/* ===== ห้องเรียนออนไลน์ ใบบุญลำพูน — design system ===== */
:root {
  --green-900:#0a3a28; --green-800:#0e5a3a; --green-700:#127a50;
  --green-600:#1fa971; --green-500:#33c07a; --green-100:#dcf3e5; --green-50:#eef8f1;
  --amber-500:#f4b740;
  --forest:#0e5a3a; --leaf:#1fa971; --lime:#8fe0a0; --sun:#f4b740; --cream:#fbfaf5;
  --ink:#122019; --slate-600:#4b5b54; --slate-400:#8aa197; --slate-200:#e3ebe6;
  --bg:#eef6f0; --white:#ffffff;
  --radius:20px; --radius-sm:12px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.10);
  --shadow-md:0 4px 12px rgba(6,78,59,.08), 0 12px 28px rgba(6,78,59,.10);
  --shadow-lg:0 20px 45px rgba(6,78,59,.16);
  --maxw:960px;
  font-family:'Sarabun', system-ui, -apple-system, sans-serif;
}
* { box-sizing:border-box; }
html,body { margin:0; padding:0; }
body {
  background:
    radial-gradient(900px 480px at 108% -8%, var(--green-100), transparent 55%),
    radial-gradient(680px 480px at -8% 108%, #e2f2e8, transparent 55%),
    var(--bg);
  background-attachment:fixed;
  color:var(--ink); line-height:1.6; min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand__name { font-family:'Prompt', system-ui, sans-serif; font-weight:600; line-height:1.25; }
a { color:var(--green-700); text-decoration:none; }
img { max-width:100%; display:block; }

.container { width:100%; max-width:var(--maxw); margin:0 auto; padding:0 18px; }

/* ---- top brand bar ---- */
.brand {
  position:sticky; top:0; z-index:20;
  background:rgba(255,255,255,.85); backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--slate-200);
}
.brand__inner { display:flex; align-items:center; gap:12px; height:64px; flex-wrap:nowrap; }
.brand__logo { height:40px; width:auto; flex:0 0 auto; }
.brand__name { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.05rem; color:var(--green-800); margin:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.brand__spacer { flex:1 1 auto; }
.brand__user { color:var(--slate-600); font-size:.9rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:220px; flex:0 1 auto; }
.brand__logout { flex:0 0 auto; }
.brand__logout .icon { display:none; }         /* desktop: text label only */

/* ---- hero (layered, with depth) ---- */
.hero {
  background:
    radial-gradient(120% 150% at 0% 0%, rgba(143,224,160,.5), transparent 46%),
    radial-gradient(90% 120% at 100% 100%, rgba(244,183,64,.26), transparent 52%),
    linear-gradient(135deg, var(--forest), var(--leaf) 66%, #33c07a);
  color:#fff; border-radius:24px; padding:30px 30px;
  box-shadow:0 18px 40px rgba(6,78,59,.22); margin:22px 0; position:relative; overflow:hidden;
}
.hero::before { content:""; position:absolute; right:-70px; top:-90px; width:280px; height:280px;
  background:radial-gradient(circle, rgba(255,255,255,.22), transparent 70%); border-radius:50%; }
.hero::after { content:""; position:absolute; right:26px; bottom:-40px; width:130px; height:130px; opacity:.5;
  border:2px solid rgba(255,255,255,.35); border-radius:50%; }
.hero__eyebrow { position:relative; z-index:1; display:inline-flex; align-items:center; gap:7px;
  background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.24); backdrop-filter:blur(4px);
  padding:5px 13px; border-radius:999px; font-size:.82rem; font-weight:600; margin-bottom:13px; }
.hero__eyebrow .icon { width:15px; height:15px; }
.hero h1 { position:relative; z-index:1; margin:0 0 5px; font-size:1.6rem; letter-spacing:-.3px; }
.hero p { position:relative; z-index:1; margin:0; opacity:.94; max-width:52ch; }

/* ---- cards & grid ---- */
.grid { display:grid; gap:16px; }
.grid--2 { grid-template-columns:repeat(2, 1fr); }
.card {
  background:var(--white); border:1px solid var(--slate-200);
  border-radius:var(--radius); box-shadow:var(--shadow-sm); padding:20px;
  transition:transform .18s ease, box-shadow .18s ease;
}
a.card:hover, .card--link:hover { transform:translateY(-3px); box-shadow:var(--shadow-lg); }

