/* ========================================
   PDF 智能旋转工具 — 毛玻璃浅色主题
   设计：精致、克制、去 AI 味
   ======================================== */

/* --- 设计令牌 --- */
:root {
    /* 背景系统 */
    --bg-gradient-1: oklch(0.96 0.008 260);
    --bg-gradient-2: oklch(0.94 0.012 280);
    --bg-pattern: oklch(0.92 0.01 260);

    /* 毛玻璃面板 */
    --glass-bg: oklch(1 0 0 / 0.65);
    --glass-bg-strong: oklch(1 0 0 / 0.82);
    --glass-border: oklch(1 0 0 / 0.45);
    --glass-border-strong: oklch(0.85 0.01 260 / 0.5);
    --glass-highlight: oklch(1 0 0 / 0.5);
    --glass-shadow: 0 1px 3px oklch(0.2 0.02 260 / 0.04),
                    0 8px 32px oklch(0.2 0.02 260 / 0.06);
    --glass-shadow-lg: 0 2px 8px oklch(0.2 0.02 260 / 0.05),
                       0 16px 48px oklch(0.2 0.02 260 / 0.08);

    /* 文字 */
    --text-primary: oklch(0.22 0.015 260);
    --text-secondary: oklch(0.45 0.02 260);
    --text-muted: oklch(0.62 0.015 260);
    --text-faint: oklch(0.75 0.01 260);

    /* 强调色 — 低饱和靛蓝 */
    --accent: oklch(0.48 0.14 265);
    --accent-hover: oklch(0.42 0.16 265);
    --accent-light: oklch(0.92 0.04 265);
    --accent-glow: oklch(0.48 0.14 265 / 0.12);

    /* 状态色 */
    --success: oklch(0.55 0.14 150);
    --success-light: oklch(0.93 0.04 150);
    --error: oklch(0.52 0.16 25);
    --error-light: oklch(0.93 0.04 25);
    --warning: oklch(0.62 0.14 80);
    --warning-light: oklch(0.94 0.04 80);

    /* 圆角 */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* 字体 */
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;

    /* 过渡 */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 150ms var(--ease);
    --transition-base: 240ms var(--ease);
    --transition-slow: 350ms var(--ease);
}

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

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background: var(--bg-gradient-1);
    background-image:
        radial-gradient(ellipse 80% 60% at 10% 20%, oklch(0.90 0.04 280 / 0.5) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 85% 70%, oklch(0.92 0.03 240 / 0.4) 0%, transparent 55%),
        linear-gradient(170deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
    background-attachment: fixed;
}

/* 微妙的点阵纹理 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(circle, oklch(0.75 0.01 260 / 0.03) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events: none;
    z-index: 0;
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* --- 顶部栏 --- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(1.3);
    -webkit-backdrop-filter: blur(20px) saturate(1.3);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent) 0%, oklch(0.55 0.12 285) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 2px 8px var(--accent-glow);
}

.logo-text {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.model-select-group,
.concurrency-group {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.model-select-group label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-left: 2px;
}

.model-select-wrap {
    position: relative;
}

.model-select-wrap select {
    appearance: none;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--radius-sm);
    padding: 7px 28px 7px 10px;
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    min-width: 170px;
}

.model-select-wrap::after {
    content: '';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid var(--text-faint);
    pointer-events: none;
}

.model-select-wrap select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.model-select-wrap select:hover {
    border-color: var(--text-faint);
}

.api-key-group {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.api-key-group label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-left: 2px;
}

.api-key-input-wrap {
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all var(--transition-fast);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.api-key-input-wrap:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.api-key-input-wrap input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    padding: 8px 12px;
    font-size: 12px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    width: 200px;
}

.api-key-input-wrap input::placeholder {
    color: var(--text-faint);
    font-family: var(--font-sans);
}

.api-key-toggle {
    background: none;
    border: none;
    padding: 8px 10px;
    cursor: pointer;
    color: var(--text-faint);
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

.api-key-toggle:hover {
    color: var(--text-secondary);
}

/* --- 主体 --- */
.main {
    flex: 1;
    max-width: 880px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 24px 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* --- 上传区域 --- */
.upload-zone {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border: 1.5px dashed oklch(0.7 0.02 260 / 0.35);
    border-radius: var(--radius-lg);
    padding: 52px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, oklch(1 0 0 / 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.upload-zone:hover {
    border-color: var(--accent);
    box-shadow: var(--glass-shadow-lg), 0 0 0 4px var(--accent-glow);
    transform: translateY(-1px);
}

.upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: var(--glass-shadow-lg), 0 0 0 6px var(--accent-glow);
    transform: scale(1.008);
}

.upload-inner {
    pointer-events: none;
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--text-faint);
    margin-bottom: 14px;
    transition: all var(--transition-base);
}

.upload-zone:hover .upload-icon {
    color: var(--accent);
    transform: translateY(-2px);
}

.upload-zone.drag-over .upload-icon {
    color: var(--accent);
    transform: translateY(-2px);
}

.upload-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.upload-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.upload-link {
    color: var(--accent);
    cursor: pointer;
    pointer-events: auto;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.upload-link:hover {
    border-bottom-color: var(--accent);
}

