:root {
  --ink: #1c2540;
  --muted: #5b6480;
  --line: #e3e6f0;
  --bg: #f6f7fb;
  --card: #ffffff;
  --primary: #2f4ac8;
  --primary-ink: #ffffff;
  --primary-soft: #eef1fd;
  --sun: #ffd43b;
  --sun-soft: #fff8db;
  --green: #2b8a3e;
  --green-soft: #ebfbee;
  --purple: #7048e8;
  --purple-soft: #f3f0ff;
  --orange: #e8590c;
  --orange-soft: #fff4e6;
  --red: #c92a2a;
  --red-soft: #fff5f5;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(28, 37, 64, 0.06), 0 4px 16px rgba(28, 37, 64, 0.05);
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

* { box-sizing: border-box; }
body { margin: 0; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5rem; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0.25rem 0 0.5rem; }
a { color: var(--primary); }
pre { white-space: pre-wrap; word-break: break-word; margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.95rem; }
.loading { padding: 2rem; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.strong { font-weight: 600; }
.grow { flex: 1; min-width: 0; }
.error { color: var(--red); min-height: 1.25rem; margin: 0.25rem 0; }
.status { min-height: 1.25rem; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: 0.75rem 1.25rem; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.topbar-right { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.who { font-size: 0.9rem; color: var(--muted); }
.banner { padding: 0.6rem 1.25rem; font-size: 0.9rem; border-bottom: 1px solid var(--line); }
.banner.warn { background: var(--sun-soft); color: #5c4400; }

.container { max-width: 1080px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }
.container.student { max-width: 820px; font-size: 1.05rem; }

/* ---------- buttons, inputs ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 0.55rem 1rem; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: #c5cbe0; }
.btn:focus-visible, .chip-btn:focus-visible, .demo-account:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid #91a7ff; outline-offset: 2px;
}
.btn.primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn.primary:hover { background: #2640b0; }
.btn.ghost { background: transparent; }
.btn.small { padding: 0.3rem 0.7rem; font-size: 0.85rem; }
.btn.danger { background: var(--red); border-color: var(--red); color: #fff; }
.btn.danger-outline { color: var(--red); border-color: #ffc9c9; }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }

label { display: block; font-weight: 600; font-size: 0.9rem; margin: 0.75rem 0 0.3rem; }
input, textarea, select {
  width: 100%; font: inherit; color: var(--ink); background: #fff;
  border: 1px solid #cfd4e4; border-radius: 10px; padding: 0.55rem 0.7rem;
}
textarea { resize: vertical; }
.stack > .btn { margin-top: 0.9rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* ---------- cards & layout ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); margin-bottom: 1rem; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; align-items: start; }
.grid > .card { margin-bottom: 0; }
.span-2 { grid-column: span 2; }
.page-head { margin-bottom: 1.25rem; }
.list { display: flex; flex-direction: column; gap: 0.5rem; }
.row { display: flex; align-items: center; gap: 1rem; padding: 0.75rem; border: 1px solid var(--line); border-radius: 12px; }
.link-row { color: inherit; text-decoration: none; }
.link-row:hover { background: var(--primary-soft); border-color: #d6ddfa; }
.row-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-content: flex-end; }
.chip-row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin: 0.5rem 0; }

/* ---------- login ---------- */
.hero { text-align: center; padding: 1.5rem 0 1.75rem; }
.hero h1 { font-size: 2rem; }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 46rem; margin-left: auto; margin-right: auto; }
.hello .lead { margin-left: 0; }
.login-grid { display: grid; grid-template-columns: 3fr 2fr; gap: 1rem; align-items: start; }
.login-form .btn { margin-top: 0.5rem; width: 100%; }
.demo-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.demo-account {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.2rem; text-align: left;
  padding: 0.9rem; border: 1px solid var(--line); border-radius: 12px; background: #fff; font: inherit; color: inherit; cursor: pointer;
}
.demo-account:hover { border-color: var(--primary); background: var(--primary-soft); }

