/* ===== 设计 Token（深色主题） ===== */
:root {
    --c-primary: #6366F1;
    --c-primary-hover: #4F46E5;
    --c-primary-50: rgba(99,102,241,0.12);
    --c-primary-100: rgba(99,102,241,0.18);
    --c-text: #1E1B4B;
    --c-text-2: #4338CA;
    --c-text-3: #6366F1;
    --c-border: rgba(99,102,241,0.22);
    --c-bg: rgba(99,102,241,0.08);
    --c-success: #059669;
    --c-success-bg: rgba(5,150,105,0.12);
    --c-danger: #DC2626;
    --c-danger-bg: rgba(220,38,38,0.10);
    --c-warning: #D97706;
    --c-warning-bg: rgba(217,119,6,0.10);
    --radius-s: 10px;
    --radius-m: 14px;
    --radius-l: 18px;
    --shadow-1: 0 2px 12px rgba(0,0,0,0.25);
    --shadow-2: 0 8px 32px rgba(0,0,0,0.35);
    --glass-bg: rgba(255,255,255,0.88);
    --glass-border: rgba(255,255,255,0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    background-attachment: fixed;
    min-height: 100vh;
    padding: 0;
    color: var(--c-text);
    line-height: 1.6;
}

/* ===== 顶部导航 ===== */
.navbar {
    background: rgba(15,12,41,0.82);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(99,102,241,0.25);
    box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}
.navbar .brand {
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}
.navbar .brand .logo {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 700;
    box-shadow: 0 2px 10px rgba(99,102,241,0.5);
}
.navbar .brand .logo-img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    object-fit: cover;
    box-shadow: 0 2px 10px rgba(99,102,241,0.4);
}
.navbar .nav-links {
    display: flex;
    gap: 6px;
    align-items: center;
}
.navbar .nav-links a {
    color: rgba(255,255,255,0.65);
    text-decoration: none;
    font-size: 14px;
    padding: 7px 16px;
    border-radius: 999px;
    transition: all 0.2s;
}
.navbar .nav-links a:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}
.navbar .nav-links a.active,
.navbar .nav-links a.nav-link-active {
    background: rgba(99,102,241,0.25);
    color: #C7D2FE;
    font-weight: 600;
}
.navbar .nav-links a:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 2px;
}

/* ===== 主容器 ===== */
.container {
    max-width: 780px;
    margin: 0 auto;
    padding: 28px 16px 40px;
}

/* ===== 卡片（毛玻璃） ===== */
.card {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-l);
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.5);
    margin-bottom: 16px;
}
.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.card-title .icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--c-primary), #7C6BF5);
    border-radius: var(--radius-s);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    box-shadow: 0 3px 8px rgba(79,70,229,.30);
}

/* ===== 表单 ===== */
.form-row {
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
}
.form-item {
    flex: 1;
    margin-bottom: 18px;
}
.form-item label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text-2);
}
select, input[type="text"], input[type="email"], input[type="password"], textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid rgba(99,102,241,0.25);
    border-radius: var(--radius-s);
    font-size: 14px;
    color: var(--c-text);
    background: rgba(255,255,255,0.6);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}
select {
    background: rgba(255,255,255,0.6) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236366F1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") no-repeat right 12px center;
    padding-right: 36px;
}
select:focus, input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus, textarea:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.2), 0 0 12px rgba(99,102,241,0.15);
    background-color: rgba(255,255,255,0.85);
}
textarea {
    resize: vertical;
    min-height: 60px;
}

