/* ============================================
 * Semi Design System — CSS Variables & Reset
 * Shared foundation for all admin pages.
 * ============================================ */

:root {
    /* --- Semantic Colors (Light) --- */
    --semi-color-primary: #0064FA;
    --semi-color-primary-hover: #0053D1;
    --semi-color-primary-active: #0042A8;
    --semi-color-primary-light-default: rgba(0, 100, 250, 0.08);
    --semi-color-primary-light-hover: rgba(0, 100, 250, 0.12);
    --semi-color-primary-light-active: rgba(0, 100, 250, 0.16);
    --semi-color-secondary: #0095EE;
    --semi-color-secondary-hover: #007EC8;
    --semi-color-secondary-active: #0067A3;
    --semi-color-tertiary: #6B7075;
    --semi-color-tertiary-hover: #52565A;
    --semi-color-tertiary-active: #3C3F42;
    --semi-color-success: #3BB346;
    --semi-color-success-hover: #33993D;
    --semi-color-success-active: #2B8033;
    --semi-color-warning: #FC8800;
    --semi-color-warning-hover: #D67300;
    --semi-color-warning-active: #B35F00;
    --semi-color-danger: #F93920;
    --semi-color-danger-hover: #D62F1A;
    --semi-color-danger-active: #B32615;
    --semi-color-danger-light-default: rgba(249, 57, 32, 0.08);
    --semi-color-danger-light-hover: rgba(249, 57, 32, 0.12);
    --semi-color-danger-light-active: rgba(249, 57, 32, 0.16);
    --semi-color-info: #0064FA;
    --semi-color-info-hover: #0053D1;
    --semi-color-info-active: #0042A8;
    --semi-color-info-light-default: rgba(0, 100, 250, 0.08);
    --semi-color-success-light-default: rgba(59, 179, 70, 0.08);
    --semi-color-warning-light-default: rgba(252, 136, 0, 0.08);

    /* --- Backgrounds & Surfaces (Light) --- */
    --semi-color-bg-0: #FFFFFF;
    --semi-color-bg-1: #FFFFFF;
    --semi-color-bg-2: #FFFFFF;
    --semi-color-bg-3: #FFFFFF;
    --semi-color-fill-0: rgba(46, 50, 56, 0.05);
    --semi-color-fill-1: rgba(46, 50, 56, 0.09);
    --semi-color-fill-2: rgba(46, 50, 56, 0.13);

    /* --- Text (Light) --- */
    --semi-color-text-0: #1C1F23;
    --semi-color-text-1: rgba(28, 31, 35, 0.8);
    --semi-color-text-2: rgba(28, 31, 35, 0.62);
    --semi-color-text-3: rgba(28, 31, 35, 0.35);
    --semi-color-disabled-text: rgba(28, 31, 35, 0.35);

    /* --- Borders (Light) --- */
    --semi-color-border: rgba(28, 31, 35, 0.08);
    --semi-color-focus-border: #0064FA;
    --semi-color-disabled-border: #E6E8EA;

    /* --- Disabled (Light) --- */
    --semi-color-disabled-bg: #E6E8EA;

    /* --- Border Radius --- */
    --semi-border-radius-extra-small: 3px;
    --semi-border-radius-small: 3px;
    --semi-border-radius-medium: 6px;
    --semi-border-radius-large: 12px;
    --semi-border-radius-circle: 50%;
    --semi-border-radius-full: 9999px;

    /* --- Typography --- */
    --semi-font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;

    /* --- Icon --- */
    --semi-icon-size-medium: 16px;

    /* --- Spacing (4px base) --- */
    --sp-xxs: 2px;
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 12px;
    --sp-lg: 16px;
    --sp-xl: 20px;
    --sp-2xl: 24px;
    --sp-3xl: 32px;
}

