:root{
  --bg:#f4f5f7; --card:#ffffff; --border:#e5e7eb; --text:#111827; --muted:#6b7280;
  --primary:#4f46e5; --primary-dark:#4338ca; --danger:#dc2626; --warn:#d97706; --ok:#059669;
  --overdue:#dc2626; --today:#d97706; --soon:#2563eb; --upcoming:#6b7280;
  --radius:10px; --shadow:0 1px 3px rgba(0,0,0,0.08);
}
*{box-sizing:border-box;}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);}
.hidden{display:none !important;}
button{cursor:pointer;font-family:inherit;}
input,select,textarea{font-family:inherit;}

/* ---- Login ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;}
.login-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:36px;width:100%;max-width:380px;}
.login-card h1{margin:0 0 4px;font-size:22px;}
.login-card p.sub{margin:0 0 24px;color:var(--muted);font-size:14px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:#fff;color:var(--text);}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,0.12);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:8px;border:none;font-size:14px;font-weight:600;}
.btn-primary{background:var(--primary);color:#fff;width:100%;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-secondary{background:#f3f4f6;color:var(--text);}
.btn-danger{background:#fee2e2;color:var(--danger);}
.btn-ghost{background:transparent;color:var(--muted);}
.error-msg{background:#fee2e2;color:#b91c1c;padding:10px 12px;border-radius:8px;font-size:13px;margin-bottom:16px;}

/* ---- App shell ---- */
.app-bar{background:var(--card);border-bottom:1px solid var(--border);padding:14px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:5;}
.app-bar .brand{font-weight:700;font-size:18px;color:var(--primary);}
.app-bar .right{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--muted);}
.container{max-width:980px;margin:0 auto;padding:24px;}

.summary-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin-bottom:28px;}
.summary-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;text-align:center;}
.summary-card .num{font-size:28px;font-weight:700;}
.summary-card .lbl{font-size:13px;color:var(--muted);margin-top:4px;}
.summary-card.overdue .num{color:var(--overdue);}
.summary-card.today .num{color:var(--today);}
.summary-card.soon .num{color:var(--soon);}
.summary-card.upcoming .num{color:var(--upcoming);}

.section-title{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:700;margin:28px 0 12px;}
.section-title .dot{width:10px;height:10px;border-radius:50%;}
.dot.overdue{background:var(--overdue);} .dot.today{background:var(--today);} .dot.soon{background:var(--soon);} .dot.upcoming{background:var(--upcoming);} .dot.event{background:#7c3aed;} .dot.reminder{background:#0891b2;}

.item-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;margin-bottom:10px;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.item-main{min-width:0;}
.item-title{font-weight:600;font-size:15px;}
.item-sub{font-size:13px;color:var(--muted);margin-top:2px;}
.badge{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;margin-left:8px;}
.badge.overdue{background:#fee2e2;color:var(--overdue);}
.badge.today{background:#fef3c7;color:var(--today);}
.badge.soon{background:#dbeafe;color:var(--soon);}
.badge.upcoming{background:#f3f4f6;color:var(--upcoming);}
.item-actions{display:flex;gap:8px;flex-shrink:0;}
.icon-btn{width:34px;height:34px;border-radius:8px;border:1px solid var(--border);background:#fff;display:flex;align-items:center;justify-content:center;color:var(--muted);}
.icon-btn:hover{background:#f9fafb;color:var(--text);}
.empty-msg{color:var(--muted);font-size:14px;padding:20px;text-align:center;background:var(--card);border-radius:var(--radius);}

.fab{position:fixed;bottom:28px;right:28px;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;font-size:28px;border:none;box-shadow:0 4px 14px rgba(79,70,229,0.4);display:flex;align-items:center;justify-content:center;}
.fab:hover{background:var(--primary-dark);}

/* ---- Modal ---- */
.modal-backdrop{position:fixed;inset:0;background:rgba(17,24,39,0.45);display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;}
.modal{background:var(--card);border-radius:var(--radius);width:100%;max-width:480px;max-height:90vh;overflow-y:auto;padding:24px;}
.modal h2{margin:0 0 16px;font-size:18px;}
.tabs{display:flex;gap:6px;margin-bottom:18px;background:#f3f4f6;padding:4px;border-radius:8px;}
.tab{flex:1;text-align:center;padding:8px;border-radius:6px;font-size:13px;font-weight:600;color:var(--muted);border:none;background:transparent;}
.tab.active{background:#fff;color:var(--primary);box-shadow:var(--shadow);}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px;}
.history-list{margin-top:6px;font-size:13px;color:var(--muted);max-height:140px;overflow-y:auto;border:1px solid var(--border);border-radius:8px;padding:8px 12px;}
.history-list div{padding:4px 0;border-bottom:1px solid var(--border);}
.history-list div:last-child{border-bottom:none;}