:root {
  --ink: #19352e;
  --muted: #667871;
  --paper: #f4f7f3;
  --card: #fff;
  --line: #dbe5df;
  --green: #24735c;
  --green-soft: #e8f4ef;
  --orange: #bd671f;
  --red: #b34545;
  --shadow: 0 12px 35px rgba(27, 62, 51, .11);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
}
button, input, select, textarea { font: inherit; }
a { color: inherit; }
.portal-shell { width: min(1180px, 100%); margin: 0 auto; padding: 20px; }
.portal-head {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  margin-bottom: 18px;
}
.portal-head h1 { font-size: clamp(24px, 4vw, 34px); margin: 0; }
.portal-head p { color: var(--muted); margin: 4px 0 0; }
.brand-mark { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: var(--green); color: #fff; font-weight: 900; }
.head-title { display: flex; align-items: center; gap: 12px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 20px; box-shadow: var(--shadow);
}
.hidden { display: none !important; }
.stack { display: grid; gap: 14px; }
.grid { display: grid; gap: 14px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field { display: grid; gap: 6px; }
.field label { color: var(--muted); font-size: 14px; font-weight: 700; }
.field input, .field select, .field textarea, .control {
  width: 100%; min-height: 46px; border: 1px solid #cbd8d1; border-radius: 11px;
  padding: 9px 12px; background: #fff; color: var(--ink);
}
.btn {
  min-height: 44px; border: 1px solid var(--line); border-radius: 12px; padding: 9px 15px;
  background: #fff; color: var(--ink); text-decoration: none; cursor: pointer; font-weight: 800;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
}
.btn.primary { background: var(--green); color: #fff; border-color: var(--green); }
.btn.soft { background: var(--green-soft); color: var(--green); border-color: #cce6db; }
.btn.danger { color: var(--red); border-color: #e9c4c4; }
.danger-text { color: var(--red); }
.btn:disabled { opacity: .65; cursor: wait; }
.btn.is-loading::before {
  content: ""; width: 15px; height: 15px; border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 50%; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.bind-box { max-width: 540px; margin: 7vh auto 0; }
.bind-result { display: grid; gap: 12px; margin-top: 16px; padding: 16px; border-radius: 14px; background: #fff9e9; border: 1px solid #f0d797; }
.bind-result code { display: block; padding: 12px; border-radius: 9px; background: #24332e; color: #fff; user-select: all; }
.tabs { display: flex; gap: 8px; overflow-x: auto; margin: 0 0 16px; }
.student-bottom-tabs{position:fixed;z-index:20;left:0;right:0;bottom:0;margin:0;padding:8px max(8px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;background:rgba(255,255,255,.97);border-top:1px solid var(--line);box-shadow:0 -3px 14px rgba(27,62,51,.10)}
.student-bottom-tabs .btn{min-width:0;padding:7px 4px;text-align:center}.student-bottom-tabs+.tab-panel{margin-bottom:72px}
.tabs button { white-space: nowrap; }
.tabs button.active { background: var(--ink); color: #fff; }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.summary { background: #fff; border: 1px solid var(--line); border-radius: 15px; padding: 14px; }
.summary span { display: block; color: var(--muted); font-size: 13px; }
.summary strong { display: block; margin-top: 3px; font-size: 23px; }
.section-title { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 0 0 12px; }
.section-title h2, .section-title h3 { margin: 0; }
.muted { color: var(--muted); }
.list { display: grid; gap: 9px; }
.list-row {
  display: grid; grid-template-columns: minmax(120px, 1.1fr) repeat(3, minmax(90px, 1fr)) auto;
  gap: 12px; align-items: center; padding: 13px; border: 1px solid var(--line); border-radius: 13px;
}
.period-card,.contact-book-post { padding: 13px; border: 1px solid var(--line); border-radius: 13px; background:#fff; }
.period-card-head { display:grid; gap:9px; margin-bottom:10px; }
.period-card-title > strong,.period-card-title > small { display:block; }
.student-teacher-contact { margin-bottom:10px; }.student-contact-row{display:grid;grid-template-columns:auto 1fr;gap:5px 12px;align-items:center}.student-contact-row span{color:var(--muted);font-size:12px}.student-contact-row strong{font-size:15px}
