/* AMtutorTools — Afro-Merica Tutor
   Palette follows the tutor's existing brand (navy, blue, orange), on graph-paper white.
   One family: Lexend, designed for reading fluency. */
:root {
  --navy: #002d5f;
  --blue: #005596;
  --blue-soft: #e6f0f9;
  --orange: #e66414;
  --orange-soft: #fff1e6;
  --ink: #1b2733;
  --muted: #5a6878;
  --line: #d9e2ec;
  --grid: #e3ecf6;
  --paper: #f7fafd;
  --white: #fff;
  --green: #0d8a4f;
  --green-soft: #e3f5ec;
  --red: #c42b1c;
  --red-soft: #fdecea;
  --amber: #a15c00;
  --amber-soft: #fff4dc;
  --math: #005596;
  --physics: #e66414;
  --science: #0d8a4f;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(0, 45, 95, .06), 0 4px 14px rgba(0, 45, 95, .06);
  font-size: 16px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: "Lexend", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink); background: var(--paper); line-height: 1.55;
  font-variant-numeric: tabular-nums;
}
/* the graph-paper sheet, used on sign-in and the student home */
.sheet {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  min-height: calc(100vh - 60px);
}
a { color: var(--blue); }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; font-weight: 600; }
h1 { font-size: 1.9rem; letter-spacing: -.01em; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 .8em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.hidden { display: none !important; }

/* ---------- top bar ---------- */
.topbar {
  height: 60px; background: var(--navy); color: #fff; display: flex; align-items: center; gap: 18px;
  padding: 0 20px; border-bottom: 4px solid var(--orange); position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 600; font-size: 1.05rem; white-space: nowrap; }
.brand .mark { width: 34px; height: 34px; border-radius: 9px; background: var(--orange); display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.brand .sub { font-weight: 300; opacity: .8; }
.nav { display: flex; gap: 2px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.nav a { color: #cfe0f2; text-decoration: none; padding: 7px 12px; border-radius: 8px; font-size: .92rem; white-space: nowrap; }
.nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.nav a.on { color: #fff; background: rgba(255, 255, 255, .14); }
.who { display: flex; align-items: center; gap: 10px; font-size: .9rem; white-space: nowrap; }
.who .role { background: rgba(255, 255, 255, .14); padding: 3px 9px; border-radius: 999px; font-size: .78rem; }
.who button { background: none; border: 1px solid rgba(255, 255, 255, .35); color: #fff; border-radius: 8px; padding: 5px 10px; cursor: pointer; }
.who button:hover { border-color: #fff; }

main.page { max-width: 1180px; margin: 0 auto; padding: 28px 20px 64px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; }
.page-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- surfaces ---------- */
.panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 20px; }
.panel + .panel { margin-top: 16px; }
.grid > .panel, .split > .panel, .grid > .figure { margin-top: 0; }
table.data td .btn + .btn, table.data td .btn + a.btn, table.data td a.btn + .btn { margin-left: 4px; }
.panel > h2:first-child, .panel > h3:first-child { margin-top: 0; }
.grid { display: grid; gap: 16px; }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) {
  .cols-3, .cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cols-2, .split { grid-template-columns: 1fr; }
  .brand .sub { display: none; }
}
@media (max-width: 560px) {
  .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .topbar { padding: 8px 12px 0; gap: 8px 10px; flex-wrap: wrap; height: auto; min-height: 60px; }
  .topbar .nav { order: 3; flex-basis: 100%; padding-bottom: 6px; }
  .who .name, .who .role { display: none; }
  main.page { padding: 20px 14px 56px; }
  h1 { font-size: 1.5rem; }
}

/* figures: number + label, used sparingly on adult dashboards */
.figure { padding: 14px 16px; border-left: 4px solid var(--blue); background: var(--white); border-radius: 0 var(--radius) var(--radius) 0; }
.figure b { display: block; font-size: 1.6rem; font-weight: 600; line-height: 1.15; }
.figure span { color: var(--muted); font-size: .88rem; }
.figure.warn { border-left-color: var(--orange); }

