:root {
  font-size: 90%;
  --bg-color: #f3f4f6;
  --surface-color: #ffffff;
  --surface-elevated: #f8fafc;
  --border-color: #d1d5db;
  --text-primary: #1f2937;
  --text-muted: #4b5563;
  --accent-color: #4a5568;
  --shadow-color: rgba(15, 23, 42, 0.08);
  --overlay-color: rgba(32, 41, 52, 0.45);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg-color: #1f2933;
  --surface-color: #27323f;
  --surface-elevated: #313e4d;
  --border-color: #3b4552;
  --text-primary: #e5e7eb;
  --text-muted: #cbd5e1;
  --accent-color: #9aa5b1;
  --shadow-color: rgba(15, 23, 42, 0.35);
  --overlay-color: rgba(15, 23, 42, 0.65);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 24px;
}

.app {
  width: min(720px, 100%);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.app__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.app__controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.app__controls--left {
  justify-content: flex-start;
}

.app__controls--right {
  margin-left: auto;
  justify-content: flex-end;
  gap: 8px;
}

.task-board {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 24px 45px -25px var(--shadow-color);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.task-board:empty::before {
  content: "Noch keine Aufgaben erfasst. Über den Button oben kannst du starten.";
  color: var(--text-muted);
  text-align: center;
  padding: 32px 8px;
  border: 2px dashed var(--border-color);
  border-radius: 12px;
}

.task-card {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.task-card:active {
  cursor: grabbing;
}

.task-card.dragging {
  opacity: 0.85;
  transform: scale(1.02);
  box-shadow: 0 18px 50px -30px var(--shadow-color);
}

.task-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.task-card__title {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.2;
}

.task-card__meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-left: auto;
}

.task-card__edit,
.task-card__close {
  flex-shrink: 0;
}

.task-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.task-card__contact {
  margin: 0;
}

.task-card__notes {
  margin: 0;
  white-space: pre-line;
}

.task-card__notes.is-empty {
  font-style: italic;
}

.button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  background: none;
  color: inherit;
  cursor: pointer;
  transition: transform 0.1s ease, background-color 0.15s ease, color 0.15s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button--primary {
  background-color: var(--accent-color);
  color: var(--surface-color);
  border-color: transparent;
}

.button--primary:hover {
  filter: brightness(1.08);
}

.button--ghost {
  border-color: var(--border-color);
  background-color: transparent;
}

.button--ghost:hover {
  background-color: var(--surface-elevated);
}

.button--icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 1.1rem;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background-color: var(--overlay-color);
  padding: 24px;
  z-index: 1000;
}

.modal.is-visible {
  display: flex;
}

.modal__content {
  background-color: var(--surface-color);
  color: var(--text-primary);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  width: min(420px, 100%);
  padding: 24px;
  box-shadow: 0 30px 70px -45px var(--shadow-color);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.modal__header h2 {
  margin: 0;
}

.modal__content--archive {
  width: calc(100vw - 40px);
  height: calc(100vh - 40px);
  max-width: calc(100vw - 40px);
  max-height: calc(100vh - 40px);
  overflow: hidden;
}

.modal__content--data {
  width: min(460px, 100%);
  gap: 16px;
}

.data-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background-color: var(--surface-elevated);
}

.data-section h3 {
  margin: 0;
  font-size: 1.05rem;
}

.data-section__export {
  align-self: flex-start;
  text-decoration: none;
}

.data-import {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.data-import__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.95rem;
}

.data-import__field span {
  font-weight: 600;
}

.data-import__field input {
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.95rem;
  background-color: var(--surface-color);
  color: inherit;
}

.data-import__help {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.archive-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  padding-right: 4px;
  flex: 1;
}

.archive-list:empty::before {
  content: "Noch keine Aufgaben im Archiv.";
  color: var(--text-muted);
  padding: 24px 0;
  text-align: center;
}

.archive-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px 16px;
  background-color: var(--surface-elevated);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.archive-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.archive-card__title {
  margin: 0;
  font-size: 1rem;
}

.archive-card__meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
}

.archive-card__delete {
  flex-shrink: 0;
}

.archive-card__contact,
.archive-card__notes {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: pre-line;
}

.archive-card__notes:empty::before {
  content: "Keine Notizen.";
  font-style: italic;
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.95rem;
}

.modal__field span {
  font-weight: 600;
}

.modal__field input,
.modal__field textarea {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 1rem;
  font-family: inherit;
  background-color: var(--surface-elevated);
  color: inherit;
}

.modal__field input:focus,
.modal__field textarea:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

@media (max-width: 600px) {
  body {
    padding: 16px;
  }

  .modal__content--archive {
    width: calc(100vw - 24px);
    height: calc(100vh - 24px);
    max-width: calc(100vw - 24px);
    max-height: calc(100vh - 24px);
  }
  
  .modal__content--data {
    width: min(100%, 420px);
  }

  .task-board {
    padding: 20px;
  }

  .task-card {
    padding: 14px 16px;
  }
}