* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

:root {
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --secondary-color: #64748B;
    --success-color: #22C55E;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --bg-light: #F8FAFC;
    --bg-card: #FFFFFF;
    --border-color: #E2E8F0;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

.dark-mode {
    --bg-light: #1E293B;
    --bg-card: #334155;
    --border-color: #475569;
    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
}

.ieh-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.ieh-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.ieh-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 20px;
}

.ieh-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.125rem;
}

.ieh-logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), #8B5CF6);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: bold;
}

.ieh-nav {
    display: none;
}

.ieh-nav-list {
    display: flex;
    gap: 16px;
    list-style: none;
}

.ieh-nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.ieh-nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.ieh-nav-link.active {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.ieh-tools-dropdown {
    position: relative;
}

.ieh-tools-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.ieh-tools-dropdown-btn:hover {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.ieh-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s;
    z-index: 1000;
}

.ieh-tools-dropdown:hover .ieh-dropdown-menu,
.ieh-tools-dropdown:focus-within .ieh-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.ieh-dropdown-group {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.ieh-dropdown-group:last-child {
    border-bottom: none;
}

.ieh-dropdown-group-title {
    padding: 4px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ieh-dropdown-link {
    display: block;
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

.ieh-dropdown-link:hover {
    background-color: rgba(59, 130, 246, 0.05);
    color: var(--primary-color);
}

.ieh-theme-toggle {
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.ieh-theme-toggle:hover {
    background-color: var(--bg-light);
    color: var(--text-primary);
}

.ieh-burger-btn {
    display: block;
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.ieh-burger-btn:hover {
    background-color: var(--bg-light);
}

.ieh-sidebar {
    position: fixed;
    top: 64px;
    left: -280px;
    width: 280px;
    height: calc(100vh - 64px);
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    transition: left 0.3s;
    z-index: 99;
}

.ieh-sidebar.open {
    left: 0;
}

.ieh-sidebar-overlay {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 98;
}

.ieh-sidebar-overlay.active {
    display: block;
}

.ieh-sidebar-section {
    padding: 16px;
}

.ieh-sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.ieh-sidebar-list {
    list-style: none;
}

.ieh-sidebar-item {
    margin-bottom: 4px;
}

.ieh-sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.ieh-sidebar-link:hover {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.ieh-sidebar-link.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.ieh-sidebar-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    border-radius: var(--radius-sm);
}

.ieh-main {
    margin-top: 64px;
    min-height: calc(100vh - 128px);
    padding: 40px 20px;
}

.ieh-page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.ieh-page-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.ieh-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.875rem;
}

.ieh-breadcrumb-link {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.ieh-breadcrumb-link:hover {
    color: var(--primary-color);
}

.ieh-breadcrumb-current {
    color: var(--text-muted);
}

.ieh-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.ieh-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.ieh-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background-color: var(--bg-light);
}

.ieh-upload-area:hover,
.ieh-upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.ieh-upload-area.has-file {
    border-style: solid;
    border-color: var(--primary-color);
}

.ieh-upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 24px;
}

.ieh-upload-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.ieh-upload-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.ieh-upload-input {
    display: none;
}

.ieh-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.ieh-btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.ieh-btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.ieh-btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-primary);
}

.ieh-btn-secondary:hover {
    background-color: var(--border-color);
}

.ieh-btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.ieh-btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.ieh-btn-success {
    background-color: var(--success-color);
    color: white;
}

.ieh-btn-success:hover {
    background-color: #16A34A;
}

.ieh-btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.ieh-form-group {
    margin-bottom: 20px;
}

.ieh-form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.ieh-form-input {
    width: 100%;
    padding: 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.ieh-form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.ieh-form-select {
    width: 100%;
    padding: 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

.ieh-form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.ieh-form-textarea {
    width: 100%;
    padding: 12px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.2s;
}

.ieh-form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.ieh-range-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ieh-form-range {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--bg-light);
    border-radius: 3px;
    cursor: pointer;
}