/* ---------- buttons & forms ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1.5px solid var(--line); background: var(--white); color: var(--ink);
  border-radius: var(--radius); padding: 8px 14px; cursor: pointer; font-weight: 500; text-decoration: none; font-size: .95rem; line-height: 1.2;
}
.btn:hover { border-color: var(--blue); color: var(--blue); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover { background: #00467d; color: #fff; }
.btn.accent { background: var(--orange); border-color: var(--orange); color: #fff; }
.btn.accent:hover { background: #cc560f; color: #fff; }
.btn.danger { color: var(--red); }
.btn.danger:hover { border-color: var(--red); }
.btn.small { padding: 5px 10px; font-size: .85rem; }
.btn.big { padding: 13px 22px; font-size: 1.05rem; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: .9rem; font-weight: 500; margin-bottom: 5px; }
.field > small { display: block; color: var(--muted); font-size: .82rem; margin-top: 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=search], select, textarea {
  width: 100%; border: 1.5px solid var(--line); border-radius: var(--radius); padding: 9px 11px; background: var(--white);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
textarea { min-height: 120px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .88rem; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; margin-bottom: 14px; }
.check input { margin-top: 4px; width: 18px; height: 18px; accent-color: var(--blue); }
.form-error { background: var(--red-soft); color: var(--red); border-radius: var(--radius); padding: 9px 12px; margin-bottom: 14px; font-size: .92rem; }
.form-note { background: var(--blue-soft); color: var(--navy); border-radius: var(--radius); padding: 9px 12px; margin-bottom: 14px; font-size: .92rem; }
.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline > input, .inline > select { width: auto; flex: 1; min-width: 140px; }

/* toggle chips used in plan editors */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1.5px solid var(--line); background: var(--white); border-radius: 999px; padding: 4px 12px; cursor: pointer; font-size: .9rem; min-width: 38px; }
.chip.on { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
table.data { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.data th { text-align: left; font-weight: 500; color: var(--muted); background: #f3f7fb; padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.data td { padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.data tr:last-child td { border-bottom: none; }
table.data tr.link { cursor: pointer; }
table.data tr.link:hover td { background: #f6f9fd; }
table.data td.num, table.data th.num { text-align: right; }
.empty { padding: 28px; text-align: center; color: var(--muted); }

/* status tags */
.tag { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .78rem; font-weight: 500; background: #eef2f6; color: var(--muted); white-space: nowrap; }
.tag.good { background: var(--green-soft); color: var(--green); }
.tag.bad { background: var(--red-soft); color: var(--red); }
.tag.warn { background: var(--amber-soft); color: var(--amber); }
.tag.info { background: var(--blue-soft); color: var(--blue); }
.subject { display: inline-flex; align-items: center; gap: 6px; font-size: .82rem; color: var(--muted); }
.subject::before { content: ""; width: 9px; height: 9px; border-radius: 2px; background: var(--math); }
.subject.physics::before { background: var(--physics); }
.subject.science::before, .subject.chemistry::before { background: var(--science); }

/* accuracy meter */
.meter { display: inline-flex; align-items: center; gap: 8px; }
.meter i { display: block; width: 70px; height: 7px; border-radius: 4px; background: #eef2f6; overflow: hidden; }
.meter i u { display: block; height: 100%; background: var(--green); }
.meter.mid i u { background: #d99a1c; }
.meter.low i u { background: var(--red); }

/* tabs inside a page */
.tabs { display: flex; gap: 4px; border-bottom: 1.5px solid var(--line); margin-bottom: 18px; overflow-x: auto; }
.tabs button { background: none; border: none; padding: 10px 14px; cursor: pointer; color: var(--muted); font-weight: 500; border-bottom: 3px solid transparent; margin-bottom: -1.5px; white-space: nowrap; }
.tabs button.on { color: var(--blue); border-bottom-color: var(--orange); }

