/* Rooster school portal. Tokens mirror app/lib/theme.dart (light: the icon's sky at first
   light; dark: its night sky). System fonts only. */

:root {
  --bg: #EEF1FA;            /* alba: the icon's sky at first light */
  --card: #FFFFFF;          /* papel */
  --sand: #E3E7F4;          /* bruma */
  --sand-dark: #D5DAEE;     /* bruma oscura */
  --border: #DCE0F0;        /* hilo */
  --text: #1F2233;          /* tinta */
  --text-soft: #5C6075;     /* tintaSuave */
  --primary: #3F4A8A;       /* indigo */
  --primary-deep: #1C2451;  /* indigoProfundo */
  --primary-mist: #E2E6F8;  /* brumaIndigo */
  --on-primary: #FFFFFF;
  --accent: #E6A83F;        /* sol */
  --on-accent: #2B1F06;     /* solTexto */
  --accent-mist: #FBEBCB;   /* brumaDorada */
  --danger: #C2473C;        /* cresta */
  --on-danger-mist: #5A1F19;
  --danger-mist: #FADDD9;   /* brumaCresta */
  --success: #3E8E6A;       /* musgo */
  --success-mist: #DCEFE3;  /* brumaMusgo */
  --on-success-mist: #163F2C;
  --shadow: 0 1px 2px rgba(31, 34, 51, .06), 0 6px 20px -8px rgba(31, 34, 51, .12);
  --r-card: 20px;
  --r-button: 16px;
  --r-field: 14px;
  --r-dialog: 24px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151A38;            /* noche: the icon's night sky */
    --card: #1E2446;          /* noche2 */
    --sand: #283058;          /* noche3 */
    --sand-dark: #333C6A;     /* noche4 */
    --border: #3A4370;        /* hiloOscuro */
    --text: #F2F3FA;          /* albaTexto */
    --text-soft: #AEB4D4;     /* albaSuave */
    --primary: #B4BCF2;       /* indigoClaro */
    --primary-deep: #DCE0FA;
    --primary-mist: #343D7A;  /* indigoNoche */
    --on-primary: #151A38;
    --accent: #F2C266;        /* solNoche */
    --on-accent: #2B1F06;
    --accent-mist: #4A3812;   /* ambarOscuro */
    --danger: #F09A91;        /* crestaClara */
    --on-danger-mist: #FADDD9;
    --danger-mist: #5A2621;   /* crestaOscura */
    --success: #8FD1AF;       /* musgoClaro */
    --success-mist: #1F3A2C;  /* musgoOscuro */
    --on-success-mist: #DCEFE3;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -10px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}
h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
img { display: block; }
.hidden { display: none !important; }
.muted { color: var(--text-soft); }
.small { font-size: .875rem; }
.nowrap { white-space: nowrap; }
.loading { color: var(--text-soft); padding: 32px 0; text-align: center; }
.noscript { padding: 24px; text-align: center; }

/* --- top bar ---------------------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; }
.brand img { width: 34px; height: 34px; border-radius: 10px; }
.brand span small { display: block; font-weight: 500; font-size: .75rem; color: var(--text-soft); }
.brand:hover { text-decoration: none; }
.topbar .spacer { flex: 1; }
.topbar .crumb { display: flex; align-items: center; gap: 8px; min-width: 0; }
.topbar .crumb .sep { color: var(--text-soft); }
.topbar .crumb strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 36vw; }
.topbar .who { display: flex; align-items: center; gap: 8px; min-width: 0; }
.topbar .who .email { font-size: .85rem; color: var(--text-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 40vw; }
.topbar select { width: auto; min-height: 34px; padding: 6px 28px 6px 10px; border-radius: 10px; }
.topbar .back { font-size: .9rem; }

/* --- layout ----------------------------------------------------------------------------- */
.main { max-width: 1040px; margin: 0 auto; padding: 24px 20px 64px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head .meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 6px; color: var(--text-soft); }
.stack { display: grid; gap: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.row.end { justify-content: flex-end; }
.section { margin-top: 28px; }
.section > h2, .section > h3 { margin-bottom: 10px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.card.compact { padding: 14px 16px; }
.card.link { display: block; color: inherit; transition: transform .12s ease, box-shadow .12s ease; }
.card.link:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 2px 4px rgba(31,34,51,.08), 0 12px 28px -10px rgba(31,34,51,.2); }
.card.danger { border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); }
.card h3 + p { margin-top: 4px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin: 16px 0 20px; overflow-x: auto; }
.tabs a {
  padding: 10px 14px; color: var(--text-soft); font-weight: 600; white-space: nowrap;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tabs a:hover { text-decoration: none; color: var(--text); }
.tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }

.empty { padding: 28px 20px; text-align: center; color: var(--text-soft); border: 1px dashed var(--border); border-radius: var(--r-card); }

