/* ---------------------------------
   Global Settings & Variables
   --------------------------------- */

:root {
    --primary-color: #0d6efd; /* Modern blue */
    --primary-hover: #0b5ed7;
    --secondary-bg: #e9ecef;
    --secondary-hover: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --bg-color: #ffffff;
    --surface-color: #f8f9fa; /* Page background */
    --border-color: #dee2e6;
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-body);
    background: var(--surface-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------------------------------
   Main Container & Header
   --------------------------------- */

.container {
    max-width: 900px;
    margin: 40px auto;
    background: var(--bg-color);
    padding: 32px 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.header-icon {
    fill: var(--text-color);
}

h1 {
    text-align: center;
    color: var(--text-color);
    font-weight: 700;
    font-size: 2rem;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1.1rem;
}

/* ---------------------------------
   Tabs
   --------------------------------- */

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

.tab-button {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.2s ease;
    margin-bottom: -1px; /* Aligns border with container border */
}

.tab-button:hover {
    color: var(--text-color);
}

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

.tab-content {
    padding-top: 16px;
}

/* ---------------------------------
   Forms & Inputs
   --------------------------------- */

.form-group {
    margin-bottom: 24px;
}

.input-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Handles the case for the single-input "User" tab */
.input-row .input-wrapper:only-child {
    max-width: 50%;
}

label {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-color);
}

input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: var(--font-body);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.2);
}

/* ---------------------------------
   Buttons
   --------------------------------- */

.btn-primary,
.btn-secondary {
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

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

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

.button-group {
    display: flex;
    gap: 10px;
}

/* ---------------------------------
   Output Section
   --------------------------------- */

.output-section {
    margin-top: 32px;
}

.output-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding: 12px;
    background: var(--surface-color);
    border-radius: var(--border-radius);
}

.output-area {
    min-height: 200px;
    max-height: 500px;
    overflow-y: auto;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    font-family: var(--font-body);
    line-height: 1.7;
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 200px;
    text-align: center;
    color: var(--text-muted);
}

.placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    stroke: var(--text-muted);
    opacity: 0.6;
}

/* ---------------------------------
   Toggle Switch
   --------------------------------- */

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* ---------------------------------
   Markdown/HTML Preview Styling
   (Inside the output area)
   --------------------------------- */

.output-area h1,
.output-area h2,
.output-area h3,
.output-area h4 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
    margin-top: 1.5em;
    margin-bottom: 1em;
    font-weight: 700;
}

.output-area p {
    margin-bottom: 1em;
}

.output-area code {
    background-color: var(--surface-color);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9em;
}

.output-area pre {
    background-color: var(--surface-color);
    padding: 16px;
    border-radius: var(--border-radius);
    overflow: auto;
    margin-bottom: 1em;
}

.output-area pre code {
    background: none;
    padding: 0;
    font-size: 1em;
    line-height: 1.45;
}

.output-area ul,
.output-area ol {
    margin-bottom: 1em;
    padding-left: 2em;
}

.output-area li {
    margin-bottom: 0.5em;
}

.output-area blockquote {
    padding: 0 1em;
    color: var(--text-muted);
    border-left: 0.25em solid var(--border-color);
    margin: 0 0 1em 0;
}

.output-area table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

.output-area th,
.output-area td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
}

.output-area th {
    background-color: var(--surface-color);
    font-weight: 600;
}