:root {
    --bg-page: #f5f5f5;
    --bg-panel: #fff;
    --bg-footer: #eee;
    --bg-dropzone: #fafafa;
    --bg-dropzone-hover: #eee;
    --border-color: #ddd;
    --border-dropzone: #bbb;
    --text-primary: #333;
    --text-secondary: #444;
    --text-muted: #555;
    --code-bg: #eee;
    --input-bg: #fff;
    --input-border: #ccc;
    --input-color: #555;
}

[data-theme="dark"] {
    --bg-page: #1a1a1a;
    --bg-panel: #2d2d2d;
    --bg-footer: #252525;
    --bg-dropzone: #252525;
    --bg-dropzone-hover: #333;
    --border-color: #444;
    --border-dropzone: #555;
    --text-primary: #e0e0e0;
    --text-secondary: #c0c0c0;
    --text-muted: #a0a0a0;
    --code-bg: #3d3d3d;
    --input-bg: #252525;
    --input-border: #555;
    --input-color: #e0e0e0;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    background: var(--bg-page);
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    transition: background 0.2s, color 0.2s;
}

.main-container {
    flex: 1 0 auto;
}

footer {
    flex-shrink: 0;
    padding: 20px;
    background: var(--bg-footer);
    text-align: center;
    color: var(--text-muted);
    margin-top: 20px;
    transition: background 0.2s, color 0.2s;
}

.navbar {
    border-radius: 0;
    margin-bottom: 0;
    transition: background 0.2s, border-color 0.2s;
}

[data-theme="dark"] .navbar-default {
    background: var(--bg-panel);
    border-color: var(--border-color);
}

[data-theme="dark"] .navbar-default .navbar-brand {
    color: var(--text-primary);
}

.navbar .container {
    display: flex;
    align-items: center;
}

.navbar-header {
    margin-right: auto;
}

.navbar-lang {
    flex-shrink: 0;
    margin-left: auto;
}

.lang-select {
    position: relative;
}

.lang-select-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 0.875rem;
    background: var(--input-bg, #fff);
    border: 1px solid var(--border-color, #ccc);
    color: var(--text-primary, #333);
    border-radius: 4px;
    cursor: pointer;
    line-height: 1.2;
}

.lang-select-trigger:hover {
    border-color: var(--border-dropzone, #bbb);
}

.lang-select-trigger .lang-trigger-flag {
    display: block;
    width: 20px;
    height: 14px;
    object-fit: cover;
    border-radius: 2px;
}

.lang-select-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    min-width: 100%;
    background: var(--bg-panel, #fff);
    border: 1px solid var(--border-color, #ddd);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    overflow: hidden;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 0.875rem;
    color: var(--text-primary, #333);
    cursor: pointer;
    white-space: nowrap;
}

.lang-option:hover {
    background: var(--bg-dropzone, #f5f5f5);
}

.lang-option img {
    width: 20px;
    height: 14px;
    object-fit: cover;
    border-radius: 2px;
    flex-shrink: 0;
}

[data-theme="dark"] .lang-select-trigger {
    background: var(--input-bg);
    border-color: var(--input-border);
    color: var(--input-color);
}

[data-theme="dark"] .lang-select-dropdown {
    background: var(--bg-panel);
    border-color: var(--border-color);
}

[data-theme="dark"] .lang-option:hover {
    background: var(--bg-dropzone-hover);
}

.panel {
    border-radius: 0;
    transition: background 0.2s, border-color 0.2s;
}

[data-theme="dark"] .panel-default {
    background: var(--bg-panel);
    border-color: var(--border-color);
}

[data-theme="dark"] .panel-body {
    background: var(--bg-panel);
    color: var(--text-secondary);
}

.section-title {
    margin-bottom: 20px;
}

.tool-panel {
    padding: 20px;
}

.dropzone {
    border: 2px dashed var(--border-dropzone);
    padding: 40px;
    text-align: center;
    background: var(--bg-dropzone);
    color: var(--text-secondary);
    cursor: pointer;
    transition: 0.2s;
}

.dropzone.dragover {
    background: var(--bg-dropzone-hover);
    border-color: var(--text-muted);
}

#faviconResult img {
    max-width: 64px;
    border: 1px solid var(--border-color);
    padding: 5px;
    background: var(--bg-panel);
    margin-right: 10px;
}

code {
    background: var(--code-bg);
    color: var(--text-primary);
    padding: 3px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

[data-theme="dark"] .form-control {
    background: var(--input-bg);
    border-color: var(--input-border);
    color: var(--input-color);
}

[data-theme="dark"] .form-control[readonly] {
    background: var(--input-bg);
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .list-unstyled a {
    color: var(--text-secondary);
}

[data-theme="dark"] .list-unstyled a:hover {
    color: var(--text-primary);
}

[data-theme="dark"] .help-block,
[data-theme="dark"] .label {
    color: var(--text-muted);
}

.formats-label {
    color: #fff !important;
}

[data-theme="dark"] label,
[data-theme="dark"] .checkbox label {
    color: var(--text-secondary);
}

.navbar-header {
    flex-shrink: 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 340px));
    gap: 24px;
    margin-top: 24px;
    max-width: 1200px;
}

.tool-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 4px;
    transition: box-shadow 0.2s, border-color 0.2s, background 0.2s;
    max-width: 100%;
}

.tool-card:hover {
    border-color: var(--border-dropzone);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .tool-card:hover {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.tool-card h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.tool-card p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.55;
    max-width: 38em;
}

.tool-card a {
    display: inline-block;
    padding: 6px 14px;
    background: #337ab7;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9rem;
}

.tool-card a:hover {
    background: #286090;
    color: #fff;
}

@media (min-width: 992px) {
    .tool-card h2 {
        font-size: 1.4rem;
    }
    .tool-card p {
        font-size: 1.0625rem;
        line-height: 1.6;
    }
    .tool-card a {
        font-size: 1rem;
        padding: 8px 16px;
    }
}

.theme-switch-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
}

.theme-switch-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.3;
}

.theme-switch {
    display: inline-flex;
    align-items: center;
    position: relative;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
    cursor: pointer;
    overflow: hidden;
    border-radius: 26px;
}

.theme-switch--sm {
    width: 36px;
    height: 20px;
    border-radius: 20px;
}

.theme-switch--sm .theme-switch-slider {
    border-radius: 20px;
}

.theme-switch--sm .theme-switch-slider::before {
    width: 12px;
    height: 12px;
    left: 4px;
    top: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.theme-switch input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-switch-slider {
    position: absolute;
    inset: 0;
    background: #ccc;
    border-radius: 26px;
    transition: background 0.25s;
    overflow: hidden;
}

.theme-switch-slider::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 3px;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
    transition: transform 0.25s;
}

.theme-switch input:checked + .theme-switch-slider {
    background: #337ab7;
}

.theme-switch input:checked + .theme-switch-slider::before {
    transform: translateX(22px);
}

.theme-switch--sm input:checked + .theme-switch-slider::before {
    transform: translateX(16px);
}

.theme-switch input:focus-visible + .theme-switch-slider {
    outline: 2px solid #337ab7;
    outline-offset: 2px;
}

[data-theme="dark"] .theme-switch-slider {
    background: var(--border-color);
}

[data-theme="dark"] .theme-switch input:checked + .theme-switch-slider {
    background: #5a9fd4;
}