.app{display:flex;min-height:100vh}.sidebar{width:260px;min-width:260px;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-right:1px solid var(--glass-border);display:flex;flex-direction:column;transition:transform var(--duration-slow) var(--ease-out);z-index:20}.sidebar-nav{display:flex;flex-direction:column;padding:8px;gap:4px;flex-shrink:0;border-bottom:1px solid var(--border)}.sidebar-nav-btn{width:100%;padding:12px 14px;font-size:.78rem;font-weight:600;color:var(--text-secondary);background:transparent;border:none;border-left:3px solid transparent;border-radius:var(--radius-sm);transition:all var(--duration-fast) 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var(--ease-out)}.history-item:hover{background:var(--surface-1);border-color:var(--blue);transform:translate(2px)}.sidebar-usecase-active{padding:12px 14px;background:#4285f40f;border:1px solid rgba(66,133,244,.15);border-radius:var(--radius-sm);font-size:.78rem;color:var(--blue);font-weight:600;text-align:center;margin-bottom:12px}.sidebar-lim-hint{font-size:.72rem;color:var(--text-tertiary);margin-bottom:10px;line-height:1.5}.sidebar-lim-chips{display:flex;flex-wrap:wrap;gap:5px}.sidebar-lim-chip{padding:5px 10px;font-size:.68rem;font-weight:600;color:var(--text-secondary);background:var(--surface-0);border:1px solid var(--border-strong);border-radius:var(--radius-pill);transition:all var(--duration-fast) var(--ease-out)}.sidebar-lim-chip:hover{background:var(--surface-1);border-color:var(--blue);color:var(--blue)}.sidebar-lim-chip-active{background:#4285f41a!important;border-color:var(--blue)!important;color:var(--blue)!important}.main{flex:1;display:flex;flex-direction:column;min-width:0}.header{display:flex;align-items:center;gap:14px;padding:16px 28px;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-bottom:1px solid var(--border);position:sticky;top:0;z-index:15;animation:fadeDown .5s var(--ease-out)}.logo{flex-shrink:0}.app-title{margin:0;font-size:1.2rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.title-accent{color:var(--blue)}.hero{padding:40px 28px 28px;text-align:center;animation:fadeUp .6s var(--ease-out) .1s both}.hero-title{margin:0 0 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scale(.99);box-shadow:none}.submit-btn:disabled{opacity:.7;cursor:not-allowed}.progress-stepper{display:flex;flex-direction:column;gap:0;padding:32px;animation:fadeUp .4s var(--ease-out)}.progress-step{display:flex;align-items:flex-start;gap:14px;padding:12px 0;position:relative}.progress-step-indicator{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:.7rem;font-weight:700;transition:all var(--duration-med) var(--ease-out);position:relative;z-index:2}.progress-step-pending .progress-step-indicator{background:var(--surface-1);border:2px solid var(--border-strong);color:var(--text-tertiary)}.progress-step-active .progress-step-indicator{background:var(--gradient-brand);border:none;color:#fff;animation:pulse-ring 1.5s ease-in-out infinite}.progress-step-done .progress-step-indicator{background:var(--gradient-success);border:none;color:#fff}.progress-step-connector{position:absolute;left:13px;top:40px;width:2px;height:calc(100% - 16px);background:var(--border-strong);z-index:1}.progress-step-done .progress-step-connector{background:var(--green)}.progress-step:last-child .progress-step-connector{display:none}.progress-step-text{padding-top:4px}.progress-step-label{font-size:.85rem;font-weight:600;color:var(--text-primary)}.progress-step-active .progress-step-label{color:var(--blue)}.progress-step-pending .progress-step-label{color:var(--text-tertiary)}.progress-step-desc{font-size:.75rem;color:var(--text-tertiary);margin-top:2px}.skeleton{background:linear-gradient(90deg,var(--surface-1) 25%,var(--surface-0) 50%,var(--surface-1) 75%);background-size:200% 100%;animation:skeleton-pulse 1.5s ease-in-out 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