/* Shift Calendar — vanilla CSS, light + dark */

:root {
  --bg: #f2f2f7;
  --surface: #ffffff;
  --surface-2: #f7f7fa;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --border: #e0e0e6;
  --accent: #007aff;
  --accent-text: #ffffff;
  --danger: #d70015;
  --success-bg: #e3f8e8;
  --success-text: #0f5b22;
  --error-bg: #fde8ea;
  --error-text: #8a0012;
  --warning-bg: #fff4e0;
  --warning-text: #7a4500;
  --today: #fff8d6;
  --weekend: #f5f5f9;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);

  /* Shift colours (see CLAUDE.md) */
  --shift-D: #007aff;
  --shift-E: #ff9500;
  --shift-N: #5856d6;
  --shift-P: #34c759;
  --shift-U: #af52de;
  --shift-sD: #5ac8fa;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --surface-2: #242427;
    --text: #f2f2f7;
    --muted: #a1a1a8;
    --border: #38383c;
    --accent: #0a84ff;
    --danger: #ff453a;
    --success-bg: #0f3319;
    --success-text: #a6f0b8;
    --error-bg: #3d0f13;
    --error-text: #ffb3b8;
    --warning-bg: #3a2600;
    --warning-text: #ffd699;
    --today: #3a3413;
    --weekend: #202023;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0; }
h2 { font-size: 1.15rem; margin: 0 0 0.75rem; }
h3 { font-size: 1rem; margin: 0.75rem 0 0.25rem; }
p { margin: 0 0 0.75rem; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.nowrap { white-space: nowrap; }
.truncate { max-width: 16rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }

/* Layout */

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}
.brand { font-weight: 700; color: var(--text); text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 0.25rem; flex: 1; }
.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
}
.nav a:hover { background: var(--surface-2); }
.nav a[aria-current="page"] { background: var(--accent); color: var(--accent-text); }
.logout { display: flex; align-items: center; gap: 0.5rem; margin-left: auto; }
.who { color: var(--muted); font-size: 0.9rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }

/* Phones: brand + logout on one row, nav scrolls sideways below; header scrolls away */
@media (max-width: 640px) {
  .topbar { position: static; }
  .topbar-inner { padding: 0.5rem 0.75rem; gap: 0.35rem 0.75rem; }
  .nav { order: 3; flex: 1 0 100%; flex-wrap: nowrap; overflow-x: auto; }
  .nav a { white-space: nowrap; }
  .who { display: none; }
  .container { padding-top: 1rem; }
}

.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
}
.card.empty { text-align: center; color: var(--muted); }
.auth-card { max-width: 380px; margin: 3rem auto; }

.grid-2 { display: grid; gap: 0 1rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* Forms */

input {
  font: inherit;
  color: inherit;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  min-width: 0;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: grid; gap: 0.3rem; font-weight: 500; }
.stack { display: grid; gap: 0.85rem; }
.stack.narrow { max-width: 360px; }
.inline-form { display: flex; gap: 0.5rem; }
.inline-form input { flex: 1; max-width: 360px; }
.inline-form.wrap { flex-wrap: wrap; }
.inline-form.wrap input { flex: 1 1 200px; }

.btn {
  font: inherit;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.08); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-small { padding: 0.25rem 0.6rem; font-size: 0.85rem; }
.btn-danger-outline { color: var(--danger); border-color: var(--danger); }

.actions-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }

.flash {
  padding: 0.7rem 0.9rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  background: var(--surface-2);
}
.flash-success { background: var(--success-bg); color: var(--success-text); }
.flash-error { background: var(--error-bg); color: var(--error-text); }
.flash-warning { background: var(--warning-bg); color: var(--warning-text); }
.card .flash:last-child { margin-bottom: 0; }

.copy-row { display: flex; gap: 0.5rem; margin: 0.5rem 0 0.75rem; flex-wrap: wrap; }
.copy-row input { flex: 1 1 260px; font-size: 0.85rem; }
details.help { margin-bottom: 0.75rem; }
details.help summary { cursor: pointer; color: var(--accent); }
details.help ul { padding-left: 1.2rem; }

/* Tables */

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table { border-collapse: collapse; width: 100%; }
.table th, .table td { padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.table thead th { font-size: 0.8rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.02em; }
.table .num { text-align: right; }

.users-table td.actions { text-align: right; white-space: nowrap; }
.users-table .actions form { display: inline-block; margin-left: 0.3rem; }
.tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.05rem 0.45rem;
  color: var(--muted);
}
.pw-cell { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; }
.pw {
  font-size: 1rem;
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
}