.period-payment{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;width:100%;box-sizing:border-box;padding:10px 12px;border:1px solid #d9e4df;border-radius:11px;background:#f8fbf9}
.period-payment.paid{border-color:#b7dace;background:var(--green-soft)}.period-payment.unpaid{border-color:#e7c3cb;background:#fff5f7}
.period-payment-amount{display:grid;gap:2px;color:var(--ink)}.period-payment-amount span{color:var(--muted);font-size:12px;font-weight:800}.period-payment-amount strong{font-size:20px;line-height:1.15}
.period-payment-state{display:grid;gap:5px;justify-items:end;text-align:right}.period-payment-state small{font-size:11px;color:var(--green)}.period-payment-state .badge{justify-self:end}.period-payment-state .btn{min-width:92px}
.lesson-slot-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(105px,1fr)); gap:7px; }
.lesson-slot { min-height:72px; padding:9px; border:1px dashed #cbd8d2; border-radius:10px; background:#fafcfb; color:var(--muted); display:grid; gap:3px; }
.lesson-slot.used { border-style:solid; border-color:#b7dace; background:var(--green-soft); color:var(--ink); }
.lesson-slot.payment-due{border-color:#e1adba;background:#fff0f3;color:#9c3148}.lesson-slot.payment-due small{font-weight:900}
.lesson-slot strong { font-size:12px; }.lesson-slot span,.lesson-slot small { font-size:11px; }
.period-restored-note{display:inline-flex;margin-top:5px;padding:4px 7px;border-radius:999px;background:#eef7f3;color:var(--green);font-size:11px;font-weight:800}
.upcoming-course-list{display:grid;gap:6px;margin-bottom:12px}.upcoming-course-title{font-size:13px;font-weight:900;color:var(--green)}.upcoming-course-row{display:grid;gap:2px;padding:9px 10px;border:1px solid var(--line);border-radius:10px;background:#f8fbf9}.upcoming-course-row strong{font-size:12px}.upcoming-course-row span{font-size:11px;color:var(--muted)}
.contact-book-post { display:grid; gap:6px; }.contact-book-post p { margin:0; white-space:normal; }
.contact-book-images { display:flex; flex-wrap:wrap; gap:7px; }.contact-image-button { border:1px solid #cce6db; background:var(--green-soft); color:var(--green); border-radius:8px; padding:6px 9px; cursor:pointer; }
.contact-book-image { display:block; max-width:100%; max-height:420px; border-radius:10px; border:1px solid var(--line); }
.badge { display: inline-flex; width: max-content; padding: 3px 9px; border-radius: 999px; background: var(--green-soft); color: var(--green); font-size: 13px; font-weight: 800; }
.badge.warn { background: #fff0e4; color: var(--orange); }
.badge.danger { background: #fbeaea; color: var(--red); }
.week-scroll { overflow: auto; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.week-grid {
  min-width: 840px; display: grid; grid-template-columns: 58px repeat(7, 1fr); grid-template-rows: 44px; grid-auto-rows: 42px;
}
.week-grid.mobile-day { min-width: 0; grid-template-columns: 58px minmax(220px, 1fr); }
.week-cell { position: relative; z-index: 0; min-height: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 2px; }
.week-cell.head { position: sticky; top: 0; z-index: 2; min-height: 0; padding: 4px; background: #f0f5f2; text-align: center; font-size: 12px; font-weight: 800; }
.week-cell.time { position: sticky; left: 0; z-index: 1; padding: 5px 3px; background: #f8faf8; font-size: 10px; font-weight: 800; text-align: center; }
.lesson-placement {
  position: relative; z-index: 1; min-width: 0; margin: 2px; align-self: stretch;
}
.lesson-placement > .lesson { height: 100%; box-shadow: 0 1px 4px rgba(18,53,45,.15); }
.lesson-overlap-placement { padding: 2px; border: 1px solid #e5a49b; border-radius: 7px; background: #fff1ee; overflow: hidden; }
.lesson {
  width: 100%; min-width: 0; margin: 0; padding: 4px 5px; border: 0; border-radius: 7px; background: var(--green); color: #fff;
  font-size: 10px; line-height: 1.15; text-align: left; cursor: pointer;
}
.lesson > span, .lesson > strong, .lesson > small { display: block; overflow: hidden; text-overflow: ellipsis; }
.lesson > strong { margin: 1px 0; font-size: 12px; white-space: nowrap; }
.lesson > small { font-size: 9px; white-space: nowrap; opacity: .9; }