.ieh-form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background-color: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.ieh-form-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.ieh-form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.ieh-range-value {
    min-width: 60px;
    text-align: right;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ieh-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ieh-switch-input {
    display: none;
}

.ieh-switch-track {
    width: 44px;
    height: 24px;
    background-color: var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.ieh-switch-input:checked + .ieh-switch-track {
    background-color: var(--primary-color);
}

.ieh-switch-thumb {
    position: absolute;
    left: 2px;
    top: 50%;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transform: translateY(-50%);
    transition: left 0.2s;
    box-shadow: var(--shadow-sm);
}

.ieh-switch-input:checked + .ieh-switch-track .ieh-switch-thumb {
    left: 22px;
}

.ieh-grid {
    display: grid;
    gap: 24px;
}

.ieh-grid-2 {
    grid-template-columns: repeat(1, 1fr);
}

.ieh-grid-3 {
    grid-template-columns: repeat(1, 1fr);
}

.ieh-tool-card {
    display: block;
    text-decoration: none;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.2s;
}

.ieh-tool-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.ieh-tool-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 20px;
}

.ieh-tool-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.ieh-tool-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.ieh-progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-light);
    border-radius: 4px;
    overflow: hidden;
}

.ieh-progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.ieh-preview-container {
    max-width: 100%;
    overflow: hidden;
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ieh-preview-image {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.ieh-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.ieh-info-item {
    padding: 16px;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.ieh-info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.ieh-info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ieh-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.ieh-tab {
    padding: 12px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.ieh-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

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

.ieh-tab-content.active {
    display: block;
}

.ieh-faq-item {
    border-bottom: 1px solid var(--border-color);
}

.ieh-faq-item:last-child {
    border-bottom: none;
}

.ieh-faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
}

.ieh-faq-question:hover {
    color: var(--primary-color);
}

.ieh-faq-arrow {
    font-size: 14px;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.ieh-faq-item.active .ieh-faq-arrow {
    transform: rotate(180deg);
}

.ieh-faq-answer {
    padding: 0 0 16px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: none;
}

.ieh-faq-item.active .ieh-faq-answer {
    display: block;
}

.ieh-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
}

.ieh-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: var(--bg-light);
    border-radius: 20px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.ieh-feature-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--success-color);
    font-size: 12px;
}

.ieh-footer {
    background-color: var(--bg-light);
    padding: 40px 20px;
    border-top: 1px solid var(--border-color);
}

.ieh-footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.ieh-footer-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.ieh-footer-list {
    list-style: none;
}

.ieh-footer-item {
    margin-bottom: 8px;
}

.ieh-footer-link {
    text-decoration: none;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.ieh-footer-link:hover {
    color: var(--primary-color);
}

.ieh-footer-copyright {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.ieh-alert {
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.ieh-alert-success {
    background-color: rgba(34, 197, 94, 0.1);
    border-left: 4px solid var(--success-color);
}

.ieh-alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
}

.ieh-alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border-left: 4px solid var(--error-color);
}

.ieh-alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--primary-color);
}

.ieh-alert-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.ieh-alert-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.ieh-image-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.ieh-image-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
}

.ieh-image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ieh-image-item .ieh-remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    background-color: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
}

.ieh-image-item:hover .ieh-remove-btn {
    opacity: 1;
}

@media (min-width: 768px) {
    .ieh-nav {
        display: flex;
        align-items: center;
        gap: 24px;
    }

    .ieh-burger-btn {
        display: none;
    }

    .ieh-sidebar {
        display: none;
    }

    .ieh-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .ieh-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .ieh-footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .ieh-main {
        display: grid;
        grid-template-columns: 280px 1fr;
        gap: 32px;
        padding: 40px;
    }

    .ieh-sidebar {
        position: sticky;
        top: 104px;
        left: auto;
        width: 280px;
        height: fit-content;
        background-color: transparent;
        border-right: none;
        overflow-y: visible;
    }

    .ieh-sidebar-section {
        background-color: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 20px;
    }
}