:root {
    --text: #333;
    --heading: #111;
    --accent: #555;
    --bg: #fff;
    --border: #eee;
    --link: #0066cc;
    --button-primary: #0066cc;
    --button-primary-hover: #0055aa;
    --button-secondary: #f5f5f5;
    --button-secondary-hover: #e5e5e5;
    --page-bg: #f8f9fa;
    --shadow: rgba(0,0,0,0.08);
    --flash-bg: #f8d7da;
    --flash-color: #721c24;
    --flash-border: #f5c6cb;
    --code-bg: #f8f9fa;
    --textarea-bg: #fff;
    --hastebin-bg: #f8f9fa;
    --hastebin-border: #ddd;
}

[data-theme="dark"] {
    --text: #e0e0e0;
    --heading: #ffffff;
    --accent: #a0a0a0;
    --bg: #1a1a1a;
    --border: #333333;
    --link: #4da6ff;
    --button-primary: #4da6ff;
    --button-primary-hover: #3399ff;
    --button-secondary: #2a2a2a;
    --button-secondary-hover: #3a3a3a;
    --page-bg: #121212;
    --shadow: rgba(0,0,0,0.3);
    --flash-bg: #2d1b1b;
    --flash-color: #f5c6cb;
    --flash-border: #3a2a2a;
    --code-bg: #2a2a2a;
    --textarea-bg: #1a1a1a;
    --hastebin-bg: #2a2a2a;
    --hastebin-border: #444;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text: #e0e0e0;
        --heading: #ffffff;
        --accent: #a0a0a0;
        --bg: #1a1a1a;
        --border: #333333;
        --link: #4da6ff;
        --button-primary: #4da6ff;
        --button-primary-hover: #3399ff;
        --button-secondary: #2a2a2a;
        --button-secondary-hover: #3a3a3a;
        --page-bg: #121212;
        --shadow: rgba(0,0,0,0.3);
        --flash-bg: #2d1b1b;
        --flash-color: #f5c6cb;
        --flash-border: #3a2a2a;
        --code-bg: #2a2a2a;
        --textarea-bg: #1a1a1a;
        --hastebin-bg: #2a2a2a;
        --hastebin-border: #444;
    }
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--page-bg);
    margin: 0;
    padding: 0;
    font-weight: 400;
    transition: background-color 0.3s ease, color 0.3s ease;
}
.page-container {
    max-width: 900px;
    margin: 0 auto;
}
header {
    background-color: var(--bg);
    padding: 2rem;
    border-bottom: 1px solid var(--border);
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
footer {
    background-color: var(--bg);
    padding: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.9rem;
    color: var(--accent);
    margin-top: 3rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.main-container {
    background: var(--bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow);
    margin: 0 1rem 2rem 1rem;
    transition: all 0.3s ease;
}
h1, h2, h3, h4 {
    font-weight: 600;
    color: var(--heading);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    margin-top: 0;
}
h2 {
    font-size: 1.75rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}
h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--heading);
}
.header-subtitle {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--accent);
}
textarea {
    width: 100%;
    height: 250px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: monospace;
    margin-bottom: 1rem;
    box-sizing: border-box;
    background-color: var(--textarea-bg);
    color: var(--text);
    transition: all 0.3s ease;
}
textarea:focus {
    outline: 2px solid var(--link);
    outline-offset: 2px;
    border-color: var(--link);
}
.slide-lint-panel {
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--button-secondary);
    color: var(--text);
    font-size: 0.92rem;
}
.slide-lint-panel[hidden] {
    display: none;
}
.slide-lint-panel__header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
    color: var(--heading);
    font-weight: 600;
}
.slide-lint-panel__meta {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}
.slide-lint-panel ul {
    margin: 0.4rem 0 0;
    padding-left: 1.2rem;
}
.slide-lint-panel li {
    margin: 0.25rem 0;
}
.slide-lint-panel__warning {
    color: var(--flash-color);
}
a {
    color: var(--link);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.3s ease;
    margin: 0.25rem;
}
button:focus {
    outline: 2px solid var(--link);
    outline-offset: 2px;
}
button[disabled] {
    cursor: not-allowed;
    opacity: 0.6;
}
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
}
pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}
code {
    font-family: monospace;
    font-size: 0.9em;
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    transition: background-color 0.3s ease;
}
.toggle-button {
    background: none;
    border: none;
    color: var(--link);
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
    font-size: 0.9rem;
}
.toggle-button:hover {
    color: var(--button-primary-hover);
}
.form-group {
    margin-bottom: 1rem;
}
.form-control {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    box-sizing: border-box;
    background-color: var(--textarea-bg);
    color: var(--text);
    transition: all 0.3s ease;
}
.form-control:focus {
    outline: 2px solid var(--link);
    outline-offset: 2px;
    border-color: var(--link);
}
label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text);
}
.api-docs {
    margin-top: 1.5rem;
    padding-top: 0;
    border-top: none;
}
.api-docs > summary {
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--heading);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}
.api-docs > summary::-webkit-details-marker { display: none; }
.api-docs > summary::before {
    content: "▸";
    display: inline-block;
    font-size: 0.85em;
    color: var(--accent);
    transition: transform 0.2s ease;
}
.api-docs[open] > summary::before { transform: rotate(90deg); }
.api-docs > summary:hover { color: var(--link); }
.api-docs > summary:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
}
.api-docs > *:not(summary) { margin-top: 1rem; }
.flash-messages {
    margin-bottom: 1rem;
}
.flash-message {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    background-color: var(--flash-bg);
    color: var(--flash-color);
    border: 1px solid var(--flash-border);
    transition: all 0.3s ease;
}

.hastebin-section {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--hastebin-bg);
    border-radius: 6px;
    border: 1px solid var(--hastebin-border);
    transition: all 0.3s ease;
}
.hastebin-section label {
    font-weight: 600;
    color: var(--link);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.hastebin-section input[type="checkbox"] {
    margin: 0;
    transform: scale(1.1);
}
.hastebin-section p {
    margin: 0.5rem 0 0 1.5rem;
    font-size: 0.9rem;
    color: var(--accent);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 768px) {
    header {
        padding: 1.5rem;
    }
    .main-container {
        padding: 1.5rem;
        margin: 0 0.5rem 1rem 0.5rem;
    }
}

.button-group {
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
    background-color: var(--button-secondary);
}
.button-group h4 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: var(--accent);
}
.button-category {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

button[type="submit"] {
    font-weight: 500;
    padding: 0.6rem 1rem;
    border-radius: 4px;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
button[type="submit"][name="output_format"][value="docx"] {
    background-color: #0066cc;
    color: white;
}
button[type="submit"][name="output_format"][value="docx"]:hover {
    background-color: #0055aa;
}
button[type="submit"][name="output_format"][value="html"] {
    background-color: #f0f0f0;
    color: #333;
    border: 1px solid #ddd;
}
button[type="submit"][name="output_format"][value="html"]:hover {
    background-color: #e5e5e5;
    border-color: #ccc;
}
[data-theme="dark"] button[type="submit"][name="output_format"][value="html"] {
    background-color: #2a2a2a;
    color: #e0e0e0;
    border: 1px solid #444;
}
[data-theme="dark"] button[type="submit"][name="output_format"][value="html"]:hover {
    background-color: #3a3a3a;
    border-color: #555;
}