:root{--orange-50: #FFF7ED;--orange-100: #FFEDD5;--orange-200: #FED7AA;--orange-300: #FDBA74;--orange-400: #FB923C;--orange-500: #F97316;--orange-600: #EA580C;--orange-700: #C2410C;--stone-50: #FAFAF9;--stone-100: #F5F5F4;--stone-200: #E7E5E4;--stone-300: #D6D3D1;--stone-400: #A8A29E;--stone-500: #78716C;--stone-600: #57534E;--stone-700: #44403C;--stone-800: #292524;--stone-900: #1C1917;--bg-app: #FFFBF7;--bg-sidebar: #FFF4E8;--bg-sidebar-hover: #FFE8CC;--bg-chat: #FFFBF7;--bg-input-bar: #FFFFFF;--bg-input-field: #FFF8F2;--bg-user-msg: var(--orange-500);--bg-bot-msg: #FFFFFF;--bg-welcome-card: #FFFFFF;--text-primary: #1C1917;--text-secondary: #57534E;--text-muted: #A8A29E;--text-on-orange: #FFFFFF;--text-accent: var(--orange-600);--border-light: #FED7AA;--border-medium: #FDBA74;--border-input: #FED7AA;--border-focus: var(--orange-500);--shadow-xs: 0 1px 3px rgba(249,115,22,.08);--shadow-sm: 0 2px 8px rgba(249,115,22,.1);--shadow-md: 0 4px 20px rgba(249,115,22,.13);--shadow-lg: 0 8px 40px rgba(249,115,22,.16);--shadow-xl: 0 16px 60px rgba(249,115,22,.2);--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px;--radius-full: 9999px;--sidebar-width: 260px;--summary-width: 340px;--input-bar-height: 90px;--header-height: 60px;--font-ui: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-bangla: "Noto Sans Bengali", "Inter", sans-serif;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-in: cubic-bezier(.4, 0, 1, 1);--ease-inout: cubic-bezier(.4, 0, .2, 1);--dur-fast: .15s;--dur-med: .25s;--dur-slow: 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var(--dur-fast);font-size:16px}.input-action-btn:hover{background:var(--orange-100);color:var(--orange-600)}.input-action-btn.recording{background:#fee2e2;color:#dc2626;animation:recordingPulse 1.2s ease-in-out infinite}@keyframes recordingPulse{0%,to{box-shadow:0 0 #dc26264d}50%{box-shadow:0 0 0 6px #dc262600}}.send-btn{width:36px;height:36px;border-radius:var(--radius-md);border:none;background:linear-gradient(135deg,var(--orange-500),var(--orange-600));color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--dur-fast) var(--ease-out);box-shadow:var(--shadow-sm)}.send-btn:hover:not(:disabled){transform:scale(1.05);box-shadow:var(--shadow-md);background:linear-gradient(135deg,var(--orange-600),var(--orange-700))}.send-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}.input-hint{font-size:10.5px;color:var(--text-muted);text-align:center;margin-top:8px;font-family:var(--font-bangla)}.input-hint 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var(--dur-fast)}.summary-panel-close:hover{background:#ffffff40}.summary-file-chip{display:flex;align-items:center;gap:6px;background:#fff3;border:1px solid rgba(255,255,255,.3);border-radius:var(--radius-sm);padding:5px 10px;font-size:11px;color:#fff;font-family:var(--font-ui);font-weight:500;width:fit-content}.summary-stats{display:flex;gap:12px;margin-top:8px}.summary-stat{display:flex;align-items:center;gap:4px;font-size:10.5px;color:#ffffffd9;font-family:var(--font-ui)}.summary-panel-body{flex:1;overflow-y:auto;padding:16px}.summary-section-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);margin-bottom:10px;display:flex;align-items:center;gap:6px}.summary-text{font-size:13.5px;line-height:1.85;color:var(--text-primary);font-family:var(--font-bangla);background:var(--orange-50);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:14px;white-space:pre-wrap}.summary-panel-footer{padding:12px 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16px;font-size:12px;color:var(--orange-700);display:flex;align-items:center;gap:8px;font-family:var(--font-bangla);max-width:860px;margin:12px auto 0}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.sidebar,.summary-panel{display:none}.welcome-cards{grid-template-columns:1fr;max-width:320px}}