/* Shared styles for the courses page, student portal and admin dashboard (loads after /styles.css) */
body.app { background: var(--bg-soft); min-height: 100vh; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
.hidden { display: none !important; }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.spread { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.stack { display: grid; gap: 16px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); min-width: 0; }
.panel h2 { font-size: 1.25rem; }
.panel h3 { font-size: 1.05rem; }
.page-title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; }

/* chips */
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: .76rem; font-weight: 800; padding: 4px 10px; border-radius: 999px; letter-spacing: .02em; white-space: nowrap; background: var(--bg-soft); color: var(--ink-2); border: 1px solid var(--line); }
.chip.green, .chip.active, .chip.registered, .chip.open, .chip.sent, .chip.student { background: var(--green-50); color: var(--green); border-color: #c9ecd7; }
.chip.blue, .chip.completed, .chip.lead, .chip.sending { background: var(--blue-50); color: var(--blue-600); border-color: var(--blue-100); }
.chip.orange, .chip.waitlist, .chip.draft, .chip.needs-reply { background: var(--orange-50); color: #a65300; border-color: #ffd9ad; }
.chip.grey, .chip.cancelled, .chip.closed, .chip.archived, .chip.inactive { background: #f1f3f7; color: #5b6b86; }
.chip.red, .chip.failed { background: #fdecec; color: #b53030; border-color: #f6caca; }

/* forms */
.field { display: grid; gap: 6px; font-size: .88rem; font-weight: 700; color: var(--ink-2); min-width: 0; }
.field input, .field select, .field textarea, .input { width: 100%; min-height: 44px; background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 10px 12px; color: var(--ink); font: inherit; font-size: .98rem; font-weight: 500; transition: border-color .2s, box-shadow .2s; }
.field textarea { min-height: 120px; resize: vertical; line-height: 1.5; }
.field input:focus, .field select:focus, .field textarea:focus, .input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(22, 104, 209, .14); }
.field .hint { font-weight: 500; color: var(--muted); font-size: .8rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.check { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--ink-2); cursor: pointer; }
.check input { width: 20px; height: 20px; accent-color: var(--blue); }
.msg { font-size: .92rem; font-weight: 600; min-height: 1.3em; }
.msg.ok { color: var(--green); } .msg.err { color: var(--red); }
.btn-danger { background: #fff; color: #b53030; border-color: #f2c4c4; }
.btn-danger:hover { background: #fdecec; }
.btn-link { background: none; border: 0; color: var(--blue); font-weight: 700; cursor: pointer; padding: 6px 4px; min-height: 36px; }

/* tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
table.data { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.data th { text-align: left; font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); background: #fafcff; padding: 12px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.data td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.data tr:last-child td { border-bottom: 0; }
table.data tr.click { cursor: pointer; }
table.data tr.click:hover td { background: #f7faff; }
table.data .num { text-align: right; font-variant-numeric: tabular-nums; }
.empty { padding: 36px 16px; text-align: center; color: var(--muted); }

/* modal */
.modal-back { position: fixed; inset: 0; background: rgba(15, 30, 58, .45); display: grid; place-items: center; padding: 16px; z-index: 100; }
.modal { background: #fff; border-radius: 20px; width: min(560px, 100%); max-height: calc(100vh - 32px); overflow: auto; box-shadow: 0 30px 80px -20px rgba(15, 30, 58, .5); }
.modal header { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 20px 22px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: #fff; z-index: 1; }
.modal header h2 { font-size: 1.2rem; }
.modal .body { padding: 20px 22px; display: grid; gap: 14px; }
.modal footer { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 22px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.x { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line); background: #fff; cursor: pointer; font-size: 1.3rem; line-height: 1; }

/* toast */
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 12px; font-weight: 600; z-index: 200; box-shadow: var(--shadow); max-width: calc(100% - 32px); }

/* ---------- Courses page ---------- */
.catalog { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.course-card { display: flex; flex-direction: column; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
.course-card .price { font-size: 1.6rem; font-weight: 800; }
.course-card .price small { font-size: .85rem; color: var(--muted); font-weight: 600; }
.course-card p { flex: 1; }
.course-card .when { font-weight: 700; color: var(--blue-600); font-size: .9rem; }