/* ---------- chips & badges ---------- */
.role-chip, .badge, .stage-chip, .skill-chip {
  display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px; font-size: 0.78rem; font-weight: 600; white-space: nowrap;
}
.role-chip.parent { background: var(--purple-soft); color: var(--purple); }
.role-chip.student { background: var(--sun-soft); color: #7a5800; }
.role-chip.teacher { background: var(--green-soft); color: var(--green); }
.badge { background: #f1f3f5; color: #495057; }
.badge.quiet { background: #f1f3f5; color: #6b7280; font-weight: 500; }
.badge.provider { background: var(--primary-soft); color: var(--primary); }
.badge.provider.deepseek, .badge.provider.mock { background: var(--sun-soft); color: #7a5800; }
.badge.sev-high, .badge.sev-self_harm, .badge.sev-danger { background: var(--red-soft); color: var(--red); }
.badge.sev-medium, .badge.sev-upset, .badge.sev-unsure, .badge.sev-error { background: var(--orange-soft); color: var(--orange); }
.badge.sev-low, .badge.sev-personal_info, .badge.sev-inappropriate, .badge.sev-limit { background: var(--primary-soft); color: var(--primary); }
.badges { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-top: 0.5rem; }
.stage-chip { background: #f1f3f5; color: #6b7280; }
.stage-chip.plan { background: var(--primary-soft); color: var(--primary); }
.stage-chip.confirm { background: var(--purple-soft); color: var(--purple); }
.stage-chip.build { background: var(--green-soft); color: var(--green); }
.stage-chip.reflect { background: var(--orange-soft); color: var(--orange); }
.skill-chip { background: var(--green-soft); color: var(--green); font-weight: 500; }
.chip-btn {
  border: 1px solid #cfd4e4; background: #fff; color: var(--ink); border-radius: 999px; padding: 0.45rem 1rem;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.chip-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- project & chat ---------- */
.back { display: inline-block; margin-bottom: 0.75rem; text-decoration: none; font-weight: 600; }
.project-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.stages { list-style: none; display: flex; gap: 0.25rem; padding: 0; margin: 0; flex-wrap: wrap; }
.stages li { display: flex; align-items: center; gap: 0.35rem; padding: 0.3rem 0.65rem; border-radius: 999px; background: #eef0f6; color: var(--muted); font-size: 0.85rem; font-weight: 600; }
.stages .dot { display: inline-grid; place-items: center; width: 1.3rem; height: 1.3rem; border-radius: 50%; background: #fff; font-size: 0.75rem; }
.stages li.done { background: var(--green-soft); color: var(--green); }
.stages li.current { background: var(--primary); color: #fff; }
.stages li.current .dot { color: var(--primary); }

.chat { padding: 0; }
.chat-log { display: flex; flex-direction: column; gap: 0.9rem; padding: 1.25rem; background: #fbfbfe; border-radius: var(--radius) var(--radius) 0 0; }
.empty { text-align: center; padding: 2rem 1rem; }
.msg { max-width: 88%; border-radius: 16px; padding: 0.8rem 1rem; scroll-margin-top: 96px; scroll-margin-bottom: 140px; }
.msg-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin-bottom: 0.2rem; }
.msg.student { align-self: flex-end; background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.msg.student .msg-label { color: rgba(255, 255, 255, 0.8); }
.msg.student .badges .badge { background: rgba(255, 255, 255, 0.92); }
.msg.pending { opacity: 0.6; }
.msg.coach { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.coach.fixed { border-color: #ffd8a8; background: #fffcf5; }
.msg.coach ul { margin: 0.25rem 0 0.5rem; padding-left: 1.25rem; }
.msg.coach li { margin: 0.2rem 0; }
.opener { font-weight: 600; }
.closing { font-weight: 700; color: var(--primary); margin-top: 0.5rem; }
.reminder { font-size: 0.8rem; color: var(--muted); background: #f1f3f5; display: inline-block; padding: 0.1rem 0.5rem; border-radius: 6px; }
.box { border-radius: 10px; padding: 0.65rem 0.8rem; margin: 0.5rem 0; }
.box-label { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
.box.build { background: var(--green-soft); border: 1px solid #b2f2bb; }
.box.build .box-label { color: var(--green); }
.box.aicheck { background: var(--sun-soft); border: 1px solid #ffe066; }
.box.aicheck .box-label { color: #7a5800; }
.composer {
  position: sticky; bottom: 0; padding: 1rem 1.25rem; border-top: 1px solid var(--line); background: #fff;
  border-radius: 0 0 var(--radius) var(--radius); box-shadow: 0 -6px 16px rgba(28, 37, 64, 0.05);
}
.composer-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 0.5rem; }
.composer .status { min-height: 0; margin: 0.4rem 0 0; }
.composer .status:empty { display: none; }
.readonly-note { padding: 1rem 1.25rem; border-top: 1px solid var(--line); margin: 0; background: #fff; border-radius: 0 0 var(--radius) var(--radius); }

/* ---------- dashboards ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0.75rem; margin: 0.5rem 0 1rem; }
.tile { background: var(--primary-soft); border-radius: 12px; padding: 0.8rem; }
.tile-value { font-size: 1.8rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.tile-label { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.highlights { margin: 0 0 0.5rem; padding-left: 1.25rem; }
.alert.sev-high { border-left: 4px solid var(--red); }
.alert.sev-medium { border-left: 4px solid var(--orange); }
.alert.sev-low { border-left: 4px solid var(--primary); }
.alert.acked { opacity: 0.65; }
.table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table th { text-align: left; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--line); }
.table td { padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
.activity + .activity { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }

@media (max-width: 760px) {
  .topbar { position: static; padding: 0.6rem 1rem; }
  .msg { scroll-margin-top: 16px; }
  .composer { padding: 0.75rem 1rem; }
  .composer textarea { font-size: 16px; } /* stops iPhone zooming in on focus */
  .container { padding: 1rem 0.75rem 3rem; }
  .grid, .login-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .demo-grid { grid-template-columns: 1fr; }
  .msg { max-width: 96%; }
  .hero h1 { font-size: 1.6rem; }
  .row { flex-wrap: wrap; }
  .composer-row { flex-direction: column; align-items: stretch; }
  .table { font-size: 0.85rem; }
}