:root {
    --bg-app: #0f1115;
    --bg-pane: #16181d;
    --bg-header: #1e2128;
    --bg-input: #0b0c0f;

    --border-color: #2a2e37;
    --border-focus: #5c6bc0;

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;

    --accent: #5c6bc0;
    --accent-hover: #4f5b93;

    --font-ui: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

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

/* Header */
.header {
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    height: 60px;
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    font-size: 0.65rem;
    background: var(--accent);
    color: white;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Workbench Layout */
.workbench {
    display: flex;
    flex: 1;
    overflow: hidden;
    padding: 1rem;
    gap: 1rem;
}

.pane {
    display: flex;
    flex-direction: column;
    background: var(--bg-pane);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.input-pane,
.output-pane {
    flex: 1;
}

.controls-pane {
    width: 250px;
    flex-shrink: 0;
    padding: 1rem;
    background: var(--bg-header);
}

.controls-pane h2 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Pane Headers */
.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.1);
}

.pane-header h2 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.slider {
    position: relative;
    width: 32px;
    height: 18px;
    background-color: #334155;
    border-radius: 18px;
    transition: .2s;
}

.slider::before {
    content: "";
    position: absolute;
    height: 14px;
    width: 14px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    border-radius: 50%;
    transition: .2s;
}

.toggle-switch input:checked+.slider {
    background-color: var(--accent);
}

.toggle-switch input:checked+.slider::before {
    transform: translateX(14px);
}

.label-text {
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Buttons */
.btn-icon {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-icon.highlight {
    background: var(--accent);
    color: white;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    gap: 0.4rem;
}

.btn-icon.highlight:hover {
    background: var(--accent-hover);
}

/* Textareas */
.textarea-wrapper {
    flex: 1;
    position: relative;
    display: flex;
}

textarea {
    flex: 1;
    background: var(--bg-input);
    color: #a6accd;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    padding: 1rem;
    border: none;
    resize: none;
    outline: none;
}

textarea:focus {
    box-shadow: inset 0 0 0 1px var(--border-focus);
}

#output-editor {
    background: var(--bg-pane);
    color: #89ddff;
    /* JSON string like color */
}

/* Detection Badge */
.floating-badge {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(92, 107, 192, 0.15);
    border: 1px solid rgba(92, 107, 192, 0.4);
    color: #82aaff;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.3s;
}

.floating-badge.hidden {
    opacity: 0;
}

.floating-badge span {
    font-weight: 700;
    color: white;
}

/* Format Selectors */
.converter-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.format-btn {
    background: var(--bg-pane);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.format-btn:hover {
    border-color: var(--text-secondary);
}

.format-btn.active {
    background: rgba(92, 107, 192, 0.1);
    border-color: var(--accent);
}

.format-preview {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.format-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    opacity: 0.8;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--accent);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.9rem;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}