/* ============================================
 * Dark Mode
 * ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --semi-color-primary: #54A9FF;
        --semi-color-primary-hover: #7DBEFF;
        --semi-color-primary-active: #A6D4FF;
        --semi-color-primary-light-default: rgba(84, 169, 255, 0.18);
        --semi-color-primary-light-hover: rgba(84, 169, 255, 0.24);
        --semi-color-primary-light-active: rgba(84, 169, 255, 0.3);
        --semi-color-secondary: #40B4F3;
        --semi-color-secondary-hover: #66C4F5;
        --semi-color-secondary-active: #8DD4F8;
        --semi-color-tertiary: #888D92;
        --semi-color-tertiary-hover: #A0A4A9;
        --semi-color-tertiary-active: #B8BBBF;
        --semi-color-success: #5DC264;
        --semi-color-success-hover: #7DCF82;
        --semi-color-success-active: #9DDBA1;
        --semi-color-warning: #FFAE43;
        --semi-color-warning-hover: #FFBE68;
        --semi-color-warning-active: #FFCE8D;
        --semi-color-danger: #FC725A;
        --semi-color-danger-hover: #FD9582;
        --semi-color-danger-active: #FDB8AB;
        --semi-color-danger-light-default: rgba(252, 114, 90, 0.2);
        --semi-color-danger-light-hover: rgba(252, 114, 90, 0.26);
        --semi-color-danger-light-active: rgba(252, 114, 90, 0.32);
        --semi-color-info: #54A9FF;
        --semi-color-info-hover: #7DBEFF;
        --semi-color-info-active: #A6D4FF;
        --semi-color-info-light-default: rgba(84, 169, 255, 0.18);
        --semi-color-success-light-default: rgba(93, 194, 100, 0.18);
        --semi-color-warning-light-default: rgba(255, 174, 67, 0.18);

        --semi-color-bg-0: #16161A;
        --semi-color-bg-1: #232429;
        --semi-color-bg-2: #35363C;
        --semi-color-bg-3: #35363C;
        --semi-color-fill-0: rgba(255, 255, 255, 0.12);
        --semi-color-fill-1: rgba(255, 255, 255, 0.16);
        --semi-color-fill-2: rgba(255, 255, 255, 0.20);

        --semi-color-text-0: #F9F9F9;
        --semi-color-text-1: rgba(249, 249, 249, 0.8);
        --semi-color-text-2: rgba(249, 249, 249, 0.6);
        --semi-color-text-3: rgba(249, 249, 249, 0.35);
        --semi-color-disabled-text: rgba(249, 249, 249, 0.35);

        --semi-color-border: rgba(255, 255, 255, 0.08);
        --semi-color-focus-border: #54A9FF;
        --semi-color-disabled-border: #2E3238;

        --semi-color-disabled-bg: #2E3238;
    }
}

/* ============================================
 * Reset & Base
 * ============================================ */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

body {
    font-family: var(--semi-font-family);
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-0);
    background-color: var(--semi-color-bg-0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
 * Shared Admin Components
 * Shared across all admin pages (articles, tools, ransomdb, cases, etc.)
 * ============================================ */

/* --- Filter Bar --- */
.filter-bar { margin-bottom: var(--sp-lg); }

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-lg);
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--sp-xs);
    flex: 1;
    min-width: 140px;
}

.filter-label {
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    letter-spacing: 0.57px;
    text-transform: uppercase;
    color: var(--semi-color-text-1);
}

.filter-actions {
    display: flex;
    gap: var(--sp-sm);
    padding-bottom: var(--sp-xs);
}

/* --- Form Elements --- */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: 32px;
    padding: 0 var(--sp-lg);
    font-family: var(--semi-font-family);
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-0);
    background-color: var(--semi-color-fill-0);
    border: 1px solid transparent;
    border-radius: var(--semi-border-radius-small);
    outline: none;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.form-textarea {
    height: auto;
    padding: var(--sp-md) var(--sp-lg);
    resize: vertical;
    min-height: 80px;
}

.form-textarea--large { min-height: 120px; }

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    background-color: var(--semi-color-fill-1);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    background-color: var(--semi-color-fill-0);
    border-color: var(--semi-color-focus-border);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--semi-color-text-2);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7075' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--sp-lg) center;
    padding-right: 40px;
}

