:root {
    --dd-bg: #141d34;
    --dd-bg-soft: #1e293b;
    --dd-bg-softer: #1a202c;
    --dd-bg-contrast: #0f1729;
    --dd-border-subtle: rgba(255, 255, 255, 0.05);
    --dd-text: #ffffff;
    --dd-text-soft: #cbd5e1;
    --dd-text-softer: #64748b;
    --dd-accent: #6366f1;
    --dd-accent-soft: rgba(99, 102, 241, 0.14);
    --dd-accent-strong: #4f46e5;
    --dd-accent-2: #ec4899;
    --dd-accent-2-soft: rgba(236, 72, 153, 0.14);
    --dd-cyan: #06b6d4;
    --dd-danger: #ff5c7a;
    --dd-success: #2ecc71;
    --dd-radius-sm: 10px;
    --dd-radius-md: 16px;
    --dd-radius-lg: 24px;
    --dd-radius-pill: 999px;
    --dd-shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
    --dd-shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.38);
    --dd-nav-height: 64px;
    --dd-blur-strong: 26px;
    --dd-blur-soft: 16px;
    --dd-transition-fast: 0.18s cubic-bezier(0.4, 0.0, 0.2, 1);
    --dd-transition-med: 0.28s cubic-bezier(0.4, 0.0, 0.2, 1);
    --dd-transition-slow: 0.44s cubic-bezier(0.33, 1, 0.68, 1.0);
    --dd-section-padding-y: 4rem;
    --dd-font-display: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --dd-font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --dd-font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--dd-font-body);
    background-color: var(--dd-bg);
    color: var(--dd-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.svg-icon {
     height: 1em;
     width: auto;
     vertical-align: -0.125em;
     fill: currentcolor;
}

.ddt-bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

.ddt-bg-glow {
    position: fixed;
    z-index: 0;
    pointer-events: none;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12;
}

.ddt-bg-glow--1 {
    width: 600px;
    height: 600px;
    background: var(--dd-accent);
    top: -200px;
    right: -100px;
}

.ddt-bg-glow--2 {
    width: 400px;
    height: 400px;
    background: var(--dd-accent-2);
    bottom: -100px;
    left: -80px;
}

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

.ddt-navbar {
    height: var(--dd-nav-height);
    display: flex;
    align-items: center;
    padding: 0 24px;
    background: rgba(20, 29, 52, 0.72);
    backdrop-filter: blur(var(--dd-blur-strong));
    -webkit-backdrop-filter: blur(var(--dd-blur-strong));
    border-bottom: 1px solid var(--dd-border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
    gap: 16px;
}

.ddt-navbar__brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.ddt-navbar__logo {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ddt-logo-img {
    width: 36px;
    height: 36px;
}

.ddt-navbar__name {
    font-family: var(--dd-font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dd-text);
    letter-spacing: -0.01em;
}

.ddt-navbar__name span {
    background: linear-gradient(90deg, var(--dd-accent), var(--dd-accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ddt-navbar__divider {
    width: 1px;
    height: 24px;
    background: var(--dd-border-subtle);
    flex-shrink: 0;
}

.ddt-navbar__lang-selector {
    flex: 1;
    max-width: 260px;
}

.ddt-navbar__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.ddt-navbar__stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--dd-text-softer);
    padding: 5px 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-pill);
}

.ddt-navbar__stat svg {
    font-size: 0.7rem;
    color: var(--dd-text-softer);
}

.ddt-navbar__stat--active svg {
    color: var(--dd-success);
}

.ddt-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: 0;
    border-radius: var(--dd-radius-pill);
    background: linear-gradient(90deg, var(--dd-accent), var(--dd-accent-2));
    color: var(--dd-text);
    font-family: var(--dd-font-body);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    overflow: hidden;
    box-shadow: 0 6px 12px -3px rgba(99, 102, 241, 0.25);
    transition: box-shadow var(--dd-transition-fast);
    width: auto;
    max-width: fit-content;
    flex-shrink: 0;
    white-space: nowrap;
}

.ddt-button__content {
    position: relative;
    z-index: 10;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: transform var(--dd-transition-fast);
}

.ddt-button::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.18);
    transform: translateY(100%);
    transition: transform var(--dd-transition-fast);
    z-index: 1;
}

.ddt-button:hover::before {
    transform: translateY(0);
}

.ddt-button:hover {
    box-shadow: 0 12px 18px -4px rgba(99, 102, 241, 0.4);
}

.ddt-button--ghost {
    background: transparent;
    color: var(--dd-text-soft);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: none;
}

.ddt-button--ghost:hover {
    color: var(--dd-text);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.18);
    box-shadow: none;
}