.lesson-time { white-space: nowrap; }
.lesson-time em { display: inline-block; margin-left: 3px; padding: 0 4px; border-radius: 999px; background: rgba(255,255,255,.22); color: #fff; font-size: 8px; font-style: normal; }
.lesson.busy { background: #96a49e; }
.lesson.gift { background: #8a54a4; }
.lesson.leave { background: #91a09a; opacity: .72; }
.lesson.absent { background: #9f4b43; }
.lesson.group-lesson { background: #496ca0; }
.lesson.conflict-lesson { background: #a94d3f; min-width: 124px; }
.lesson-cluster { display: grid; gap: 4px; }
.lesson-cluster.conflict { display: flex; height: calc(100% - 21px); gap: 5px; overflow-x: auto; }
.lesson-cluster.conflict .lesson { flex: 1 0 124px; }
.overlap-note { margin-bottom: 3px; color: #a53f33; font-size: 12px; font-weight: 900; }
.empty-slot { display: block; width: 100%; height: 100%; min-height: 0; border: 1px dashed #d4e2dc; border-radius: 6px; background: #f9fbfa; color: #7c9088; cursor: pointer; font-size: 9px; font-weight: 700; }
.empty-slot:hover { background: var(--green-soft); color: var(--green); }
.closed-slot { display: grid; height: 100%; min-height: 0; place-items: center; color: #a2aaa6; background: #f3f4f3; border-radius: 6px; font-size: 9px; }
.mobile-day-tabs { display: none; gap: 8px; overflow-x: auto; margin: 0 0 10px; padding-bottom: 3px; }
.mobile-day-tabs .btn { white-space: nowrap; min-height: 40px; padding: 7px 11px; }
.mobile-day-tabs .btn.active { background: var(--ink); color: #fff; }
.date-strip { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 10px; }
.date-chip { min-width: 76px; display: grid; gap: 1px; text-align: center; }
.date-chip small { font-weight: 500; }
.date-chip.active { background: var(--ink); color: #fff; }
.rental-board { display: grid; gap: 6px; }
.rental-slot {
  width: 100%; display: grid; grid-template-columns: 76px 90px 1fr; gap: 10px; align-items: center;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; background: #fff; text-align: left; cursor: pointer;
}
.rental-slot:hover, .rental-slot.selected { border-color: var(--green); background: var(--green-soft); }
.rental-slot.unavailable { color: #98a39e; background: #f2f4f3; cursor: default; }
.rental-slot-time { font-weight: 900; }
.rental-slot-count { color: var(--green); font-weight: 900; }
.rental-slot.unavailable .rental-slot-count { color: inherit; }
.rental-slot-rooms { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 14px; }
.rental-choice-panel { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 16px; }
.rental-use-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:12px}.rental-use{min-height:46px;padding:8px 10px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);font-weight:900}.rental-use:hover,.rental-use.active{border-color:var(--green);background:var(--green-soft);color:var(--green)}.rental-quick-fields{margin-bottom:15px}.rental-week-title{margin-top:8px}.date-chip em{display:block;margin-top:2px;color:var(--muted);font-size:10px;font-style:normal}.date-chip.active em{color:inherit}.rental-match-heading{margin:12px 0 7px;color:var(--green-dark);font-size:15px}
.role-question { text-align: center; max-width: 620px; }
.role-question h2 { font-size: clamp(25px, 6vw, 38px); margin: 5px 0 18px; }
.role-buttons { display: grid; gap: 12px; }
.portal-toast {
  position: fixed; right: 18px; bottom: 18px; z-index: 99; max-width: min(430px, calc(100vw - 36px));
  padding: 13px 16px; border-radius: 12px; background: var(--ink); color: #fff;
  box-shadow: var(--shadow); transform: translateY(30px); opacity: 0; pointer-events: none; transition: .2s;
}
.portal-toast.show { transform: translateY(0); opacity: 1; }
.portal-toast.error { background: var(--red); }
.toolbar { display: flex; flex-wrap: wrap; align-items: end; gap: 10px; margin-bottom: 14px; }
.toolbar .field { min-width: 150px; }
.notice { padding: 12px 14px; border-radius: 12px; background: #fff9e9; border: 1px solid #f0d797; }
.modal {
  position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 20px;
  background: rgba(18, 37, 31, .5);
}
.modal-panel { width: min(620px, 100%); max-height: 90vh; overflow: auto; }