/* --- buttons ---------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 16px; border-radius: var(--r-button);
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-weight: 600; cursor: pointer; line-height: 1.2; text-decoration: none;
  transition: background .12s ease, border-color .12s ease, opacity .12s ease;
}
.btn:hover { background: var(--sand); text-decoration: none; }
.btn:disabled, .btn[aria-busy="true"] { opacity: .55; cursor: default; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-deep); border-color: var(--primary-deep); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.btn.danger:hover { background: var(--danger-mist); }
.btn.danger.solid { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; color: var(--primary); }
.btn.ghost:hover { background: var(--primary-mist); }
.btn.small { padding: 5px 10px; font-size: .85rem; border-radius: 12px; }
.btn.icon { padding: 6px; width: 32px; height: 32px; border-radius: 10px; }
.btn[aria-busy="true"]::before {
  content: ""; width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- forms ------------------------------------------------------------------------------ */
.form { display: grid; gap: 14px; align-content: start; }
.form .fields { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.form .fields.two { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.field { display: grid; gap: 5px; min-width: 0; }
.field.span { grid-column: 1 / -1; }
.field > label, .label { font-size: .85rem; font-weight: 600; color: var(--text-soft); }
.field .hint { font-size: .8rem; color: var(--text-soft); }
input[type="text"], input[type="email"], input[type="password"], input[type="date"], input[type="time"], input[type="search"], select, textarea {
  width: 100%; padding: 9px 12px; min-height: 40px;
  border: 1px solid var(--border); border-radius: var(--r-field);
  background: var(--card); color: var(--text);
}
input:focus-visible, select:focus-visible, textarea:focus-visible, .btn:focus-visible, .chips-input:focus-within {
  outline: 2px solid var(--primary); outline-offset: 1px;
}
textarea { resize: vertical; min-height: 72px; }
select { appearance: none; -webkit-appearance: none; padding-right: 32px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-soft) 50%), linear-gradient(135deg, var(--text-soft) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; cursor: pointer; min-height: 40px; }
.check input { width: 18px; height: 18px; accent-color: var(--primary); }
input[type="file"] { font-size: .9rem; width: 100%; max-width: 100%; }
.grid > *, .fields > *, .card { min-width: 0; }
.form .actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
.form-error { color: var(--danger); font-size: .875rem; }

.chips-input {
  display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 8px; min-height: 40px;
  border: 1px solid var(--border); border-radius: var(--r-field); background: var(--card); cursor: text;
}
.chips-input input { flex: 1; min-width: 120px; border: 0; outline: 0; padding: 4px; background: transparent; min-height: 0; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px; border-radius: 999px; font-size: .82rem; font-weight: 600;
  background: var(--accent-mist); color: var(--on-accent);
}
@media (prefers-color-scheme: dark) { .chip { color: var(--accent); } }
.chip button { border: 0; background: transparent; padding: 0; cursor: pointer; color: inherit; font-size: 1rem; line-height: 1; opacity: .7; }
.chip button:hover { opacity: 1; }
.chip.neutral { background: var(--sand); color: var(--text); }
.chip.primary { background: var(--primary-mist); color: var(--primary-deep); }
@media (prefers-color-scheme: dark) { .chip.primary { color: var(--primary); } }
.chip.accent { background: var(--accent); color: var(--on-accent); }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .75rem; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; }
.badge.admin { background: var(--primary-mist); color: var(--primary-deep); }
.badge.teacher { background: var(--success-mist); color: var(--on-success-mist); }
.badge.pending { background: var(--accent-mist); color: var(--on-accent); }
@media (prefers-color-scheme: dark) {
  .badge.admin { color: var(--primary); }
  .badge.pending { color: var(--accent); }
}
.status { font-weight: 600; font-size: .875rem; }
.status.created { color: var(--success); }
.status.duplicate, .status.already_member { color: var(--text-soft); }
.status.invalid_email, .status.no_email { color: var(--danger); }
.status.answer.yes, .status.answer.signed { color: var(--success); }
.status.answer.no { color: var(--danger); }
.status.answer.missing { color: var(--text-soft); font-weight: 500; }
tr.missing td { color: var(--text-soft); }

/* --- tables ----------------------------------------------------------------------------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-soft); font-weight: 700; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.actions { text-align: right; white-space: nowrap; }

