/* ============================================================
   learnfromCher.com — design system
   Colours are exposed ONLY as CSS variables (design tokens).
   Mobile-first. Fonts: DM Sans (UI), DM Mono (code/emails/formulas).
   ============================================================ */

:root {
  --teal: #1A7A8A;
  --teal-dk: #0F5A67;
  --teal-lt: #EBF6F8;
  --dark: #1A2E35;
  --coral: #E8604C;
  --green: #276749;
  --red: #C53030;

  --white: #ffffff;
  --ink: #1A2E35;
  --muted: #55666d;
  --line: #d7e3e6;

  --font-ui: 'DM Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --maxw: 1080px;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(26, 46, 53, 0.08);
  --shadow-lg: 0 8px 28px rgba(26, 46, 53, 0.12);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  font-size: 17px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3 { line-height: 1.2; color: var(--dark); font-weight: 700; }
h1 { font-size: 2rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.5rem; margin: 0 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }
p { margin: 0 0 1rem; }
a { color: var(--teal-dk); }
code, kbd, .mono { font-family: var(--font-mono); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--dark);
  border-bottom: 3px solid var(--teal);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}
.logo {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.logo .lf { color: var(--teal); }
.logo .ch { color: var(--coral); }
.logo .co { color: var(--teal); }

.nav { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.nav a {
  color: var(--teal-lt);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.95rem;
}
.nav a:hover { background: rgba(255, 255, 255, 0.08); color: var(--white); }
.nav a.active { color: var(--white); background: rgba(26, 122, 138, 0.35); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: 0;
  border-radius: 10px;
  padding: 12px 22px;
  transition: transform 0.05s ease, background 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--coral); color: var(--white); }
.btn-primary:hover { background: #d5503d; }
.btn-teal { background: var(--teal); color: var(--white); }
.btn-teal:hover { background: var(--teal-dk); }
.btn-ghost { background: transparent; color: var(--teal-dk); border: 1.5px solid var(--teal); }
.btn-ghost:hover { background: var(--teal-lt); }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- Main ---------- */
main { flex: 1 0 auto; }
.section { padding: 44px 0; }
.section.alt { background: var(--teal-lt); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--dark) 0%, var(--teal-dk) 100%);
  color: var(--white);
  padding: 64px 0;
}
.hero h1 { color: var(--white); font-size: clamp(2rem, 5vw, 3rem); }
.hero .tagline { color: var(--teal-lt); font-size: 1.25rem; margin-bottom: 1.5rem; }
.hero .cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid.cols-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 860px) { .grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card h3 { color: var(--teal-dk); }
.card .pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal-dk);
  background: var(--teal-lt);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 8px;
}

/* ---------- Forms ---------- */
.form { max-width: 420px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.95rem; }
.field input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
}
.field input:focus { outline: 2px solid var(--teal); border-color: var(--teal); }

.notice { padding: 12px 14px; border-radius: 10px; margin: 12px 0; font-size: 0.95rem; }
.notice.error { background: #fdecec; color: var(--red); border: 1px solid #f3bcbc; }
.notice.ok { background: #e9f6ee; color: var(--green); border: 1px solid #b7e0c4; }
.notice.info { background: var(--teal-lt); color: var(--teal-dk); border: 1px solid #c4e5eb; }
.hidden { display: none !important; }

/* ---------- Contact ---------- */
.contact-line { font-family: var(--font-mono); font-size: 1.05rem; }

/* ---------- File list (members) ---------- */
.unit-group { margin-bottom: 28px; }
.unit-group h3 {
  display: inline-block;
  font-family: var(--font-mono);
  background: var(--dark);
  color: var(--white);
  padding: 4px 12px;
  border-radius: 8px;
}
.file-list { list-style: none; padding: 0; margin: 12px 0 0; }
.file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 8px;
  background: var(--white);
}
.file-list .ftype {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--white);
  padding: 2px 8px;
  border-radius: 6px;
}
.file-list .ftype.pdf { background: var(--coral); }
.file-list .ftype.html { background: var(--teal); }
.file-title { flex: 1; font-weight: 600; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark);
  color: var(--teal-lt);
  padding: 22px 0;
  margin-top: 40px;
  font-size: 0.9rem;
}
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.site-footer a { color: var(--teal-lt); }

/* ---------- Login ---------- */
.login-wrap { max-width: 440px; margin: 0 auto; }

/* ---------- Members hub sections ---------- */
.portal-section { padding: 26px 0; border-top: 1px solid var(--line); margin-top: 8px; }
.portal-section:first-of-type { border-top: 0; }

/* Up Next card */
.upnext {
  background: linear-gradient(160deg, var(--teal-dk) 0%, var(--dark) 100%);
  color: var(--white);
  border-radius: var(--radius);
  padding: 22px;
  margin: 18px 0 8px;
  box-shadow: var(--shadow-lg);
}
.upnext h2 { color: var(--white); margin: 6px 0 4px; }
.upnext .pill { background: rgba(255,255,255,0.16); color: var(--teal-lt); }
.upnext-when { color: var(--teal-lt); margin: 0 0 16px; font-size: 1.05rem; }

/* Cal.com inline embed container */
.cal-inline {
  width: 100%;
  min-height: 480px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  margin-bottom: 14px;
}

/* Programme buttons stack full-width on the grid */
#programmeButtons .btn { display: block; text-align: center; }

/* Message Cher — contact channel buttons: side by side, stacked at 390px */
.contact-channels { display: flex; flex-wrap: wrap; gap: 12px; }
.contact-channels .btn { flex: 0 0 auto; text-align: center; }
.contact-reply { margin-top: 12px; }
@media (max-width: 390px) {
  .contact-channels { flex-direction: column; }
  .contact-channels .btn { width: 100%; }
}

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }