:root {
  --ink: #1c1b1a;
  --ink-soft: #5f5b57;
  --line: #e2ded8;
  --paper: #fbfaf8;
  --card: #ffffff;
  --accent: #7a4b28;
  --accent-soft: #f3ece5;
  --ok: #2f6f4f;
  --ok-soft: #e6f2ec;
  --warn: #9a5b12;
  --warn-soft: #fbf0e0;
  --danger: #9b3232;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 32px 20px 80px; }
.hidden { display: none !important; }

/* ---------------------------------------------------------- typography */
h1 { font-size: 28px; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 18px 0 8px; }
.sub { color: var(--ink-soft); margin: 0 0 24px; }
.fineprint { color: var(--ink-soft); font-size: 13px; }
.small { font-size: 13px; }
.muted { color: var(--ink-soft); }
.empty { color: var(--ink-soft); font-style: italic; }
code { background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; font-size: 13px; }

.page-head { margin-bottom: 28px; }
.page-foot { margin-top: 40px; color: var(--ink-soft); font-size: 14px; }

/* ---------------------------------------------------------- structure */
.step, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 20px;
}

.step-n {
  display: inline-grid; place-items: center;
  width: 24px; height: 24px; margin-right: 8px;
  background: var(--accent); color: #fff;
  border-radius: 50%; font-size: 13px; font-weight: 600;
}

/* ---------------------------------------------------------- lesson cards */
.cards { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  display: flex; flex-direction: column; gap: 4px; text-align: left;
  padding: 16px; background: var(--card); cursor: pointer;
  border: 1.5px solid var(--line); border-radius: var(--radius);
  font: inherit; color: inherit; transition: border-color .12s, background .12s;
}
.card:hover { border-color: var(--accent); }
.card--selected { border-color: var(--accent); background: var(--accent-soft); }
.card-name { font-weight: 600; }
.card-desc { color: var(--ink-soft); font-size: 14px; }
.card-meta { color: var(--accent); font-size: 14px; font-weight: 500; margin-top: 4px; }

/* ---------------------------------------------------------- timezone bar */
.tz-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; margin-bottom: 16px;
  background: var(--accent-soft); border-radius: var(--radius);
}
.tz-bar label { font-size: 14px; font-weight: 500; }
.tz-note { width: 100%; margin: 0; font-size: 13px; color: var(--ink-soft); }

.week-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; font-size: 14px; }

/* ---------------------------------------------------------- slots */
.day { margin-bottom: 20px; }
.day h3 { margin: 0 0 8px; color: var(--ink-soft); font-weight: 600; }
.slot-list { display: flex; flex-wrap: wrap; gap: 8px; }

.slot {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  min-width: 84px; padding: 8px 12px; cursor: pointer;
  background: var(--card); border: 1.5px solid var(--line);
  border-radius: 8px; font: inherit; color: inherit;
}
.slot:hover { border-color: var(--accent); }
.slot--selected { border-color: var(--accent); background: var(--accent); color: #fff; }
.slot-time { font-weight: 600; }
.slot-alt { font-size: 11px; opacity: .7; }

/* ---------------------------------------------------------- forms */
.form, .stack-form { display: flex; flex-direction: column; gap: 14px; }
.form label, .stack-form label { display: flex; flex-direction: column; gap: 5px; font-size: 14px; font-weight: 500; }
.form small, .stack-form small { font-weight: 400; color: var(--ink-soft); font-size: 12px; }

input, select, textarea {
  padding: 9px 11px; font: inherit; color: inherit;
  background: #fff; border: 1px solid var(--line); border-radius: 7px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.row { display: flex; flex-wrap: wrap; gap: 14px; }
.row > label { flex: 1 1 190px; }
.check { flex-direction: row !important; align-items: center; gap: 8px !important; }
.check input { width: auto; }

.inline-form { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 14px 0; }

button.primary, .as-button {
  display: inline-block; padding: 11px 18px; cursor: pointer;
  background: var(--accent); color: #fff; text-decoration: none;
  border: none; border-radius: 8px; font: inherit; font-weight: 600;
}
button.primary:hover, .as-button:hover { filter: brightness(1.08); }
button.primary:disabled { opacity: .55; cursor: progress; }

button.ghost {
  padding: 6px 11px; cursor: pointer; background: transparent;
  border: 1px solid var(--line); border-radius: 7px; font: inherit; font-size: 13px;
}
button.ghost:hover { border-color: var(--accent); }
button.ghost.danger { color: var(--danger); }

