:root{--slate-50: #fcfcfc;--slate-100: #f5f5f7;--slate-200: #e5e5ea;--slate-300: #d1d1d6;--slate-400: #aeb0b8;--slate-500: #8e8e93;--slate-600: #636366;--slate-700: #48484a;--slate-800: #2c2c2e;--slate-900: #1c1c1e;--primary-50: #f0f4ff;--primary-100: #e0e7ff;--primary-500: #2c3e50;--primary-600: #1a252f;--primary-700: #0f171e;--bg-app: #fbfbfd;--bg-surface: #ffffff;--bg-sidebar: #f5f5f7;--text-main: #1d1d1f;--text-muted: #86868b;--text-on-primary: #ffffff;--border-subtle: #f2f2f2;--border-base: #e5e5e5;--border-focus: #0071e3;--accent: #1d1d1f;--accent-hover: #000000;--accent-primary: #0071e3;--success: #28cd41;--warning: #ff9f0a;--danger: #ff3b30;--shadow-sm: 0 2px 4px rgba(0,0,0,.02);--shadow-md: 0 4px 12px rgba(0,0,0,.05);--shadow-lg: 0 8px 24px rgba(0,0,0,.08);--shadow-xl: 0 12px 32px rgba(0,0,0,.1);--sidebar-width: 240px;--header-height: 52px;--container-max-width: 1000px;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-app);color:var(--text-main);-webkit-font-smoothing:antialiased;line-height:1.5;letter-spacing:-.01em}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;letter-spacing:-.02em;color:#1d1d1f}p{margin:0}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:none;font:inherit;display:inline-flex;align-items:center;justify-content:center;transition:var(--transition-fast)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border-base);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;padding:32px 20px}.main-content{flex:1;display:flex;flex-direction:column;min-width:0}.header{height:var(--header-height);padding:0 40px;display:flex;align-items:center;justify-content:space-between;background-color:#fffc;-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--border-base);position:sticky;top:0;z-index:10}.content-area{padding:40px;max-width:var(--container-max-width);margin:0 auto;width:100%}.brand{display:flex;align-items:center;gap:12px;margin-bottom:40px}.brand-logo{width:24px;height:24px;background-color:var(--primary-500);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px}.brand-text{font-size:16px;font-weight:600;color:#1d1d1f;letter-spacing:-.03em}.nav-menu{display:flex;flex-direction:column;gap:4px}.nav-link{padding:10px 14px;border-radius:var(--radius-sm);color:#424245;font-weight:500;font-size:14px;transition:var(--transition-fast);display:flex;align-items:center;gap:12px}.nav-link:hover{background-color:#0000000a;color:#1d1d1f}.nav-link.active{background-color:#fff;color:#1d1d1f;box-shadow:var(--shadow-sm)}.nav-link svg{width:18px;height:18px;opacity:.8}.btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;border-radius:var(--radius-sm);font-weight:500;font-size:14px;white-space:nowrap}.btn-primary{background-color:var(--primary-500);color:#fff}.btn-primary:hover{background-color:var(--primary-600)}.btn-primary:disabled{background-color:var(--slate-300);cursor:not-allowed}.btn-secondary{background-color:#fff;border:1px solid var(--border-base);color:#1d1d1f}.btn-secondary:hover{background-color:var(--slate-100)}.btn-outline{border:1px solid var(--border-base);color:#424245}.btn-danger{color:var(--danger)}.btn-danger:hover{background-color:#fff1f0}.btn-ghost{color:#86868b}.btn-ghost:hover{background-color:#0000000a;color:#1d1d1f}.card{background-color:var(--bg-surface);border-radius:var(--radius-md);border:1px solid var(--border-base);overflow:hidden}.card-header{padding:18px 24px;border-bottom:1px solid var(--border-subtle);display:flex;justify-content:space-between;align-items:center}.card-body{padding:24px}.card-footer{padding:20px 24px;background-color:var(--slate-100);border-top:1px solid var(--border-base)}.form-group{margin-bottom:24px}.form-label{display:block;font-size:12px;font-weight:600;margin-bottom:8px;color:#86868b;text-transform:uppercase;letter-spacing:.05em}.input{width:100%;padding:12px 16px;border-radius:var(--radius-sm);border:1px solid var(--border-base);background-color:#fff;transition:var(--transition-fast);font-size:14px;color:#1d1d1f}.input:focus{outline:none;border-color:#0071e3;box-shadow:0 0 0 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var(--border-base);border-radius:var(--radius-md);background-color:#fff;transition:var(--transition-fast)}.text-card:hover{box-shadow:var(--shadow-md)}.text-card-meta{display:flex;justify-content:space-between;margin-bottom:16px;font-size:12px;color:#86868b}.text-card-content{font-size:15px;line-height:1.6;white-space:pre-wrap;color:#1d1d1f}.file-item{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border:1px solid var(--border-base);border-radius:var(--radius-md);background-color:#fff;transition:var(--transition-fast)}.file-item:hover{box-shadow:var(--shadow-md)}.file-info{display:flex;align-items:center;gap:16px}.file-icon{width:40px;height:40px;background-color:#f5f5f7;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#86868b}.file-name{font-size:14px;font-weight:600;color:#1d1d1f}.file-size{font-size:12px;color:#86868b}.account-menu-trigger{display:flex;align-items:center;gap:10px;padding:6px 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