/* ===== 上传区域 ===== */
.upload-area {
    border: 2px dashed rgba(99,102,241,0.4);
    border-radius: var(--radius-m);
    padding: 36px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    background: rgba(99,102,241,0.05);
    position: relative;
    overflow: hidden;
    animation: uploadBreath 3s ease-in-out infinite;
}
@keyframes uploadBreath {
    0%, 100% { border-color: rgba(99,102,241,0.35); }
    50% { border-color: rgba(139,92,246,0.6); }
}
.upload-area:hover, .upload-area.dragover {
    border-color: var(--c-primary);
    background: rgba(99,102,241,0.12);
    animation: none;
    box-shadow: 0 0 20px rgba(99,102,241,0.2);
}
.upload-area .upload-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 10px;
    border-radius: 50%;
    background: var(--c-primary-50);
    display: flex;
    align-items: center;
    justify-content: center;
}
.upload-area .upload-icon svg {
    width: 20px;
    height: 20px;
}
.upload-area .upload-text {
    font-size: 14px;
    color: var(--c-text);
}
.upload-area .upload-hint {
    font-size: 12px;
    color: var(--c-text-3);
    margin-top: 3px;
}
.upload-area.has-file {
    border-style: solid;
    border-color: var(--c-primary);
    padding: 12px;
    min-height: 34vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
/* 上传区删除小叉叉：选中图片后出现在预览图右上角 */
.upload-area .upload-clear {
    display: none;
    position: absolute;
    top: 8px;
    right: 8px;
    width: 26px;
    height: 26px;
    line-height: 24px;
    text-align: center;
    border-radius: 50%;
    background: var(--c-danger, #dc2626);
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    z-index: 5;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    user-select: none;
}
.upload-area.has-file .upload-clear {
    display: block;
}
.upload-area .upload-clear:hover {
    background: #b91c1c;
}
#preview, #g_preview, #entry_preview, #m_preview, #e_preview {
    max-width: 100%;
    max-height: 60vh;
    width: auto;
    object-fit: contain;
    border-radius: var(--radius-s);
    display: none;
    margin: 0 auto;
}
.file-name {
    font-size: 12px;
    color: var(--c-primary);
    margin-top: 8px;
    word-break: break-all;
}

/* ===== 按钮系统（4 变体 × 2 尺寸）===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    border-radius: var(--radius-s);
    transition: all 0.2s;
    font-size: 15px;
    text-decoration: none;
}
.btn:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 2px;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 主要操作 */
.btn-primary {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,0.35);
}
.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    box-shadow: 0 6px 20px rgba(99,102,241,0.55);
    transform: translateY(-2px);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

/* 次要操作（描边） */
.btn-outline {
    background: #fff;
    color: var(--c-primary);
    border: 1.5px solid var(--c-primary);
}
.btn-outline:hover:not(:disabled) {
    background: var(--c-primary-50);
}

/* 删除（危险） */
.btn-danger-o {
    background: #fff;
    color: var(--c-danger);
    border: 1px solid #F0B9B4;
}
.btn-danger-o:hover:not(:disabled) {
    background: var(--c-danger-bg);
}

/* 文字按钮 */
.btn-ghost {
    background: transparent;
    color: var(--c-primary);
    border: 1px solid var(--c-border);
}
.btn-ghost:hover:not(:disabled) {
    background: var(--c-primary-50);
    border-color: var(--c-primary);
}

/* 全宽块级 */
.btn-block {
    width: 100%;
    padding: 13px;
    font-size: 15px;
}

/* 小尺寸 */
.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
    border-radius: 6px;
}

/* ===== 兼容旧 class 映射 ===== */
.btn-search {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    border: none;
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-s);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 6px;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.btn-search:hover {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(99,102,241,0.5);
}

.btn-export-pdf {
    width: 100%;
    padding: 10px;
    background: #fff;
    color: var(--c-primary);
    border: 1.5px solid var(--c-primary);
    border-radius: var(--radius-s);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 6px;
    transition: all 0.2s;
}
.btn-export-pdf:hover {
    background: var(--c-primary-50);
}

/* 导出PDF + 打印 同行布局 */
.nb-actions {
    display: flex;
    gap: 10px;
    margin-top: 6px;
}
.nb-actions .btn-export-pdf,
.nb-actions .btn-print {
    flex: 1;
    width: auto;
    margin-top: 0;
}
.btn-print {
    padding: 10px;
    background: var(--c-primary);
    color: #fff;
    border: 1.5px solid var(--c-primary);
    border-radius: var(--radius-s);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-print:hover {
    background: #4F46E5;
}

.btn-secondary {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius-s);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.btn-secondary:hover {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    box-shadow: 0 4px 14px rgba(99,102,241,0.45);
}
.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-solve {
    background: var(--c-primary-50);
    color: var(--c-primary);
    border: 1px solid var(--c-primary);
    padding: 5px 14px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    margin-top: 8px;
    transition: all 0.2s;
}
.btn-solve:hover {
    background: var(--c-primary);
    color: #fff;
}
.btn-solve:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-solve-collapse {
    padding: 2px 8px;
    font-size: 12px;
    border: none;
    background: none;
    color: var(--c-text-3);
    text-decoration: underline;
}
.btn-solve-collapse:hover {
    background: none;
    color: var(--c-primary);
}

