:root {
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --primary: #2563eb;
  --success: #10b981;
  --error: #ef4444;
  --warning: #d97706;
  --accent: #7c3aed;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
    Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  margin: 0;
  padding: 20px;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.container {
  max-width: 850px;
  margin: 0 auto;
}

header {
  margin-bottom: 2rem;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  color: #0f172a;
}

header p {
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Input Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

.input-group {
  margin-bottom: 1.25rem;
}

.input-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 1rem;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.2s;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Results Trace */
.trace-list {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.trace-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.2s;
}

.trace-item:last-child {
  border-bottom: none;
}

.trace-item:hover {
  background-color: #f1f5f9;
}

.syntax-raw {
  font-family: monospace;
  font-weight: bold;
  font-size: 1.1rem;
}

.type-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 0.25rem;

  strong {
    background: #d1fae5;
    border-radius: 2px;
    padding: 2px;
    border: 1px solid var(--success);
    display: inline-block;
    color: black;
  }
}

.match-status {
  font-size: 0.875rem;
  font-weight: bold;
  text-transform: uppercase;
}

/* Syntax Colors */
.text-alt {
  color: var(--warning);
}
.text-opt {
  color: var(--primary);
}
.text-perm {
  color: var(--accent);
}
.text-slot {
  color: var(--success);
}
.text-rule {
  color: var(--error);
}

/* Match Colors */
.status-matched {
  color: var(--success);
}
.status-skipped {
  color: var(--text-muted);
}
.status-fail {
  color: var(--error);
}

/* Legend */
.legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 2rem;
}

.legend-item {
  font-size: 0.75rem;
  padding: 8px;
  border-radius: 6px;
  font-family: monospace;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.legend-item dt {
  font-weight: bold;
  margin: 0;
}

.legend-item dd {
  margin: 0;
  font-size: 0.7rem;
}

.legend-alt {
  background: #fef3c7;
  color: #92400e;
}
.legend-opt {
  background: #dbeafe;
  color: #1e40af;
}
.legend-perm {
  background: #ede9fe;
  color: #5b21b6;
}
.legend-slot {
  background: #d1fae5;
  color: #065f46;
}
.legend-rule {
  background: #fee2e2;
  color: #991b1b;
}

footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

footer a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}

.template-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.template-header-row h2 {
  margin: 0;
}

.template-entry {
  margin-bottom: 1rem;
  padding: 1rem;
  background: #f8fafc;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.template-entry:last-child {
  margin-bottom: 0;
}

.template-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.template-number-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.template-number-link:hover {
  opacity: 0.7;
}

.template-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-pill {
  font-size: 0.65rem;
  font-weight: bold;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.status-pill.success {
  background: #d1fae5;
  color: #065f46;
}

.status-pill.fail {
  background: #fee2e2;
  color: #991b1b;
}

.btn-remove {
  background: transparent;
  border: 1px solid var(--error);
  color: var(--error);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-remove:hover {
  background: var(--error);
  color: white;
}

.btn-add {
  background: var(--primary);
  border: none;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-add:hover {
  background: #1d4ed8;
}

.trace-section {
  margin-bottom: 2rem;
  scroll-margin-top: 1rem;
}

.trace-section:last-child {
  margin-bottom: 0;
}

.trace-header {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px 12px 0 0;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.trace-template-display {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 500;
}

.trace-overall-status {
  font-size: 0.875rem;
  font-weight: bold;
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
}

.overall-success {
  background: #d1fae5;
  color: #065f46;
}

.overall-fail {
  background: #fee2e2;
  color: #991b1b;
}

.trace-section .trace-list {
  border-radius: 0 0 12px 12px;
  border-top: none;
}

@media (max-width: 600px) {
  .trace-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .match-status {
    margin-top: 0.5rem;
  }
  .trace-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}