, 0.7);
    }
    
    .main-nav a:hover,
    .main-nav a.active {
        color: white;
    }
    
    /* 按鈕 */
    .btn-secondary {
        background-color: #333333;
        color: #EEEEEE;
    }
    
    .btn-secondary:hover {
        background-color: #444444;
    }
    
    .btn-upgrade {
        background-color: var(--color-accent);
    }
    
    .btn-upgrade:hover {
        background-color: #e64a19;
    }
    
    /* 筆記卡片 */
    .note-card {
        background-color: var(--color-card);
        box-shadow: var(--shadow-small);
    }
    
    .note-card:hover {
        box-shadow: var(--shadow-medium);
    }
    
    /* 輸入框 */
    input[type="search"],
    input[type="text"],
    textarea,
    select {
        background-color: #333333;
        color: #EEEEEE;
        border-color: var(--color-border);
    }
    
    /* 標籤 */
    .tag {
        background-color: #333333;
    }
    
    /* 模態框 */
    .note-modal-content,
    .upgrade-content,
    .style-modal-content,
    .processing-content {
        background-color: var(--color-card);
    }
    
    /* 分頁標籤 */
    .tab-btn {
        color: var(--color-text-light);
    }
    
    .tab-btn.active {
        color: var(--color-primary);
    }
    
    /* 方案卡片 */
    .plan {
        background-color: var(--color-card);
        border-color: #333;
    }
    
    .plan h4, 
    .upgrade-header h3 {
        color: #eee;
    }
    
    .features li {
        border-color: #333;
    }
}

/* 筆記內容檢視模式 */
.note-view-mode {
    padding: var(--spacing-m);
}

.note-rewritten {
    background-color: var(--color-card);
    border-radius: var(--border-radius-m);
    padding: var(--spacing-m);
    margin-bottom: var(--spacing-m);
    box-shadow: var(--shadow-small);
}

.note-rewritten h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-s);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: var(--spacing-xs);
    display: inline-block;
}

.note-rewritten-content {
    color: var(--color-text);
    line-height: 1.6;
    font-size: 1rem;
    white-space: pre-line;
}

.note-original-toggle {
    text-align: center;
    margin: var(--spacing-m) 0;
}

.note-original {
    background-color: var(--color-card);
    border-radius: var(--border-radius-m);
    padding: var(--spacing-m);
    margin-bottom: var(--spacing-m);
    box-shadow: var(--shadow-small);
    transition: all 0.3s ease;
    overflow: hidden;
    max-height: 1000px;
}

.note-original.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
    opacity: 0;
}

.note-original h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-s);
    color: var(--color-text-light);
}

.note-original-content {
    color: var(--color-text-light);
    line-height: 1.5;
    font-size: 0.95rem;
    white-space: pre-line;
}

.note-append-section {
    text-align: center;
    margin: var(--spacing-m) 0;
    padding: var(--spacing-m);
    border-top: 1px solid var(--color-border);
}

.hidden {
    display: none;
}

.edit-buttons {
    margin-top: var(--spacing-m);
    text-align: right;
}

/* 內嵌錄音界面 */
.inline-recording-ui {
    background-color: #1a1a38;
    background-image: linear-gradient(135deg, #1a1a38 0%, #2D50FF 120%);
    border-radius: var(--border-radius-l);
    padding: var(--spacing-m);
    width: 100%;
    text-align: center;
    color: white;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    margin: var(--spacing-m) 0;
}

.inline-recording-ui .recording-indicator {
    height: 80px;
    margin-bottom: var(--spacing-s);
}

.inline-recording-timer {
    font-size: 2rem;
    font-weight: 700;
    margin: var(--spacing-m) 0;
    color: white;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.inline-recording-ui .recording-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-l);
    margin-top: var(--spacing-m);
}