.ddt-button--secondary {
    background: transparent;
    color: var(--dd-text-soft);
    border: 1px solid rgba(99, 102, 241, 0.28);
    box-shadow: none;
}

.ddt-button--secondary:hover {
    color: var(--dd-text);
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.55);
    box-shadow: none;
}

.ddt-button--danger {
    background: transparent;
    color: var(--dd-danger);
    border: 1px solid rgba(255, 92, 122, 0.28);
    box-shadow: none;
}

.ddt-button--danger:hover {
    background: rgba(255, 92, 122, 0.1);
    border-color: rgba(255, 92, 122, 0.55);
    box-shadow: none;
}

.ddt-button--sm {
    padding: 7px 14px;
    font-size: 0.78rem;
}

.ddt-button--icon {
    padding: 8px;
    width: 34px;
    height: 34px;
    border-radius: var(--dd-radius-sm);
}

.ddt-button--icon .ddt-button__content {
    gap: 0;
}

.ddt-select-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.ddt-select-wrapper svg {
    position: absolute;
    left: 12px;
    font-size: 0.8rem;
    color: var(--dd-text-softer);
    pointer-events: none;
    z-index: 2;
}

.ddt-select-wrapper .ddt-select-arrow {
    position: absolute;
    right: 10px;
    left: auto;
    font-size: 0.7rem;
    color: var(--dd-text-softer);
}

.ddt-select {
    appearance: none;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: var(--dd-radius-sm);
    color: var(--dd-text-soft);
    font-family: var(--dd-font-body);
    font-size: 0.85rem;
    padding: 8px 32px 8px 34px;
    cursor: pointer;
    outline: none;
    transition: border-color var(--dd-transition-fast), background var(--dd-transition-fast);
    width: 100%;
}

.ddt-select:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.06);
}

.ddt-select:focus {
    border-color: var(--dd-accent);
    background: rgba(99, 102, 241, 0.08);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.ddt-select option {
    background: #1e293b;
    color: var(--dd-text);
}

.ddt-select optgroup {
    background: #141d34;
    color: var(--dd-text-softer);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ddt-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px 20px 0;
    gap: 14px;
}

.ddt-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ddt-toolbar__group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.ddt-toolbar__separator {
    width: 1px;
    height: 22px;
    background: var(--dd-border-subtle);
}

.ddt-toolbar__label {
    font-size: 0.75rem;
    color: var(--dd-text-softer);
    font-weight: 500;
    white-space: nowrap;
}

.ddt-toolbar__right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ddt-option-group {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-sm);
    overflow: hidden;
}

.ddt-option-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 6px 12px;
    background: transparent;
    border: none;
    color: var(--dd-text-softer);
    font-family: var(--dd-font-body);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--dd-transition-fast);
    border-right: 1px solid var(--dd-border-subtle);
    white-space: nowrap;
}

.ddt-option-btn:last-child {
    border-right: none;
}

.ddt-option-btn:hover {
    background: rgba(255,255,255,0.05);
    color: var(--dd-text-soft);
}

.ddt-option-btn.ddt-active {
    background: var(--dd-accent-soft);
    color: var(--dd-accent);
}

.ddt-indent-control {
    display: flex;
    align-items: center;
    gap: 0;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-sm);
    overflow: hidden;
}

.ddt-indent-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--dd-text-softer);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all var(--dd-transition-fast);
}

.ddt-indent-btn:hover {
    background: rgba(255,255,255,0.06);
    color: var(--dd-text-soft);
}

.ddt-indent-value {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dd-text-soft);
    border-left: 1px solid var(--dd-border-subtle);
    border-right: 1px solid var(--dd-border-subtle);
    font-family: var(--dd-font-mono);
}

.ddt-editors {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    min-height: 0;
}

.ddt-editor-panel {
    display: flex;
    flex-direction: column;
    background: var(--dd-bg-contrast);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-md);
    overflow: hidden;
    transition: border-color var(--dd-transition-fast);
    min-height: 320px;
    max-height: 65vh;
}

.ddt-editor-panel:focus-within {
    border-color: rgba(99, 102, 241, 0.3);
}

.ddt-editor-panel--output {
    border-color: rgba(6, 182, 212, 0.12);
}

.ddt-editor-panel--output:focus-within {
    border-color: rgba(6, 182, 212, 0.3);
}

.ddt-panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    background: rgba(255, 255, 255, 0.025);
    border-bottom: 1px solid var(--dd-border-subtle);
    flex-shrink: 0;
}

