:root{
  --navy:#0A1F44;
  --navy-2:#12295a;
  --blue:#1E6FEB;
  --blue-dark:#1559c7;
  --blue-soft:#e8f1fe;
  --bg:#f3f6fb;
  --card:#ffffff;
  --text:#16233b;
  --muted:#5b6b82;
  --border:#e2e8f2;
  --green:#15803D;
  --amber:#b45309;
  --red:#b91c1c;
  --gold:#92400e;
  --radius:12px;
  --shadow:0 1px 3px rgba(10,31,68,.08),0 4px 14px rgba(10,31,68,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.5;
  -webkit-text-size-adjust:100%;
}
.hidden{display:none!important}

/* ---------- login ---------- */
.login-wrap{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px}
.brand{display:flex;align-items:center;gap:14px;margin-bottom:26px}
.logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800}
.brand h1{margin:0;font-size:22px;color:var(--navy)}
.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}
.login-card{background:var(--card);border-radius:16px;box-shadow:var(--shadow);padding:26px;width:100%;max-width:400px}
.login-tabs{display:flex;background:var(--bg);border-radius:10px;padding:4px;margin-bottom:20px}
.login-tabs button{flex:1;border:0;background:transparent;padding:10px;border-radius:8px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer}
.login-tabs button.active{background:#fff;color:var(--navy);box-shadow:0 1px 3px rgba(0,0,0,.12)}

/* ---------- forms ---------- */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--navy)}
.field input,.field textarea,.field select{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:9px;font-size:15px;font-family:inherit;background:#fff;color:var(--text)}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.field textarea{resize:vertical;min-height:120px}
.field .hint{font-size:12px;color:var(--muted);margin-top:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:9px;padding:11px 18px;font-size:14px;font-weight:700;cursor:pointer;background:var(--blue);color:#fff;font-family:inherit}
.btn:hover{background:var(--blue-dark)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.block{width:100%}
.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--border)}
.btn.secondary:hover{background:var(--bg)}
.btn.danger{background:var(--red)}
.btn.danger:hover{background:#991b1b}
.btn.small{padding:7px 12px;font-size:13px;border-radius:7px}
.btn.ghost{background:transparent;color:var(--blue);padding:6px 10px}
.error{color:var(--red);font-size:13px;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:10px 12px;margin-top:12px}

/* ---------- app shell ---------- */
#topbar{background:var(--navy);color:#fff;padding:12px 20px;display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:50}
#topbar .logo{width:36px;height:36px;font-size:18px;border-radius:10px}
#topbar .title{font-weight:800;font-size:16px;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#topbar .who{font-size:12px;color:#b9c6e2;text-align:right;line-height:1.35;max-width:45%}
#tabs{background:#fff;border-bottom:1px solid var(--border);display:flex;gap:2px;overflow-x:auto;padding:0 12px;position:sticky;top:60px;z-index:40;-webkit-overflow-scrolling:touch}
#tabs button{border:0;background:none;padding:13px 14px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;white-space:nowrap;border-bottom:3px solid transparent;font-family:inherit}
#tabs button.active{color:var(--navy);border-bottom-color:var(--blue)}
#tabs .tab-badge{display:inline-block;min-width:20px;text-align:center;background:var(--red);color:#fff;font-size:11px;font-weight:700;border-radius:10px;padding:1px 6px;margin-left:6px}
#content{max-width:1100px;margin:0 auto;padding:20px 16px 80px}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.page-head h2{margin:0;font-size:20px;color:var(--navy)}

/* ---------- cards / grids ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.card h3{margin:0 0 6px;font-size:16px;color:var(--navy)}
.stat-card .num{font-size:32px;font-weight:800;color:var(--blue)}
.stat-card .lbl{font-size:13px;color:var(--muted)}
.athlete-card{cursor:pointer;transition:transform .08s ease}
.athlete-card:hover{transform:translateY(-2px)}
.athlete-card .meta{font-size:13px;color:var(--muted);margin-top:8px}
.pill{display:inline-block;font-size:12px;font-weight:700;border-radius:20px;padding:3px 10px;background:var(--blue-soft);color:var(--blue)}
.pill.unread{background:#fee2e2;color:var(--red)}
.pill.green{background:#dcfce7;color:var(--green)}
.pill.amber{background:#fef3c7;color:var(--amber)}

/* ---------- inbox ---------- */
.thread-list{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.thread-row{display:flex;gap:12px;align-items:center;padding:14px 16px;border-bottom:1px solid var(--border);cursor:pointer;width:100%;border-left:0;border-right:0;border-top:0;background:#fff;text-align:left;font-family:inherit;font-size:15px}
.thread-row:last-child{border-bottom:0}
.thread-row:hover{background:#f8fbff}
.thread-row .dot{width:10px;height:10px;border-radius:50%;background:transparent;flex-shrink:0}
.thread-row.unread .dot{background:var(--blue)}
.thread-row .info{flex:1;min-width:0}
.thread-row .coach{font-weight:700;color:var(--navy);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.thread-row.unread .coach{color:var(--blue)}
.thread-row .sub{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.thread-row .time{font-size:12px;color:var(--muted);flex-shrink:0}
.empty{background:var(--card);border-radius:var(--radius);padding:40px 20px;text-align:center;color:var(--muted);box-shadow:var(--shadow)}
.back-link{background:none;border:0;color:var(--blue);font-size:14px;font-weight:600;cursor:pointer;padding:0;margin-bottom:12px;font-family:inherit}