/* ---- day cards (premium, with progress ring) ---- */
.day-card { display:flex; align-items:center; gap:20px; padding:22px 24px; }
.day-card__ring { position:relative; width:66px; height:66px; flex:0 0 auto; }
.day-card__ring svg { width:66px; height:66px; transform:rotate(-90deg); }
.day-card__ring .track { stroke:var(--slate-200); }
.day-card__ring .bar { stroke:url(#dcgrad); stroke-linecap:round; transition:stroke-dashoffset .5s ease; }
.day-card__ring-label { position:absolute; inset:0; display:grid; place-items:center; font-family:'Prompt',sans-serif; font-weight:700; font-size:.82rem; color:var(--forest); }
.day-card__main { flex:1; min-width:0; }
.day-card__badge { display:inline-flex; align-items:center; gap:6px; background:var(--green-100); color:var(--green-800);
  font-family:'Prompt',sans-serif; font-weight:600; border-radius:999px; padding:4px 12px; font-size:.8rem; margin-bottom:8px; }
.day-card__badge .icon { width:14px; height:14px; }
.day-card__date { display:block; font-family:'Prompt',sans-serif; font-weight:600; font-size:1.3rem; color:var(--ink); line-height:1.2; }
.day-card__progress { color:var(--slate-600); font-size:.88rem; margin-top:3px; }
.day-card__go { flex:0 0 auto; width:40px; height:40px; border-radius:50%; background:var(--green-50); color:var(--forest);
  display:grid; place-items:center; transition:background .18s, transform .18s; }
.day-card:hover .day-card__go { background:var(--green-600); color:#fff; transform:translateX(3px); }
.progress { height:8px; background:var(--slate-200); border-radius:999px; overflow:hidden; }
.progress__bar { height:100%; background:linear-gradient(90deg,var(--green-600),var(--green-500)); border-radius:999px; }

/* ---- pills / status ---- */
.pill { display:inline-flex; align-items:center; gap:6px; border-radius:999px; padding:5px 12px; font-size:.82rem; font-weight:600; white-space:nowrap; }
.pill--done { background:var(--green-100); color:var(--green-800); }
.pill--todo { background:#fff7ed; color:#b45309; }

/* ---- buttons ---- */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:'Prompt',sans-serif; font-weight:600; font-size:1rem;
  border-radius:14px; padding:12px 20px; cursor:pointer; border:1px solid transparent;
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:active { transform:translateY(1px); }
.btn--primary { background:linear-gradient(135deg,var(--green-700),var(--green-600)); color:#fff; box-shadow:var(--shadow-sm); width:100%; }
.btn--primary:hover { box-shadow:var(--shadow-md); }
.btn--ghost { background:#fff; border-color:var(--slate-200); color:var(--green-800); }
.btn--sm { padding:8px 14px; font-size:.9rem; border-radius:10px; }

/* ---- forms ---- */
.field { margin-bottom:16px; }
.field label { display:block; font-weight:600; margin-bottom:6px; color:var(--ink); }
.field input, .field select, .field textarea {
  width:100%; padding:12px 14px; border:1px solid var(--slate-200); border-radius:12px;
  font:inherit; background:#fff; transition:border .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline:none; border-color:var(--green-500); box-shadow:0 0 0 4px var(--green-100);
}

/* ---- video ---- */
.video-frame { position:relative; width:100%; aspect-ratio:16/9; border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-lg); background:#000; }
.video-frame iframe { position:absolute; inset:0; width:100%; height:100%; border:0; }

/* ---- flash ---- */
.flash { border-radius:12px; padding:12px 16px; margin:16px 0; font-weight:600; transition:opacity .5s; }
.flash--success { background:var(--green-100); color:var(--green-800); }
.flash--error { background:#fee2e2; color:#b91c1c; }
.flash--info { background:#e0f2fe; color:#075985; }