/* ---------- sign in ---------- */
.auth { display: grid; place-items: center; padding: 48px 16px; }
.auth-card { width: 100%; max-width: 440px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 28px; box-shadow: var(--shadow); }
.auth-card h1 { font-size: 1.55rem; }
.who-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; background: #eef3f9; padding: 5px; border-radius: 12px; margin-bottom: 22px; }
.who-picker button { border: none; background: none; padding: 10px; border-radius: 9px; cursor: pointer; font-weight: 500; color: var(--muted); }
.who-picker button.on { background: var(--white); color: var(--navy); box-shadow: 0 1px 3px rgba(0, 0, 0, .08); }
.pin-input { font-size: 1.8rem !important; letter-spacing: .5em; text-align: center; font-weight: 600; }
.auth-foot { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); font-size: .92rem; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

/* ---------- student home ---------- */
.hello { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 4px 0 26px; }
.hello h1 { font-size: 2.4rem; font-weight: 700; color: var(--navy); margin: 0; }
.hello h1 .eq { color: var(--orange); font-weight: 400; }
.streak { background: var(--white); border: 1.5px solid var(--line); border-radius: 999px; padding: 8px 16px; font-weight: 500; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.tool-tile {
  display: flex; flex-direction: column; background: var(--white); border: 1.5px solid var(--line); border-radius: var(--radius-lg);
  padding: 20px 20px 18px; text-decoration: none; color: var(--ink); position: relative; overflow: hidden; min-height: 190px;
  border-top: 6px solid var(--math);
}
.tool-tile.physics { border-top-color: var(--physics); }
.tool-tile.science, .tool-tile.chemistry { border-top-color: var(--science); }
.tool-tile:hover { border-color: var(--blue); border-top-color: inherit; box-shadow: var(--shadow); }
.tool-tile.physics:hover { border-top-color: var(--physics); }
.tool-tile .icon { font-size: 2.3rem; line-height: 1; margin-bottom: 12px; }
.tool-tile h2 { font-size: 1.25rem; margin-bottom: 6px; }
.tool-tile p { color: var(--muted); font-size: .9rem; flex: 1; }
.tool-tile .foot { display: flex; justify-content: space-between; align-items: center; font-size: .85rem; color: var(--muted); }
.tool-tile .go { color: var(--orange); font-weight: 600; }
.tool-tile .plan-note { background: var(--orange-soft); color: #7a3a07; border-radius: 8px; padding: 6px 10px; font-size: .84rem; margin: -2px 0 10px; }
.badges { display: flex; flex-wrap: wrap; gap: 10px; }
.badge { display: flex; align-items: center; gap: 8px; background: var(--white); border: 1.5px solid var(--line); border-radius: 12px; padding: 7px 12px; font-size: .88rem; }
.badge .bi { font-size: 1.3rem; }

/* ---------- play (tool in a frame) ---------- */
.play { position: fixed; inset: 0; display: flex; flex-direction: column; background: var(--paper); z-index: 50; }
.play-bar { height: 46px; flex: none; display: flex; align-items: center; gap: 12px; padding: 0 12px; background: var(--navy); color: #fff; }
.play-bar a, .play-bar button { color: #fff; text-decoration: none; background: rgba(255, 255, 255, .12); border: none; border-radius: 8px; padding: 6px 12px; cursor: pointer; font-size: .9rem; }
.play-bar a:hover, .play-bar button:hover { background: rgba(255, 255, 255, .22); }
.play-bar .t { font-weight: 500; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.play iframe { flex: 1; width: 100%; border: 0; background: #fff; }
.play { height: 100dvh; }
@media (max-width: 700px), (max-height: 520px) {
  .play-bar { height: 40px; gap: 8px; padding: 0 8px; }
  .play-bar a, .play-bar button { padding: 4px 10px; font-size: .85rem; }
  .play-bar .note { display: none; }
}