.btn-remove {
    padding: 5px 14px;
    font-size: 13px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    background: #fff;
    color: var(--c-danger);
    cursor: pointer;
    transition: all 0.2s;
}
.btn-remove:hover {
    background: var(--c-danger-bg);
    border-color: #F0B9B4;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 36px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    border: none;
    border-radius: var(--radius-s);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(99,102,241,0.35);
}
.btn-download:hover {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99,102,241,0.55);
}

.btn-confirm {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: var(--radius-s);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.btn-confirm:hover:not(:disabled) {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(99,102,241,0.5);
}
.btn-confirm:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-merge {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--c-warning-bg);
    border-radius: var(--radius-s);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--c-warning-bg);
    color: var(--c-warning);
}
.btn-merge:hover:not(:disabled) {
    background: var(--c-warning);
    color: #fff;
}
.btn-merge:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== AI 解答区域 ===== */
.q-solve {
    margin-top: 12px;
    padding: 14px 16px;
    background: rgba(99,102,241,0.06);
    border-left: 3px solid var(--c-primary);
    border-radius: 0 var(--radius-s) var(--radius-s) 0;
    font-size: 15px;
    line-height: 1.8;
    overflow-x: auto;
    overflow-wrap: break-word;
    word-break: break-word;
}
.q-solve *,
.q-solve li,
.q-solve ol,
.q-solve ul,
.q-solve blockquote {
    border-left: none !important;
}
.q-solve h3 {
    font-size: 16px;
    margin: 12px 0 6px;
    color: var(--c-text);
}
.q-solve p {
    margin: 6px 0;
}
.q-solve .katex-display {
    overflow-x: auto;
    max-width: 100%;
    padding: 4px 0;
}
.q-solve .katex {
    font-size: 1.3em;
}
.q-solve .katex-display .katex {
    font-size: 1.1em;
}
.q-solve table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0;
}
.q-solve th,
.q-solve td {
    border: 1px solid #ddd;
    padding: 6px 8px;
    font-size: 14px;
    text-align: left;
}
.q-solve ul,
.q-solve ol {
    padding-left: 20px;
    margin: 6px 0;
}
.q-solve pre {
    background: #eee;
    padding: 10px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 13px;
}
.q-solve code {
    background: #eee;
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 0.9em;
}
.q-btn-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

/* ===== 结果区域 ===== */
.result-card {
    display: none;
    animation: fadeUp 0.4s ease;
}
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.result-header .title {
    font-size: 16px;
    font-weight: 700;
    color: var(--c-text);
}

/* 状态徽章 */
.badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success {
    background: var(--c-success-bg);
    color: var(--c-success);
}
.badge-error {
    background: var(--c-danger-bg);
    color: var(--c-danger);
}
.badge-warning {
    background: var(--c-warning-bg);
    color: var(--c-warning);
}

/* 统计条 */
.result-stats {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
}
.stat-box {
    flex: 1;
    text-align: center;
    padding: 14px 8px;
    background: rgba(99,102,241,0.06);
    border: 1px solid rgba(99,102,241,0.12);
    border-radius: var(--radius-m);
}
.stat-box .num {
    font-size: 26px;
    font-weight: 700;
    color: var(--c-primary);
}
.stat-box .num.stat-correct { color: var(--c-success); }
.stat-box .num.stat-wrong { color: var(--c-danger); }
.stat-box .num.stat-unknown { color: var(--c-warning); }
.stat-box .label {
    font-size: 12px;
    color: var(--c-text-3);
    margin-top: 2px;
}

/* 错题列表 */
.error-list {
    list-style: none;
}
.error-list li {
    padding: 12px 14px;
    background: rgba(99,102,241,0.04);
    border-radius: 0 var(--radius-s) var(--radius-s) 0;
    margin-bottom: 8px;
    border-left: 3px solid var(--c-border);
}
.error-list .q-no {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text-2);
    margin-bottom: 4px;
}
.error-list .q-content {
    font-size: 13px;
    color: var(--c-text-2);
    line-height: 1.6;
    margin-bottom: 4px;
}
.error-list .q-type {
    font-size: 12px;
    color: var(--c-text-3);
}
.error-list .q-img {
    margin: 8px 0;
}
.error-list .q-img img {
    max-width: 100%;
    max-height: 200px;
    border-radius: 6px;
    border: 1px solid var(--c-border);
    cursor: pointer;
}

.raw-json {
    margin-top: 14px;
    padding: 12px;
    background: rgba(99,102,241,0.05);
    border-radius: var(--radius-s);
    font-size: 12px;
    color: var(--c-text-2);
    max-height: 200px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}
.raw-toggle {
    font-size: 13px;
    color: var(--c-primary);
    cursor: pointer;
    margin-top: 10px;
    text-align: center;
}

