:root{--bg:#f4efe7;--bg-accent:#e8f0e5;--panel:rgba(255,252,247,0.9);--panel-strong:#fff9f0;--text:#1f2933;--muted:#607080;--brand:#1e7a5d;--brand-dark:#14503e;--line:rgba(31,41,51,0.12);--danger:#b24432;--shadow:0 24px 60px rgba(26,35,44,0.12)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;color:var(--text);background:radial-gradient(circle at top left,rgba(30,122,93,.18),transparent 30%),radial-gradient(circle at bottom right,rgba(196,145,73,.16),transparent 30%),linear-gradient(160deg,var(--bg),var(--bg-accent));font-family:Segoe UI,Helvetica Neue,sans-serif}body{min-height:100vh}button,input,textarea{font:inherit}.page-shell{min-height:100vh;padding:24px}.page-grid{display:grid;grid-template-columns:minmax(0,960px);justify-content:center}.chat-app{display:grid;grid-template-columns:320px minmax(0,1fr);grid-gap:20px;gap:20px;align-items:start}.chat-panel,.sidebar{border:1px solid var(--line);background:var(--panel);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:var(--shadow)}.sidebar{border-radius:28px;padding:22px}.brand-mark{display:inline-flex;align-items:center;gap:10px;padding:8px 12px;border-radius:999px;background:rgba(30,122,93,.08);color:var(--brand-dark);font-size:14px;font-weight:700}.sidebar h1{margin:18px 0 10px;font-size:clamp(30px,4vw,42px);line-height:1}.sidebar p{margin:0 0 18px;color:var(--muted);line-height:1.5}.chip-list,.feature-list,.price-list{display:flex;flex-wrap:wrap;gap:10px}.feature-chip,.prompt-chip{border-radius:999px;padding:10px 14px;border:1px solid rgba(30,122,93,.14);background:rgba(255,255,255,.72)}.feature-chip{font-size:14px}.price-card{width:100%;padding:14px 16px;border-radius:18px;background:var(--panel-strong);border:1px solid rgba(31,41,51,.08)}.price-card strong,.section-title{display:block;margin-bottom:6px}.chat-panel{border-radius:32px;overflow:hidden}.chat-header{display:flex;justify-content:space-between;gap:20px;padding:20px 22px;border-bottom:1px solid var(--line);background:rgba(255,249,240,.9)}.chat-header h2,.chat-header p{margin:0}.status-pill{white-space:nowrap;align-self:start;border-radius:999px;padding:10px 14px;background:rgba(30,122,93,.1);color:var(--brand-dark);font-size:14px;font-weight:700}.messages{flex-direction:column;gap:14px;padding:20px;min-height:520px;max-height:64vh;overflow:auto}.message-row,.messages{display:flex}.message-row.user{justify-content:flex-end}.message-bubble{max-width:min(80%,640px);padding:14px 16px;border-radius:22px;line-height:1.5;white-space:pre-wrap;box-shadow:0 10px 24px rgba(31,41,51,.08)}.message-row.assistant .message-bubble{background:#fff;border-top-left-radius:8px}.message-row.user .message-bubble{background:linear-gradient(135deg,var(--brand),#28946f);color:#fff;border-top-right-radius:8px}.meta-line{margin-top:8px;color:inherit;opacity:.7;font-size:12px}.typing-indicator{display:inline-flex;gap:6px;align-items:center}.typing-indicator span{width:8px;height:8px;border-radius:999px;background:var(--brand);animation:blink 1.2s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes blink{0%,80%,to{transform:scale(.7);opacity:.4}40%{transform:scale(1);opacity:1}}.composer{border-top:1px solid var(--line);padding:18px 20px 22px;background:rgba(255,255,255,.72)}.composer-form{display:grid;grid-gap:12px;gap:12px}.composer-row{display:grid;grid-template-columns:1fr auto;grid-gap:12px;gap:12px}.composer textarea{width:100%;min-height:96px;max-height:220px;resize:vertical;border:1px solid rgba(31,41,51,.14);border-radius:18px;padding:14px 16px;background:#fffefb;color:var(--text)}.composer button,.prompt-chip{cursor:pointer}.composer button{min-width:148px;border:0;border-radius:18px;padding:14px 18px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;font-weight:700;transition:transform .14s ease,opacity .14s ease}.composer button:disabled{cursor:not-allowed;opacity:.7}.composer button:not(:disabled):hover{transform:translateY(-1px)}.error-banner{border-radius:16px;padding:12px 14px;background:rgba(178,68,50,.08);color:var(--danger)}.footer-note{font-size:13px;color:var(--muted)}@media (max-width:920px){.chat-app{grid-template-columns:1fr}.messages{min-height:420px}}@media (max-width:640px){.page-shell{padding:12px}.chat-panel,.sidebar{border-radius:24px}.chat-header,.composer{padding-inline:16px}.messages{padding:16px;max-height:none;min-height:360px}.composer-row{grid-template-columns:1fr}.composer button{width:100%}.message-bubble{max-width:92%}}