/* ---------- people / child cards ---------- */
.kid-card { display: block; background: var(--white); border: 1.5px solid var(--line); border-radius: var(--radius-lg); padding: 18px; text-decoration: none; color: var(--ink); }
.kid-card:hover { border-color: var(--blue); }
.kid-card h2 { margin-bottom: 2px; }
.kid-card dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 14px 0 0; }
.kid-card dt { font-size: .8rem; color: var(--muted); }
.kid-card dd { margin: 0; font-size: 1.2rem; font-weight: 600; }

/* bar chart (minutes per day) */
.bars { display: flex; align-items: flex-end; gap: 3px; height: 120px; padding-top: 6px; }
.bars div { flex: 1; background: var(--blue); border-radius: 3px 3px 0 0; min-height: 2px; position: relative; }
.bars div.zero { background: #e7edf4; }
.bars div:hover::after {
  content: attr(data-tip); position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%);
  background: var(--navy); color: #fff; padding: 4px 8px; border-radius: 6px; font-size: .75rem; white-space: nowrap; z-index: 3;
}
.bars-axis { display: flex; justify-content: space-between; font-size: .75rem; color: var(--muted); margin-top: 6px; }

/* ---------- modal & toast ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(0, 29, 61, .45); display: grid; place-items: center; z-index: 100; padding: 16px; }
.modal { background: var(--white); border-radius: 18px; width: 100%; max-width: 560px; max-height: calc(100vh - 32px); overflow: auto; padding: 24px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25); }
.modal.wide { max-width: 860px; }
.modal h2 { margin-top: 0; }
.modal .btn-row { justify-content: flex-end; margin-top: 18px; }
#toasts { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: .93rem; max-width: 90vw; }
.toast.bad { background: var(--red); }
@media (prefers-reduced-motion: no-preference) {
  .toast { animation: rise .25s ease-out; }
  @keyframes rise { from { transform: translateY(8px); opacity: 0; } }
}

/* credential cards for printing */
.cred-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.cred { border: 1.5px dashed var(--line); border-radius: 12px; padding: 12px 14px; }
.cred b { display: block; font-size: 1.05rem; }
.cred code { white-space: nowrap; font-size: 1.05rem; background: var(--blue-soft); padding: 1px 6px; border-radius: 5px; }
.code-big { font-size: 1.6rem; font-weight: 700; letter-spacing: .08em; background: var(--orange-soft); color: #7a3a07; padding: 8px 14px; border-radius: 10px; display: inline-block; }
@media print {
  body * { visibility: hidden; }
  .print-area, .print-area * { visibility: visible; }
  .print-area { position: absolute; left: 0; top: 0; width: 100%; }
  .no-print { display: none !important; }
}

