:root{--primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--primary-color: #667eea;--primary-hover: #5a6fd6;--secondary-color: #764ba2;--accent-color: #f093fb;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-input: #f1f5f9;--text-primary: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-radius: 12px;--border-radius-lg: 16px;--border-radius-xl: 24px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.6;color:var(--text-primary);background:var(--bg-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-container{min-height:100vh;background:linear-gradient(180deg,#f8fafc,#e2e8f0);position:relative;overflow-x:hidden}.app-container:before{content:"";position:absolute;top:0;left:0;right:0;height:400px;background:var(--primary-gradient);z-index:0}.content-wrapper{position:relative;z-index:1;max-width:900px;margin:0 auto;padding:2rem 1.5rem 4rem}.app-header{text-align:center;padding:2.5rem 0 3rem;color:#fff}.app-logo{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;margin-bottom:1.25rem;font-size:2rem}.app-title{font-size:2.25rem;font-weight:700;letter-spacing:-.025em;margin-bottom:.5rem;text-shadow:0 2px 4px rgba(0,0,0,.1)}.app-subtitle{font-size:1.1rem;font-weight:400;opacity:.9}.user-info{display:flex;align-items:center;justify-content:center;gap:.75rem;margin-top:1rem;padding:.75rem 1rem;background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--border-radius);max-width:fit-content;margin-left:auto;margin-right:auto}.user-avatar{width:32px;height:32px;border-radius:50%;border:2px solid rgba(255,255,255,.5)}.user-email{font-size:.875rem;color:#ffffffe6}.btn-logout{padding:.375rem .75rem;font-size:.75rem;background:#fff3;border:1px solid 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1rem;border-radius:var(--border-radius);margin-bottom:1.5rem;font-size:.875rem}#google-signin-button{display:flex;justify-content:center}.card{background:var(--bg-card);border-radius:var(--border-radius-xl);box-shadow:var(--shadow-xl);padding:2.5rem;margin-bottom:1.5rem}.form-container{display:flex;flex-direction:column;gap:1.5rem}.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}@media (max-width: 640px){.form-row{grid-template-columns:1fr}}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-label{font-size:.875rem;font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:.5rem}.form-label .required{color:var(--error-color)}.form-label .optional{font-weight:400;color:var(--text-muted);font-size:.75rem}.form-input,.form-textarea{width:100%;padding:.875rem 1rem;font-size:.9375rem;font-family:inherit;color:var(--text-primary);background:var(--bg-input);border:2px solid transparent;border-radius:var(--border-radius);transition:all var(--transition-fast);outline:none}.form-input:hover,.form-textarea:hover{background:#e8ecf2}.form-input:focus,.form-textarea:focus{background:var(--bg-secondary);border-color:var(--primary-color);box-shadow:0 0 0 4px #667eea26}.form-input::placeholder,.form-textarea::placeholder{color:var(--text-muted)}.form-textarea{resize:vertical;min-height:100px}.file-input-wrapper{position:relative}.file-input-label{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:1.25rem;background:var(--bg-input);border:2px dashed var(--border-color);border-radius:var(--border-radius);cursor:pointer;transition:all var(--transition-fast);text-align:center}.file-input-label:hover{border-color:var(--primary-color);background:#667eea0d}.file-input-label.has-file{border-color:var(--success-color);background:#10b9810d}.file-input-icon{font-size:1.5rem}.file-input-text{font-size:.875rem;color:var(--text-secondary)}.file-input-text strong{color:var(--primary-color)}.file-input{position:absolute;width:100%;height:100%;top:0;left:0;opacity:0;cursor:pointer}.provider-selector{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}@media (max-width: 500px){.provider-selector{grid-template-columns:1fr}}.provider-option{display:flex;align-items:center;gap:.75rem;padding:1rem;background:var(--bg-input);border:2px solid transparent;border-radius:var(--border-radius);cursor:pointer;transition:all var(--transition-fast)}.provider-option:hover{background:#e8ecf2;border-color:var(--border-color)}.provider-option.selected{background:#667eea14;border-color:var(--primary-color)}.provider-option input[type=radio]{display:none}.provider-icon{font-size:1.5rem;flex-shrink:0}.provider-info{display:flex;flex-direction:column;gap:.125rem}.provider-info strong{font-size:.875rem;color:var(--text-primary)}.provider-info small{font-size:.75rem;color:var(--text-muted)}.provider-option.selected .provider-info strong{color:var(--primary-color)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.875rem 1.5rem;font-size:.9375rem;font-weight:600;font-family:inherit;border:none;border-radius:var(--border-radius);cursor:pointer;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 14px #667eea66}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:var(--bg-input);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--border-color);border-color:var(--text-muted)}.btn-outline{background:transparent;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-outline:hover:not(:disabled){background:var(--primary-color);color:#fff}.btn-success{background:var(--success-color);color:#fff}.btn-full{width:100%}.btn-lg{padding:1rem 2rem;font-size:1rem}.btn-loading{position:relative;color:transparent!important}.btn-loading:after{content:"";position:absolute;width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.results-container{margin-top:2rem;animation:fadeInUp .5s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.result-section{background:var(--bg-card);border-radius:var(--border-radius-xl);box-shadow:var(--shadow-lg);margin-bottom:1.5rem;overflow:hidden}.result-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.25rem 1.5rem;background:linear-gradient(135deg,#f8fafc,#f1f5f9);border-bottom:1px solid var(--border-color)}.result-title{display:flex;align-items:center;gap:.75rem;font-size:1rem;font-weight:600;color:var(--text-primary);margin:0}.result-badge{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--primary-gradient);color:#fff;font-size:.8rem;font-weight:700;border-radius:8px}.result-actions{display:flex;gap:.5rem;flex-wrap:wrap}.ai-response-section{padding:1.5rem;font-size:.9375rem;line-height:1.7;color:var(--text-secondary)}.ai-response-section h1,.ai-response-section h2,.ai-response-section h3,.ai-response-section h4{color:var(--text-primary);margin-top:1.5rem;margin-bottom:.75rem;font-weight:600}.ai-response-section h1:first-child,.ai-response-section h2:first-child,.ai-response-section h3:first-child{margin-top:0}.ai-response-section p{margin-bottom:1rem}.ai-response-section p:last-child{margin-bottom:0}.ai-response-section ul,.ai-response-section ol{margin:1rem 0;padding-left:1.5rem}.ai-response-section li{margin-bottom:.5rem}.ai-response-section ul:last-child,.ai-response-section ol:last-child{margin-bottom:0}.ai-response-section ul:last-child>li:last-child,.ai-response-section ol:last-child>li:last-child{margin-bottom:0}.ai-response-section strong{color:var(--text-primary);font-weight:600}.ai-response-section a{color:var(--primary-color);text-decoration:none}.ai-response-section a:hover{text-decoration:underline}.btn-copy{padding:.5rem 1rem;font-size:.8125rem;background:#fff;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:8px}.btn-copy:hover:not(:disabled){background:var(--bg-input);color:var(--text-primary);border-color:var(--text-muted)}.btn-copy.copied{background:var(--success-color);color:#fff;border-color:var(--success-color)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-pulse{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}@media (max-width: 768px){.content-wrapper{padding:1.5rem 1rem 3rem}.card{padding:1.5rem;border-radius:var(--border-radius-lg)}.app-title{font-size:1.75rem}.result-header{flex-direction:column;align-items:flex-start}.result-actions{width:100%}.result-actions .btn-copy{flex:1}}