/* --- events ----------------------------------------------------------------------------- */
.event { display: grid; grid-template-columns: 64px 1fr; gap: 14px; align-items: start; }
.event .date-box {
  text-align: center; border-radius: 14px; padding: 6px 4px; background: var(--primary-mist); color: var(--primary-deep);
}
@media (prefers-color-scheme: dark) { .event .date-box { color: var(--primary); } }
.event .date-box .d { font-size: 1.45rem; font-weight: 800; line-height: 1.1; }
.event .date-box .m { font-size: .72rem; text-transform: uppercase; font-weight: 700; letter-spacing: .05em; }
.event.past .date-box { background: var(--sand); color: var(--text-soft); }
.event .body { min-width: 0; display: grid; gap: 6px; }
.event .title { font-weight: 700; font-size: 1.05rem; }
.event .when { color: var(--text-soft); font-size: .9rem; }
.event .chips { display: flex; gap: 6px; flex-wrap: wrap; }
.event .counters { font-size: .875rem; color: var(--text-soft); }
.event .counters strong { color: var(--text); }
.event .notes { white-space: pre-wrap; font-size: .92rem; }
.event .ev-actions { display: flex; gap: 6px; justify-content: flex-end; flex-wrap: wrap; }
.event .responses { display: grid; gap: 6px; justify-items: start; padding: 8px 10px; border-radius: 12px; background: var(--sand); }
.event .responses .counters { color: var(--text); }
.event .responses .table-wrap { width: 100%; }
.notice { display: grid; gap: 8px; }
.notice .title { font-weight: 700; font-size: 1.05rem; }
.notice .notes { white-space: pre-wrap; font-size: .95rem; }
.notice .counters { font-size: .875rem; color: var(--text-soft); }
.notice .ev-actions { display: flex; gap: 6px; justify-content: flex-end; flex-wrap: wrap; }
details.past-list > summary { cursor: pointer; font-weight: 600; color: var(--text-soft); padding: 8px 0; list-style: none; display: flex; align-items: center; gap: 8px; }
details.past-list > summary::before { content: "▸"; font-size: .9rem; transition: transform .15s; }
details.past-list[open] > summary::before { transform: rotate(90deg); }
details.past-list > .stack { margin-top: 10px; }

/* --- join code -------------------------------------------------------------------------- */
.code-box { text-align: center; padding: 28px 16px; }
.code-box .code {
  font-family: var(--mono); font-size: clamp(1.6rem, 7vw, 2.6rem); font-weight: 700; letter-spacing: .12em;
  padding: 12px 20px; border-radius: 16px; background: var(--accent-mist); color: var(--on-accent); display: inline-block; margin: 12px 0 18px;
  user-select: all;
}
@media (prefers-color-scheme: dark) { .code-box .code { color: var(--accent); } }

/* --- sign in ---------------------------------------------------------------------------- */
.signin { max-width: 440px; margin: 6vh auto 0; display: grid; gap: 20px; }
.signin .hero { display: grid; justify-items: center; text-align: center; gap: 10px; }
.signin .hero img { width: 88px; height: 88px; border-radius: 24px; }
.signin .hero .tag { color: var(--text-soft); }
.signin .links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; font-size: .9rem; }
.signin .divider { display: flex; align-items: center; gap: 10px; color: var(--text-soft); font-size: .85rem; }
.signin .divider::before, .signin .divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.callout { padding: 12px 14px; border-radius: 14px; background: var(--primary-mist); color: var(--primary-deep); font-size: .9rem; }
@media (prefers-color-scheme: dark) { .callout { color: var(--text); } }
.callout.warn { background: var(--accent-mist); color: var(--on-accent); }
@media (prefers-color-scheme: dark) { .callout.warn { color: var(--text); } }
.callout.verify { margin-bottom: 20px; display: grid; gap: 4px; }
.callout.error { background: var(--danger-mist); color: var(--on-danger-mist); }

/* --- toasts & dialog -------------------------------------------------------------------- */
.toasts { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); display: grid; gap: 8px; z-index: 50; width: min(92vw, 480px); }
.toast {
  padding: 12px 16px; border-radius: 14px; background: var(--text); color: var(--bg);
  box-shadow: var(--shadow); font-size: .92rem; animation: rise .18s ease-out;
}
.toast.error { background: var(--danger); color: #fff; }
.toast.success { background: var(--success); color: #fff; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.dialog { border: 0; border-radius: var(--r-dialog); padding: 0; background: var(--card); color: var(--text); box-shadow: var(--shadow); width: min(92vw, 440px); }
.dialog::backdrop { background: rgba(20, 21, 31, .45); }
.dialog .inner { padding: 22px 22px 18px; display: grid; gap: 12px; }
.dialog .inner p { color: var(--text-soft); }
.dialog .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 6px; }

/* --- responsive ------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .main { padding: 16px 14px 56px; }
  .topbar { padding: 8px 14px; gap: 8px; }
  .brand span small { display: none; }
  .topbar .who .email { display: none; }
  .card { padding: 14px 14px; border-radius: 16px; }
  .event { grid-template-columns: 54px 1fr; gap: 10px; }
  .event .date-box .d { font-size: 1.25rem; }
  th, td { padding: 8px 6px; }
  h1 { font-size: 1.35rem; }
}
@media (max-width: 400px) {
  .topbar .crumb strong { max-width: 28vw; }
  .form .actions .btn { flex: 1; }
}

/* Help: the "?" in the top bar and its panel. */
.topbar .btn.help { width: 34px; min-width: 34px; padding: 0; border-radius: 50%; font-weight: 800; }
.help-panel { max-width: 560px; }
.help-list { margin: 8px 0 4px; padding-left: 20px; display: grid; gap: 10px; line-height: 1.5; }
.help-list li::marker { color: var(--accent); }