.upload-hint {
    font-size: 12px;
    color: var(--text-faint);
}

/* --- 文件列表区域 --- */
.file-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.file-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.file-actions-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.file-count {
    color: var(--text-faint);
    font-weight: 400;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* --- 文件行 --- */
.file-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px) saturate(1.1);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    box-shadow: var(--glass-shadow);
}

.file-row:hover {
    border-color: var(--glass-border-strong);
    box-shadow: var(--glass-shadow-lg);
    transform: translateY(-1px);
}

.file-row-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.file-icon {
    color: var(--accent);
    flex-shrink: 0;
    opacity: 0.8;
}

.file-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.005em;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-shrink: 0;
}

.file-meta-item {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.file-meta-item strong {
    color: var(--text-primary);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.file-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    min-width: 76px;
    justify-content: flex-end;
}

.status-done { color: var(--success); }
.status-error { color: var(--error); }
.status-processing { color: var(--warning); }
.status-pending { color: var(--text-faint); }

.file-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

/* --- 空状态 --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 56px 20px;
    color: var(--text-faint);
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
}

.empty-state svg {
    margin-bottom: 14px;
    opacity: 0.4;
}

.empty-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.empty-desc {
    font-size: 12px;
    color: var(--text-faint);
}

/* --- 进度条 --- */
.progress-bar {
    height: 3px;
    background: var(--glass-border);
    border-radius: 100px;
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.progress-bar.active {
    opacity: 1;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), oklch(0.55 0.12 285));
    border-radius: 100px;
    width: 0%;
    transition: width var(--transition-base);
}

/* --- 日志控制台 --- */
.log-section {
    background: var(--glass-bg);
    backdrop-filter: blur(12px) saturate(1.1);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
}

.log-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--glass-border);
    background: oklch(1 0 0 / 0.3);
}

.log-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.log-console {
    max-height: 150px;
    overflow-y: auto;
    padding: 10px 0;
    font-family: var(--font-mono);
    font-size: 11.5px;
    line-height: 1.8;
}

.log-entry {
    display: flex;
    gap: 12px;
    padding: 2px 16px;
}

.log-time {
    color: var(--text-faint);
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.log-text {
    color: var(--text-secondary);
}

.log-text.error { color: var(--error); }
.log-text.success { color: var(--success); }
.log-text.warn { color: var(--warning); }

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    padding: 8px 14px;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    color: white;
    font-weight: 600;
    box-shadow: 0 1px 4px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 2px 8px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-ghost {
    background: var(--glass-bg);
    color: var(--text-secondary);
    border-color: var(--glass-border-strong);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--glass-bg-strong);
    color: var(--text-primary);
    border-color: var(--text-faint);
}

.btn-sm {
    font-size: 12px;
    padding: 6px 10px;
}

.btn-xs {
    font-size: 11px;
    padding: 3px 8px;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-faint);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--accent-light);
}

.btn-icon:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-icon-danger:hover:not(:disabled) {
    color: var(--error);
    background: var(--error-light);
}

/* 旋转按钮 */
.btn-rotate {
    background: var(--glass-bg);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border-strong);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    min-width: 56px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-rotate:hover {
    background: var(--glass-bg-strong);
    color: var(--text-primary);
    border-color: var(--text-faint);
}

.btn-rotate.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    font-weight: 600;
    box-shadow: 0 1px 4px var(--accent-glow);
}

/* --- 弹窗 --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: oklch(0.15 0.01 260 / 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: 24px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(24px) saturate(1.3);
    -webkit-backdrop-filter: blur(24px) saturate(1.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 680px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--glass-shadow-lg), 0 24px 80px oklch(0.2 0.02 260 / 0.12);
    transform: scale(0.96) translateY(8px);
    transition: transform var(--transition-slow);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--glass-border);
}

.modal-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-faint);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--accent-light);
}

.modal-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--glass-border);
    padding: 0 22px;
}

.modal-tab {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    padding: 12px 18px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.modal-tab:hover {
    color: var(--text-secondary);
}

.modal-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.modal-body {
    flex: 1;
    overflow: auto;
    padding: 22px;
    min-height: 200px;
}

.preview-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    background: oklch(0.96 0.005 260);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    overflow: hidden;
}

.preview-container img {
    max-width: 100%;
    max-height: 50vh;
    object-fit: contain;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-faint);
    font-size: 13px;
}

.preview-placeholder svg {
    opacity: 0.35;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-top: 1px solid var(--glass-border);
    gap: 16px;
}

.rotate-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.rotate-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.rotate-buttons {
    display: flex;
    gap: 4px;
}

/* --- 旋转动画 --- */
.spin {
    animation: spin 1s linear infinite;
    transform-origin: center;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- 滚动条 --- */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--glass-border-strong);
    border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-faint);
}

/* --- 响应式 --- */
@media (max-width: 640px) {
    .header {
        padding: 10px 16px;
        flex-direction: column;
        gap: 10px;
    }

    .header-right {
        gap: 10px;
        flex-wrap: wrap;
    }

    .api-key-input-wrap input {
        width: 150px;
    }

    .main {
        padding: 20px 16px 36px;
    }

    .upload-zone {
        padding: 36px 20px;
    }

    .file-meta {
        gap: 10px;
    }

    .modal-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .rotate-controls {
        justify-content: center;
    }
}