/* ===== Loading / 分步进度 ===== */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 3000;   /* 高于试卷预览弹层，保证在弹层内操作时能看到进度 */
    justify-content: center;
    align-items: center;
}
.loading-overlay.show {
    display: flex;
}
.loading-box {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-l);
    padding: 32px 40px;
    text-align: center;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.3);
}
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--c-border);
    border-top-color: var(--c-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.loading-box p {
    font-size: 14px;
    color: var(--c-text-2);
}

/* 分步进度组件 */
.steps-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-l);
    padding: 20px 24px;
    margin-bottom: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.5);
}
.step-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 7px 0;
    font-size: 14px;
    color: var(--c-text-3);
}
.step-item .step-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--c-border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.step-item.done {
    color: var(--c-text-2);
}
.step-item.done .step-dot {
    border-color: var(--c-success);
    background: var(--c-success-bg);
}
.step-item.done .step-dot::after {
    content: "";
    width: 8px;
    height: 5px;
    border-left: 2px solid var(--c-success);
    border-bottom: 2px solid var(--c-success);
    transform: rotate(-45deg) translate(1px, -1px);
}
.step-item.doing {
    color: var(--c-primary);
    font-weight: 600;
}
.step-item.doing .step-dot {
    border-color: var(--c-primary);
}
.step-item.doing .step-dot::after {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-primary);
    animation: pulse 1s infinite;
}
@keyframes pulse {
    50% { opacity: 0.3; }
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--c-text);
    color: #fff;
    padding: 10px 24px;
    border-radius: var(--radius-s);
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 3100;   /* 高于预览弹层，弹层内的操作提示也能正常显示 */
    pointer-events: none;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== 错题本 ===== */
.notebook-filter {
    background: rgba(99,102,241,0.08);
    border: 1px solid rgba(99,102,241,0.15);
    border-radius: var(--radius-m);
    padding: 20px;
    margin-bottom: 20px;
}
.notebook-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--c-text-3);
}
.notebook-empty .empty-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 8px;
    border-radius: 50%;
    background: var(--c-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}
.notebook-empty .empty-icon svg {
    width: 22px;
    height: 22px;
}
.notebook-empty .empty-text {
    font-size: 13px;
    color: var(--c-text-2);
}
.notebook-empty .empty-sub {
    font-size: 12px;
    color: var(--c-text-3);
    margin: 2px 0 10px;
}

.nb-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding: 8px 0;
}
.nb-page-btn {
    padding: 6px 16px;
    font-size: 13px;
    border: 1px solid var(--c-primary);
    border-radius: 6px;
    background: #fff;
    color: var(--c-primary);
    cursor: pointer;
    transition: all 0.2s;
}
.nb-page-btn:hover:not(:disabled) {
    background: var(--c-primary);
    color: #fff;
}
.nb-page-btn:disabled {
    border-color: var(--c-border);
    color: var(--c-text-3);
    cursor: not-allowed;
}
.nb-page-info {
    font-size: 13px;
    color: var(--c-text-2);
}

/* ===== 我的试卷库 ===== */
.papers-tip {
    font-size: 13px;
    color: var(--c-text-3);
    margin: -6px 0 16px;
}
.paper-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}
.paper-item {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-m);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: box-shadow 0.2s, transform 0.2s;
}
.paper-item:hover {
    box-shadow: 0 6px 18px rgba(99,102,241,0.15);
    transform: translateY(-2px);
}
.paper-thumb {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: var(--c-bg);
    cursor: pointer;
    display: block;
}
.paper-meta {
    padding: 10px 12px 4px;
}
.paper-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.paper-date {
    font-size: 12px;
    color: var(--c-text-3);
    margin-top: 2px;
}
.paper-tag-erased {
    margin-left: 6px;
    padding: 1px 6px;
    font-size: 11px;
    border-radius: 4px;
    background: var(--c-primary-50, rgba(99,102,241,0.12));
    color: var(--c-primary);
}

