:root {
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 45%, #fdf2f8 100%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 12px 32px rgba(15, 23, 42, 0.08);
  padding: 2rem;
  width: 100%;
  max-width: 460px;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 0.25rem;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.45rem;
  border-radius: 10px;
  display: flex;
  transition: background 0.15s ease, color 0.15s ease, transform 0.3s ease;
}

.icon-btn:hover {
  background: var(--surface-soft);
  color: var(--text);
  transform: rotate(45deg);
}

/* ---------- form ---------- */

.qr-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mode-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.mode-label select {
  flex: 1;
}

.mode-fields {
  border: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.mode-fields[hidden] {
  display: none;
}

.qr-form input[type="text"],
.qr-form input[type="email"],
.qr-form input[type="tel"],
.qr-form textarea,
.qr-form select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.qr-form textarea {
  resize: vertical;
}

.qr-form input::placeholder,
.qr-form textarea::placeholder {
  color: #94a3b8;
}

.qr-form input:focus,
.qr-form textarea:focus,
.qr-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.qr-form input:disabled {
  background: var(--surface-soft);
  color: var(--text-muted);
}

.field-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.field-row select {
  flex: 1;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: nowrap;
  cursor: pointer;
}

.checkbox input {
  accent-color: var(--accent);
}

.primary-btn {
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  padding: 0.65rem 1.15rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.primary-btn:active {
  transform: scale(0.98);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error {
  color: #dc2626;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

.warning {
  color: #b45309;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

/* ---------- QR display ---------- */

.qr-container {
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  background: var(--surface-soft);
  border: 1.5px dashed #cbd5e1;
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.qr-container.has-qr {
  border-color: transparent;
  background: none;
}

.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: #94a3b8;
  font-size: 0.9rem;
}

#qr-image {
  max-width: 100%;
  max-height: 320px;
  border-radius: 10px;
  animation: pop-in 0.25s ease;
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ---------- actions ---------- */

.actions {
  display: flex;
  gap: 0.5rem;
}

.secondary-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--surface-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.secondary-btn svg {
  flex-shrink: 0;
}

.secondary-btn:hover:not(:disabled) {
  background: #eef2ff;
  border-color: #c7d2fe;
}

.secondary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.hidden {
  display: none !important;
}

/* ---------- settings dialog ---------- */

dialog {
  margin: auto;
  border: none;
  border-radius: 14px;
  box-shadow: 0 8px 40px rgba(15, 23, 42, 0.25);
  padding: 1.5rem;
  width: 90%;
  max-width: 360px;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(2px);
}

.settings-form h2 {
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin-bottom: 1.1rem;
}

.settings-form label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
  font-size: 0.9rem;
  color: var(--text);
}

.settings-form input[type="color"] {
  width: 44px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
  background: var(--surface);
  cursor: pointer;
}

.settings-form input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.settings-form select {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--surface);
}

.settings-form output {
  min-width: 1.5rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
}

.logo-row {
  flex-wrap: wrap;
}

.settings-form input[type="file"] {
  font-size: 0.82rem;
  color: var(--text-muted);
  max-width: 200px;
}

.hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.4rem 0;
}

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

.settings-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.settings-actions .primary-btn {
  margin-left: auto;
}