/* ---- auth card (centered — used by admin login / 404) ---- */
.auth-wrap { min-height:100vh; display:grid; place-items:center; padding:24px; }
.auth-card { width:100%; max-width:400px; background:var(--cream); border-radius:24px; box-shadow:var(--shadow-lg); padding:32px 28px; }
.auth-card__logo { height:72px; margin:0 auto 14px; }
.auth-card__title { text-align:center; color:var(--green-800); margin:0 0 4px; }
.auth-card__subtitle { text-align:center; color:var(--slate-600); margin:0 0 22px; font-size:.92rem; }

/* ---- split-screen auth (student login) ---- */
.auth { min-height:100vh; display:grid; place-items:center; padding:24px; }
.auth__card {
  width:100%; max-width:940px; background:var(--cream);
  border-radius:28px; overflow:hidden; box-shadow:var(--shadow-lg);
  display:grid; grid-template-columns:1.05fr 1fr;
}
.auth__panel {
  position:relative; overflow:hidden; color:#fff; padding:42px 38px; min-height:552px;
  display:flex; flex-direction:column; justify-content:space-between; gap:26px;
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(143,224,160,.55), transparent 52%),
    radial-gradient(110% 120% at 100% 100%, rgba(244,183,64,.34), transparent 55%),
    linear-gradient(150deg, var(--forest), var(--leaf) 72%, #33c07a);
}
.auth__panel::before { content:""; position:absolute; width:340px; height:340px; right:-96px; top:-116px;
  background:radial-gradient(circle, rgba(255,255,255,.22), transparent 70%); border-radius:50%; }
.auth__panel::after { content:""; position:absolute; width:250px; height:250px; left:-84px; bottom:-84px;
  background:radial-gradient(circle, rgba(255,255,255,.12), transparent 70%); border-radius:50%; }
.auth__leaf { position:absolute; right:22px; bottom:20px; width:150px; height:150px; opacity:.18; z-index:0; }
.auth__brand { position:relative; z-index:1; display:flex; align-items:center; gap:12px; }
.auth__brand img { height:46px; width:46px; border-radius:13px; background:#fff; padding:5px; box-shadow:0 8px 18px rgba(0,0,0,.16); }
.auth__brand span { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.02rem; letter-spacing:.2px; }
.auth__copy { position:relative; z-index:1; }
.auth__headline { font-family:'Prompt',sans-serif; font-weight:700; font-size:2.3rem; line-height:1.16; margin:0 0 12px; letter-spacing:-.5px; }
.auth__tagline { font-size:1rem; opacity:.94; margin:0; max-width:32ch; }
.auth__pillnote { position:relative; z-index:1; align-self:flex-start; display:inline-flex; align-items:center; gap:8px;
  background:rgba(255,255,255,.16); backdrop-filter:blur(4px); border:1px solid rgba(255,255,255,.25);
  padding:8px 15px; border-radius:999px; font-size:.9rem; font-weight:500; }
.auth__form { padding:48px 44px; display:flex; flex-direction:column; justify-content:center; background:var(--cream); }
.auth__title { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.75rem; color:var(--forest); margin:0 0 6px; }
.auth__subtitle { color:var(--slate-600); margin:0 0 26px; font-size:.96rem; }
.auth__help { margin:22px 0 0; font-size:.85rem; color:var(--slate-400); text-align:center; }
@media (max-width:820px){
  .auth__card { grid-template-columns:1fr; max-width:440px; }
  .auth__panel { min-height:auto; padding:28px 26px; gap:18px; }
  .auth__headline { font-size:1.62rem; }
  .auth__tagline { font-size:.92rem; max-width:none; }
  .auth__leaf { width:104px; height:104px; right:14px; bottom:12px; }
  .auth__form { padding:32px 26px; }
}

/* ---- misc / footer / table ---- */
.section-title { font-family:'Prompt',sans-serif; font-size:1.2rem; margin:22px 0 12px; }
.muted { color:var(--slate-600); }
.footer { text-align:center; color:var(--slate-400); font-size:.85rem; padding:30px 0 24px; }
.check-yes { color:var(--green-600); font-weight:700; }
.check-no { color:var(--slate-400); }
.toolbar { display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin:16px 0; }