.inline-recording-ui .btn-control {
    width: 50px;
    height: 50px;
}

/* 筆記模態框底部按鈕 */
.note-modal-footer .note-actions .btn-primary {
    background-color: #FF5722;
    color: white;
    font-weight: 600;
    padding: var(--spacing-s) var(--spacing-xl);
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
}

.note-modal-footer .note-actions .btn-primary:hover {
    background-color: #E64A19;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

/* 內嵌處理狀態UI */
.inline-processing-ui {
    padding: 15px;
    border-radius: 8px;
    background-color: #f8f9fa;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin: 15px 0;
    transition: all 0.3s ease;
}

.inline-processing-ui .processing-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
    text-align: center;
}

.inline-processing-ui .processing-spinner {
    text-align: center;
    margin-bottom: 12px;
    font-size: 24px;
    color: #4285f4;
}

.inline-processing-ui .processing-steps {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
}

.inline-processing-ui .inline-processing-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 22%;
    position: relative;
    color: #888;
    transition: all 0.3s ease;
}

.inline-processing-ui .inline-processing-step .step-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

.inline-processing-ui .inline-processing-step .step-text {
    font-size: 12px;
    text-align: center;
    transition: all 0.3s ease;
}

.inline-processing-ui .inline-processing-step.active {
    color: #4285f4;
}

.inline-processing-ui .inline-processing-step.active .step-icon {
    background-color: #4285f4;
    color: white;
    box-shadow: 0 2px 8px rgba(66, 133, 244, 0.5);
}

.inline-processing-ui .inline-processing-step.completed {
    color: #34a853;
}

.inline-processing-ui .inline-processing-step.completed .step-icon {
    background-color: #34a853;
    color: white;
}

/* 進度條樣式 */
.processing-progress-bar {
    width: 100%;
    height: 8px;
    background-color: #eaeaea;
    border-radius: 10px;
    margin: 12px 0;
    position: relative;
    overflow: hidden;
}

.processing-progress-bar .progress-bar-fill {
    position: absolute;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #4285f4, #34a853);
    border-radius: 10px;
    transition: width 0.8s ease;
}

/* 完成狀態樣式 */
.inline-processing-complete {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
    color: #34a853;
    font-weight: 600;
    animation: fadeIn 0.5s ease-in;
}

.inline-processing-complete i {
    font-size: 20px;
    margin-right: 8px;
}

/* 錯誤狀態樣式 */
.inline-processing-error {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
    color: #ea4335;
    font-weight: 600;
    animation: fadeIn 0.5s ease-in;
}

.inline-processing-error i {
    font-size: 20px;
    margin-right: 8px;
}

/* 動畫效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.pulse-animation {
    animation: pulse 1.5s infinite ease-in-out;
}

/* 時間戳顯示樣式 */
.note-timestamp {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-bottom: var(--spacing-s);
    font-style: italic;
    text-align: right;
}

/* 原始內容時間戳樣式 */
.original-timestamp {
    display: block;
    padding: var(--spacing-xs) var(--spacing-s);
    margin: var(--spacing-s) 0;
    border-radius: var(--border-radius-s);
    font-size: 0.9rem;
    font-weight: 500;
}

.recording-timestamp {
    background-color: rgba(45, 104, 255, 0.1);
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
}

.append-timestamp {
    background-color: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
    border-left: 3px solid #4CAF50;
}

/* 臨時處理卡片樣式 */
.temp-processing-card {
    border-left: 4px solid var(--color-primary);
    background-color: rgba(45, 104, 255, 0.05);
    transition: all 0.3s ease;
}

/* 段落分隔樣式 */
.note-paragraph {
    margin-bottom: var(--spacing-m);
    padding-bottom: var(--spacing-s);
    border-bottom: 1px solid #eee;
}

/* 風格卡片選擇器樣式 */
.style-cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-s);
    margin-bottom: var(--spacing-s);
    width: 100%;
    overflow-x: auto;
    padding-bottom: var(--spacing-s);
}