/* ---------------------------------------------------------- confirm page */
.when-primary { font-size: 22px; font-weight: 600; margin: 6px 0; }
.when-secondary { color: var(--ink-soft); margin: 0 0 10px; }
.amount { font-size: 18px; font-weight: 600; color: var(--accent); }
.chosen { padding: 10px 12px; background: var(--accent-soft); border-radius: 8px; font-size: 14px; }

.pay-option { padding: 16px; margin-bottom: 14px; border: 1px solid var(--line); border-radius: var(--radius); }
.pay-option--primary { border-color: var(--accent); border-width: 1.5px; background: #fffdfb; }
.pay-option h3 { margin: 4px 0 6px; font-size: 17px; }
.pay-option .blurb { color: var(--ink-soft); font-size: 14px; margin: 0 0 12px; }

.badge {
  display: inline-block; padding: 2px 8px;
  background: var(--accent); color: #fff;
  border-radius: 999px; font-size: 11px; font-weight: 600; text-transform: uppercase;
}

.bank-details {
  margin: 0 0 10px; padding: 12px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 8px;
  font: 14px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap;
}
.reference-callout { padding: 10px 12px; background: var(--warn-soft); border-radius: 8px; font-size: 14px; margin: 0; }

.status-panel { text-align: center; color: var(--ink-soft); }
.status-panel--paid { background: var(--ok-soft); color: var(--ok); font-weight: 600; }

/* ---------------------------------------------------------- admin */
.admin-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; }
.admin-nav { display: flex; gap: 14px; font-size: 14px; }
.admin-nav a { color: var(--accent); text-decoration: none; }
.admin-nav a:hover { text-decoration: underline; }
.admin-nav .logout { color: var(--ink-soft); }

.week-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; margin-bottom: 8px; }
.week-col { padding: 10px 8px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; min-height: 84px; }
.week-col h3 { margin: 0 0 8px; font-size: 12px; text-transform: uppercase; color: var(--ink-soft); }
.chip-form { display: inline; }
.chip { display: inline-flex; align-items: center; gap: 5px; padding: 3px 7px; margin-bottom: 5px; background: var(--accent-soft); border-radius: 6px; font-size: 12px; }
.chip button { background: none; border: none; cursor: pointer; color: var(--ink-soft); font-size: 14px; padding: 0; line-height: 1; }

.table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 14px; }
.table th { text-align: left; padding: 8px 10px; border-bottom: 2px solid var(--line); font-size: 12px; text-transform: uppercase; color: var(--ink-soft); }
.table td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.row--unpaid { background: var(--warn-soft); }
.actions { display: flex; gap: 6px; }

.job-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 12px 0; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.tag--paid { background: var(--ok-soft); color: var(--ok); }
.tag--unpaid { background: var(--warn-soft); color: var(--warn); }
.tag--intl { background: var(--accent-soft); color: var(--accent); }
.tag--off { background: #eee; color: var(--ink-soft); }

.login-box { max-width: 340px; margin: 80px auto; padding: 26px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }

/* ---------------------------------------------------------- banners */
.banner { padding: 14px 16px; margin-bottom: 20px; border-radius: var(--radius); font-size: 14px; line-height: 1.6; }
.banner--bad { background: #fbe9e9; border: 1px solid #e8bcbc; color: var(--danger); }
.banner--warn { background: var(--warn-soft); border: 1px solid #e8d0a8; color: var(--warn); }
.banner code { background: rgba(0, 0, 0, .06); }

/* ---------------------------------------------------------- flashes */
.flashes { margin-bottom: 18px; }
.flash { padding: 10px 14px; margin-bottom: 8px; border-radius: 8px; font-size: 14px; }
.flash--ok { background: var(--ok-soft); color: var(--ok); }
.flash--error { background: #fbe9e9; color: var(--danger); }
.error { color: var(--danger); font-size: 14px; }

@media (max-width: 640px) {
  .week-grid { grid-template-columns: repeat(2, 1fr); }
  .table { font-size: 13px; }
}