.chat-container{display:flex;flex-direction:column;height:100vh;max-width:980px;margin:0 auto;background:#fffcf7e6;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;transition:all var(--transition);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.chat-header{background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);color:#fff;padding:22px 30px;text-align:center;box-shadow:var(--shadow);position:relative;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:all var(--transition)}.chat-header h1{margin:0;font-size:1.8rem;font-weight:600;letter-spacing:.5px;display:flex;align-items:center;justify-content:center;gap:12px}.chat-header h1:before{content:"🏛️";font-size:2rem}.chat-header p{margin:8px 0 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#0000001a}.history-item-code{font-weight:700;color:var(--c-text);font-size:.95rem;margin-bottom:4px}.history-item-desc{font-size:.82rem;color:var(--c-text-soft);line-height:1.4;margin-bottom:6px}.history-item-meta{display:flex;justify-content:space-between;font-size:.75rem;color:#9ca3af;margin-bottom:6px}.history-item-confidence{font-weight:600;color:var(--c-primary)}.history-pdf-btn{display:inline-block;padding:4px 12px;background:var(--c-primary);color:#fff;border:none;border-radius:var(--radius);font-size:.75rem;cursor:pointer;transition:all var(--transition)}.history-pdf-btn:hover{background:var(--c-primary-dark);transform:translateY(-1px)}.history-empty{text-align:center;color:#9ca3af;padding:30px 10px;font-size:.9rem}.history-toggle-btn{width:40px;height:40px;min-width:40px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:#ffffff1a;color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:background 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