/* --- 预览弹层：顶部悬浮操作条 --- */
.paper-viewer {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0,0,0,0.82);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 68px 24px 24px;
    cursor: zoom-out;
}
.paper-viewer img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.paper-viewer-bar {
    position: absolute;
    top: 0; left: 0; right: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    padding-top: calc(12px + env(safe-area-inset-top));
    background: linear-gradient(180deg, rgba(0,0,0,0.72), rgba(0,0,0,0));
    cursor: default;
}
.pv-title {
    flex: 1;
    min-width: 0;
    color: rgba(255,255,255,0.86);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pv-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}
.pv-btn {
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.32);
    background: rgba(255,255,255,0.14);
    color: #fff;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.pv-btn:hover { background: rgba(255,255,255,0.28); }
.pv-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.pv-btn-toggle.active {
    background: #fff;
    color: var(--c-primary);
    border-color: #fff;
}
.pv-btn-erase {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    border-color: transparent;
}
.pv-btn-erase:hover { background: linear-gradient(135deg, #4F46E5, #7C3AED); }
.pv-btn-save {
    background: linear-gradient(135deg, #10B981, #059669);
    border-color: transparent;
}
.pv-btn-save:hover { background: linear-gradient(135deg, #059669, #047857); }
.pv-btn-remove:hover {
    background: var(--c-danger);
    border-color: var(--c-danger);
    color: #fff;
}
.pv-close {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255,255,255,0.16);
    color: #fff;
    font-size: 17px;
    line-height: 1;
    cursor: pointer;
}
.pv-close:hover { background: rgba(255,255,255,0.3); }
@media (max-width: 480px) {
    .paper-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
    .paper-thumb { height: 120px; }
    .paper-viewer { padding: 76px 10px 10px; }
    .pv-title { display: none; }
    .pv-btn { padding: 6px 12px; font-size: 12px; }
}

/* ===== AI阅卷结果 ===== */
.grading-item {
    border-left-color: var(--c-success);
}
.grading-item.wrong {
    border-left-color: var(--c-danger);
}
.grading-item.unknown {
    border-left-color: var(--c-warning);
}
.grading-status {
    font-size: 12px;
    font-weight: 600;
    margin-left: 8px;
}
.grading-status.right {
    color: var(--c-success);
}
.grading-status.wrong {
    color: var(--c-danger);
}
.grading-status.unknown {
    color: var(--c-warning);
}

/* ===== 登录/注册 ===== */
.auth-card {
    max-width: 400px;
    margin: 60px auto;
    padding: 32px 28px;
}
.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 28px;
    background: rgba(99,102,241,0.08);
    border: 1px solid rgba(99,102,241,0.12);
    border-radius: var(--radius-m);
    padding: 4px;
}
.auth-tab {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    color: var(--c-text-3);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.3s;
}
.auth-tab.active {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: #fff;
    box-shadow: 0 2px 10px rgba(99,102,241,0.4);
}
.auth-tab:hover:not(.active) {
    background: rgba(99,102,241,0.1);
    color: var(--c-primary);
}
#loginForm, #registerForm, #smsForm {
    animation: fadeUp 0.4s ease;
}

/* ===== 短信登录 ===== */
.sms-code-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}
.sms-code-input {
    flex: 1;
}
.btn-sms-send {
    flex-shrink: 0;
    padding: 0 16px;
    border: 1.5px solid var(--c-primary);
    border-radius: var(--radius-s);
    background: transparent;
    color: var(--c-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}
.btn-sms-send:hover:not(:disabled) {
    background: var(--c-primary);
    color: #fff;
}
.btn-sms-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.sms-tip {
    text-align: center;
    font-size: 12px;
    color: var(--c-text-3);
    margin-top: 12px;
    opacity: 0.8;
}
input[type="tel"] {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid rgba(99,102,241,0.25);
    border-radius: var(--radius-s);
    font-size: 14px;
    color: var(--c-text);
    background: rgba(255,255,255,0.6);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}
input[type="tel"]:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.2), 0 0 12px rgba(99,102,241,0.15);
    background-color: rgba(255,255,255,0.85);
}