/* ---- responsive ---- */
@media (max-width:560px) {
  .grid--2 { grid-template-columns:1fr; }
  .hero h1 { font-size:1.3rem; }
  .brand__inner { gap:9px; height:56px; }
  .brand__logo { height:34px; }
  .brand__name { font-size:1rem; }
  .brand__name-prefix { display:none; }        /* show just "ใบบุญลำพูน" */
  .brand__user { display:none; }               /* name is already in the page hero */
  .brand__logout { width:40px; height:40px; padding:0; display:inline-grid; place-items:center; border-radius:11px; }
  .brand__logout .icon { display:block; }
  .brand__logout-text { display:none; }        /* icon-only logout on mobile */
}

/* ============================================================
   ADMIN DASHBOARD — data-dense, professional back-office
   ============================================================ */
.icon { width:20px; height:20px; flex:0 0 auto; }
.icon--sm { width:16px; height:16px; }

/* ---- shell: sidebar + main ---- */
.admin-layout { display:grid; grid-template-columns:250px 1fr; min-height:100vh; }
.admin-sidebar {
  background:#fff; border-right:1px solid var(--slate-200);
  display:flex; flex-direction:column; gap:6px; padding:20px 16px;
  position:sticky; top:0; height:100vh;
}
.admin-brand { display:flex; align-items:center; gap:11px; padding:6px 8px 16px; border-bottom:1px solid var(--slate-200); margin-bottom:10px; }
.admin-brand img { height:40px; width:40px; border-radius:11px; background:var(--green-50); padding:3px; }
.admin-brand b { font-family:'Prompt',sans-serif; font-weight:600; font-size:.98rem; color:var(--forest); line-height:1.2; }
.admin-brand span { display:block; font-size:.75rem; color:var(--slate-400); font-weight:400; }
.admin-nav { display:flex; flex-direction:column; gap:3px; flex:1; }
.admin-nav a {
  display:flex; align-items:center; gap:11px; padding:10px 12px; border-radius:11px;
  color:var(--slate-600); font-weight:500; font-size:.95rem; transition:background .15s, color .15s;
}
.admin-nav a:hover { background:var(--green-50); color:var(--forest); }
.admin-nav a.is-active { background:var(--green-100); color:var(--forest); font-weight:600; }
.admin-nav a.is-active .icon { color:var(--leaf); }
.admin-nav__foot { margin-top:auto; padding-top:10px; border-top:1px solid var(--slate-200); }
.admin-nav__foot a { color:var(--slate-600); }
.admin-nav__foot a:hover { background:#fef2f2; color:#b91c1c; }

.admin-main { padding:28px 32px; min-width:0; }

/* ---- page header ---- */
.page-head { display:flex; align-items:flex-end; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-bottom:22px; }
.page-head h1 { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.5rem; margin:0; color:var(--ink); }
.page-head p { margin:4px 0 0; color:var(--slate-600); font-size:.92rem; }
.page-head__actions { display:flex; gap:10px; flex-wrap:wrap; }

/* ---- KPI stat cards ---- */
.stat-cards { display:grid; grid-template-columns:repeat(auto-fit, minmax(180px, 1fr)); gap:16px; margin-bottom:24px; }
.stat-card { background:#fff; border:1px solid var(--slate-200); border-radius:16px; padding:18px 20px; display:flex; align-items:center; gap:14px; box-shadow:var(--shadow-sm); }
.stat-card__icon { width:46px; height:46px; border-radius:13px; display:grid; place-items:center; background:var(--green-100); color:var(--forest); flex:0 0 auto; }
.stat-card__icon .icon { width:24px; height:24px; }
.stat-card__num { font-family:'Prompt',sans-serif; font-weight:700; font-size:1.7rem; line-height:1.1; color:var(--ink); }
.stat-card__label { font-size:.85rem; color:var(--slate-600); }

/* ---- panel wrapper ---- */
.panel { background:#fff; border:1px solid var(--slate-200); border-radius:16px; box-shadow:var(--shadow-sm); overflow:hidden; margin-bottom:20px; }
.panel__head { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:14px 18px; border-bottom:1px solid var(--slate-200); background:var(--green-50); }
.panel__head h2, .panel__head h3 { font-family:'Prompt',sans-serif; margin:0; font-size:1.05rem; color:var(--forest); display:flex; align-items:center; gap:9px; }
.panel__body { padding:18px; }

