:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #2b2b2b;
  --border: #dcdcdc;
  --card-bg: #fafafa;
  --ok-bg: #e6f4ea;
  --ok-fg: #1e7a34;
  --err-bg: #fdeaea;
  --err-fg: #a31515;
  --warn-bg: #fff6e0;
  --warn-fg: #8a5a00;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
}

h1 {
  margin-bottom: 0.25rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo {
  width: 60px;
  height: 60px;
  flex: 0 0 60px;
  object-fit: contain;
}

.subtitle {
  color: #666;
  margin-top: 0;
}

.layout {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.form-column {
  flex: 1 1 480px;
  min-width: 0;
}

.preview-column {
  flex: 0 0 320px;
  position: sticky;
  top: 2rem;
}

.preview-card {
  text-align: center;
}

.preview-image-wrap {
  position: relative;
}

.preview-image-wrap img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: repeating-conic-gradient(#eee 0% 25%, #fff 0% 50%) 50% / 16px 16px;
}

.preview-image-wrap .spinner {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  margin-left: 0;
  background: rgba(255, 255, 255, 0.85);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

@media (max-width: 800px) {
  .layout {
    flex-direction: column;
  }

  .preview-column {
    position: static;
    width: 100%;
    max-width: 320px;
  }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.05rem;
  color: var(--text);
}

.hint {
  color: #777;
  font-size: 0.85rem;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

/* ---- Branding section ---- */

.section-sub {
  margin: -0.35rem 0 1.25rem;
}

.group-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a8a8a;
  margin-bottom: 0.625rem;
}

.content-rows {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-bottom: 1.5rem;
}

.content-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.row-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.content-row > .row-label {
  flex: 0 0 74px;
}

.logo-control,
.banner-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.logo-thumb {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
  padding: 2px;
}

input[type="file"] {
  font-size: 0.85rem;
  color: #666;
  max-width: 100%;
}

input[type="file"]::file-selector-button {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  margin-right: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
}

input[type="file"]::file-selector-button:hover {
  background: #f4f4f4;
}

.char-count {
  font-size: 0.78rem;
  color: #999;
  font-variant-numeric: tabular-nums;
  flex: 0 0 auto;
}

.link-btn {
  border: 0;
  background: none;
  color: #0b5394;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0;
}

.link-btn:hover {
  color: #08406f;
  text-decoration: underline;
}

.element-grid {
  display: grid;
  grid-template-columns: 74px auto auto;
  justify-content: start;
  gap: 0.75rem 1.75rem;
  align-items: center;
}

.grid-head {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #a5a5a5;
}

.seg {
  display: flex;
  width: fit-content;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: #ffffff;
}

.seg-btn {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.44rem 0.75rem;
  border: 0;
  border-radius: 0;
  font-family: inherit;
  font-size: 0.825rem;
  font-weight: 500;
  background: #ffffff;
  color: #5a5a5a;
  cursor: pointer;
  white-space: nowrap;
}

.seg-btn + .seg-btn {
  border-left: 1px solid var(--border);
}

.seg-btn:hover {
  background: #f4f4f4;
}

.seg-btn.is-active {
  background: #e8f0f8;
  color: #0b5394;
  font-weight: 600;
}

.card-footer {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid #e7e7e7;
  display: flex;
  justify-content: flex-end;
}

@media (max-width: 800px) {
  .element-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .element-grid .grid-head {
    display: none;
  }

  .element-grid > .row-label {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
  }

  .element-grid .seg {
    width: 100%;
    margin-bottom: 0.5rem;
  }

  .element-grid .seg-btn {
    flex: 1 1 0;
    justify-content: center;
  }

  .content-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  /* In a column flex container a 74px flex-basis would become the label's
     HEIGHT, leaving a tall empty gap above each control. */
  .content-row > .row-label {
    flex: 0 0 auto;
  }

  .logo-control,
  .banner-control {
    flex-wrap: wrap;
    width: 100%;
  }

  .banner-control input[type="text"] {
    flex: 1 1 auto;
    min-width: 0;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.field input[type="text"],
.field select {
  font-weight: normal;
  padding: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #ffffff;
  color: var(--text);
}

.field input[type="color"] {
  width: 2.4rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  flex: 0 0 auto;
}

.color-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hex-input {
  font-weight: normal;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #ffffff;
  color: var(--text);
  width: 6.5rem;
  text-transform: lowercase;
}

.hex-input.invalid {
  border-color: var(--err-fg);
}

button {
  font-size: 1rem;
  padding: 0.6rem 1.4rem;
  border: none;
  border-radius: 6px;
  background: #0b5394;
  color: white;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.spinner {
  margin-left: 0.75rem;
  color: #555;
}

/* Generate progress: spinner + live "142 / 300" + Cancel. A batch runs for
   minutes, so this is on screen a long time -- keep it calm. */
.gen-status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: 0.85rem;
  vertical-align: middle;
}

/* REQUIRED: this class sets `display`, which outranks the UA stylesheet's
   [hidden] { display: none } -- without this the spinner and Cancel button
   stay on screen permanently, even when no job is running. */
.gen-status[hidden] {
  display: none;
}

.gen-spin {
  width: 1rem;
  height: 1rem;
  flex: 0 0 1rem;
  border: 2px solid var(--border);
  border-top-color: #0b5394;
  border-radius: 50%;
  animation: gen-spin 0.8s linear infinite;
}

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

.gen-count {
  font-size: 0.9rem;
  color: #555;
  font-variant-numeric: tabular-nums;  /* stops the count jittering as it counts up */
}

/* This animates for minutes at a stretch, so honour the OS setting. The
   count itself still updates, so progress is not lost -- only the spin. */
@media (prefers-reduced-motion: reduce) {
  .gen-spin {
    animation: none;
    border-top-color: var(--border);
    background: #0b5394;
  }
}

.validation-result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
}

.validation-result.ok {
  background: var(--ok-bg);
  color: var(--ok-fg);
}

.validation-result.error {
  background: var(--err-bg);
  color: var(--err-fg);
}

.validation-result.warning {
  background: var(--warn-bg);
  color: var(--warn-fg);
  text-align: left;
}

.validation-result.warning ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
}

.validation-result table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.validation-result th,
.validation-result td {
  text-align: left;
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}