:root{--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text-main: #0f172a;--color-text-muted: #64748b;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success-bg: #ecfdf5;--color-success-text: #047857;--color-warning-bg: #fffbeb;--color-warning-text: #b45309;--color-neutral-bg: #f1f5f9;--color-neutral-text: #475569;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text-main);line-height:1.5;padding:24px 16px}.container{max-width:900px;margin:0 auto}.header{margin-bottom:24px}.header h1{font-size:1.6rem;font-weight:700;color:var(--color-text-main)}.header p{color:var(--color-text-muted);font-size:.95rem}.status-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:24px;font-size:.9rem}.status-dot{width:10px;height:10px;border-radius:50%;background-color:#10b981}.status-dot.error{background-color:#ef4444}.card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;margin-bottom:24px;box-shadow:var(--shadow-sm)}.card-title{font-size:1.15rem;font-weight:600;margin-bottom:16px}.form-group{margin-bottom:14px}.form-group label{display:block;font-size:.875rem;font-weight:500;margin-bottom:6px;color:var(--color-text-main)}.form-input{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:.95rem;font-family:inherit;transition:border-color .15s ease}.form-input:focus{outline:none;border-color:var(--color-primary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;font-size:.95rem;font-weight:500;border:none;border-radius:var(--radius-sm);cursor:pointer;background-color:var(--color-primary);color:#fff;transition:background-color .15s ease}.btn:hover{background-color:var(--color-primary-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.table-wrapper{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--color-border)}th{background-color:var(--color-neutral-bg);font-weight:600;color:var(--color-text-muted)}.badge{display:inline-block;padding:3px 8px;font-size:.75rem;font-weight:600;border-radius:var(--radius-sm);text-transform:uppercase;letter-spacing:.03em}.badge-available{background-color:var(--color-success-bg);color:var(--color-success-text)}.badge-borrowed{background-color:var(--color-warning-bg);color:var(--color-warning-text)}.empty-state{text-align:center;padding:32px 16px;color:var(--color-text-muted);font-size:.95rem}