/* ── Reset & base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f7fa;
  color: #1a1a2e;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; max-width: 960px; width: 100%; margin: 2rem auto; padding: 0 1rem; }
footer { text-align: center; padding: .75rem; color: #888; font-size: .85rem; }

a { color: #0066cc; text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.8rem; margin-bottom: 1rem; }
h2 { font-size: 1.3rem; margin: 1.5rem 0 .75rem; }
h3 { font-size: 1.1rem; margin: 1rem 0 .5rem; }

/* ── Navigation ────────────────────────────────────────── */
header {
  background: #1a1a2e;
  color: #fff;
  padding: .75rem 1.5rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.brand { color: #fff; font-size: 1.25rem; font-weight: 700; text-decoration: none; }
.spacer { flex: 1; }
nav a { color: #cce; font-size: .9rem; }
nav a:hover { color: #fff; text-decoration: none; }
.nav-user { font-size: .85rem; color: #aab; display: flex; align-items: center; gap: .4rem; }
.avatar { width: 24px; height: 24px; border-radius: 50%; }

/* ── Forms ─────────────────────────────────────────────── */
form { display: flex; flex-direction: column; gap: .75rem; max-width: 520px; }
label { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; font-weight: 500; }
input[type=text], input[type=password], input[type=url], input[type=number],
input[type=date], input[type=email], textarea, select {
  padding: .5rem .75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  background: #fff;
}
textarea { resize: vertical; min-height: 80px; }
.checkbox-label { flex-direction: row; align-items: center; gap: .5rem; }
.inline-form { flex-direction: row; flex-wrap: wrap; gap: .5rem; align-items: center; max-width: none; }
.inline-form label { flex-direction: row; }

/* ── Buttons ───────────────────────────────────────────── */
button, .btn {
  display: inline-block;
  padding: .45rem 1rem;
  background: #0066cc;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: .9rem;
  text-decoration: none;
}
button:hover, .btn:hover { background: #0055aa; text-decoration: none; }
.btn-danger { background: #cc2200; }
.btn-danger:hover { background: #aa1a00; }
.btn-sm { padding: .3rem .7rem; font-size: .8rem; }
.btn-github {
  display: inline-block;
  padding: .55rem 1.25rem;
  background: #24292e;
  color: #fff;
  border-radius: 6px;
  font-size: 1rem;
}
.btn-github:hover { background: #444d56; text-decoration: none; }

/* ── Cards ─────────────────────────────────────────────── */
.card { background: #fff; border-radius: 10px; box-shadow: 0 1px 4px rgba(0,0,0,.08); padding: 1.25rem; margin: 1rem 0; }

.card-list { list-style: none; padding: 0; }
.card-list li { padding: .5rem 0; border-bottom: 1px solid #eee; }
.card-list li:last-child { border-bottom: none; }

.week-card { background: #fff; border: 1px solid #e0e0e0; border-radius: 10px; padding: 1rem; margin: 1rem 0; }
.week-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .75rem; }

.activity-list { list-style: none; padding: 0; }
.activity-list li { padding: .4rem 0; display: flex; align-items: center; gap: .5rem; }

.group-card { background: #f9f9f9; border: 1px solid #ddd; border-radius: 8px; padding: .75rem; margin: .5rem 0; }
.group-card ul { list-style: disc; padding-left: 1.25rem; margin: .4rem 0; }

/* ── Misc ──────────────────────────────────────────────── */
.badge { background: #0066cc; color: #fff; font-size: .75rem; padding: .15rem .5rem; border-radius: 10px; }
.due { color: #888; font-size: .8rem; }
.muted { color: #888; font-style: italic; }
.error { color: #cc2200; background: #fff0ed; border: 1px solid #ffcccc; padding: .6rem 1rem; border-radius: 6px; }
.hint { color: #777; font-size: .85rem; margin-top: .5rem; }

.page-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.page-header h1 { margin-bottom: 0; flex: 1; }

dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: .3rem .75rem; margin: 1rem 0; }
dt { font-weight: 600; color: #555; }

table { width: 100%; border-collapse: collapse; margin: .75rem 0; }
th, td { text-align: left; padding: .5rem .75rem; border-bottom: 1px solid #eee; }
th { font-size: .85rem; color: #555; background: #fafafa; }

/* ── Center card (login/setup) ─────────────────────────── */
.center-card {
  max-width: 440px;
  margin: 4rem auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.1);
  padding: 2rem;
}
.center-card h1 { margin-bottom: 1.5rem; text-align: center; }
.center-card section { margin: 1.25rem 0; }
hr { border: none; border-top: 1px solid #eee; margin: 1.5rem 0; }