:root{--bg: #0f172a;--sidebar: #1e293b;--card: #1e293b;--text: #f8fafc;--sub: #94a3b8;--accent: #6366f1;--border: rgba(255, 255, 255, .05);--success: #10b981}.light{--bg: #f8fafc;--sidebar: #ffffff;--card: #ffffff;--text: #0f172a;--sub: #64748b;--accent: #4f46e5;--border: rgba(0, 0, 0, .05);--success: #059669}*{box-sizing:border-box;transition:all .3s ease}.app-container{display:flex;min-height:100vh;background:var(--bg);color:var(--text);font-family:PingFang SC,system-ui,sans-serif}.sidebar{width:240px;background:var(--sidebar);border-right:1px solid var(--border);padding:32px 20px;display:flex;flex-direction:column;position:fixed;height:100vh;z-index:10}.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:1.2rem;margin-bottom:48px}.logo-box{width:36px;height:36px;background:var(--accent);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff}.nav-links{display:flex;flex-direction:column;gap:8px}.nav-links button{display:flex;align-items:center;gap:12px;padding:12px 16px;border:none;background:transparent;color:var(--sub);border-radius:12px;cursor:pointer;font-weight:600;text-align:left}.nav-links button.active{background:var(--accent);color:#fff;box-shadow:0 4px 12px #6366f14d}.cloud-status{margin-top:auto;font-size:.75rem;color:var(--success);display:flex;align-items:center;gap:6px;padding:12px;background:#10b9811a;border-radius:8px}.main-content{flex:1;margin-left:240px;padding:40px 60px;max-width:1200px}.view-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:40px}.search-box{background:var(--card);padding:12px 20px;border-radius:14px;display:flex;align-items:center;gap:12px;width:320px;border:1px solid var(--border)}.search-box input{background:transparent;border:none;color:var(--text);outline:none;width:100%}.add-btn{background:var(--accent);color:#fff;border:none;padding:12px 24px;border-radius:14px;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:8px}.checkin-view{max-width:800px;margin:0 auto}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:32px}.stat-card{background:var(--card);padding:32px;border-radius:24px;border:1px solid var(--border);text-align:center}.stat-val{font-size:3rem;font-weight:900;margin:12px 0;color:var(--text)}.stat-label{color:var(--sub);font-weight:600}.calendar-card{background:var(--card);padding:40px;border-radius:24px;border:1px solid var(--border)}.calendar-header{margin-bottom:32px}.calendar-header h3{margin:0;font-size:1.5rem}.calendar-header p{color:var(--sub);margin:8px 0 0}.checkin-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:12px;margin-bottom:40px}.checkin-dot{aspect-ratio:1;background:var(--bg);border-radius:12px;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;color:transparent}.checkin-dot.active{background:var(--accent);border-color:var(--accent);color:#fff}.checkin-dot.today{border-color:var(--accent);border-style:dashed}.big-checkin-btn{width:100%;padding:20px;border-radius:16px;border:none;background:var(--accent);color:#fff;font-size:1.1rem;font-weight:800;cursor:pointer}.big-checkin-btn.done{background:var(--success);cursor:default}.diary-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.diary-card{background:var(--card);border-radius:20px;overflow:hidden;border:1px solid var(--border);cursor:pointer}.card-img{height:160px;overflow:hidden}.card-img img{width:100%;height:100%;object-fit:cover}.card-info{padding:20px}.card-date{font-size:.75rem;color:var(--sub)}.card-info h3{margin:8px 0;font-size:1.1rem}.card-footer{display:flex;align-items:flex-start;gap:10px}.card-footer p{font-size:.85rem;color:var(--sub);margin:0;line-height:1.5}.editor-body,.detail-paper{max-width:800px;margin:0 auto;background:var(--card);padding:40px;border-radius:24px;border:1px solid var(--border)}.mood-selector{display:flex;gap:10px;margin-bottom:32px;overflow-x:auto}.mood-btn{flex-shrink:0;padding:8px 16px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer}.mood-btn.active{border-color:var(--accent);background:#6366f11a}.title-input{width:100%;font-size:2rem;font-weight:800;background:transparent;border:none;color:var(--text);margin-bottom:24px;outline:none}.content-input{width:100%;min-height:300px;background:transparent;border:none;color:var(--text);resize:none;outline:none;line-height:1.8}.detail-cover{width:100%;height:300px;object-fit:cover;border-radius:16px;margin-bottom:24px}.ai-reply-box{margin-top:40px;padding:24px;background:#6366f10d;border-radius:16px;border-left:4px solid var(--accent)}.ai-reply-title{font-weight:800;font-size:.8rem;color:var(--accent);margin-bottom:12px;display:flex;align-items:center;gap:8px}.loading-screen{height:100vh;display:flex;align-items:center;justify-content:center;background:#0f172a;color:#fff;font-size:1.2rem}.back-btn{background:transparent;border:none;color:var(--sub);cursor:pointer;display:flex;align-items:center;gap:4px;margin-bottom:20px;font-weight:600}.save-btn:disabled{opacity:.6;cursor:not-allowed}.settings-view{max-width:600px}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:20px;background:var(--card);border-radius:16px;margin-bottom:16px}.toggle{width:50px;height:26px;background:#475569;border-radius:13px;position:relative;cursor:pointer}.toggle.on{background:var(--accent)}.toggle-handle{width:20px;height:20px;background:#fff;border-radius:50%;position:absolute;top:3px;left:3px}.toggle.on .toggle-handle{left:27px}