/* ---------- Portal ---------- */
.portal-wrap { width: min(1080px, 100% - 32px); margin: 32px auto 64px; display: grid; gap: 20px; }
.login-card { width: min(440px, 100% - 32px); margin: 8vh auto; }
.hello { background: linear-gradient(135deg, #1668d1, #3d93f0); color: #fff; border-radius: 22px; padding: 28px; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.hello h1 { color: #fff; font-size: clamp(1.4rem, 3vw, 1.9rem); }
.hello p { color: #e3efff; }
.portal-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; align-items: start; }
.my-course { display: grid; gap: 6px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.my-course + .my-course { margin-top: 12px; }

/* ---------- Admin ---------- */
.admin { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.side { background: #0f1e3a; color: #c9d5ea; padding: 20px 14px; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 6px; }
.side .brand { padding: 4px 8px 18px; }
.side .brand-text { color: #fff; }
.side a.nav-item { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 10px; color: #c9d5ea; font-weight: 600; font-size: .95rem; min-height: 44px; }
.side a.nav-item svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.side a.nav-item:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.side a.nav-item.on { background: rgba(255, 154, 46, .16); color: #fff; }
.side a.nav-item .badge-n { margin-left: auto; background: var(--orange); color: #1d1206; font-size: .72rem; font-weight: 800; padding: 2px 8px; border-radius: 999px; }
.side .foot { margin-top: auto; padding: 12px 8px 0; border-top: 1px solid rgba(255, 255, 255, .08); font-size: .82rem; display: grid; gap: 8px; }
.side .foot button { background: none; border: 1px solid rgba(255, 255, 255, .18); color: #c9d5ea; border-radius: 10px; padding: 8px 10px; cursor: pointer; font-weight: 600; min-height: 40px; }
.main { padding: 28px clamp(16px, 3vw, 36px) 64px; min-width: 0; display: grid; gap: 20px; align-content: start; }
.topbar { display: none; }
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.kpi { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.kpi small { display: block; color: var(--muted); font-weight: 700; font-size: .78rem; letter-spacing: .05em; text-transform: uppercase; }
.kpi b { display: block; font-size: 1.9rem; font-weight: 800; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; margin-top: 4px; }
.kpi span { font-size: .85rem; color: var(--muted); }
.two-col { display: grid; grid-template-columns: 1.3fr 1fr; gap: 20px; align-items: start; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 120px; padding-top: 8px; }
.bars div { flex: 1; background: var(--blue-100); border-radius: 4px 4px 0 0; min-height: 3px; position: relative; }
.bars div:hover { background: var(--blue); }
.feed { list-style: none; display: grid; gap: 2px; }
.feed li { display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .9rem; }
.feed li:last-child { border-bottom: 0; }
.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.filters .input { width: auto; min-width: 140px; }
.filters .search { flex: 1; min-width: 200px; }
.pager { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.detail-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 20px; align-items: start; }
.timeline-list { list-style: none; display: grid; gap: 0; max-height: 520px; overflow: auto; }
.timeline-list li { padding: 10px 0 10px 18px; border-left: 2px solid var(--line); position: relative; font-size: .9rem; }
.timeline-list li::before { content: ''; position: absolute; left: -6px; top: 15px; width: 10px; height: 10px; border-radius: 50%; background: var(--blue-100); border: 2px solid #fff; }
.timeline-list li.note::before { background: var(--orange); }
.timeline-list time { display: block; font-size: .76rem; color: var(--muted); }
.preview-frame { width: 100%; height: 520px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.code { font-family: ui-monospace, Menlo, monospace; font-size: .85rem; background: var(--bg-soft); padding: 10px 12px; border-radius: 10px; word-break: break-all; }

@media (max-width: 1100px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .two-col, .detail-grid, .portal-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .admin { grid-template-columns: 1fr; }
  .side { position: fixed; inset: 0 auto 0 0; width: 260px; z-index: 90; transform: translateX(-100%); transition: transform .25s var(--ease); }
  .side.open { transform: none; box-shadow: 0 0 0 100vmax rgba(15, 30, 58, .4); }
  .topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px; }
  .main { padding-top: 20px; }
}
@media (max-width: 640px) {
  .grid2, .grid3 { grid-template-columns: 1fr; }
  .panel { padding: 18px; }
  .kpi b { font-size: 1.5rem; }
  .filters .input, .filters .search { width: 100%; min-width: 0; flex: 1 1 100%; }
  table.data .hide-sm { display: none; }
  .hello { padding: 22px; }
  .modal footer .btn { flex: 1; }
}