/* ===== 个人中心 ===== */
.mine-user-row {
    background: none !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 4px 0 8px !important;
    margin-bottom: 0;
    cursor: default;
}
.mine-user-row:hover {
    background: none !important;
    transform: none !important;
    border-color: transparent !important;
}
.mine-user-row .mine-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), #7C6BF5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 2px 6px rgba(79,70,229,.25);
    flex-shrink: 0;
    margin-right: 10px;
}
.mine-username-text {
    font-size: 17px;
    font-weight: 700;
}
.mine-menu {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.mine-menu-item {
    display: flex;
    align-items: center;
    padding: 16px 18px;
    background: rgba(99,102,241,0.06);
    border: 1px solid rgba(99,102,241,0.1);
    border-radius: var(--radius-m);
    cursor: pointer;
    transition: all 0.2s;
}
.mine-menu-item:hover {
    background: rgba(99,102,241,0.12);
    transform: translateX(4px);
    border-color: rgba(99,102,241,0.2);
}
.mine-menu-item-disabled {
    cursor: default;
    opacity: 0.6;
}
.mine-menu-item-disabled:hover {
    background: var(--c-primary-50);
    transform: none;
}
.mine-menu-icon {
    font-size: 22px;
    margin-right: 14px;
}
.mine-menu-text {
    flex: 1;
    font-size: 15px;
    font-weight: 600;
    color: var(--c-text);
}
.mine-menu-arrow {
    font-size: 20px;
    color: var(--c-text-3);
}
.mine-menu-tag {
    font-size: 12px;
    color: var(--c-text-3);
    background: var(--c-border);
    padding: 3px 10px;
    border-radius: 10px;
}
.mine-logout-btn {
    width: 100%;
    padding: 14px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(220,38,38,0.2);
    border-radius: var(--radius-m);
    color: var(--c-danger);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    margin-top: 16px;
}
.mine-logout-btn:hover {
    background: var(--c-danger-bg);
    border-color: rgba(220,38,38,0.35);
}

/* ===== 笔记清除结果 ===== */
#e_preview {
    max-width: 100%;
    max-height: 240px;
    border-radius: var(--radius-s);
    display: none;
    margin: 0 auto;
}
.erase-result-body {
    text-align: center;
}
.erase-img-wrap {
    margin-bottom: 20px;
}
.erase-img-wrap img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 10px;
    border: 1px solid var(--c-border);
}

/* ===== 智能切题 ===== */
#c_preview {
    max-width: 100%;
    max-height: 240px;
    border-radius: var(--radius-s);
    display: none;
    margin: 0 auto;
}
.cut-tip {
    font-size: 13px;
    color: var(--c-text-3);
    text-align: center;
    margin-bottom: 16px;
}
.cut-canvas-wrap {
    position: relative;
    display: block;
    width: 100%;
    text-align: center;
    overflow: hidden;
}
.cut-canvas-wrap img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius-s);
    border: 1px solid var(--c-border);
    margin: 0 auto;
}
.cut-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.cut-box {
    position: absolute;
    border: 2px solid var(--c-primary);
    background: rgba(79,70,229,0.08);
    border-radius: 6px;
    cursor: pointer;
    pointer-events: all;
    transition: all 0.2s;
}
.cut-box:hover {
    background: rgba(79,70,229,0.15);
}
.cut-box.selected {
    border-color: var(--c-success);
    background: rgba(20,122,61,0.1);
    border-width: 2.5px;
}
.cut-box-label {
    position: absolute;
    top: -10px;
    left: 6px;
    background: var(--c-primary);
    color: #fff;
    font-size: 11px;
    padding: 1px 8px;
    border-radius: var(--radius-s);
    font-weight: 600;
    line-height: 16px;
}
.cut-box.selected .cut-box-label {
    background: var(--c-success);
}
.cut-box-add {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--c-primary);
    background: rgba(255,255,255,0.9);
    color: var(--c-primary);
    font-size: 20px;
    font-weight: 700;
    line-height: 28px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}
.cut-box-add:hover {
    background: var(--c-primary);
    color: #fff;
}
.cut-box.selected .cut-box-add {
    border-color: var(--c-success);
    color: var(--c-success);
}
.cut-box.selected .cut-box-add:hover {
    background: var(--c-success);
    color: #fff;
}
.cut-box-handle {
    position: absolute;
    z-index: 10;
    touch-action: none;
}
.cut-box-handle.top {
    top: -12px; left: 0; right: 0; height: 24px;
    cursor: n-resize;
}
.cut-box-handle.bottom {
    bottom: -12px; left: 0; right: 0; height: 24px;
    cursor: s-resize;
}
.cut-box-handle.left {
    left: -12px; top: 0; bottom: 0; width: 24px;
    cursor: w-resize;
}
.cut-box-handle.right {
    right: -12px; top: 0; bottom: 0; width: 24px;
    cursor: e-resize;
}
.cut-actions {
    margin-top: 20px;
}
.cut-selected-info {
    text-align: center;
    font-size: 14px;
    color: var(--c-text-2);
    font-weight: 600;
    margin-bottom: 12px;
}
.cut-btn-row {
    display: flex;
    gap: 12px;
}

