@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&display=swap";:root{--line-green: #06C755;--line-green-dark: #05a347;--line-green-light: #e8f8ef;--line-bg: #7494a5;--line-chat-bg: #7494a5;--white: #ffffff;--black: #111111;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--bubble-me: #06C755;--bubble-me-text: #ffffff;--bubble-other: #ffffff;--bubble-other-text: #111111;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);--font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 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var(--safe-area-bottom));right:16px;width:48px;height:48px;border-radius:50%;background:var(--line-green);color:var(--white);border:none;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);cursor:pointer;z-index:50;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.theme-options{display:flex;gap:12px;padding:0 16px}.theme-option{flex:1;padding:12px 16px;border:2px solid var(--gray-200);border-radius:12px;background:var(--white);font-size:14px;font-weight:500;color:var(--gray-700);cursor:pointer;text-align:center;transition:all .2s}.theme-option:hover{border-color:var(--gray-300)}.theme-option.active{border-color:var(--line-green);background:var(--line-green-light);color:var(--line-green)}.message-preview{background:var(--gray-50);padding:12px;border-radius:8px;font-size:14px;color:var(--gray-700);margin-bottom:16px;word-break:break-word}.action-buttons{display:flex;flex-direction:column;gap:12px}.action-btn{display:flex;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--gray-200);border-radius:12px;background:var(--white);color:var(--gray-900);font-size:15px;cursor:pointer;transition:all .2s}.action-btn:hover{background:var(--gray-50);border-color:var(--gray-300)}.action-btn svg{width:20px;height:20px;color:var(--gray-500)}.bookmark-section{margin-top:16px}.chat-header-actions{display:flex;align-items:center;gap:8px}.love-message{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:linear-gradient(135deg,#ff6b9d,#c44569);color:#fff;padding:20px 24px;border-radius:16px;text-align:center;font-size:16px;font-weight:600;box-shadow:var(--shadow-lg);z-index:1001;animation:lovePulse .6s ease-out}.love-heart{font-size:24px;margin-bottom:8px}@keyframes lovePulse{0%{transform:translate(-50%,-50%) scale(.8);opacity:0}50%{transform:translate(-50%,-50%) scale(1.1)}to{transform:translate(-50%,-50%) scale(1);opacity:1}}