/* ---- dense data table ---- */
.dtable { width:100%; border-collapse:collapse; font-size:.92rem; }
.dtable th, .dtable td { padding:11px 14px; text-align:left; border-bottom:1px solid var(--slate-200); vertical-align:middle; }
.dtable thead th { background:#fbfdfb; color:var(--slate-600); font-family:'Prompt',sans-serif; font-weight:600; font-size:.82rem; text-transform:none; white-space:nowrap; position:sticky; top:0; }
.dtable tbody tr { transition:background .12s; }
.dtable tbody tr:hover { background:var(--green-50); }
.dtable tbody tr:last-child td { border-bottom:0; }
.dtable .num { text-align:center; font-variant-numeric:tabular-nums; }
.dtable__scroll { overflow-x:auto; }
.subject-cell { font-weight:600; color:var(--ink); }
.muted-cell { color:var(--slate-600); }

/* ---- badges ---- */
.badge { display:inline-flex; align-items:center; gap:5px; border-radius:999px; padding:3px 10px; font-size:.78rem; font-weight:600; white-space:nowrap; line-height:1.4; }
.badge--ok { background:var(--green-100); color:var(--forest); }
.badge--warn { background:#fff7ed; color:#b45309; }
.badge--muted { background:var(--slate-200); color:var(--slate-600); }
.badge--info { background:#e0f2fe; color:#075985; }

/* ---- day group header meta ---- */
.day-title { display:flex; align-items:center; gap:9px; }
.day-title .icon { color:var(--leaf); }

/* ---- icon buttons (row actions) ---- */
.act-group { display:inline-flex; gap:6px; }
.icon-btn {
  width:34px; height:34px; border-radius:9px; display:inline-grid; place-items:center; cursor:pointer;
  border:1px solid var(--slate-200); background:#fff; color:var(--slate-600); transition:all .13s;
}
.icon-btn:hover { border-color:var(--leaf); color:var(--forest); background:var(--green-50); }
.icon-btn--danger:hover { border-color:#fca5a5; color:#b91c1c; background:#fef2f2; }
.icon-btn .icon { width:17px; height:17px; }

/* ---- buttons: danger + icon-in-button ---- */
.btn .icon { width:18px; height:18px; }
.btn--danger { background:#fff; border-color:#fecaca; color:#b91c1c; }
.btn--danger:hover { background:#fef2f2; }
.btn--auto { width:auto; }

/* ---- empty state ---- */
.empty { text-align:center; padding:34px 20px; color:var(--slate-400); }
.empty .icon { width:34px; height:34px; margin:0 auto 10px; opacity:.6; }

/* ---- modal ---- */
.modal { position:fixed; inset:0; z-index:100; display:none; }
.modal.is-open { display:block; }
.modal__scrim { position:absolute; inset:0; background:rgba(10,36,25,.5); backdrop-filter:blur(2px); animation:fade .18s ease; }
.modal__dialog {
  position:relative; z-index:1; background:#fff; width:calc(100% - 32px); max-width:560px;
  margin:5vh auto; max-height:90vh; overflow:auto; border-radius:20px; box-shadow:var(--shadow-lg);
  animation:pop .2s cubic-bezier(.16,1,.3,1);
}
.modal__head { display:flex; align-items:center; justify-content:space-between; padding:18px 22px; border-bottom:1px solid var(--slate-200); position:sticky; top:0; background:#fff; }
.modal__head h3 { font-family:'Prompt',sans-serif; margin:0; font-size:1.2rem; color:var(--forest); }
.modal__close { width:36px; height:36px; border-radius:10px; border:0; background:var(--slate-200); color:var(--slate-600); cursor:pointer; display:grid; place-items:center; transition:all .13s; }
.modal__close:hover { background:#fecaca; color:#b91c1c; }
.modal__body { padding:22px; }
.modal__foot { display:flex; gap:10px; justify-content:flex-end; padding:16px 22px; border-top:1px solid var(--slate-200); position:sticky; bottom:0; background:#fff; }
@keyframes fade { from{opacity:0} to{opacity:1} }
@keyframes pop { from{opacity:0; transform:translateY(12px) scale(.98)} to{opacity:1; transform:none} }

/* ---- field row (2 col in forms/modals) ---- */
.field-row { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.help-line { font-size:.85rem; color:var(--slate-600); margin:0 0 14px; }
.help-line code { background:var(--green-50); border:1px solid var(--slate-200); border-radius:6px; padding:1px 6px; font-size:.85em; }