/* ===== 错题录入 ===== */
.entry-tip {
    font-size: 13px;
    color: var(--c-text-3);
    margin-bottom: 8px;
    text-align: center;
}
.entry-btn-row {
    display: flex;
    flex-direction: row;
    gap: 16px;
    margin-top: 8px;
}
.entry-btn-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.entry-btn-col .btn-primary,
.entry-btn-col .btn-secondary {
    width: 100%;
    min-height: 44px;
    padding: 12px 20px;
    font-size: 15px;
}
.entry-progress {
    margin-top: 16px;
    padding: 16px;
    background: rgba(99,102,241,0.05);
    border-radius: 10px;
    border: 1px solid rgba(99,102,241,0.12);
}
.progress-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 12px;
}
.progress-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    margin-bottom: 6px;
    border-radius: 6px;
    font-size: 13px;
    background: #fff;
    border: 1px solid var(--c-border);
    transition: all 0.3s;
}
.progress-item.processing {
    border-color: var(--c-primary);
    background: var(--c-primary-50);
}
.progress-item.success {
    border-color: var(--c-success);
    background: var(--c-success-bg);
}
.progress-item.error {
    border-color: var(--c-danger);
    background: var(--c-danger-bg);
}

/* ===== 原卷批改覆盖层 ===== */
.paper-overlay {
    position: relative;
    margin-top: 16px;
    border-radius: var(--radius-m);
    overflow: hidden;
    background: rgba(99,102,241,0.04);
    box-shadow: 0 2px 12px rgba(0,0,0,.15);
    border: 1px solid rgba(99,102,241,0.1);
}
.paper-overlay img {
    display: block;
    max-width: 100%;
    max-height: calc(100vh - 230px);
    width: auto;
    height: auto;
    margin: 0 auto;
}
.paper-overlay .qbox {
    position: absolute;
    border: 3px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.15s;
}
.paper-overlay .qbox:hover {
    box-shadow: 0 0 0 3px rgba(79,70,229,0.3);
    z-index: 5;
}
.paper-overlay .qbox.st-correct {
    border-color: rgba(20,122,61,.75);
    background: rgba(20,122,61,.07);
}
.paper-overlay .qbox.st-wrong {
    border-color: rgba(180,35,24,.75);
    background: rgba(180,35,24,.07);
}
.paper-overlay .qbox.st-partial {
    border-color: rgba(200,120,10,.8);
    background: rgba(200,120,10,.08);
}
.paper-overlay .qbox.st-unknown {
    border-color: rgba(100,100,130,.65);
    background: rgba(100,100,130,.06);
    border-style: dashed;
}
.paper-overlay .mark-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    filter: drop-shadow(1px 2px 4px rgba(0,0,0,.18));
}
.paper-overlay .qnum-badge {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--c-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    display: grid;
    place-items: center;
    pointer-events: none;
    box-shadow: 0 2px 6px rgba(79,70,229,.5);
    z-index: 3;
}
.paper-overlay .legend {
    display: flex;
    gap: 14px;
    justify-content: center;
    padding: 10px 0;
    font-size: 12px;
    color: var(--c-text-2);
}
.paper-overlay .legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    border: 2px solid;
    display: inline-block;
    vertical-align: middle;
    margin-right: 4px;
}

/* ===== 只读结果覆盖层（AI阅卷） ===== */
.paper-stage {
    position: relative;
    display: block;
    width: -moz-fit-content;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto;
}

/* ===== 底部标签栏（移动端） ===== */
.tabbar {
    display: none;
}

/* ===== 动画 ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 中间断点 768px ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 10px 16px;
    }
    .navbar .nav-links a {
        font-size: 13px;
        padding: 6px 12px;
    }
    .container {
        padding: 0 12px 32px;
        margin-top: 16px;
    }
}