.form-hint {
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    color: var(--semi-color-text-1);
    margin-top: var(--sp-xs);
}

.form-error {
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    color: var(--semi-color-danger);
    margin-top: var(--sp-xs);
}

.required { color: var(--semi-color-danger); }

/* --- Form Card --- */
.form-card { margin-bottom: var(--sp-lg); }

.form-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-xl);
}

.form-card__title {
    font-size: 18px;
    font-weight: 600;
    line-height: 24px;
    color: var(--semi-color-text-0);
    margin: 0 0 var(--sp-xl) 0;
}

.form-card__header .form-card__title { margin: 0; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--sp-xs);
}

.form-group--full { grid-column: 1 / -1; }

.form-label {
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-0);
}

/* --- Alert --- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-md);
    padding: var(--sp-lg);
    border-radius: var(--semi-border-radius-medium);
    margin-bottom: var(--sp-lg);
}

.alert .ti { font-size: 20px; flex-shrink: 0; margin-top: 2px; }

.alert--error {
    background-color: rgba(249, 57, 32, 0.08);
    border: 1px solid var(--semi-color-danger);
    color: var(--semi-color-danger);
}

.alert ul { margin: 0; padding: 0; list-style: none; }
.alert li { font-size: 14px; line-height: 20px; }

/* --- Status Badges --- */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--sp-xs) var(--sp-md);
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    text-transform: uppercase;
    letter-spacing: 0.57px;
    border-radius: var(--semi-border-radius-small);
}

.status-badge--published {
    background-color: rgba(59, 179, 70, 0.08);
    color: var(--semi-color-success);
}

.status-badge--featured {
    background-color: rgba(0, 100, 250, 0.08);
    color: var(--semi-color-primary);
}

.status-badge--draft {
    background-color: var(--semi-color-fill-0);
    color: var(--semi-color-text-1);
}

/* --- Table Actions --- */
.table-actions { display: flex; gap: var(--sp-xs); }

/* --- Data Table --- */
.data-table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    letter-spacing: 0.57px;
    text-transform: uppercase;
    color: var(--semi-color-text-1);
    background-color: var(--semi-color-fill-0);
    padding: var(--sp-md) var(--sp-lg);
    white-space: nowrap;
}

.data-table th:first-child {
    border-radius: var(--semi-border-radius-small) 0 0 0;
}

.data-table th:last-child {
    border-radius: 0 var(--semi-border-radius-small) 0 0;
}

.data-table td {
    padding: var(--sp-md) var(--sp-lg);
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-0);
    border-top: 1px solid var(--semi-color-border);
}

.data-table tr:hover td {
    background-color: var(--semi-color-fill-0);
}

.data-table__title-cell {
    color: var(--semi-color-text-0);
}

.data-table__title-cell:hover {
    color: var(--semi-color-primary);
}

.badge-chip {
    display: inline-flex;
    align-items: center;
    padding: var(--sp-xs) var(--sp-md);
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    color: var(--semi-color-text-0);
    background-color: var(--semi-color-fill-0);
    border-radius: var(--semi-border-radius-small);
    white-space: nowrap;
}

.data-table__meta {
    font-size: 14px;
    font-weight: 400;
    color: var(--semi-color-text-1);
}

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--sp-3xl) var(--sp-lg);
    text-align: center;
}

.empty-state--small { padding: var(--sp-xl); }

.empty-state .ti {
    font-size: 48px;
    color: var(--semi-color-text-2);
    margin-bottom: var(--sp-lg);
}

.empty-state__text {
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-1);
    margin: 0 0 var(--sp-lg) 0;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-xs);
    margin-top: var(--sp-xl);
    padding-top: var(--sp-xl);
    border-top: 1px solid var(--semi-color-border);
}

.pagination__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: var(--sp-xs) var(--sp-md);
    font-family: var(--semi-font-family);
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-0);
    background-color: transparent;
    border: 1px solid var(--semi-color-border);
    border-radius: var(--semi-border-radius-small);
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.pagination__btn:hover {
    background-color: var(--semi-color-fill-1);
}