.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.payroll-day { display: grid; gap: 7px; padding-top: 10px; border-top: 2px solid var(--line); }
.payroll-day:first-child { padding-top: 0; border-top: 0; }
.payroll-day h3 { margin: 0; color: var(--green); font-size: 15px; }
.rental-history-row > :last-child { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: 6px; }
.teacher-lesson-state-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; padding-top: 8px; border-top: 1px solid var(--line); }
.quick-availability{padding:12px;border:1px solid var(--line);border-radius:13px;background:#f8fbf9}.quick-availability .section-title{margin-bottom:9px}.availability-suggestions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;max-height:310px;overflow:auto}.availability-option{min-width:0;padding:9px 10px;border:1px solid #bfd6cc;border-radius:10px;background:#fff;text-align:left;color:var(--ink)}.availability-option:hover,.availability-option.selected{border-color:var(--green);background:var(--green-soft);box-shadow:inset 0 0 0 2px rgba(36,115,92,.12)}.availability-option strong,.availability-option span{display:block}.availability-option span{margin-top:2px;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.portal-session-card{max-width:540px;margin:7vh auto 0;display:flex;align-items:center;gap:14px}
.portal-session-card p{margin:3px 0 0;color:var(--muted)}
.portal-session-spinner{width:28px;height:28px;flex:0 0 auto;border:3px solid #cce6db;border-right-color:var(--green);border-radius:50%;animation:spin .7s linear infinite}
.auth-title{margin-bottom:14px}
.auth-choice-list{display:grid;gap:12px}
.auth-choice{display:grid;gap:12px;padding:16px;border:1px solid var(--line);border-radius:15px;background:#fff}
.auth-choice-line{border-color:#94d3b9;background:linear-gradient(180deg,#f2fbf6,#fff)}
.auth-choice-regular{background:#fbfcfb}
.auth-choice-heading{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:11px}
.auth-choice-heading h3{margin:0;font-size:17px}
.auth-choice-heading p{margin:3px 0 0;color:var(--muted);font-size:13px;line-height:1.55}
.auth-choice>small,.auth-security-note{color:var(--muted);font-size:12px;line-height:1.55}
.auth-choice-icon{display:grid;place-items:center;width:45px;height:45px;border-radius:13px;background:#06c755;color:#fff;font-size:11px;font-weight:900}
.auth-choice-icon-plain{background:#eef3f0;color:var(--green)}
.auth-recommended{align-self:start;padding:4px 8px;border-radius:999px;background:#dff5e9;color:#176548;font-size:11px;font-weight:900}
.auth-line-button,.auth-regular-submit{width:100%;min-height:48px;font-size:15px}
.auth-regular-form{margin-top:2px}
.auth-line-setup{padding:16px;border:1px solid #b8ddcd;border-radius:15px;background:var(--green-soft)}
.auth-divider{display:flex;align-items:center;gap:12px;color:var(--ink);font-size:20px;font-weight:900;justify-content:center}
.auth-divider::before,.auth-divider::after{content:"";height:1px;flex:1;background:var(--line)}
.auth-otp-panel{margin-top:14px;padding:15px;border:1px solid #cce6db;border-radius:15px;background:var(--green-soft)}
.auth-otp-heading{display:grid;gap:3px}
.auth-otp-heading strong{font-size:16px}
.auth-otp-heading span{color:var(--muted);font-size:13px;line-height:1.55}
.auth-otp-meta{color:var(--muted);font-size:13px}
.auth-otp-form input[name="code"]{font-size:24px;font-weight:900;letter-spacing:.4em;text-align:center}
.binding-admin-card .binding-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px}
.binding-admin-card .binding-meta{display:grid;gap:2px;min-width:0}
.binding-admin-card .binding-meta small{color:var(--muted);overflow-wrap:anywhere}
.tuition-payment-card{margin-bottom:16px;border-color:#e9c986;background:linear-gradient(180deg,#fffaf0,#fff)}
.tuition-payment-row{border-color:#ead7ae;background:#fffdf8}
.tuition-payment-actions{display:grid;justify-items:end;gap:5px}
.tuition-payment-actions small{max-width:260px;text-align:right}
.tuition-payment-row .binding-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px}
.tuition-payment-modal-panel{width:min(680px,100%)}
.tuition-payment-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:14px;padding:13px;border:1px solid var(--line);border-radius:13px;background:#f8fbf9}