/* Shift badges */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.8rem;
  line-height: 1.4;
  color: #fff;
  border: 0;
}
.badge-button { cursor: pointer; font: inherit; font-weight: 700; font-size: 0.8rem; }
.badge-button:focus-visible { outline: 2px solid var(--text); outline-offset: 1px; }

.shift-D { background: var(--shift-D); color: #fff; }
.shift-E { background: var(--shift-E); color: #1c1c1e; }
.shift-N { background: var(--shift-N); color: #fff; }
.shift-P { background: var(--shift-P); color: #1c1c1e; }
.shift-U { background: var(--shift-U); color: #fff; }
.shift-sD { background: var(--shift-sD); color: #1c1c1e; }

.legend { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
.legend li { display: flex; align-items: center; gap: 0.5rem; }

.upcoming { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.upcoming li { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

/* Month calendar */

.cal-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.cal-title { margin: 0; }
.cal-nav { display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap; }
.cal-nav .btn-ghost { font-size: 1.3rem; line-height: 1; padding: 0.3rem 0.7rem; }
[aria-busy="true"] .cal-grid, [aria-busy="true"] .team-wrap { opacity: 0.6; }

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}
.cal-dow {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  padding: 0.35rem;
  text-align: center;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cal-day {
  min-height: 5.5rem;
  padding: 0.3rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.cal-day.is-weekend { background: var(--weekend); }
.cal-day.is-outside .cal-date { opacity: 0.4; }
.cal-day.is-outside .cal-shift { opacity: 0.55; }
.cal-day.is-today { background: var(--today); }
.cal-day.is-today .cal-date {
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 999px;
  padding: 0 0.4rem;
  align-self: flex-start;
}
.cal-date { font-size: 0.85rem; font-weight: 600; }
.cal-shift {
  border-radius: 6px;
  padding: 0.2rem 0.35rem;
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.35rem;
  align-items: baseline;
  overflow: hidden;
}
.cal-time { font-size: 0.72rem; opacity: 0.9; font-variant-numeric: tabular-nums; }
.cal-summary { margin: 0.75rem 0 0; }

@media (max-width: 640px) {
  .cal-day { min-height: 3.6rem; padding: 0.2rem; }
  .cal-time { display: none; }
  .cal-shift { justify-content: center; padding: 0.15rem; }
  .cal-dow { font-size: 0.65rem; padding: 0.3rem 0; }
}

/* Team calendar */

.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-right: 0.5rem; }
.seg { font: inherit; font-size: 0.85rem; padding: 0.3rem 0.8rem; border: 0; background: var(--surface); color: var(--text); cursor: pointer; }
.seg + .seg { border-left: 1px solid var(--border); }
.seg[aria-pressed="true"] { background: var(--accent); color: var(--accent-text); }

.team-table { width: auto; min-width: 100%; }
.team-table th, .team-table td { padding: 0.35rem 0.3rem; text-align: center; }
.team-table .sticky-col {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--surface);
  text-align: left;
  white-space: nowrap;
  padding-right: 0.75rem;
  font-weight: 500;
}
.team-table thead .day-col { text-transform: none; letter-spacing: 0; }
.team-table .day-col { min-width: 2.6rem; }
.team-table.view-week .day-col { min-width: 4rem; }
.team-table .dow { display: block; font-size: 0.7rem; }
.team-table .dom { display: block; font-size: 0.95rem; color: var(--text); }
.team-table .is-weekend { background: var(--weekend); }
.team-table .is-today { background: var(--today); }
.team-table tfoot td, .team-table tfoot th { color: var(--muted); font-size: 0.8rem; border-bottom: 0; }

.dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 1.25rem;
  width: min(360px, calc(100vw - 2rem));
}
.dialog::backdrop { background: rgba(0, 0, 0, 0.35); }

/* Upload */

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 1rem;
}
.dropzone-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 2rem 1rem;
  cursor: pointer;
  font-weight: 400;
  text-align: center;
}
.dropzone-label strong { color: var(--accent); }
.dropzone.is-dragging { border-color: var(--accent); background: var(--today); }
.dropzone.is-busy { opacity: 0.6; pointer-events: none; }
.dropzone:focus-within { border-color: var(--accent); }

.changes { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0 1rem; margin-bottom: 1rem; }
.change-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.3rem; }
.change-list li { display: flex; align-items: center; gap: 0.35rem; }
.change-added { color: #1f8a3a; }
.change-changed { color: #c26a00; }
.change-removed { color: var(--danger); }