.pagination__btn--active {
    background-color: var(--semi-color-primary);
    color: #FFFFFF;
    border-color: var(--semi-color-primary);
}

.pagination__ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    font-family: var(--semi-font-family);
    font-size: 14px;
    color: var(--semi-color-text-2);
    user-select: none;
}

/* --- Page Header Actions --- */
.page-header__actions { display: flex; gap: var(--sp-md); }

/* --- Form Actions Bar --- */
.form-actions-bar {
    display: flex;
    justify-content: flex-end;
    gap: var(--sp-md);
    margin-bottom: var(--sp-xl);
}

/* --- Btn Icon --- */
.btn-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 1px solid var(--semi-color-border);
    border-radius: var(--semi-border-radius-small);
    color: var(--semi-color-text-0);
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-icon:hover:not(:disabled) { background-color: var(--semi-color-fill-1); }
.btn-icon:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-icon .ti { font-size: var(--semi-icon-size-medium); }

.btn-icon--danger {
    color: var(--semi-color-danger);
    border-color: var(--semi-color-danger);
}
.btn-icon--danger:hover:not(:disabled) { background-color: rgba(249, 57, 32, 0.05); }

/* --- Upload Area（Semi Design 文件上传制式：light 按钮 + 提示文案） --- */
.upload-area {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    cursor: pointer;
}

.upload-area--uploading {
    cursor: default;
    opacity: 0.7;
}

.upload-area__btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    height: 32px;
    padding: 0 var(--sp-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    color: var(--semi-color-primary);
    background-color: var(--semi-color-fill-0);
    border: none;
    border-radius: var(--semi-border-radius-small);
    cursor: pointer;
    transition: background-color 0.15s ease;
    flex-shrink: 0;
}

.upload-area:hover .upload-area__btn,
.upload-area--dragover .upload-area__btn {
    background-color: var(--semi-color-fill-1);
}

.upload-area:active .upload-area__btn {
    background-color: var(--semi-color-fill-2);
}

.upload-area__btn .ti {
    font-size: 16px;
}

.upload-area__hint {
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
    color: var(--semi-color-text-2);
}

.upload-file-card {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-md);
    width: fit-content;
    max-width: 100%;
    padding: var(--sp-sm) var(--sp-md);
    background-color: var(--semi-color-fill-0);
    border: none;
    border-radius: var(--semi-border-radius-small);
    transition: background-color 0.15s ease;
}

.upload-file-card:hover {
    background-color: var(--semi-color-fill-1);
}

.upload-file-card__icon {
    font-size: 24px;
    color: var(--semi-color-primary);
    flex-shrink: 0;
}

.upload-file-card__info {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    min-width: 0;
}

.upload-file-card__name {
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    color: var(--semi-color-text-0);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.upload-file-card__meta {
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--semi-color-text-2);
    white-space: nowrap;
    flex-shrink: 0;
}

.upload-file-card__remove {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--semi-border-radius-small);
    color: var(--semi-color-text-1);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
}

.upload-file-card__remove:hover {
    background-color: var(--semi-color-fill-1);
    color: var(--semi-color-danger);
}

.upload-file-card__remove .ti {
    font-size: var(--semi-icon-size-medium);
}

/* --- Platform Checkboxes --- */
.platform-checkboxes {
    display: flex;
    gap: var(--sp-lg);
    flex-wrap: wrap;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-xs);
    cursor: pointer;
    font-size: 14px;
    color: var(--semi-color-text-0);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--semi-color-primary);
    cursor: pointer;
    border-radius: var(--semi-border-radius-small);
}

/* --- Responsive (Shared) --- */
@media (max-width: 1024px) {
    .filter-form { flex-direction: column; }
    .filter-group { width: 100%; }
    .form-grid { grid-template-columns: 1fr; }
    .page-header__actions { flex-direction: column; width: 100%; }
    .page-header__actions .btn-outline-dark,
    .page-header__actions .btn-primary { width: 100%; justify-content: center; }
}

@media (max-width: 600px) {
    .table-actions { flex-direction: column; }
    .table-actions .btn-sm { width: 100%; }
}