/* styles.css */

/* 1. CSS Reset & Globals */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Design System Tokens */

    /* 1.1. Colors */
    /* Neutral - Text */
    --color-text-title: rgba(0, 0, 0, 1.0);
    --color-text-subtitle: rgba(0, 0, 0, 0.8);
    --color-text-body: rgba(0, 0, 0, 0.5);
    --color-text-helper: rgba(0, 0, 0, 0.3);
    --color-text-disabled: rgba(0, 0, 0, 0.2);

    /* Neutral - Borders */
    --color-border-divider: rgba(0, 0, 0, 0.1);
    --color-border-component: rgba(0, 0, 0, 0.08);

    /* Neutral - Backgrounds */
    --color-bg-card: rgba(0, 0, 0, 0.06);
    --color-bg-area: rgba(0, 0, 0, 0.04);
    --color-bg-btn-secondary: rgba(0, 0, 0, 0.02);
    --color-bg-main: #FFFFFF;

    /* Accent */
    --color-accent-primary: #FEC33A;
    --color-accent-primary-hover: #FFDC8B;
    --color-accent-primary-bg: #FFFAEE;
    --color-btn-primary-bg: #000000;
    --color-btn-primary-text: #FFFFFF;
    --color-btn-primary-hover-bg: rgba(0, 0, 0, 0.8);

    /* Status */
    --color-status-info: #FE963A;
    --color-status-warning: #FF4C4C;
    --color-status-success: #36EA60;
    --color-status-link: #368AEA;

    /* Gradients */
    --gradient-header: linear-gradient(135deg, #FFE9B6, #FFD471);
    --gradient-main: linear-gradient(to bottom, #FFF4D9, #FFFFFF);

    /* 1.2. Typography */
    --font-family-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    
    /* Size & Line Height */
    --font-size-xs: 12px; --line-height-xs: 20px; /* Helper/Tag */
    --font-size-sm: 14px; --line-height-sm: 22px; /* Body */
    --font-size-md: 16px; --line-height-md: 24px; /* Subtitle */
    --font-size-lg: 18px; --line-height-lg: 28px; /* Title L */
    --font-size-xl: 20px; --line-height-xl: 32px; /* Title M */
    --font-size-2xl: 24px; --line-height-2xl: 36px; /* Title L */
    --font-size-3xl: 28px; --line-height-3xl: 40px; /* Main Title */

    /* Letter Spacing */
    --tracking-tight: -0.01em;
    --tracking-normal: 0em;

    /* 1.3. Radii & Borders */
    --radius-sm: 4px;   /* Small components */
    --radius-md: 8px;   /* Cards (S) */
    --radius-lg: 12px;  /* Cards (M) */
    --radius-xl: 16px;  /* Cards (L) */
    --radius-full: 9999px; /* Buttons */
    --border-width-sm: 0.5px;
    --border-width-md: 1px;
}

/* 2. Base Styles */
html {
    font-family: var(--font-family-sans);
    background-color: var(--color-bg-main);
    color: var(--color-text-body);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-sm);
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 3. Typography Classes (mapping from old to new) */
.text-title-xl { /* Was: PDF to Text (OCR) */
    font-size: var(--font-size-3xl);
    line-height: var(--line-height-3xl);
    letter-spacing: var(--tracking-tight);
    color: var(--color-text-title);
    font-weight: 600;
}
#subtitle.text-body { /* Was: 纯前端... */
    font-size: var(--font-size-md);
    line-height: var(--line-height-md);
    color: var(--color-text-subtitle);
    margin-top: 8px;
}
.text-title-m { /* Was: 控制面板, 识别结果 */
    font-size: var(--font-size-xl);
    line-height: var(--line-height-xl);
    letter-spacing: var(--tracking-tight);
    color: var(--color-text-title);
    font-weight: 600;
    margin-bottom: 24px;
}
.text-title-s { /* Was: 文本处理选项, 导出选项 */
    font-size: var(--font-size-lg);
    line-height: var(--line-height-lg);
    color: var(--color-text-subtitle);
    font-weight: 500;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: var(--border-width-md) solid var(--color-border-divider);
}
.text-small { /* Was: labels, info text */
    font-size: var(--font-size-xs);
    line-height: var(--line-height-xs);
    color: var(--color-text-helper);
}

/* 4. Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}
.header {
    text-align: center;
    padding: 48px 24px;
    border-radius: var(--radius-xl);
    background: var(--gradient-header);
    margin-bottom: 32px;
}
.main-content {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
    align-items: start;
}
.footer {
    text-align: center;
    margin-top: 48px;
    padding: 24px;
    color: var(--color-text-helper);
}