.ddt-panel-header__dots {
    display: flex;
    gap: 5px;
    flex-shrink: 0;
}

.ddt-panel-header__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.ddt-panel-header__dot--red { background: #ff5f57; }
.ddt-panel-header__dot--yellow { background: #febc2e; }
.ddt-panel-header__dot--green { background: #28c840; }

.ddt-panel-header__title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--dd-text-softer);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    font-family: var(--dd-font-display);
}

.ddt-panel-header__badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--dd-radius-pill);
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.ddt-panel-header__badge--input {
    background: var(--dd-accent-soft);
    color: var(--dd-accent);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.ddt-panel-header__badge--output {
    background: rgba(6, 182, 212, 0.1);
    color: var(--dd-cyan);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.ddt-panel-header__actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
}

.ddt-panel-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--dd-text-softer);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all var(--dd-transition-fast);
}

.ddt-panel-action:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--dd-border-subtle);
    color: var(--dd-text-soft);
}

.ddt-panel-action--danger:hover {
    background: rgba(255, 92, 122, 0.1);
    border-color: rgba(255, 92, 122, 0.2);
    color: var(--dd-danger);
}

.ddt-editor-body {
    position: relative;
    display: flex;
    min-height: 0;
    overflow: hidden;
    height: 100%;
}

.ddt-line-numbers {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    padding: 14px 0 0 0;
    min-width: 44px;
    background: rgba(0,0,0,0.12);
    border-right: 1px solid var(--dd-border-subtle);
    user-select: none;
    overflow-x: hidden;
    overflow-y: hidden;
    font-family: var(--dd-font-mono);
    will-change: transform;
}

.ddt-line-number {
    font-family: var(--dd-font-mono);
    font-size: 13px;
    color: var(--dd-text-softer);
    text-align: right;
    padding: 0 10px 0 6px;
    line-height: 20px;
    height: 20px;
    opacity: 0.5;
    box-sizing: border-box;
}

.ddt-editor-textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    padding: 14px 16px 0 16px;
    margin-left: 44px;
    font-family: var(--dd-font-mono);
    font-size: 13px;
    line-height: 20px;
    color: var(--dd-text-soft);
    tab-size: 2;
    caret-color: var(--dd-accent);
    width: 100%;
    height: 100%;
    white-space: pre;
    overflow-x: auto;
    overflow-y: auto;
}

.ddt-editor-textarea[data-wrap="on"] {
    white-space: pre-wrap;
    overflow-x: hidden;
}

.ddt-editor-textarea::placeholder {
    color: var(--dd-text-softer);
    opacity: 0.5;
}

.ddt-editor-textarea::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

.ddt-editor-textarea::-webkit-scrollbar-track {
    background: transparent;
}

.ddt-editor-textarea::-webkit-scrollbar-thumb {
    background: rgba(99,102,241,0.3);
    border-radius: 99px;
}

.ddt-editor-textarea::-webkit-scrollbar-thumb:hover {
    background: rgba(99,102,241,0.55);
}

.ddt-diff-view {
    flex: 1;
    background: var(--dd-panel-bg);
    border: none;
    color: var(--dd-text);
    font-family: var(--dd-font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    padding: 14px 16px;
    margin-left: 44px;
    resize: none;
    outline: none;
    overflow-x: auto;
    overflow-y: auto;
    white-space: pre;
    tab-size: 2;
}

.ddt-diff-line {
    display: flex;
    min-height: 1.6em;
}

.ddt-diff-line-num {
    width: 40px;
    color: var(--dd-text-softer);
    text-align: right;
    padding-right: 12px;
    user-select: none;
    opacity: 0.5;
}

.ddt-diff-line-content {
    flex: 1;
    padding-left: 8px;
}

.ddt-diff-line.added {
    background: rgba(46, 204, 113, 0.15);
}

.ddt-diff-line.added .ddt-diff-line-content {
    color: #2ecc71;
}

.ddt-diff-line.added::before {
    content: '+';
    color: #2ecc71;
    font-weight: bold;
    margin-right: 8px;
}

.ddt-diff-line.removed {
    background: rgba(255, 71, 87, 0.15);
}

.ddt-diff-line.removed .ddt-diff-line-content {
    color: #ff4757;
}

.ddt-diff-line.removed::before {
    content: '-';
    color: #ff4757;
    font-weight: bold;
    margin-right: 8px;
}

.ddt-diff-line.unchanged {
    color: var(--dd-text);
}

.ddt-diff-line.unchanged::before {
    content: ' ';
    margin-right: 8px;
}

.ddt-panel-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-top: 1px solid var(--dd-border-subtle);
    background: rgba(0,0,0,0.1);
    flex-shrink: 0;
}