/* ===== 移动端 480px ===== */
@media (max-width: 480px) {
    .navbar .nav-links {
        display: none;
    }
    .navbar .brand {
        font-size: 15px;
        gap: 8px;
    }
    .navbar .brand .logo-img {
        width: 30px;
        height: 30px;
    }
    .navbar {
        padding: 8px 12px;
    }
    .container {
        padding: 0 10px 80px;
        margin-top: 12px;
    }
    .card {
        padding: 18px 14px;
        border-radius: 14px;
    }
    .card-title {
        font-size: 17px;
    }
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    .form-row.subjects-row {
        flex-direction: row;
        gap: 12px;
    }
    .form-row .form-item {
        margin-bottom: 18px;
    }
    .form-row.subjects-row .form-item {
        margin-bottom: 0;
    }
    .upload-area {
        padding: 24px 12px;
    }
    .upload-area .upload-icon {
        width: 36px;
        height: 36px;
    }
    .result-stats {
        flex-wrap: nowrap;
        gap: 6px;
    }
    .stat-box {
        min-width: 0;
        padding: 10px 4px;
    }
    .stat-box .num {
        font-size: 20px;
    }
    .notebook-stat-item {
        min-width: 70px;
    }
    .q-solve {
        padding: 12px 14px;
        font-size: 14px;
        line-height: 1.7;
    }
    .q-solve .katex {
        font-size: 1.0em;
    }
    .q-solve .katex-display {
        font-size: 1.0em;
    }
    .q-solve ul,
    .q-solve ol {
        padding-left: 16px;
    }
    .entry-btn-row {
        flex-direction: column;
        gap: 12px;
    }
    /* 登录/注册卡片紧凑化，小屏免滚动即可点到底部按钮 */
    .auth-card {
        margin: 20px auto;
        padding: 24px 18px;
    }
    .auth-tabs {
        margin-bottom: 18px;
    }

    /* 底部标签栏 */
    .tabbar {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(15,12,41,0.88);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        border-top: 1px solid rgba(99,102,241,0.25);
        box-shadow: 0 -4px 24px rgba(0,0,0,0.4);
        padding: 8px 0 10px;
        z-index: 100;
    }
    .tabbar .tab {
        flex: 1;
        text-align: center;
        font-size: 10px;
        color: rgba(255,255,255,0.5);
        cursor: pointer;
        text-decoration: none;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
        transition: color 0.2s;
    }
    .tabbar .tab svg {
        width: 20px;
        height: 20px;
    }
    .tabbar .tab.active {
        color: #C7D2FE;
        font-weight: 600;
    }
}

/* ========== 复习闭环 ========== */
.review-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.rs-item {
    background: var(--c-primary-50);
    border-radius: 12px;
    padding: 16px 8px;
    text-align: center;
}
.rs-num {
    font-size: 24px;
    font-weight: 700;
    color: var(--c-primary-hover);
    line-height: 1.2;
}
.rs-label {
    font-size: 12px;
    color: #6B7280;
    margin-top: 4px;
}
.rv-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.rv-kp {
    background: var(--c-primary-50);
    color: var(--c-primary-hover);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 12px;
    font-weight: 600;
}
.rv-tag {
    background: var(--c-success-bg);
    color: var(--c-success);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 12px;
}
.rv-sub {
    font-size: 12px;
    color: #9CA3AF;
    margin: 4px 0 6px;
}
.rv-preview {
    max-height: 120px;
    overflow: hidden;
    position: relative;
}

/* 重做弹层 */
.redo-overlay {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    padding: 16px;
}
.redo-modal {
    background: #fff;
    border-radius: 16px;
    width: 100%;
    max-width: 560px;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}
.redo-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid #EEF0F6;
}
.redo-title {
    font-size: 16px;
    font-weight: 700;
    color: #1F2937;
}
.redo-close {
    cursor: pointer;
    color: #9CA3AF;
    font-size: 18px;
    line-height: 1;
}
.redo-body {
    padding: 18px;
    overflow-y: auto;
    flex: 1;
}
.redo-q {
    font-size: 15px;
    line-height: 1.8;
    color: #374151;
}
.redo-body .q-img img {
    max-width: 100%;
    border-radius: 8px;
    margin: 8px 0;
}
.redo-actions {
    display: flex;
    gap: 12px;
    padding: 14px 18px;
    border-top: 1px solid #EEF0F6;
}
.redo-btn {
    flex: 1;
    padding: 12px;
    border-radius: 10px;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}
.redo-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.redo-btn-yes {
    background: var(--c-success);
    color: #fff;
}
.redo-btn-no {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    border: 1.5px solid var(--c-danger);
}
.redo-result {
    padding: 16px 18px;
    border-top: 1px solid #EEF0F6;
    overflow-y: auto;
}
.redo-result-head {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
}
.redo-result-head.ok { color: var(--c-success); }
.redo-result-head.no { color: var(--c-danger); }
.redo-result-meta {
    font-size: 13px;
    color: #6B7280;
    line-height: 1.7;
    margin-bottom: 8px;
}
.redo-reason {
    font-size: 13px;
    color: #374151;
    line-height: 1.7;
    background: #F6F7FB;
    border-radius: 8px;
    padding: 10px 12px;
}

@media (max-width: 640px) {
    .review-stats { grid-template-columns: repeat(2, 1fr); }
}