/* =============================
   Markdown → HTML Converter
   DARTH VADER EDITION
   ============================= */

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

:root {
    --bg-primary: #050505;
    --bg-card: rgba(12, 12, 12, 0.85);
    --bg-panel: rgba(8, 8, 8, 0.95);
    --border: rgba(200, 30, 30, 0.12);
    --border-hover: rgba(200, 30, 30, 0.35);
    --text-primary: #d4d4d4;
    --text-secondary: #707070;
    --text-muted: #444444;
    --accent: #c41e1e;
    --accent-light: #e03030;
    --accent-dark: #8b1515;
    --steel: #2a2a2a;
    --green: #22c55e;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 8px;
    --radius-sm: 6px;
    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: linear-gradient(rgba(200, 30, 30, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(200, 30, 30, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
}

.glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(180px);
    opacity: 0.06;
    pointer-events: none;
    z-index: 0;
}

.glow-1 {
    background: var(--accent);
    top: -250px;
    left: -150px;
}

.glow-2 {
    background: var(--accent-dark);
    bottom: -250px;
    right: -150px;
}

header {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    background: rgba(5, 5, 5, 0.9);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

nav {
    display: flex;
    gap: 24px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color var(--transition);
}

nav a:hover {
    color: var(--accent-light);
}

main {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.hero {
    text-align: center;
    margin-bottom: 48px;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 4px;
    background: rgba(200, 30, 30, 0.08);
    border: 1px solid rgba(200, 30, 30, 0.2);
    color: var(--accent-light);
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.accent {
    color: var(--accent-light);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Converter Card */
.converter-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
}

.converter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-dark), transparent);
    opacity: 0.6;
    z-index: 1;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--steel);
    background: rgba(200, 30, 30, 0.02);
}

.view-tabs {
    display: flex;
    gap: 0;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    padding: 2px;
}

.view-tab {
    padding: 6px 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: 4px;
    transition: all var(--transition);
}

.view-tab.active {
    color: var(--text-primary);
    background: rgba(200, 30, 30, 0.12);
}

.toolbar-actions {
    display: flex;
    gap: 6px;
}

.icon-btn {
    padding: 6px 12px;
    background: rgba(200, 30, 30, 0.06);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    transition: all var(--transition);
}

.icon-btn:hover {
    background: rgba(200, 30, 30, 0.12);
    color: var(--text-primary);
    border-color: rgba(200, 30, 30, 0.3);
}

.icon-btn.success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--green);
    border-color: rgba(34, 197, 94, 0.25);
}

/* Panels */
.panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 500px;
}

.panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--steel);
}

.panel:last-child {
    border-right: none;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 18px;
    border-bottom: 1px solid var(--steel);
    background: rgba(200, 30, 30, 0.03);
}

.panel-header h2 {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-light);
}

.stats {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Editor */
.editor-panel textarea {
    flex: 1;
    padding: 18px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    resize: none;
    outline: none;
    tab-size: 2;
}

.editor-panel textarea::placeholder {
    color: var(--text-muted);
}

.editor-panel textarea::-webkit-scrollbar {
    width: 4px;
}

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

.editor-panel textarea::-webkit-scrollbar-thumb {
    background: rgba(200, 30, 30, 0.2);
    border-radius: 2px;
}

/* Output */
.output-wrap {
    flex: 1;
    overflow-y: auto;
    position: relative;
}

.output-wrap::-webkit-scrollbar {
    width: 4px;
}

.output-wrap::-webkit-scrollbar-track {
    background: transparent;
}

.output-wrap::-webkit-scrollbar-thumb {
    background: rgba(200, 30, 30, 0.2);
    border-radius: 2px;
}

.preview-content {
    padding: 18px;
    min-height: 100%;
}

.preview-content.hidden,
.html-source.hidden {
    display: none;
}

.html-source {
    width: 100%;
    height: 100%;
    padding: 18px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    resize: none;
    outline: none;
}

/* Preview Content Styles */
.preview-content h1 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: -0.01em;
    border-bottom: 1px solid var(--steel);
    padding-bottom: 10px;
}

.preview-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 24px 0 12px;
    color: var(--text-primary);
    text-transform: uppercase;
}

.preview-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 20px 0 10px;
    color: var(--text-primary);
}

.preview-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 16px 0 8px;
}

.preview-content p {
    margin-bottom: 12px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.preview-content strong {
    color: var(--text-primary);
}

.preview-content em {
    font-style: italic;
}

.preview-content a {
    color: var(--accent-light);
    text-decoration: none;
}

.preview-content a:hover {
    text-decoration: underline;
}

.preview-content ul,
.preview-content ol {
    margin: 0 0 16px 24px;
    color: var(--text-secondary);
}

.preview-content li {
    margin-bottom: 6px;
    line-height: 1.6;
}

.preview-content blockquote {
    border-left: 3px solid var(--accent);
    padding: 12px 18px;
    margin: 16px 0;
    background: rgba(200, 30, 30, 0.04);
    color: var(--text-secondary);
}

.preview-content code {
    background: rgba(200, 30, 30, 0.08);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent-light);
}

.preview-content pre {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin: 16px 0;
    overflow-x: auto;
}

.preview-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.8rem;
    line-height: 1.6;
}

.preview-content hr {
    border: none;
    border-top: 1px solid var(--steel);
    margin: 24px 0;
}

.preview-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.preview-content th {
    background: rgba(200, 30, 30, 0.06);
    padding: 10px 14px;
    text-align: left;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: 1px solid var(--steel);
}

.preview-content td {
    padding: 10px 14px;
    border: 1px solid var(--steel);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.preview-content img {
    max-width: 100%;
    border-radius: var(--radius-sm);
}

.preview-content input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--accent);
}

/* Features */
.features {
    margin-top: 80px;
    text-align: center;
}

.features h2 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
    text-transform: uppercase;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--steel);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 1.4rem;
    margin-bottom: 14px;
}

.feature-card h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* FAQ */
.faq {
    margin-top: 80px;
}

.faq h2 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    margin-bottom: 32px;
    text-align: center;
    text-transform: uppercase;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item summary {
    padding: 16px 20px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--accent);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 20px 16px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

footer {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 32px;
    border-top: 1px solid var(--steel);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

footer strong {
    color: var(--accent-light);
}

@media (max-width: 800px) {
    header {
        padding: 16px 20px;
    }

    main {
        padding: 24px 16px 60px;
    }

    .panels {
        grid-template-columns: 1fr;
    }

    .panel {
        min-height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--steel);
    }

    .toolbar {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }

    .toolbar-actions {
        flex-wrap: wrap;
    }
}