:root{--bg: #ffffff;--bg-2: #f7f7f8;--bg-3: #ececef;--text: #1a1a1a;--text-2: #6e6e80;--text-3: #9b9b9b;--border: #e5e5e7;--border-strong: #d4d4d8;--accent: #5b5bd6;--accent-hover: #4c4cc4;--accent-soft: rgba(91, 91, 214, .1);--success: #1f8a5b;--warn: #c79100;--danger: #d4373b;--bubble-self: #f1f1f4;--bubble-self-text: #1a1a1a;--bubble-other: #ececef;--bubble-other-text: #1a1a1a;--shadow-sm: 0 1px 2px rgba(15, 15, 25, .04);--shadow-md: 0 4px 16px rgba(15, 15, 25, .06), 0 1px 2px rgba(15, 15, 25, .04);--shadow-lg: 0 10px 40px rgba(15, 15, 25, .12), 0 2px 6px rgba(15, 15, 25, .06);--radius-btn: 8px;--radius-card: 12px;--radius-bubble: 18px;--radius-input: 24px}.dark{--bg: #1a1a1c;--bg-2: #232326;--bg-3: #2c2c30;--text: #ececec;--text-2: #b4b4b4;--text-3: #7c7c80;--border: #2e2e32;--border-strong: #3a3a3e;--accent: #7a7aff;--accent-hover: #8d8dff;--accent-soft: rgba(122, 122, 255, .15);--bubble-self: #2c2c30;--bubble-self-text: #ececec;--bubble-other: #323236;--bubble-other-text: 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