/* ---------- messages ---------- */
.nav a .nbadge, .nbadge { display: inline-grid; place-items: center; min-width: 19px; height: 19px; padding: 0 5px; margin-left: 6px; border-radius: 999px; background: var(--orange); color: #fff; font-size: .72rem; font-weight: 600; line-height: 1; vertical-align: 1px; }
.nav a .nbadge[hidden], .nbadge[hidden] { display: none; }
.callout { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--orange-soft); border: 1px solid #f6c9a5; color: var(--ink); text-decoration: none; border-radius: var(--radius-lg); padding: 14px 18px; margin-bottom: 20px; font-size: 1.02rem; }
.callout .go { margin-left: auto; color: var(--orange); font-weight: 600; }
main.page.page-wide { max-width: 1320px; padding-top: 18px; padding-bottom: 18px; }
.msg-wrap { display: grid; grid-template-columns: 320px minmax(0, 1fr); gap: 16px; height: calc(100dvh - 60px - 36px); min-height: 460px; }
.msg-wrap.solo { grid-template-columns: minmax(0, 1fr); max-width: 900px; margin: 0 auto; }
.msg-list { padding: 0; display: flex; flex-direction: column; overflow: hidden; }
.msg-list-head { padding: 16px 16px 10px; border-bottom: 1px solid var(--line); }
.msg-list-head h2 { margin-bottom: 10px; }
.msg-list-head input { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
#tlist { overflow-y: auto; flex: 1; padding: 6px; }
.thread-item { display: flex; gap: 10px; align-items: center; padding: 10px; border-radius: 12px; text-decoration: none; color: var(--ink); }
.thread-item:hover { background: var(--paper); } .thread-item.on { background: var(--blue-soft); }
.thread-item .avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-size: .8rem; font-weight: 600; flex: none; }
.thread-item .ti { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.thread-item .ti b { font-weight: 600; }
.thread-item .prev { font-size: .82rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thread-item .tm { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex: none; }
.thread-item .tm .nbadge { margin: 0; }
.msg-thread { padding: 0; display: flex; flex-direction: column; overflow: hidden; position: relative; }
.msg-thread.drop { outline: 3px dashed var(--blue); outline-offset: -6px; }
.msg-thread > .empty { margin: auto; max-width: 420px; }
.th-head { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.th-head h2 { margin: 0 0 2px; font-size: 1.2rem; }
.th-title { flex: 1; min-width: 0; } .th-title .tag { margin-right: 4px; }
.th-actions { display: flex; gap: 6px; }
.th-back { display: none; }
.msgs { flex: 1; overflow-y: auto; padding: 14px 18px; background: var(--paper); display: flex; flex-direction: column; gap: 10px; }
.msgs .empty { margin: auto; }
.day { text-align: center; margin: 6px 0; } .day span { background: #eef3f8; color: var(--muted); font-size: .78rem; padding: 3px 10px; border-radius: 999px; }
.msg { max-width: min(640px, 86%); align-self: flex-start; }
.msg.mine { align-self: flex-end; }
.msg .meta { font-size: .78rem; color: var(--muted); margin: 0 6px 3px; display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.msg.mine .meta { justify-content: flex-end; }
.msg .meta .tag { font-size: .7rem; padding: 1px 7px; }
.tag.role-tutor { background: #e8eefc; color: #2843a8; } .tag.role-parent { background: var(--green-soft); color: var(--green); } .tag.role-admin { background: #f1e8fb; color: #6b2fb3; } .tag.role-student { background: var(--orange-soft); color: #a8470a; }
.linkbtn { border: none; background: none; color: var(--muted); cursor: pointer; font-size: .75rem; text-decoration: underline; padding: 0 2px; opacity: 0; }
.msg:hover .linkbtn, .msg:focus-within .linkbtn { opacity: 1; }
@media (hover: none) { .linkbtn { opacity: .7; } }
.bubble { background: #fff; border: 1px solid var(--line); border-radius: 16px 16px 16px 4px; padding: 10px 14px; box-shadow: 0 1px 1px rgba(0, 45, 95, .04); }
.msg.mine .bubble { background: var(--blue-soft); border-color: #c9dcef; border-radius: 16px 16px 4px 16px; }
.bubble.deleted { color: var(--muted); font-style: italic; background: transparent; }
.bubble .text { white-space: pre-wrap; overflow-wrap: anywhere; }
.bubble .files { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.bubble .text + .files { margin-top: 10px; }
.bubble .file { display: flex; gap: 10px; align-items: center; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 8px 12px; text-decoration: none; color: var(--ink); max-width: 100%; min-width: 200px; }
