:root{--color-primary-50:#e8f0f8;--color-primary-100:#c5d9ec;--color-primary-200:#9fc0df;--color-primary-300:#78a7d2;--color-primary-400:#5b93c8;--color-primary-500:#4476aa;--color-primary-600:#3d6ea3;--color-primary-700:#34639a;--color-primary-800:#2c5991;--color-primary-900:#1e4680;--color-neutral-50:#fafafa;--color-neutral-100:#f5f5f5;--color-neutral-200:#e5e5e5;--color-neutral-300:#d4d4d4;--color-neutral-400:#a3a3a3;--color-neutral-500:#737373;--color-neutral-600:#525252;--color-neutral-700:#404040;--color-neutral-800:#262626;--color-neutral-900:#171717;--color-background:#fff;--color-surface:#fafafa;--color-surface-elevated:#fff;--color-text-primary:#171717;--color-text-secondary:#525252;--color-text-tertiary:#a3a3a3;--color-text-inverse:#fff;--color-border-light:#f5f5f5;--color-border-default:#e5e5e5;--color-border-strong:#d4d4d4;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--space-0:0;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--font-family-base:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;--font-family-ja:"Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN W3",Meiryo,メイリオ,sans-serif;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-md:1.125rem;--font-size-lg:1.25rem;--font-size-xl:1.5rem;--font-size-2xl:1.875rem;--font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--line-height-tight:1.25;--line-height-normal:1.5;--line-height-relaxed:1.75;--radius-sm:.375rem;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem;--radius-2xl:1.5rem;--radius-full:9999px;--shadow-xs:0 1px 2px 0 #0000000d;--shadow-sm:0 1px 3px 0 #0000001a;--shadow-md:0 4px 6px -1px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a;--duration-instant:.1s;--duration-fast:.2s;--duration-normal:.3s;--duration-slow:.5s;--easing-standard:cubic-bezier(.4,0,.2,1);--easing-decelerate:cubic-bezier(0,0,.2,1);--easing-accelerate:cubic-bezier(.4,0,1,1);--easing-bounce:cubic-bezier(.68,-.55,.265,1.55);--z-base:0;--z-dropdown:1000;--z-sticky:1100;--z-overlay:1200;--z-modal:1300;--z-toast:1400}
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h1{font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);margin:0}.audio-btn{padding:var(--space-2)var(--space-4);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-primary-700);background-color:var(--color-primary-50);border:1px solid var(--color-primary-200);border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration-fast)var(--easing-standard);white-space:nowrap}.audio-btn:hover:not(:disabled){background-color:var(--color-primary-100);border-color:var(--color-primary-300)}.audio-btn:disabled{opacity:.5;cursor:not-allowed}.progress-bar-container{padding:var(--space-4)var(--space-6);background-color:var(--color-surface-elevated);border-bottom:1px solid var(--color-border-light);position:relative}.progress-bar-header{margin-bottom:var(--space-3);justify-content:space-between;align-items:center;display:flex}.progress-text{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary)}.progress-bar{background-color:var(--color-neutral-200);border-radius:var(--radius-full);height:4px;overflow:hidden}.progress-bar-inner{background-color:var(--color-primary-500);border-radius:var(--radius-full);height:100%;transition:width var(--duration-slow)var(--easing-standard)}.progress-diff-animation{margin-left:var(--space-2);font-size:var(--font-size-sm);font-weight:var(--font-weight-bold);color:var(--color-success);animation:diffFadeUp 1.5s var(--easing-decelerate)forwards}@keyframes diffFadeUp{0%{opacity:0;transform:translateY(4px)}20%{opacity:1;transform:translateY(0)}80%{opacity:1;transform:translateY(-4px)}to{opacity:0;transform:translateY(-8px)}}.messages{padding:var(--space-6);gap:var(--space-4);scroll-behavior:smooth;scrollbar-width:none;-ms-overflow-style:none;flex-direction:column;flex:1;display:flex;overflow-y:auto}.messages::-webkit-scrollbar{display:none}.message{gap:var(--space-2);animation:messageSlideIn var(--duration-normal)var(--easing-decelerate);flex-direction:column;display:flex}@keyframes messageSlideIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message.user{align-self:flex-end;align-items:flex-end}.message.assistant,.message.stream{align-self:flex-start;align-items:flex-start}.message-bubble{width:fit-content;max-width:80%;padding:var(--space-3)var(--space-5);border-radius:var(--radius-2xl);overflow-wrap:anywhere;word-break:normal;line-height:var(--line-height-relaxed);box-shadow:var(--shadow-sm);display:inline-block}@media (max-width:640px){.message-bubble{max-width:85%}}.message.user .message-bubble{background-color:var(--color-primary-500);color:var(--color-text-inverse);border-bottom-right-radius:var(--radius-sm)}.message.assistant .message-bubble,.message.stream .message-bubble{background-color:var(--color-neutral-100);color:var(--color-text-primary);border-bottom-left-radius:var(--radius-sm);border:1px solid var(--color-border-default)}.composer-container{padding:var(--space-6);background-color:var(--color-surface-elevated);border-top:1px solid var(--color-border-default)}.composer-form{gap:var(--space-4);flex-direction:column;max-width:800px;margin:0 auto;display:flex}.input-row{gap:var(--space-3);align-items:flex-end;display:flex}.composer-input{padding:var(--space-3)var(--space-4);font-size:var(--font-size-base);color:var(--color-text-primary);background-color:var(--color-background);border:1.5px solid var(--color-border-default);border-radius:var(--radius-xl);transition:all var(--duration-fast)var(--easing-standard);resize:none;outline:none;flex:1;min-height:48px;max-height:120px;font-family:inherit}.composer-input:disabled{background-color:var(--color-neutral-50);color:var(--color-text-tertiary);border-color:var(--color-border-light);cursor:not-allowed}.composer-input:focus{border-color:var(--color-primary-500);box-shadow:0 0 0 3px var(--color-primary-50)}.composer-input::placeholder{color:var(--color-text-tertiary)}.send-btn{border-radius:var(--radius-full);background-color:var(--color-primary-500);width:48px;height:48px;color:var(--color-text-inverse);cursor:pointer;transition:all var(--duration-fast)var(--easing-standard);box-shadow:var(--shadow-sm);border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}.send-btn:hover:not(:disabled){background-color:var(--color-primary-600);transform:scale(1.05)}.send-btn:active:not(:disabled){transform:scale(.95)}.send-btn:disabled{background-color:var(--color-neutral-200);color:var(--color-neutral-400);cursor:not-allowed;box-shadow:none}.composer-form.locked .send-btn{background-color:var(--color-neutral-200);color:var(--color-neutral-500);cursor:not-allowed;box-shadow:none}.composer-form.locked .composer-input{background-color:var(--color-neutral-50);color:var(--color-text-tertiary);border-color:var(--color-border-light)}.composer-lock-message{font-size:var(--font-size-sm);color:var(--color-text-secondary)}.speech-controls{align-items:stretch;gap:var(--space-3);flex-direction:column;display:flex}.speech-btn{width:100%;min-height:64px;padding:var(--space-4)var(--space-6);border-radius:var(--radius-xl);border:2px solid var(--color-primary-500);background-color:var(--color-background);color:var(--color-primary-500);cursor:pointer;transition:all var(--duration-normal)var(--easing-standard);box-shadow:var(--shadow-sm);justify-content:center;align-items:center;display:flex;position:relative}.speech-btn:hover:not(:disabled){background-color:var(--color-primary-50);border-color:var(--color-primary-600);box-shadow:var(--shadow-md);transform:translateY(-2px)}.speech-btn:active:not(:disabled){transform:translateY(0)}.speech-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.speech-btn.recording{background-color:var(--color-error);border-color:var(--color-error);color:var(--color-text-inverse);animation:2s ease-in-out infinite recordingPulse}@keyframes recordingPulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}.speech-btn.ai-speaking{background-color:var(--color-primary-50);border-color:var(--color-primary-500);animation:2s ease-in-out infinite aiSpeakingPulse}@keyframes aiSpeakingPulse{0%,to{opacity:1}50%{opacity:.8}}.speech-btn svg{width:32px;height:32px}.recording-progress{background-color:var(--color-neutral-200);border-radius:var(--radius-full);width:100%;height:4px;margin-top:var(--space-2);overflow:hidden}.recording-progress-bar{background-color:var(--color-error);border-radius:var(--radius-full);height:100%;transition:width .1s linear}.question-list{padding:var(--space-6);max-height:100%;overflow-y:auto}.question-list h2{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);margin-bottom:var(--space-4)}.question-card{margin-bottom:var(--space-4);padding:var(--space-4);background-color:var(--color-background);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);transition:all var(--duration-fast)var(--easing-standard)}.question-card:hover{border-color:var(--color-primary-300);box-shadow:var(--shadow-sm)}.question-card h3{font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--color-primary-600);margin-bottom:var(--space-2)}.question-card