/* ============================================================
   style.css — Canvas-Generator (iPad-optimiert)
   Farbschema und Basics orientieren sich an base.css
   ============================================================ */

:root {
  --color-positive: #2563eb;
  --color-positive-soft: #dbeafe;
  --color-negative: #d97706;
  --color-negative-soft: #fef3c7;
  --color-accent: #0f766e;
  --color-accent-soft: #e6f3f1;

  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-surface-soft: #f5f5f4;
  --color-border: #e7e5e4;
  --color-border-strong: #d6d3d1;
  --color-text: #1c1917;
  --color-text-muted: #57534e;
  --color-text-soft: #78716c;
  --color-error: #dc2626;
  --color-error-soft: #fef2f2;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1.0625rem;
  --fs-md: 1.1875rem;
  --fs-lg: 1.5rem;
  --fs-xl: 2rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --transition-fast: 120ms ease-out;
  --transition-base: 220ms ease-out;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[hidden] { display: none !important; }

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

/* ─── Setup-Screen ─────────────────────────────────────────── */

.setup {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background-color: var(--color-surface-soft);
}

.setup__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  max-width: 420px;
  width: 100%;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.setup__title {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  text-align: center;
}

.setup__lead {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  text-align: center;
  margin: 0 0 1.5rem;
}

.setup__label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin-bottom: 0.4rem;
}

.setup__input {
  display: block;
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
  -webkit-appearance: none;
}

.setup__input:focus {
  outline: none;
  border-color: var(--color-positive);
  box-shadow: 0 0 0 3px var(--color-positive-soft);
}

.setup__btn {
  width: 100%;
  margin-top: 1.25rem;
  justify-content: center;
}

.setup__error {
  margin-top: 0.6rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-error-soft);
  color: var(--color-error);
  font-size: var(--fs-sm);
  font-weight: 500;
}

/* ─── Buttons ──────────────────────────────────────────────── */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-md);
  background-color: var(--color-positive);
  color: #fff;
  font-weight: 600;
  font-size: var(--fs-sm);
  min-height: 48px;
  transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
}

.btn-primary:hover { background-color: #1d4ed8; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled {
  opacity: 0.55;
  cursor: default;
  transform: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--fs-sm);
  min-height: 44px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.btn-secondary:hover { border-color: var(--color-positive); }

.btn-link {
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.btn-link:hover { color: var(--color-positive); }

/* ─── Spinner ──────────────────────────────────────────────── */

.btn-spinner {
  width: 1.1em;
  height: 1.1em;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.is-loading .btn-label { display: none; }
.is-loading .btn-spinner { display: inline-block; }
.is-loading { pointer-events: none; }

/* ─── Hauptansicht ─────────────────────────────────────────── */

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 840px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

.app__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(0.75rem, 2vw, 1.25rem) 0;
  border-bottom: 1px solid var(--color-border);
}

.app__title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: 0;
}

.app__header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.app__keyhint {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
}

/* ─── Prompt-Bereich ───────────────────────────────────────── */

.prompt-area {
  padding-top: clamp(1rem, 3vw, 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.prompt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  min-height: 44px;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.chip:hover {
  border-color: var(--color-positive);
  color: var(--color-text);
  background-color: var(--color-positive-soft);
}

.chip.is-active {
  background-color: var(--color-positive);
  border-color: var(--color-positive);
  color: #fff;
}

.prompt-input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-surface);
  resize: vertical;
  min-height: 80px;
  transition: border-color var(--transition-fast);
  -webkit-appearance: none;
}

.prompt-input:focus {
  outline: none;
  border-color: var(--color-positive);
  box-shadow: 0 0 0 3px var(--color-positive-soft);
}

.prompt-area__btn {
  align-self: flex-start;
}

/* ─── Canvas-Bereich ───────────────────────────────────────── */

.canvas-wrap {
  margin-top: clamp(1rem, 3vw, 1.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 260px;
  position: relative;
}

