.snackbar{position:fixed;bottom:1.5rem;left:50%;transform:translate(-50%) translateY(calc(100% + 1.5rem));padding:.6rem 1.25rem;border-radius:.5rem;font-size:.875rem;font-weight:500;color:#fff;box-shadow:0 4px 12px #00000026,0 2px 4px #0000001a;opacity:0;transition:transform .25s ease,opacity .25s ease;pointer-events:none;white-space:nowrap;z-index:1000}.snackbar--visible{opacity:1;transform:translate(-50%) translateY(0)}.snackbar--success{background:#22c55e}.snackbar--error{background:#ef4444}.snackbar--info{background:#3b82f6}:root{--color-bg: #f1f5f9;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text: #1e293b;--color-text-muted: #64748b;--color-header-bg: #1e293b;--color-header-text: #f1f5f9;--color-accent: #3b82f6;--color-accent-hover: #2563eb;--color-code-bg: #f1f5f9;--color-blockquote-bg: #eff6ff;--color-table-even: #f8fafc;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace, "Courier New", monospace;--radius: .5rem}html.dark{--color-bg: #111111;--color-surface: #1a1a1a;--color-border: #2e2e2e;--color-text: #e2e8f0;--color-text-muted: #94a3b8;--color-header-bg: #0a0a0a;--color-header-text: #f1f5f9;--color-code-bg: #222222;--color-blockquote-bg: #1a2234;--color-table-even: #1f1f1f}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased}.markdown-container{display:flex;flex-direction:column;height:100vh;min-width:768px;overflow:hidden}.markdown-header{display:flex;align-items:center;padding:0 1.5rem;height:3.25rem;background:var(--color-header-bg);border-bottom:1px solid rgba(255,255,255,.06);flex-shrink:0}.markdown-header h1{font-size:.9375rem;font-weight:600;color:var(--color-header-text);letter-spacing:.01em;flex:1}.header-home-link{font-size:.75rem;font-weight:500;color:#f1f5f980;text-decoration:none;letter-spacing:.03em;margin-right:1rem;transition:color .15s ease}.header-home-link:hover{color:var(--color-header-text)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;font-size:1rem;background:transparent;border:1px solid rgba(255,255,255,.15);border-radius:.375rem;color:var(--color-header-text);cursor:pointer;transition:background .15s ease}.theme-toggle:hover{background:#ffffff1a}.theme-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.markdown-main{flex:1;display:flex;gap:.75rem;padding:.75rem;overflow:hidden;min-height:0}.tablet{flex:1;display:flex;flex-direction:column;min-height:0;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);overflow:hidden;box-shadow:0 1px 3px #0000000f,0 1px 2px #0000000a}.tablet-header{display:flex;align-items:center;justify-content:space-between;padding:.4rem .875rem;font-size:.6875rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--color-text-muted);background:var(--color-code-bg);border-bottom:1px solid var(--color-border);flex-shrink:0}textarea{flex:1;width:100%;height:100%;padding:1rem 1.25rem;border:none;outline:none;resize:none;font-family:var(--font-mono);font-size:.875rem;line-height:1.8;color:var(--color-text);background:var(--color-surface);-moz-tab-size:2;tab-size:2;caret-color:var(--color-accent);overflow-y:auto}textarea::placeholder{color:#cbd5e1}textarea:focus{outline:none;box-shadow:inset 0 0 0 2px var(--color-accent)}.preview-content{flex:1;padding:1rem 1.5rem;overflow-y:auto;font-size:.9375rem;line-height:1.75;color:var(--color-text)}.preview-content h1,.preview-content h2,.preview-content h3,.preview-content h4,.preview-content h5,.preview-content h6{margin-top:1.5em;margin-bottom:.5em;font-weight:700;line-height:1.3;color:var(--color-text)}.preview-content>:first-child{margin-top:0}.preview-content h1{font-size:1.75rem}.preview-content h2{font-size:1.375rem;border-bottom:1px solid var(--color-border);padding-bottom:.3em}.preview-content h3{font-size:1.125rem}.preview-content p{margin-bottom:1em}.preview-content a{color:var(--color-accent);text-decoration:underline;text-underline-offset:2px}.preview-content a:hover{color:var(--color-accent-hover)}.preview-content ul,.preview-content ol{margin-bottom:1em;padding-left:1.5em}.preview-content li{margin-bottom:.25em}.preview-content code{font-family:var(--font-mono);font-size:.85em;background:var(--color-code-bg);border:1px solid var(--color-border);border-radius:.25rem;padding:.1em .35em}.preview-content pre{background:#1e293b;border-radius:var(--radius);padding:1rem 1.25rem;overflow-x:auto;margin-bottom:1em}.preview-content pre code{background:none;border:none;color:#e2e8f0;padding:0;font-size:.875rem}.preview-content blockquote{border-left:3px solid var(--color-accent);margin:0 0 1em;padding:.5em 1em;background:var(--color-blockquote-bg);border-radius:0 var(--radius) var(--radius) 0;color:var(--color-text-muted)}.preview-content blockquote p{margin-bottom:0}.preview-content hr{border:none;border-top:1px solid var(--color-border);margin:1.5em 0}.preview-content table{width:100%;border-collapse:collapse;margin-bottom:1em;font-size:.9em}.preview-content th{background:var(--color-code-bg);font-weight:600;text-align:left;padding:.5em .75em;border:1px solid var(--color-border)}.preview-content td{padding:.5em .75em;border:1px solid var(--color-border)}.preview-content tr:nth-child(2n) td{background:var(--color-table-even)}.preview-content img{max-width:100%;border-radius:var(--radius)}.export-buttons{display:flex;gap:6px}.download-btn{display:inline-flex;align-items:center;padding:.3rem .75rem;font-size:.6875rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:#fff;background:var(--color-accent);border:none;border-radius:.375rem;cursor:pointer;transition:background .15s ease}.download-btn:hover{background:var(--color-accent-hover)}.download-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}