/* 5. Components */
/* Cards */
.card {
    background-color: var(--color-bg-main);
    border-radius: var(--radius-lg);
    border: var(--border-width-md) solid var(--color-border-component);
    padding: 24px;
    transition: all 0.2s ease-in-out;
}
.card:hover {
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 16px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-section {
    margin-top: 24px;
    padding-top: 24px;
    border-top: var(--border-width-md) solid var(--color-border-divider);
}
label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    margin-bottom: 8px;
    font-weight: 500;
}
.input, .select {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: var(--border-width-md) solid var(--color-border-component);
    background-color: var(--color-bg-btn-secondary);
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input:focus, .select:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px var(--color-accent-primary-bg);
}
.file-input {
    display: none;
}
.file-label .btn {
    width: 100%;
    text-align: center;
}
.file-info {
    margin-top: 8px;
    word-break: break-all;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}
.btn-icon {
    margin-right: 8px;
}
.btn-primary {
    background-color: var(--color-btn-primary-bg);
    color: var(--color-btn-primary-text);
}
.btn-primary:hover {
    background-color: var(--color-btn-primary-hover-bg);
}
.btn-secondary {
    background-color: var(--color-bg-btn-secondary);
    color: var(--color-text-subtitle);
    border: 1px solid var(--color-border-component);
}
.btn-secondary:hover {
    background-color: var(--color-bg-card);
    border-color: var(--color-border-divider);
}
.btn:disabled {
    background-color: var(--color-bg-area);
    color: var(--color-text-disabled);
    cursor: not-allowed;
    border-color: transparent;
}
.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 12px;
    margin-top: 24px;
}

/* Checkbox & Radio */
.checkbox-group, .mode-switcher {
    margin-bottom: 16px;
}
.checkbox-label, .mode-option {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: background-color 0.2s;
}
.checkbox-label:hover, .mode-option:hover {
    background-color: var(--color-bg-area);
}
input[type="checkbox"], input[type="radio"] {
    margin-right: 10px;
    accent-color: var(--color-accent-primary);
}
.mode-switcher {
    display: flex;
    border: 1px solid var(--color-border-component);
    border-radius: var(--radius-full);
    padding: 4px;
    margin-bottom: 24px;
}
.mode-option {
    flex: 1;
    justify-content: center;
    margin: 0;
    padding: 0;
    border-radius: var(--radius-full);
}
.mode-option input[type="radio"] {
    display: none;
}
.mode-option input[type="radio"]:checked + .mode-label {
    background-color: var(--color-btn-primary-bg);
    color: var(--color-bg-main);
}
.mode-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    transition: all 0.2s ease-in-out;
    width: 100%;
    text-align: center;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    display: block;
}

/* Progress Bar */
.progress-section {
    margin-top: 24px;
}
.progress-container {
    width: 100%;
    height: 8px;
    background-color: var(--color-bg-area);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar {
    width: 0;
    height: 100%;
    background-color: var(--color-accent-primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}
.status-text {
    margin-top: 8px;
    text-align: center;
    color: var(--color-text-helper);
}

/* Result Area */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.result-stats {
    display: flex;
    gap: 16px;
    color: var(--color-text-helper);
}
.output-textarea {
    width: 100%;
    height: calc(100vh - 300px);
    min-height: 400px;
    padding: 16px;
    border-radius: var(--radius-lg);
    border: var(--border-width-md) solid var(--color-border-component);
    background-color: var(--color-bg-area);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--color-text-body);
    resize: vertical;
}
.output-textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
}
.output-textarea::placeholder {
    color: var(--color-text-helper);
}

/* Batch Mode Styles */
.batch-list {
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid var(--color-border-component);
    border-radius: var(--radius-md);
    padding: 8px;
    margin-top: 16px;
}
.batch-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--color-border-divider);
    padding-bottom: 8px;
}
.batch-tab {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    cursor: pointer;
    background-color: var(--color-bg-btn-secondary);
    color: var(--color-text-body);
    border: 1px solid transparent;
    font-size: var(--font-size-xs);
}
.batch-tab.active {
    background-color: var(--color-accent-primary-bg);
    color: var(--color-accent-primary);
    font-weight: 600;
    border-color: var(--color-accent-primary);
}

/* Responsive Design */
@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    .output-textarea {
        height: 400px;
        min-height: 300px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 16px;
    }
    .header {
        padding: 32px 16px;
        margin-bottom: 24px;
    }
    .card {
        padding: 16px;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .button-group {
        grid-template-columns: 1fr;
    }
}

/* Batch List Item */
.batch-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-btn-secondary);
    margin-bottom: 4px;
}
.batch-item-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: var(--font-size-xs);
    color: var(--color-text-body);
}
.batch-item-status {
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    font-weight: 500;
}
.batch-item-status.pending {
    color: var(--color-text-helper);
    background-color: var(--color-bg-area);
}
.batch-item-status.processing {
    color: var(--color-status-info);
    background-color: #fe963a20;
}
.batch-item-status.success {
    color: var(--color-status-success);
    background-color: #36ea6020;
}
.batch-item-status.error {
    color: var(--color-status-warning);
    background-color: #ff4c4c20;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    background-color: var(--color-btn-primary-bg);
    color: var(--color-btn-primary-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
    z-index: 1000;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}
.toast.success {
    background-color: var(--color-status-success);
    color: #000;
}
.toast.warning {
    background-color: var(--color-status-warning);
    color: #fff;
}
.toast.info {
    background-color: var(--color-status-info);
    color: #fff;
}