.canvas-wrap iframe {
  display: block;
  width: 100%;
  border: none;
  min-height: 400px;
}

.canvas-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 3rem 1.5rem;
  color: var(--color-text-soft);
  text-align: center;
}

.canvas-placeholder__icon {
  font-size: 2.5rem;
  line-height: 1;
}

.canvas-placeholder__spinner {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-positive);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.canvas-placeholder__text {
  font-size: var(--fs-sm);
}

.canvas-placeholder.is-loading .canvas-placeholder__icon {
  display: none;
}

.canvas-placeholder.is-loading .canvas-placeholder__spinner {
  display: block;
}

.canvas-placeholder.is-loading .canvas-placeholder__text {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
}

/* ─── Iterations-Bereich ────────────────────────────────────── */

.iterate-area {
  margin-top: clamp(0.75rem, 2vw, 1rem);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.iterate-area__label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.iterate-area__textarea {
  min-height: 56px !important;
}

.iterate-area__btn {
  align-self: flex-start;
}

/* ─── Quellcode-Details ────────────────────────────────────── */

.source-details {
  margin-top: 1rem;
  margin-bottom: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.source-summary {
  padding: 0.75rem 1rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  list-style: none;
  user-select: none;
  -webkit-user-select: none;
}

.source-summary::-webkit-details-marker { display: none; }
.source-summary::before { content: "▸ "; color: var(--color-text-soft); }
.source-details[open] .source-summary::before { content: "▾ "; }

.source-editor {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.source-editor__textarea {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-surface-soft);
  border: none;
  resize: vertical;
  padding: 0.75rem 1rem;
  min-height: 240px;
  max-height: 500px;
  overflow-y: auto;
  tab-size: 2;
  outline: none;
}

.source-editor__textarea:focus {
  background: #eeedec;
}

.source-editor__actions {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 1rem 0.75rem;
  background: var(--color-surface);
}

.source-editor__btn {
  min-height: 40px;
  padding: 0.45rem 0.9rem;
  font-size: var(--fs-xs);
}

/* ─── Fehler-Overlay ───────────────────────────────────────── */

.error-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  z-index: 100;
  padding: 1rem;
}

.error-overlay__content {
  background: var(--color-surface);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
}

.error-overlay__msg {
  font-size: var(--fs-base);
  color: var(--color-error);
  margin: 0 0 1rem;
  line-height: 1.55;
}

/* ─── Speichern / Laden Overlay ──────────────────────────────── */

.save-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  z-index: 110;
  padding: 1rem;
}

.save-overlay__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 400px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.save-overlay__card--wide {
  max-width: 480px;
}

.save-overlay__title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: 0;
}

.save-overlay__label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.save-overlay__input {
  display: block;
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
  -webkit-appearance: none;
}

.save-overlay__input:focus {
  outline: none;
  border-color: var(--color-positive);
  box-shadow: 0 0 0 3px var(--color-positive-soft);
}

.save-overlay__actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 0.25rem;
}

.load-list {
  max-height: 320px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.25rem 0;
}

.load-list__empty {
  color: var(--color-text-soft);
  font-size: var(--fs-sm);
  text-align: center;
  padding: 1.5rem 0;
  margin: 0;
}

.load-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  background: var(--color-surface);
}

.load-item:hover {
  background: var(--color-positive-soft);
  border-color: var(--color-positive);
}

.load-item__name {
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.load-item__time {
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
}

/* ─── iPad / responsive Anpassungen ─────────────────────────── */

@media (max-width: 600px) {
  .app__header {
    flex-wrap: wrap;
  }
  
  .prompt-chips {
    justify-content: center;
  }

  .prompt-area__btn {
    align-self: stretch;
  }

  .canvas-wrap iframe {
    min-height: 320px;
  }

  .iterate-area__btn {
    align-self: stretch;
  }
}