:root {
  color-scheme: light;
  --bg: #f5f5f5;
  --surface: #ffffff;
  --surface-soft: #fafafa;
  --text: #090909;
  --muted: #6b6b6b;
  --line: #e2e2e2;
  --line-strong: #d2d2d2;
  --accent: #111111;
  --accent-soft: #efefef;
  --warn: #8a6424;
  --danger: #9b2f34;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: start;
  margin: 0 auto 28px;
}

.brand-block {
  display: grid;
  gap: 6px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 0.98;
  font-weight: 800;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.55;
}

h2 {
  margin-bottom: 14px;
  font-size: 1.05rem;
  font-weight: 800;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}

.summary-grid article,
.panel,
.course-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.summary-grid article {
  padding: 16px 18px;
}

.summary-grid span {
  display: block;
  font-size: 1.65rem;
  line-height: 1;
  font-weight: 800;
}

.summary-grid p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.workspace {
  display: grid;
  gap: 24px;
}

.course-area {
  display: grid;
  gap: 12px;
}

.panel {
  width: min(100%, 640px);
  margin: 4px auto 0;
  padding: 22px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: #464646;
  font-size: 0.86rem;
  font-weight: 750;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  background: #fff;
}

input::placeholder {
  color: #8a8a8a;
}

input:focus,
select:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(0, 0, 0, 0.08);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary-button,
.secondary-button,
.ghost-button,
.danger-button {
  min-height: 44px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 800;
}

.primary-button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
}

.primary-button:hover {
  background: #2a2a2a;
}

.secondary-button {
  border: 1px solid var(--accent);
  background: #fff;
  color: var(--accent);
}

.secondary-button:hover {
  background: var(--accent-soft);
}

.ghost-button {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  padding: 0 16px;
}

.ghost-button:hover {
  background: var(--accent-soft);
}

.danger-button {
  width: fit-content;
  min-height: 36px;
  border: 0;
  background: transparent;
  color: var(--danger);
  padding: 0;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 10px;
}

.course-list {
  display: grid;
  gap: 12px;
}

.course-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 20px;
  padding: 18px;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.03);
}

.course-main,
.course-side {
  display: grid;
  gap: 13px;
  align-content: start;
}

.course-heading {
  display: grid;
  gap: 8px;
}

.course-card h3 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.25;
  font-weight: 800;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 12px;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.course-link-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.zoom-link {
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.zoom-link:hover {
  text-decoration: underline;
}

.zoom-chip {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 0 9px;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
}

.booking-block {
  display: grid;
  gap: 8px;
}

.booking-block h4 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 800;
}

.booking-list {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.booking-list li {
  display: grid;
  gap: 5px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.booking-person {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.booking-list strong,
.booking-list span,
.booking-list em {
  min-width: 0;
  overflow-wrap: anywhere;
}

.booking-list span,
.booking-list em,
.booking-empty,
.booking-closed {
  color: var(--muted);
  font-size: 0.86rem;
}

.booking-list em {
  font-style: normal;
}

.booking-list small {
  color: var(--muted);
  font-size: 0.8rem;
}

.payment-chip {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  border-radius: 999px;
  padding: 0 8px;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
}

.payment-chip[data-status="paid"] {
  background: #e8f1e9;
  color: #256335;
}

.payment-button {
  width: fit-content;
  min-height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 0 10px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
}

.payment-button:hover {
  background: var(--accent-soft);
}

.payment-button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.booking-form {
  display: grid;
  gap: 10px;
  padding: 12px 0 0;
  border-top: 1px solid var(--line);
}

.booking-closed {
  display: grid;
  place-items: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-soft);
  color: var(--danger);
  font-weight: 800;
}

.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 27px;
  border-radius: 999px;
  padding: 0 10px;
  background: var(--accent-soft);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.badge[data-status="ausgebucht"] {
  background: #f5e8e8;
  color: var(--danger);
}

.badge[data-status="geplant"] {
  background: #f5efe4;
  color: var(--warn);
}

.empty-state {
  padding: 28px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
  background: rgba(255, 255, 255, 0.55);
}

@media (max-width: 820px) {
  .app-shell {
    width: min(100% - 24px, 960px);
    padding-top: 24px;
  }

  .topbar,
  .summary-grid,
  .toolbar,
  .course-card {
    grid-template-columns: 1fr;
  }

  .ghost-button {
    width: fit-content;
  }
}

@media (max-width: 520px) {
  .app-shell {
    width: min(100% - 20px, 960px);
    padding-bottom: 36px;
  }

  h1 {
    font-size: 2.2rem;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .course-card,
  .panel {
    padding: 16px;
  }
}