:root{--sky:#0ea5e9;--navy:#0f172a;--muted:#64748b;--bg:#f8fafc;--card:#ffffff}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,Arial;background:linear-gradient(180deg,var(--bg),#eef2ff);color:var(--navy);-webkit-font-smoothing:antialiased}
.hidden{display:none}
.center-card{max-width:420px;margin:40px auto;padding:20px;display:flex;flex-direction:column;align-items:center;gap:8px}
.splash{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(180deg,#0369a1,#075985);color:white}
.logo-circle{width:96px;height:96px;border-radius:50%;background:var(--sky);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:44px;box-shadow:0 8px 30px rgba(2,6,23,0.3)}
.splash-title{margin-top:12px;font-size:28px;font-weight:700;opacity:0;transform:scale(.95);transition:all .5s ease}
.splash-sub{margin-top:6px;color:rgba(255,255,255,0.95);font-size:14px}
/* layout */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:white;border-bottom:1px solid #eef2ff;box-shadow:0 2px 6px rgba(2,6,23,0.03)}
.brand{display:flex;gap:12px;align-items:center}
.logo-small{width:36px;height:36px;border-radius:8px;background:var(--sky);padding:6px;color:white}
.small{font-size:12px}
.muted{color:var(--muted)}
.btn{padding:8px 10px;border-radius:8px;background:var(--sky);color:white;border:none;cursor:pointer}
.btn.ghost{background:transparent;color:var(--navy);border:1px solid #e6eef8}
.container{display:flex;gap:16px;max-width:1200px;margin:20px auto;padding:0 16px}
.sidebar{width:260px;background:rgba(14,165,233,0.03);padding:12px;border-radius:12px;height:calc(100vh - 120px);position:sticky;top:84px;overflow:auto}
.menu-btn{display:flex;align-items:center;gap:10px;padding:12px;border-radius:8px;border:none;background:transparent;width:100%;text-align:left;cursor:pointer;color:var(--navy);font-weight:700}
.menu-btn:hover{background:#bfeaff}
.menu-btn.active{background:linear-gradient(90deg,rgba(14,165,233,0.18),rgba(14,165,233,0.06));box-shadow:0 6px 20px rgba(14,165,233,0.06)}
.sidebar-footer{margin-top:18px;padding-top:8px;border-top:1px solid #e6eef8;font-size:12px;display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.logo-mini{width:36px;height:36px;border-radius:50%;background:var(--sky);display:flex;align-items:center;justify-content:center;color:white;font-weight:700}

/* main */
.main-content{flex:1;min-height:70vh;padding-bottom:40px;padding-top:20px}
.card{background:var(--card);padding:20px;border-radius:12px;box-shadow:0 8px 24px rgba(15,23,42,0.04);margin-bottom:16px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:16px}
.stat{background:linear-gradient(180deg,white,#f8fbff);padding:18px;border-radius:12px;display:flex;justify-content:space-between;align-items:center;transition:transform .18s ease}
.stat:hover{transform:translateY(-6px)}
.stat .label{color:var(--muted);font-size:13px}
.stat .num{font-weight:800;font-size:22px;color:var(--navy)}

/* form spacious layout */
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.form-row label{font-weight:700;color:var(--muted);font-size:13px}
.form-row input, .form-row select, .form-row textarea{padding:12px;border-radius:8px;border:1px solid #e6eef8;font-size:14px}
.form-actions{display:flex;gap:10px;margin-top:8px}
.btn-secondary{background:white;border:1px solid #e6eef8;color:var(--navy);padding:10px 12px;border-radius:8px;cursor:pointer}
.search-row{display:flex;gap:8px;align-items:center;margin-bottom:12px}
.table-wrap{max-height:420px;overflow:auto;border-radius:8px;border:1px solid #f1f5f9}

/* table responsive */
table{width:100%;border-collapse:collapse}
th,td{padding:12px;border-bottom:1px solid #f1f5f9;text-align:left;font-size:14px}
tr:nth-child(even){background:#fbfdff}

/* full-screen entry (content area) */
.fullscreen{width:100%;min-height:70vh;padding:12px}

/* responsive */
@media(max-width:900px){.container{flex-direction:column}.sidebar{width:100%;height:auto;position:relative;top:0}}