.bubble .file:hover { border-color: var(--blue); }
.bubble .file .fi { font-size: 1.5rem; } .bubble .file b { display: block; font-weight: 500; font-size: .9rem; overflow-wrap: anywhere; } .bubble .file small { color: var(--muted); }
.bubble .file .dl { margin-left: auto; color: var(--blue); font-weight: 600; }
.bubble .thumb { display: inline-flex; flex-direction: column; gap: 3px; text-decoration: none; color: var(--muted); font-size: .78rem; max-width: 260px; }
.bubble .thumb.broken img { display: none; }
.bubble .thumb.broken span::before { content: "🖼️ "; }
.bubble .thumb img { display: block; max-width: 260px; max-height: 220px; border-radius: 10px; border: 1px solid var(--line); object-fit: cover; }
.hw { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; background: var(--orange-soft); border: 1px solid #f6c9a5; border-radius: 10px; padding: 8px 10px; margin-bottom: 8px; font-size: .9rem; }
.hw .hw-st { font-weight: 600; color: var(--amber); } .hw.done { background: var(--green-soft); border-color: #a9dcc2; } .hw.done .hw-st { color: var(--green); }
.hw .btn { margin-left: auto; }
.composer { border-top: 1px solid var(--line); padding: 10px 14px 12px; background: #fff; }
.composer .row { display: flex; gap: 8px; align-items: flex-end; }
.composer textarea { font-family: inherit; font-size: 1rem; flex: 1; resize: none; border: 1px solid var(--line); border-radius: 14px; padding: 10px 14px; min-height: 44px; max-height: 220px; line-height: 1.4; }
.composer textarea:focus { outline: none; border-color: var(--blue); }
.composer .attach { padding: 9px 13px; font-size: 1.1rem; cursor: pointer; }
.composer .opts { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.composer .opts:empty { display: none; }
.chip { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 4px 12px; font-size: .85rem; cursor: pointer; }
.chip input[type=checkbox] { accent-color: var(--blue); }
.chip input[type=date] { border: 1px solid var(--line); border-radius: 8px; padding: 2px 6px; font-size: .85rem; }
.pend { display: flex; flex-wrap: wrap; gap: 6px; }
.pend:not(:empty) { margin-bottom: 8px; }
.pfile { display: inline-flex; align-items: center; gap: 6px; background: var(--blue-soft); border-radius: 999px; padding: 4px 6px 4px 12px; font-size: .85rem; max-width: 100%; }
.pfile small { color: var(--muted); } .pfile.err { background: var(--red-soft); } .pfile.err small { color: var(--red); }
.pfile button { border: none; background: rgba(0, 0, 0, .06); border-radius: 50%; width: 22px; height: 22px; cursor: pointer; font-size: .7rem; }
.composer .hint { margin-top: 6px; }
.also-list { max-height: 50vh; overflow-y: auto; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin-bottom: 14px; }
@media (max-width: 800px) {
  main.page.page-wide { padding: 0; }
  .msg-wrap { grid-template-columns: minmax(0, 1fr); gap: 0; height: calc(100dvh - 60px); min-height: 0; }
  .msg-wrap .panel { border-radius: 0; border-left: none; border-right: none; }
  .msg-wrap.has-thread .msg-list { display: none; }
  .msg-wrap:not(.has-thread) .msg-thread { display: none; }
  .th-back { display: inline-flex; }
  .th-head { padding: 10px 12px; }
  .th-actions .btn:not(#hwOnly) { display: none; }
  .msgs { padding: 12px 10px; }
  .msg { max-width: 92%; }
  .composer .hint { display: none; }
  .bubble .file { min-width: 0; }
  .bubble .thumb img { max-width: 200px; }
}

/* ---------- students: select and assign a tutor ---------- */
.bulkbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--blue-soft); border: 1px solid #c9dcef; border-radius: var(--radius); padding: 8px 12px; margin-bottom: 12px; position: sticky; top: 8px; z-index: 5; }
.bulkbar[hidden] { display: none; }
td.pick { cursor: default; } td.pick input, #pickAll { width: 18px; height: 18px; accent-color: var(--blue); }
.th-tabs { display: flex; gap: 6px; padding: 8px 14px; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; background: #fff; }
.th-tab { flex: none; display: inline-flex; align-items: center; gap: 4px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); font-size: .86rem; white-space: nowrap; }
.th-tab:hover { border-color: var(--blue); } .th-tab.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.th-tab .nbadge { margin-left: 2px; }
.composer[hidden] { display: none; }
.chip[hidden] { display: none; }