/* ---- admin responsive: sidebar -> top bar ---- */
@media (max-width:860px){
  .admin-layout { grid-template-columns:1fr; }
  .admin-sidebar { position:static; height:auto; flex-direction:row; align-items:center; gap:4px; padding:10px 14px; overflow-x:auto; }
  .admin-brand { border-bottom:0; margin-bottom:0; padding:0 10px 0 0; border-right:1px solid var(--slate-200); flex:0 0 auto; }
  .admin-brand span { display:none; }
  .admin-nav { flex-direction:row; flex:1; gap:2px; }
  .admin-nav a span { display:none; }
  .admin-nav a { padding:9px 11px; }
  .admin-nav__foot { margin-top:0; padding-top:0; border-top:0; margin-left:auto; }
  .admin-main { padding:20px 16px; }
  .field-row { grid-template-columns:1fr; }
}

/* ---- modal sub-sections (attachments) ---- */
.modal-section { margin-top:20px; padding-top:16px; border-top:1px dashed var(--slate-200); }
.modal-section__title { font-family:'Prompt',sans-serif; font-weight:600; font-size:.95rem; color:var(--slate-600); margin:0 0 10px; display:flex; align-items:center; gap:8px; }
.att-row { display:flex; align-items:center; gap:10px; padding:8px 10px; border:1px solid var(--slate-200); border-radius:10px; margin-bottom:8px; font-size:.9rem; }
.att-row .icon { color:var(--slate-400); }
.att-row__name { flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.att-upload { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-top:8px; }
.att-upload input[type=file] { flex:1; min-width:160px; font-size:.85rem; }
.inline-form { display:inline; }
.cell-actions { white-space:nowrap; }
.period-chip { display:inline-grid; place-items:center; width:30px; height:30px; border-radius:9px; background:linear-gradient(135deg,var(--green-700),var(--green-500)); color:#fff; font-family:'Prompt',sans-serif; font-weight:600; font-size:.9rem; }

/* ============================================================
   STUDENT — premium course-style lesson cards (with thumbnails)
   ============================================================ */
.lesson-list { display:grid; gap:16px; }
.lesson-card {
  display:grid; grid-template-columns:230px 1fr; background:#fff;
  border:1px solid var(--slate-200); border-radius:20px; overflow:hidden;
  box-shadow:var(--shadow-sm); transition:transform .18s ease, box-shadow .18s ease;
}
.lesson-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-lg); }
.lesson-card__thumb { position:relative; aspect-ratio:16/9; background:linear-gradient(135deg,var(--green-800),var(--forest)); overflow:hidden; }
.lesson-card__thumb img { width:100%; height:100%; object-fit:cover; display:block; }
.lesson-card__play { position:absolute; inset:0; display:grid; place-items:center; background:rgba(10,36,25,.28); transition:background .18s; }
.lesson-card:hover .lesson-card__play { background:rgba(10,36,25,.15); }
.lesson-card__play span { width:52px; height:52px; border-radius:50%; background:rgba(255,255,255,.92); color:var(--forest); display:grid; place-items:center; box-shadow:0 6px 18px rgba(0,0,0,.25); }
.lesson-card__play .icon { width:22px; height:22px; margin-left:3px; fill:currentColor; stroke:none; }
.lesson-card__period { position:absolute; top:10px; left:10px; background:rgba(10,36,25,.72); color:#fff; font-family:'Prompt',sans-serif; font-weight:600; font-size:.8rem; padding:4px 11px; border-radius:999px; backdrop-filter:blur(4px); }
.lesson-card__flag { position:absolute; top:10px; right:10px; width:28px; height:28px; border-radius:50%; display:grid; place-items:center; }
.lesson-card__flag--done { background:var(--green-500); color:#fff; }
.lesson-card__body { padding:16px 20px; display:flex; flex-direction:column; gap:5px; justify-content:center; min-width:0; }
.lesson-card__subject { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.15rem; color:var(--ink); }
.lesson-card__meta { color:var(--slate-600); font-size:.9rem; display:flex; align-items:center; gap:7px; flex-wrap:wrap; }
.lesson-card__meta .icon { width:15px; height:15px; color:var(--slate-400); }
.lesson-card__topic { color:var(--slate-600); font-size:.9rem; }
.lesson-card__foot { display:flex; align-items:center; gap:10px; margin-top:6px; }
.lesson-card__cta { display:inline-flex; align-items:center; gap:6px; color:var(--forest); font-weight:600; font-size:.9rem; }
.lesson-card__cta .icon { width:16px; height:16px; }