.ddt-panel-footer__info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.7rem;
    color: var(--dd-text-softer);
    font-family: var(--dd-font-mono);
}

.ddt-panel-footer__item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ddt-panel-footer__dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--dd-text-softer);
}

.ddt-panel-footer__dot--success {
    background: var(--dd-success);
    box-shadow: 0 0 6px var(--dd-success);
}

.ddt-panel-footer__dot--error {
    background: var(--dd-danger);
    box-shadow: 0 0 6px var(--dd-danger);
}

.ddt-center-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 0 4px;
    flex-shrink: 0;
    align-self: center;
}

.ddt-center-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--dd-radius-sm);
    border: 1px solid var(--dd-border-subtle);
    background: rgba(255,255,255,0.03);
    color: var(--dd-text-softer);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--dd-transition-fast);
}

.ddt-center-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.35);
    color: var(--dd-accent);
}

.ddt-editors-wrapper {
    display: flex;
    gap: 0;
    flex: 1;
    min-height: 0;
}

.ddt-action-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 0 16px;
    flex-wrap: wrap;
}

.ddt-action-bar__left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.ddt-action-bar__right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.ddt-format-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border: 0;
    border-radius: var(--dd-radius-pill);
    background: linear-gradient(90deg, var(--dd-accent), var(--dd-accent-2));
    color: var(--dd-text);
    font-family: var(--dd-font-body);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    overflow: hidden;
    box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.4), 0 0 0 1px rgba(99, 102, 241, 0.2);
    transition: box-shadow var(--dd-transition-fast), transform var(--dd-transition-fast);
    letter-spacing: 0.01em;
}

.ddt-format-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.15);
    transform: translateY(100%);
    transition: transform var(--dd-transition-fast);
}

.ddt-format-btn:hover::before {
    transform: translateY(0);
}

.ddt-format-btn:hover {
    box-shadow: 0 14px 28px -4px rgba(99, 102, 241, 0.55), 0 0 0 1px rgba(99, 102, 241, 0.35);
    transform: translateY(-1px);
}

.ddt-format-btn:active {
    transform: translateY(0px);
}

.ddt-format-btn svg {
    position: relative;
    z-index: 1;
    font-size: 0.85rem;
}

.ddt-format-btn span {
    position: relative;
    z-index: 1;
}

.ddt-format-btn .ddt-kbd {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    padding: 1px 6px;
    background: rgba(255,255,255,0.2);
    border-radius: 5px;
    font-size: 0.68rem;
    font-family: var(--dd-font-mono);
    font-weight: 600;
    letter-spacing: 0.02em;
    opacity: 0.85;
}

.ddt-status-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 7px 20px;
    background: var(--dd-bg-contrast);
    border-top: 1px solid var(--dd-border-subtle);
    font-size: 0.7rem;
    color: var(--dd-text-softer);
    font-family: var(--dd-font-mono);
    margin-top: auto;
    flex-wrap: wrap;
}

.ddt-status-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.ddt-status-item svg {
    font-size: 0.65rem;
}

.ddt-status-item--accent { color: var(--dd-accent); }
.ddt-status-item--success { color: var(--dd-success); }
.ddt-status-item--cyan { color: var(--dd-cyan); }

.ddt-status-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 16px;
}

.ddt-settings-panel {
    background: var(--dd-bg-contrast);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-md);
    overflow: hidden;
    display: none;
}

.ddt-settings-panel.ddt-open {
    display: block;
}

.ddt-settings-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--dd-border-subtle);
}

.ddt-settings-header svg {
    color: var(--dd-accent);
    font-size: 0.85rem;
}

.ddt-settings-header__title {
    font-family: var(--dd-font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dd-text-soft);
}

.ddt-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    padding: 16px;
}

.ddt-setting-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ddt-setting-label {
    font-size: 0.73rem;
    font-weight: 600;
    color: var(--dd-text-softer);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.ddt-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.ddt-toggle-label {
    font-size: 0.82rem;
    color: var(--dd-text-soft);
}

.ddt-toggle {
    position: relative;
    width: 38px;
    height: 20px;
    flex-shrink: 0;
}

.ddt-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.ddt-toggle__track {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.08);
    cursor: pointer;
    transition: background var(--dd-transition-fast);
}

.ddt-toggle__track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--dd-transition-fast);
    opacity: 0.5;
}

.ddt-toggle input:checked + .ddt-toggle__track {
    background: var(--dd-accent);
    border-color: transparent;
}

.ddt-toggle input:checked + .ddt-toggle__track::after {
    transform: translateX(18px);
    opacity: 1;
}

