:root {
  --navy: #1a3c6c;
  --navy-dark: #142f54;
  --accent: #28506f;
  --accent-border: #1d66a0;
  --btn-gray: #d9d9d9;
  --btn-gray-hover: #c8c8c8;
  --bg: #ededed;
  --surface: #ffffff;
  --text: #333333;
  --muted: #666666;
  --border: #d0d0d0;
  --success: #1a6b42;
  --warning: #8a5a12;
  --danger: #9b1c1c;
  --radius: 4px;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  --font-heading: 'Raleway', Georgia, serif;
  --font-body: 'Open Sans', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* Header */
.site-header {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: #fff;
  padding: 0.65rem 1.5rem;
  text-align: center;
  isolation: isolate;
  overflow: hidden;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.header-brand {
  display: inline-block;
  line-height: 0;
  margin-bottom: 0.15rem;
}

.header-logo {
  display: block;
  height: 28px;
  width: auto;
}

.eyebrow {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.8;
}

.site-header h1 {
  margin: 0.25rem 0 0;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  font-weight: 300;
  opacity: 0.85;
}

/* Main layout */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem;
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1rem;
  align-items: start;
}

.content-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .site-header h1 {
    font-size: 1.1rem;
  }

  .header-logo {
    height: 24px;
  }

  .eyebrow {
    font-size: 0.65rem;
  }
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.card h2 {
  margin: 0 0 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-border);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
}

/* Form fields */
.field {
  margin-bottom: 0.6rem;
}

.field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.field input,
.field select {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text);
  background: var(--surface);
}

.field select {
  appearance: none;
  padding-right: 1.75rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666666' d='M2.5 4.5 6 8l3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.55rem center;
  background-size: 12px;
}

.field select:focus,
.field input:focus {
  outline: 2px solid rgba(29, 102, 160, 0.2);
  border-color: var(--accent-border);
}

#lens-preset {
  font-size: 0.8rem;
  line-height: 1.35;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.4rem;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--accent-border);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: var(--surface);
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(29, 102, 160, 0.06);
}

.dropzone p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.dropzone strong {
  color: var(--accent);
  font-weight: 600;
}

#file-input {
  display: none;
}

/* Preview badges */
.preview-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-info {
  background: rgba(26, 60, 108, 0.1);
  color: var(--navy);
}

.badge-warn {
  background: rgba(138, 90, 18, 0.12);
  color: var(--warning);
}

.badge-error {
  background: rgba(155, 28, 28, 0.1);
  color: var(--danger);
}

/* Buttons */
.toolbar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

button {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--btn-gray);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.btn-primary:hover:not(:disabled) {
  background: var(--btn-gray-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

#settings-panel .btn-secondary {
  width: 100%;
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(29, 102, 160, 0.06);
}

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

/* Table */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

th,
td {
  padding: 0.4rem 0.55rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  background: #f5f5f5;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  position: sticky;
  top: 0;
}

tr:hover td {
  background: rgba(29, 102, 160, 0.04);
}

.toric-yes {
  color: var(--success);
  font-weight: 700;
}

.toric-no {
  color: var(--muted);
}

.kane-cell {
  font-weight: 600;
  color: var(--accent);
}

.warnings-cell {
  white-space: normal;
  max-width: 320px;
  min-width: 180px;
  font-size: 0.72rem;
  line-height: 1.35;
}

.warnings-cell .raw-k {
  color: var(--muted);
  display: block;
}

.warnings-cell .warn-text {
  color: var(--warning);
  display: block;
  margin-top: 0.25rem;
}

.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  color: var(--accent);
  font-weight: 400;
}

.loading-spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

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

/* Footer */
.site-footer {
  text-align: center;
  padding: 1rem 1.5rem;
  font-size: 0.75rem;
  color: var(--muted);
  background: #e8e8e8;
  border-top: 1px solid var(--border);
}

/* Parse errors */
#parse-errors {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

#parse-errors li {
  font-size: 0.8rem;
  color: var(--warning);
  margin-bottom: 0.2rem;
}