:root{color-scheme:light;--bg: #f7f7fb;--card: #ffffff;--text: #1f2933;--muted: #5f6b7a;--accent: #2563eb;--border: #e5e7eb;--shadow: 0 8px 24px rgba(0, 0, 0, .06)}*{box-sizing:border-box}body{margin:0;font-family:Noto Sans KR,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg)}.page{max-width:900px;margin:0 auto;padding:24px 16px 48px;display:grid;gap:16px}.form-card,.list-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.title{margin:0 0 12px;font-size:24px}.subtitle{margin:0;font-size:18px}.form{display:grid;gap:12px}.field{display:grid;gap:6px}.label{font-weight:600;color:var(--muted)}input,textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:12px;font-size:15px;transition:border-color .15s ease,box-shadow .15s ease;background:#fff;color:var(--text)}input:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #2563eb26}.submit-btn{padding:12px;font-size:16px;background:var(--accent);color:#fff;border:none;border-radius:10px;cursor:pointer;font-weight:700;transition:transform .1s ease,box-shadow .15s ease;box-shadow:0 10px 20px #2563eb40}.submit-btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px #2563eb4d}.submit-btn:active{transform:translateY(0)}.list-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.count{color:var(--muted);font-size:14px}.post-list{max-height:440px;overflow-y:auto;display:grid;gap:12px;padding-right:4px}.post{border:1px solid var(--border);border-radius:12px;padding:12px 12px 10px;background:#fff;display:grid;gap:6px}.post-header{display:flex;align-items:center;gap:8px;font-weight:700}.author{color:var(--text)}.timestamp{font-size:12px;color:var(--muted)}.content{margin:0;line-height:1.45;white-space:pre-wrap;word-break:break-word}@media(min-width:768px){.page{grid-template-columns:1fr 1.1fr}.form-card{position:sticky;top:16px;align-self:start}}