.ddt-lang-pills {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
}

.ddt-lang-pills::-webkit-scrollbar {
    display: none;
}

.ddt-lang-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: var(--dd-radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--dd-font-body);
    cursor: pointer;
    border: 1px solid var(--dd-border-subtle);
    background: rgba(255,255,255,0.03);
    color: var(--dd-text-softer);
    transition: all var(--dd-transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}

.ddt-lang-pill:hover {
    border-color: rgba(99, 102, 241, 0.35);
    background: rgba(99, 102, 241, 0.08);
    color: var(--dd-text-soft);
}

.ddt-lang-pill.ddt-active {
    border-color: var(--dd-accent);
    background: var(--dd-accent-soft);
    color: var(--dd-accent);
}

.ddt-lang-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.ddt-dropzone {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--dd-bg-contrast);
    border: 2px dashed rgba(99, 102, 241, 0.25);
    border-radius: 10px;
    margin: 8px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dd-transition-fast);
    z-index: 10;
}

.ddt-dropzone__icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--dd-accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dd-accent);
    font-size: 1.1rem;
}

.ddt-dropzone__text {
    font-size: 0.85rem;
    color: var(--dd-text-softer);
    font-weight: 500;
}

.ddt-drag-over .ddt-dropzone {
    opacity: 1;
}

.ddt-diff-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-pill);
    font-size: 0.75rem;
    color: var(--dd-text-softer);
    cursor: pointer;
    transition: all var(--dd-transition-fast);
    font-family: var(--dd-font-body);
    font-weight: 500;
}

.ddt-diff-toggle:hover {
    border-color: rgba(99, 102, 241, 0.35);
    background: rgba(99, 102, 241, 0.06);
    color: var(--dd-text-soft);
}

.ddt-diff-toggle svg {
    font-size: 0.7rem;
}

.ddt-toast-area {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 9999;
}

.ddt-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--dd-bg-soft);
    border: 1px solid var(--dd-border-subtle);
    border-radius: var(--dd-radius-sm);
    box-shadow: var(--dd-shadow-soft);
    font-size: 0.82rem;
    color: var(--dd-text-soft);
    min-width: 220px;
    max-width: 320px;
    animation: ddt-slideIn 0.3s ease;
}

.ddt-toast--success {
    border-left: 3px solid var(--dd-success);
}

.ddt-toast--error {
    border-left: 3px solid var(--dd-danger);
}

.ddt-toast svg {
    font-size: 0.9rem;
    flex-shrink: 0;
}

.ddt-toast--success svg { color: var(--dd-success); }
.ddt-toast--error svg { color: var(--dd-danger); }

@keyframes ddt-slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes ddt-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.ddt-loading .ddt-format-btn svg {
    animation: ddt-pulse 1s infinite;
}

.ddt-shortcut-hint {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    color: var(--dd-text-softer);
}

.ddt-kbd {
    display: inline-flex;
    align-items: center;
    padding: 1px 6px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-bottom-width: 2px;
    border-radius: 5px;
    font-size: 0.68rem;
    font-family: var(--dd-font-mono);
    color: var(--dd-text-softer);
}

@media (max-width: 900px) {
    .ddt-editors {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr;
    }

    .ddt-navbar__stat {
        display: none;
    }

    .ddt-center-actions {
        flex-direction: row;
        padding: 0;
    }

    .ddt-toolbar {
        gap: 8px;
    }

    .ddt-toolbar__right {
        flex-wrap: wrap;
    }

    .ddt-action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .ddt-action-bar__right {
        margin-left: 0;
    }

    .ddt-format-btn {
        width: 100%;
        justify-content: center;
    }

    .ddt-action-bar__left {
        justify-content: space-between;
    }
}

@media (max-width: 640px) {
    .ddt-navbar {
        padding: 0 14px;
        gap: 10px;
    }

    .ddt-navbar__name {
        font-size: 0.9rem;
    }

    .ddt-navbar__logo {
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }

    .ddt-navbar__lang-selector {
        max-width: 160px;
    }

    .ddt-main {
        padding: 12px 12px 0;
        gap: 10px;
    }

    .ddt-toolbar__label {
        display: none;
    }

    .ddt-lang-pills {
        display: none;
    }

    .ddt-settings-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        padding: 12px;
    }

    .ddt-status-bar {
        gap: 10px;
        padding: 6px 14px;
    }

    .ddt-status-right {
        gap: 10px;
    }

    .ddt-action-bar {
        padding: 10px 0 12px;
    }
}

@media (max-width: 440px) {
    .ddt-option-btn {
        padding: 6px 8px;
        font-size: 0.72rem;
    }

    .ddt-navbar__divider {
        display: none;
    }
}