@media (max-width:640px){
  .lesson-card { grid-template-columns:1fr; }
  .lesson-card__thumb { aspect-ratio:16/9; }
}

/* ---- watch page: teacher note callout + nav ---- */
.field textarea { resize:vertical; min-height:90px; line-height:1.6; }
.watch-nav { margin:18px 0 14px; }
.teacher-note { margin-top:18px; background:var(--green-50); border:1px solid var(--green-100); border-left:4px solid var(--leaf); border-radius:14px; padding:16px 18px; }
.teacher-note__title { display:flex; align-items:center; gap:9px; font-family:'Prompt',sans-serif; font-weight:600; font-size:1rem; color:var(--forest); margin:0 0 8px; }
.teacher-note__title .icon { width:18px; height:18px; }
.teacher-note__body { color:var(--ink); font-size:.96rem; line-height:1.7; white-space:pre-line; }
.watch-foot { display:flex; align-items:center; gap:12px; margin:20px 0; }
.watch-foot__next { margin-left:auto; }

/* ---- period badge (neutral, distinct from watched-status pills) ---- */
.pill--period { background:var(--green-100); color:var(--forest); }
/* ---- video fallback link ---- */
.video-fallback { text-align:center; color:var(--slate-600); font-size:.9rem; margin:12px 0 0; }
.video-fallback a { display:inline-flex; align-items:center; gap:5px; font-weight:600; margin-left:4px; }

/* ============================================================
   ACCESSIBILITY + CONTRAST + POLISH (audit fixes)
   ============================================================ */
/* informational text off the too-light slate-400 (was <4.5:1) */
.footer, .auth__help, .empty { color:var(--slate-600); }
.empty .icon { opacity:.7; }
/* stronger white-on-green contrast for primary buttons + the "watched" check */
.btn--primary { background:linear-gradient(135deg, var(--forest), var(--green-700)); }
.check-yes { color:var(--green-700); }
/* larger, easier touch targets */
.icon-btn { width:40px; height:40px; }
.icon-btn .icon { width:18px; height:18px; }
.act-group { gap:9px; }
.modal__close { width:40px; height:40px; }
/* day-card grid self-adjusts instead of a hard 2-column lock */
.grid--2 { grid-template-columns:repeat(auto-fit, minmax(290px, 1fr)); }
/* visible keyboard focus everywhere (extends the existing input focus ring) */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible,
.btn:focus-visible, .icon-btn:focus-visible, .modal__close:focus-visible,
.admin-nav a:focus-visible, .card:focus-visible, .day-card:focus-visible, .lesson-card:focus-visible {
  outline:3px solid var(--green-500); outline-offset:2px;
}
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline:none; }
/* respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration:.001ms !important; animation-iteration-count:1 !important;
    transition-duration:.001ms !important; scroll-behavior:auto !important;
  }
  a.card:hover, .card--link:hover, .lesson-card:hover, .day-card:hover .day-card__go { transform:none !important; }
}

/* ---- "clip coming soon" (period created, video not uploaded yet) ---- */
.lesson-card--soon .lesson-card__thumb { background:linear-gradient(135deg, var(--slate-600), #2f3e37); }
.lesson-card__soon { position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:6px; color:#fff; font-family:'Prompt',sans-serif; font-weight:600; font-size:.95rem; }
.lesson-card__soon .icon { width:26px; height:26px; opacity:.9; }
.video-frame--soon { display:grid; place-items:center; background:linear-gradient(135deg, var(--green-900), var(--forest)); }
.video-soon { text-align:center; color:#fff; padding:20px; }
.video-soon .icon { width:42px; height:42px; margin:0 auto 12px; opacity:.9; }
.video-soon__title { font-family:'Prompt',sans-serif; font-weight:600; font-size:1.25rem; }
.video-soon__sub { opacity:.85; font-size:.92rem; margin-top:4px; }