.style-cards-container.disabled {
    opacity: 0.7;
    pointer-events: none;
}

.style-card-small {
    flex: 0 0 auto;
    width: 80px;
    height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-m);
    background-color: #f5f5f5;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: var(--spacing-xs);
    position: relative;
}

.style-card-small:hover {
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.style-card-small.active {
    border-color: var(--color-primary);
    background-color: rgba(45, 104, 255, 0.1);
}

.style-card-small .style-icon {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.style-card-small .style-name {
    font-size: 0.8rem;
    text-align: center;
    font-weight: 500;
    color: var(--color-text);
}

.style-preview {
    background-color: #f9f9f9;
    border-radius: var(--border-radius-m);
    padding: var(--spacing-m);
    margin-top: var(--spacing-s);
    transition: all 0.2s ease;
    border-left: 3px solid var(--color-primary);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
}

.style-preview.visible {
    max-height: 200px;
    opacity: 1;
    margin-bottom: var(--spacing-m);
}

.style-prompt {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-s);
}

.style-sample {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-style: italic;
}

.hidden {
    display: none;
}

/* 原始內容時間戳樣式 */
.original-timestamp {
    display: block;
    padding: var(--spacing-xs) var(--spacing-s);
    margin: var(--spacing-s) 0;
    border-radius: var(--border-radius-s);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 筆記內容操作按鈕樣式 */
.note-rewritten-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.note-content-actions {
    display: flex;
    gap: 10px;
}

.note-action-btn {
    padding: 5px 10px;
    border: none;
    border-radius: 4px;
    background-color: #f8f9fa;
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s ease;
}

.note-action-btn:hover {
    background-color: #e9ecef;
}

.note-delete-btn {
    color: #dc3545;
}

.note-delete-btn:hover {
    background-color: #dc3545;
    color: white;
}

/* 筆記編輯模式樣式 */
.rewritten-content-editor {
    width: 100%;
    min-height: 200px;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-family: inherit;
    font-size: inherit;
    line-height: 1.5;
    margin-bottom: 15px;
}

.rewritten-edit-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-bottom: 15px;
}

.edit-action-btn {
    padding: 8px 15px;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 追加錄音按鈕樣式 */
#btnAppendRecording i {
    font-size: 1.2em;
    margin-right: 5px;
}

#btnAppendRecording {
    padding: 8px 15px;
    font-size: 1.05em;
} 

/* 將返回按鈕放置在「升級至 Prime」按鈕的左側或右側，並調整樣式 */
.app-header .user-actions {
    display: flex; /* 讓子元素水平排列 */
    align-items: center; /* 垂直置中 */
    gap: 15px; /* 增加按鈕之間的間距 */
}

.btn-back {
    display: inline-flex; /* 讓內容水平排列並允許設定間距 */
    align-items: center; /* 垂直置中文字和圖示 */
    padding: 8px 15px; /* 按鈕內邊距 */
    background-color: var(--color-secondary-dark); /* 使用你網站的次要顏色或自定義顏色 */
    color: var(--color-card); /* 文字顏色 */
    border: none;
    border-radius: 8px; /* 圓角 */
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none; /* 移除超連結下劃線 */
    transition: background-color 0.2s ease, transform 0.1s ease; /* 平滑過渡效果 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 輕微陰影 */
}

.btn-back:hover {
    background-color: var(--color-secondary); /* 鼠標懸停時的顏色 */
    transform: translateY(-1px); /* 輕微上浮效果 */
}

.btn-back i {
    margin-right: 8px; /* 圖示與文字的間距 */
}

/* 確保按鈕在手機版也能適當顯示 */
@media (max-width: 768px) {
    .app-header .user-actions {
        /* 在較小的螢幕上，你可能需要調整這些按鈕的佈局 */
        /* 例如，可以讓它們換行或調整間距 */
        gap: 10px;
    }

    .btn-back {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}