/* PurpleSensor — stylesheet */

:root {
  --purple:        #7b2fbe;
  --purple-light:  #9d54d4;
  --purple-pale:   #f3eafd;
  --purple-dark:   #4a1a7a;
  --text:          #1a1a2e;
  --text-muted:    #666;
  --border:        #ddd;
  --bg:            #fafafa;
  --card-bg:       #ffffff;
  --success:       #1a7a3a;
  --error:         #b91c1c;
  --error-bg:      #fef2f2;
  --radius:        10px;
  --shadow:        0 2px 12px rgba(0,0,0,0.07);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--purple); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ──────────────────────────────────────────────────────── */
.site-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
}

.header-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: bold;
  letter-spacing: -0.02em;
  color: var(--purple-dark);
}

.logo-dot {
  width: 14px;
  height: 14px;
  background: var(--purple);
  border-radius: 50%;
  display: inline-block;
}

.header-links {
  display: flex;
  gap: 1.5rem;
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
}

/* ── Main layout ─────────────────────────────────────────────────── */
main {
  flex: 1;
  padding: 2rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.stage { width: 100%; }
.stage.hidden { display: none; }
.stage.active { display: block; }

/* ── Stage 1: Upload ─────────────────────────────────────────────── */
.stage-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2.5rem;
  align-items: start;
}

.about-col h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--purple-dark);
}

.about-col p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.supported-formats {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--purple-pale);
  border-radius: var(--radius);
}

.supported-formats h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--purple-dark);
  margin-bottom: 0.6rem;
  font-family: system-ui, sans-serif;
}

.supported-formats ul {
  list-style: none;
  font-size: 0.9rem;
  font-family: system-ui, sans-serif;
}

.supported-formats li {
  padding: 0.2rem 0;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ext {
  font-family: monospace;
  font-size: 0.8rem;
  background: white;
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--purple);
  border: 1px solid var(--purple-light);
}

/* Drop zone */
.drop-zone {
  border: 2.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: var(--card-bg);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--purple);
  background: var(--purple-pale);
}

.drop-zone.drag-over .drop-icon { color: var(--purple); }

.drop-icon {
  color: var(--border);
  margin-bottom: 1rem;
  transition: color 0.15s;
}

.drop-primary {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.drop-secondary {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.btn-browse {
  display: inline-block;
  background: var(--purple);
  color: white;
  padding: 0.55rem 1.4rem;
  border-radius: 6px;
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-browse:hover { background: var(--purple-dark); }

.drop-hint {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: system-ui, sans-serif;
}

/* Upload status / error */
.upload-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding: 0.85rem 1.1rem;
  background: var(--purple-pale);
  border-radius: var(--radius);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  color: var(--purple-dark);
}

.status-spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid var(--purple-light);
  border-top-color: var(--purple-dark);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

.upload-error {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding: 0.85rem 1.1rem;
  background: var(--error-bg);
  border: 1px solid #fca5a5;
  border-radius: var(--radius);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  color: var(--error);
}

.hidden { display: none !important; }

/* ── Stage 2 ─────────────────────────────────────────────────────── */
.stage-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* File summary card */
.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.1rem;
}

.summary-badge {
  display: inline-block;
  background: var(--purple-pale);
  color: var(--purple-dark);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.summary-label {
  font-family: system-ui, sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.summary-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}

/* Config card */
.config-title {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  color: var(--purple-dark);
}

.config-section {
  margin-bottom: 1.4rem;
}

.config-label {
  display: block;
  font-family: system-ui, sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.toggle-btn {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: left;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toggle-hint {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text-muted);
}

.toggle-btn.active {
  border-color: var(--purple);
  background: var(--purple-pale);
  color: var(--purple-dark);
}

.toggle-btn.active .toggle-hint { color: var(--purple); }

.toggle-btn:hover:not(.active) {
  border-color: var(--purple-light);
  color: var(--text);
}

.select-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.select-btn {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 0.35rem 0.9rem;
  font-family: system-ui, sans-serif;
  font-size: 0.87rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.select-btn.active {
  border-color: var(--purple);
  background: var(--purple-pale);
  color: var(--purple-dark);
  font-weight: 600;
}

.select-btn:hover:not(.active) {
  border-color: var(--purple-light);
  color: var(--text);
}

.date-input {
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  background: white;
  width: 200px;
}

.date-input:focus {
  outline: none;
  border-color: var(--purple);
}

.config-hint {
  margin-top: 0.4rem;
  font-family: system-ui, sans-serif;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.checkbox-group {
  display: flex;
  gap: 1.5rem;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: system-ui, sans-serif;
  font-size: 0.92rem;
  cursor: pointer;
}

.checkbox-item input[type=checkbox] {
  accent-color: var(--purple);
  width: 16px;
  height: 16px;
}

.btn-generate {
  width: 100%;
  background: var(--purple);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: 0.85rem;
  font-family: system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn-generate:hover:not(:disabled) { background: var(--purple-dark); }
.btn-generate:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ── Results ─────────────────────────────────────────────────────── */
.result-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.25rem;
  background: var(--purple-pale);
  border-bottom: 1px solid var(--border);
}

.result-meta {
  font-family: system-ui, sans-serif;
  font-size: 0.82rem;
  color: var(--purple-dark);
}

.result-actions {
  display: flex;
  gap: 0.75rem;
}

.btn-download, .btn-view {
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  border: 1.5px solid;
  transition: background 0.15s;
}

.btn-download {
  background: var(--purple);
  color: white;
  border-color: var(--purple);
}

.btn-download:hover { background: var(--purple-dark); border-color: var(--purple-dark); }

.btn-view {
  background: white;
  color: var(--purple);
  border-color: var(--purple-light);
}

.btn-view:hover { background: var(--purple-pale); }

.result-image-wrap {
  padding: 1.25rem;
  text-align: center;
}

.result-image-wrap img {
  max-width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}

.render-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2.5rem;
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  color: var(--purple-dark);
}

.render-error {
  padding: 1.25rem;
  background: var(--error-bg);
  color: var(--error);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  border-top: 1px solid #fca5a5;
}

/* Misc */
.btn-link {
  background: none;
  border: none;
  color: var(--purple);
  font-family: system-ui, sans-serif;
  font-size: 0.87rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

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

.upload-new-btn { font-size: 0.85rem; }

/* ── Footer ──────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem;
  font-family: system-ui, sans-serif;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .stage-layout {
    grid-template-columns: 1fr;
  }

  .about-col { order: 2; }
  .upload-col { order: 1; }

  .toggle-group {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.4rem;
  }
}