p{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);margin:var(--space-2)0}.welcome-container{min-height:100vh;padding:var(--space-6);background-color:var(--color-surface);justify-content:center;align-items:center;display:flex}.welcome-content{text-align:center;width:100%;max-width:480px;animation:formSlideIn var(--duration-slow)var(--easing-decelerate)}.welcome-avatar{width:80px;height:80px;margin:0 auto var(--space-6)}.welcome-avatar .chat-avatar{width:80px;height:80px;font-size:2.5rem}.welcome-content h1{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary);margin-bottom:var(--space-12);line-height:1.4}.welcome-notice{margin:0 auto var(--space-10);padding:var(--space-5)var(--space-6);background-color:var(--color-neutral-50);border:1px solid var(--color-border-light);border-radius:var(--radius-xl);max-width:520px;color:var(--color-text-secondary);font-size:var(--font-size-sm);line-height:var(--line-height-relaxed);text-align:left;box-shadow:var(--shadow-sm)}.welcome-notice p+p{margin-top:var(--space-2)}.welcome-btn{width:100%;max-width:320px;padding:var(--space-4)var(--space-8);font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-inverse);background-color:var(--color-primary-500);border-radius:var(--radius-xl);cursor:pointer;transition:all var(--duration-fast)var(--easing-standard);box-shadow:var(--shadow-md);border:none}.welcome-btn:hover{background-color:var(--color-primary-600);box-shadow:var(--shadow-lg);transform:translateY(-2px)}.welcome-btn:active{transform:translateY(0)}.welcome-btn:focus-visible{outline:3px solid var(--color-primary-200);outline-offset:2px}@media (max-width:640px){.welcome-content{max-width:100%}.welcome-notice{padding:var(--space-4);margin:0 auto var(--space-8);font-size:var(--font-size-sm);line-height:var(--line-height-normal)}.welcome-btn{max-width:none}}.welcome-description{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);margin-bottom:var(--space-10)}.prechat-container{min-height:100vh;padding:var(--space-6);background-color:var(--color-surface);justify-content:center;align-items:center;display:flex}.prechat-form{background-color:var(--color-surface-elevated);border:1px solid var(--color-border-default);border-radius:var(--radius-2xl);width:100%;max-width:480px;box-shadow:var(--shadow-xl);padding:var(--space-10);animation:formSlideIn var(--duration-slow)var(--easing-decelerate)}@keyframes formSlideIn{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.prechat-header{text-align:center;margin-bottom:var(--space-8)}.prefill-avatar{width:64px;height:64px;margin:0 auto var(--space-4)}.prefill-avatar .chat-avatar{width:64px;height:64px;font-size:var(--font-size-2xl)}.prechat-form h1{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary);margin-bottom:var(--space-3)}.prechat-form .muted{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:var(--line-height-relaxed)}.form-group{margin-bottom:var(--space-6)}.form-group label{font-size:var(--font-size-sm);font-weight:var(--font-weight-normal);color:var(--color-text-primary);margin-bottom:var(--space-2);display:block}.form-group input,.form-group select{width:100%;padding:var(--space-3)var(--space-2);font-size:var(--font-size-base);color:var(--color-text-primary);border:none;border-bottom:1.5px solid var(--color-border-default);transition:all var(--duration-fast)var(--easing-standard);background-color:#0000;border-radius:0;outline:none;font-family:inherit}.form-group input:focus,.form-group select:focus{border-bottom-color:var(--color-primary-500)}.form-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23525252'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--space-2)center;padding-right:var(--space-8);background-size:20px}.submit-btn{width:100%;padding:var(--space-4);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);color:var(--color-text-inverse);background-color:var(--color-primary-500);border-radius:var(--radius-xl);cursor:pointer;transition:all var(--duration-fast)var(--easing-standard);box-shadow:var(--shadow-sm);border:none}.submit-btn:hover:not(:disabled){background-color:var(--color-primary-600);box-shadow:var(--shadow-md);transform:translateY(-1px)}.submit-btn:active:not(:disabled){transform:translateY(0)}.submit-btn:disabled{background-color:var(--color-neutral-300);color:var(--color-neutral-500);cursor:not-allowed;box-shadow:none}.error-message{margin-top:var(--space-4);padding:var(--space-3)var(--space-4);font-size:var(--font-size-sm);color:var(--color-error);border-radius:var(--radius-sm);text-align:center;background-color:#ef44440d}