:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-text: #1d2129;
  --color-muted: #6b7280;
  --color-border: #dcdfe4;
  --color-primary: #2b5fb8;
  --color-danger: #c62828;
  --ampel-gruen: #2e8b40;
  --ampel-gelb: #d69e00;
  --ampel-rot: #c62828;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.4;
}

h1, h2 { margin: 0 0 .5em; }
a { color: var(--color-primary); }
.muted { color: var(--color-muted); }

/* --- Board-Seite (Schüler:innen) --- */
.board-header { padding: 1rem 1.25rem 0.5rem; }
.modul-titel { font-weight: 400; color: var(--color-muted); }

.lock-banner {
  background: #fff3cd;
  border: 1px solid #ffe08a;
  color: #7a5b00;
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  margin: 0 1.25rem 1rem;
}

.board-columns {
  display: flex;
  gap: 1rem;
  padding: 0 1.25rem 2rem;
  align-items: flex-start;
}

@media (max-width: 900px) {
  .board-columns {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  .board-columns .column {
    min-width: 85vw;
    scroll-snap-align: start;
  }
}

.column {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  flex: 1;
  min-width: 260px;
}

.column h2 { font-size: 1.05rem; }
.count { color: var(--color-muted); font-weight: 400; font-size: 0.9em; }

.card-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 40px;
}

.card {
  display: flex;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.card-ampel-strip { width: 8px; flex-shrink: 0; }
.card-ampel-strip.ampel-gruen, .ampel-btn.ampel-gruen { background: var(--ampel-gruen); }
.card-ampel-strip.ampel-gelb, .ampel-btn.ampel-gelb { background: var(--ampel-gelb); }
.card-ampel-strip.ampel-rot, .ampel-btn.ampel-rot { background: var(--ampel-rot); }

.card-body { padding: 0.6rem 0.75rem; flex: 1; }
.card-title { font-weight: 600; cursor: pointer; word-break: break-word; }
.card-meta { font-size: 0.78rem; color: var(--color-muted); margin-top: 0.15rem; }

.card-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.ampel-buttons { display: flex; gap: 0.4rem; }
.ampel-btn {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
}
.ampel-btn.active { border-color: var(--color-text); }

.move-buttons { display: flex; gap: 0.3rem; }
.move-buttons button, .delete-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 6px;
  cursor: pointer;
  min-width: 34px;
  min-height: 34px;
  font-size: 1rem;
}
.move-buttons button:disabled { opacity: 0.3; cursor: default; }
.delete-btn { color: var(--color-danger); }

.new-card-form { display: flex; gap: 0.4rem; margin-top: 0.6rem; }
.new-card-form input { flex: 1; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: 6px; }
.new-card-form button {
  background: var(--color-primary); color: #fff; border: none;
  border-radius: 6px; width: 40px; font-size: 1.1rem; cursor: pointer;
}

.notice-box {
  max-width: 480px;
  margin: 4rem auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

/* Namens-Modal */
.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  align-items: center; justify-content: center;
  padding: 1rem;
  z-index: 10;
}
.modal:not([hidden]) { display: flex; }
.modal-box {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 360px;
  width: 100%;
}
.modal-box input {
  width: 100%; padding: 0.6rem; margin: 0.75rem 0;
  border: 1px solid var(--color-border); border-radius: 6px;
  font-size: 1rem;
}
.modal-box button {
  background: var(--color-primary); color: #fff; border: none;
  padding: 0.6rem 1.2rem; border-radius: 6px; cursor: pointer; font-size: 1rem;
}

.loading { padding: 2rem; color: var(--color-muted); }

/* --- Admin --- */
.admin-nav {
  display: flex; gap: 1.25rem; align-items: center;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.25rem;
  flex-wrap: wrap;
}
.admin-nav a { text-decoration: none; }
.admin-main { max-width: 960px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }

.data-table, .overview-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 2rem;
  background: var(--color-surface);
}
.data-table th, .data-table td,
.overview-table th, .overview-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 0.55rem 0.7rem;
  text-align: left;
}
.row-alert { background: #fdecea; }

.status-pill {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  margin-left: 0.5rem;
  vertical-align: middle;
}
.status-offen { background: #e3f2e6; color: #1e6b30; }
.status-abgeschlossen { background: #eceff1; color: #455a64; }

.action-row { display: flex; gap: 0.75rem; align-items: center; margin: 1rem 0; flex-wrap: wrap; }

a.button, button[type="submit"], .button-danger {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95rem;
  font-family: inherit;
}
.button-danger { background: var(--color-danger); }

.inline-form { display: flex; gap: 0.5rem; margin: 1rem 0; flex-wrap: wrap; align-items: center; }
.inline { display: inline-flex; }
.actions form { display: inline-block; margin-right: 0.4rem; }

.stacked-form { display: flex; flex-direction: column; gap: 1rem; max-width: 480px; margin-bottom: 2rem; }
.stacked-form label { display: flex; flex-direction: column; gap: 0.3rem; font-weight: 600; }
.stacked-form input[type="text"] { padding: 0.5rem; border: 1px solid var(--color-border); border-radius: 6px; font-weight: 400; }
fieldset { border: 1px solid var(--color-border); border-radius: 6px; padding: 0.75rem; }
.checkbox-label { display: block; font-weight: 400; margin: 0.3rem 0; }

.token-link { font-size: 0.8rem; word-break: break-all; }

.admin-login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 340px;
  display: flex; flex-direction: column; gap: 1rem;
}
.login-box label { display: flex; flex-direction: column; gap: 0.3rem; font-weight: 600; }
.login-box input { padding: 0.6rem; border: 1px solid var(--color-border); border-radius: 6px; font-weight: 400; }
.error { color: var(--color-danger); }

.admin-readonly .card-body { padding-bottom: 0.6rem; }