/* ---------- thread view ---------- */
.msg{margin-bottom:14px;max-width:820px}
.msg .msg-head{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-bottom:4px;flex-wrap:wrap}
.msg .msg-tag{font-weight:800;font-size:11px;letter-spacing:.06em}
.msg.sent .msg-tag{color:var(--blue)}
.msg.reply .msg-tag{color:var(--green)}
.email-frame{width:100%;height:320px;border:1px solid var(--border);border-radius:10px;background:#fff}
.reply-box{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-top:18px;position:sticky;bottom:12px}
.reply-box textarea{width:100%;min-height:110px;padding:12px;border:1px solid var(--border);border-radius:9px;font-size:15px;font-family:inherit;resize:vertical}
.reply-box textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.reply-actions{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}

/* ---------- board ---------- */
.board{display:flex;gap:12px;overflow-x:auto;padding-bottom:12px;-webkit-overflow-scrolling:touch}
.bcol{flex:0 0 270px;background:#eef2f9;border-radius:var(--radius);padding:10px;max-height:70vh;overflow-y:auto}
.bcol h4{margin:4px 6px 10px;font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--navy)}
.bcard{background:#fff;border-radius:9px;padding:12px;margin-bottom:10px;box-shadow:var(--shadow)}
.bcard .school{font-weight:700;font-size:14px;color:var(--navy)}
.bcard .coach{font-size:13px;color:var(--muted);margin:2px 0 8px}
.bcard select{width:100%;margin:6px 0;padding:8px;border:1px solid var(--border);border-radius:7px;font-size:13px;font-family:inherit}
.bcard textarea{width:100%;min-height:60px;font-size:13px;padding:8px;border:1px solid var(--border);border-radius:7px;font-family:inherit;resize:vertical;margin-top:6px}
.bcard .row{display:flex;gap:8px;margin-top:8px}
.add-panel{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid .full{grid-column:1/-1}

/* ---------- targets ---------- */
.target-card .trow{font-size:13px;margin:4px 0;color:var(--text)}
.target-card .trow b{color:var(--navy)}
.target-card .actions{display:flex;gap:8px;margin-top:12px}

/* ---------- course ---------- */
.section{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden}
.section-head{padding:16px 18px;font-weight:800;color:var(--navy);font-size:16px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;border:0;background:#fff;width:100%;font-family:inherit;text-align:left}
.lesson-row{display:flex;align-items:center;gap:12px;padding:12px 18px;border-top:1px solid var(--border);cursor:pointer}
.lesson-row:hover{background:#f8fbff}
.lesson-row input[type=checkbox]{width:20px;height:20px;accent-color:var(--blue);flex-shrink:0}
.lesson-row .lt{flex:1;font-size:14px;font-weight:600}
.lesson-row.done .lt{color:var(--muted);text-decoration:line-through}
.lesson-body{border-top:1px solid var(--border);padding:4px 0 0}

/* ---------- tables ---------- */
.tbl-wrap{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto;margin-bottom:16px}
table.tbl{width:100%;border-collapse:collapse;font-size:13px;min-width:560px}
table.tbl th{text-align:left;padding:10px 12px;background:var(--navy);color:#fff;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
table.tbl td{padding:10px 12px;border-top:1px solid var(--border);vertical-align:top}
table.tbl tr:first-child td{border-top:0}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px}

/* ---------- modal / toast / overlay ---------- */
.modal-back{position:fixed;inset:0;background:rgba(10,31,68,.55);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}
.modal{background:#fff;border-radius:16px;padding:26px;max-width:440px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal h3{margin:0 0 8px;color:var(--navy)}
.code-box{background:var(--navy);color:#fff;font-size:26px;font-weight:800;letter-spacing:.15em;text-align:center;border-radius:10px;padding:16px;margin:14px 0;font-family:ui-monospace,Menlo,Consolas,monospace}
#toast-root{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:8px;align-items:center;width:calc(100% - 32px);max-width:480px}
.toast{background:var(--navy);color:#fff;padding:12px 18px;border-radius:10px;font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.25);animation:tin .2s ease}
.toast.err{background:var(--red)}
@keyframes tin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
#overlay{position:fixed;inset:0;background:rgba(255,255,255,.7);z-index:250;display:flex;align-items:center;justify-content:center}
.spinner{width:44px;height:44px;border:4px solid var(--border);border-top-color:var(--blue);border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-note{text-align:center;color:var(--muted);padding:30px}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar select{padding:10px 12px;border:1px solid var(--border);border-radius:9px;font-size:14px;font-family:inherit;background:#fff}
.note{font-size:13px;color:var(--muted);background:var(--blue-soft);border-radius:9px;padding:10px 14px;margin-bottom:14px}

@media (max-width:700px){
  #content{padding:14px 12px 90px}
  .form-grid{grid-template-columns:1fr}
  #topbar .who{display:none}
  #tabs{top:60px}
  .page-head h2{font-size:18px}
  .reply-box{bottom:8px}
  .bcol{flex:0 0 240px}
}