.tuition-payment-summary span{color:var(--muted);font-size:12px}
.tuition-payment-summary strong{font-size:18px}
.payment-method-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
.payment-method-choice{display:flex;align-items:center;gap:9px;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer}
.payment-method-choice:has(input:checked){border-color:var(--green);background:var(--green-soft)}
.payment-method-choice input{width:18px;height:18px;accent-color:var(--green)}
.payment-method-choice span{display:grid;gap:1px}
.payment-method-choice small{color:var(--muted)}
.tuition-bank-card{display:grid;gap:8px;padding:16px;border:1px solid #c9dfd5;border-radius:14px;background:linear-gradient(135deg,#eef9f4,#fff)}
.tuition-bank-card .pay-title{color:var(--green);font-size:18px;font-weight:900}
.tuition-bank-card .bank-line{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:6px;border-bottom:1px solid #dcebe4}
.tuition-bank-card .bank-line span{color:var(--muted)}
.tuition-bank-card .account-line strong{font-size:19px;letter-spacing:.04em;overflow-wrap:anywhere}
.tuition-receipt-preview{width:100%;max-height:360px;object-fit:contain;border:1px solid var(--line);border-radius:12px;background:#f5f7f6}
@media (max-width: 760px) {
  .portal-shell { padding: 13px; }
  .portal-head { align-items: flex-start; }
  .grid.two, .grid.three, .summary-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .list-row { grid-template-columns: 1fr 1fr; }
  .list-row > :first-child { grid-column: 1 / -1; }
  .mobile-day-tabs { display: flex; }
  .week-scroll { overflow: visible; }
  .rental-slot { grid-template-columns: 68px 80px 1fr; padding: 10px 9px; }
  .rental-slot-rooms { font-size: 13px; }
  .availability-suggestions{grid-template-columns:1fr}
  .rental-use-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .payment-method-grid,.tuition-payment-summary{grid-template-columns:1fr}
  .tuition-payment-actions{justify-items:start}
  .tuition-payment-actions small{text-align:left}
}

/* 2026-07-27：三個外部入口的手機密集介面；桌機版維持原尺寸。 */
@media (max-width: 760px) {
  body{font-size:11px;line-height:1.42}
  .portal-shell{padding:8px}
  .portal-head{gap:7px;margin-bottom:7px;align-items:center}
  .head-title{gap:7px;min-width:0}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:12px}
  .portal-head h1{font-size:17px}
  .portal-head p{margin-top:1px;font-size:8px}
  .card{padding:9px;border-radius:11px;box-shadow:0 3px 12px rgba(27,62,51,.055)}
  .bind-box{margin-top:3vh}
  .stack,.grid{gap:6px}
  .grid.two,.grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
  .field{gap:3px}.field label{font-size:9px}
  .field input,.field select,.field textarea,.control{min-height:34px;padding:6px 8px;border-radius:8px;font-size:11px}
  .btn{min-height:32px;padding:6px 8px;border-radius:8px;font-size:9px}
  .btn.is-loading::before{width:11px;height:11px}
  .bind-result{gap:6px;margin-top:7px;padding:8px;border-radius:9px}
  .bind-result code{padding:7px;border-radius:7px;font-size:9px;overflow-wrap:anywhere}
  .summary-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;margin-bottom:7px}
  .summary{padding:7px;border-radius:9px;min-width:0}
  .summary span{font-size:7px}.summary strong{margin-top:1px;font-size:13px;overflow:hidden;text-overflow:ellipsis}
  .tabs{gap:4px;margin-bottom:7px;padding-bottom:1px}
  .tabs .btn{min-width:max-content}
  .student-bottom-tabs{gap:4px;padding:6px 7px calc(6px + env(safe-area-inset-bottom))}.student-bottom-tabs .btn{min-width:0;padding:5px 2px;font-size:8px}.student-bottom-tabs+.tab-panel{margin-bottom:62px}
  .section-title{gap:6px;margin-bottom:6px}
  .section-title h2,.section-title h3{font-size:13px}
  .section-title p,.muted{font-size:8px;line-height:1.45}
  .list{gap:5px}
  .list-row{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:5px;padding:7px;border-radius:9px;font-size:9px}
  .list-row>:first-child{grid-column:1/-1;font-size:10px}
  .badge{padding:2px 5px;font-size:7px}
  .period-card,.contact-book-post{padding:8px;border-radius:9px}.period-card-head{gap:7px;margin-bottom:7px}.period-card-title>strong{font-size:12px}.period-card-title>small{font-size:9px}.lesson-slot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:5px}.lesson-slot{min-height:56px;padding:6px;border-radius:8px}.lesson-slot strong{font-size:9px}.lesson-slot span,.lesson-slot small{font-size:8px}
  .period-restored-note{font-size:8px}.upcoming-course-list{margin-bottom:8px}.upcoming-course-title{font-size:10px}.upcoming-course-row{padding:6px 7px}.upcoming-course-row strong{font-size:9px}.upcoming-course-row span{font-size:8px}
  .student-teacher-contact{margin-bottom:7px}.student-contact-row{gap:3px 7px}.student-contact-row span{font-size:8px}.student-contact-row strong{font-size:10px}.period-payment{grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:8px 9px;border-radius:9px}.period-payment-amount span{font-size:9px}.period-payment-amount strong{font-size:16px}.period-payment-state{gap:4px}.period-payment-state small{font-size:8px}.period-payment-state .badge{font-size:9px}.period-payment-state .btn{min-width:76px;min-height:29px;padding:5px 8px;font-size:9px}
  .toolbar{gap:5px;margin-bottom:7px}
  .toolbar .field{min-width:110px}
  .notice{padding:7px;border-radius:8px;font-size:8px}
  .mobile-day-tabs{gap:4px;margin-bottom:5px}
  .mobile-day-tabs .btn{min-height:29px;padding:5px 7px}
  .week-scroll{border-radius:9px}
  .week-grid.mobile-day{grid-template-columns:48px minmax(190px,1fr);grid-template-rows:38px;grid-auto-rows:36px}
  .week-cell.head{font-size:9px}.week-cell.time{font-size:8px}
  .lesson{padding:3px 4px;font-size:8px}.lesson>strong{font-size:10px}.lesson>small{font-size:7px}
  .empty-slot,.closed-slot{font-size:7px}
  .rental-use-grid{gap:5px;margin-bottom:7px}
  .rental-use{min-height:34px;padding:5px;border-radius:8px;font-size:9px}
  .date-strip{gap:4px;padding-bottom:6px}
  .date-chip{min-width:58px}
  .rental-slot{grid-template-columns:54px 64px minmax(0,1fr);gap:5px;padding:7px;border-radius:8px;font-size:9px}
  .rental-slot-rooms{font-size:8px}
  .rental-choice-panel{margin-top:7px;padding-top:8px}
  .rental-match-heading{margin:7px 0 4px;font-size:10px}
  .quick-availability{padding:7px;border-radius:9px}
  .availability-suggestions{gap:4px;max-height:230px}
  .availability-option{padding:6px 7px;border-radius:8px;font-size:9px}
  .availability-option span{font-size:8px}
  .role-question h2{font-size:18px;margin:2px 0 9px}
  .role-buttons{gap:6px}
  .modal{padding:0;align-items:end}
  .modal-panel{width:100%;max-height:94vh;border-radius:15px 15px 0 0}
  .switch-row{gap:7px;padding:7px;border-radius:8px}
  .payroll-day{gap:4px;padding-top:6px}.payroll-day h3{font-size:10px}
  .rental-history-row>:last-child{justify-content:flex-start}
  .teacher-lesson-state-actions{gap:4px;padding-top:5px}
  .binding-admin-card{margin-top:7px!important}
  .portal-session-card{margin-top:3vh;gap:8px}
  .portal-session-spinner{width:22px;height:22px}
  .auth-title{margin-bottom:10px}
  .auth-title h2{font-size:17px}
  .auth-title p{font-size:11px}
  .auth-choice-list{gap:9px}
  .auth-choice{gap:10px;padding:12px;border-radius:12px}
  .auth-choice-heading{gap:9px}
  .auth-choice-heading h3{font-size:15px}
  .auth-choice-heading p{font-size:11px}
  .auth-choice>small,.auth-security-note{font-size:10px}
  .auth-choice-icon{width:39px;height:39px;border-radius:11px;font-size:9px}
  .auth-recommended{padding:3px 7px;font-size:9px}
  .auth-line-button,.auth-regular-submit{min-height:40px;font-size:12px}
  .auth-regular-form .field label,.auth-line-setup .field label{font-size:11px}
  .auth-regular-form .field input,.auth-regular-form .field select,.auth-line-setup .field input,.auth-line-setup .field select{min-height:40px;font-size:13px}
  .auth-divider,.auth-otp-meta{font-size:10px}
  .auth-line-setup{padding:12px;border-radius:12px}
  .auth-otp-panel{margin-top:10px;padding:12px;border-radius:12px}
  .auth-otp-heading strong{font-size:15px}
  .auth-otp-heading span{font-size:11px}
  .auth-otp-form input[name="code"]{font-size:20px;min-height:44px}
  .binding-admin-card .binding-actions{justify-content:flex-start}
}

@media (max-width:390px) {
  .summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid.two,.grid.three{grid-template-columns:1fr}
}