:root {
  --primary-color: #4285f4;
  --secondary-color: #34a853;
  --border-color: #ddd;
  --light-gray: #f8f9fa;
  --dark-gray: #70757a;
  --error-color: #d93025;
  --success-color: #0f9d58;
}

* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #f1f2f3;
}

.container {
  box-sizing: border-box;
  max-width: 1400px;
  margin: 20px auto;
  color: #333;
  line-height: 1.6;
}

.container *{
  box-sizing: border-box;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 5px;
}

.subtitle {
  font-size: 1rem;
  color: var(--dark-gray);
  max-width: 95%;
  margin: 0 auto;
}

.calculator-section {
  background: white;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.input-group {
  margin-bottom: 10px;
}

.container label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 1.1rem;
}

.container input,
.container select,
.container textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.container input:focus,
.container select:focus,
.container textarea:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.container textarea {
  min-height: 180px;
  font-family: monospace;
  resize: vertical;
  line-height: 1.5;
}

.input-row {
  display: flex;
  gap: 20px;
  margin-bottom: 15px;
}

.input-row>div {
  flex: 1;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 5px;
}

.checkbox-group input {
  width: auto;
}

.checkbox-group  label{
  margin-bottom: 0;
}

.file-input {
  display: flex;
  gap: 15px;
  align-items: center;
}

.file-input input[type="file"] {
  flex: 1;
  padding: 8px 10px;
}

.btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 500;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 150px;
}

.btn:hover {
  background: #3367d6;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
  background: var(--secondary-color);
}

.btn-secondary:hover {
  background: #2d9248;
}

.action-buttons {
  display: flex;
  gap: 20px;
  margin: 30px 0;
}

.result-container {
  background: var(--light-gray);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 25px;
  margin-top: 20px;
  transition: all 0.3s;
}

.result-container.error {
  border-color: var(--error-color);
  background: #fce8e6;
}

.result-title {
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark-gray);
  font-size: 1.2rem;
}

.result-value {
  font-size: 2rem;
  font-family: monospace;
  color: var(--primary-color);
  word-break: break-all;
  font-weight: bold;
}

.result-value.error {
  color: var(--error-color);
}

.info-box {
  background: #e8f0fe;
  border-left: 4px solid var(--primary-color);
  padding: 20px;
  margin: 20px 0;
  margin-bottom: 10px;
  border-radius: 0 8px 8px 0;
  font-size: 1.05rem;
}

.info-box p {
  margin-bottom: 5px;
}

.info-box strong {
  color: var(--primary-color);
}

.reference-section {
  background: white;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
  margin-top: 20px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
  min-width: 1200px;
}

th,
td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--light-gray);
  font-weight: 600;
  position: sticky;
  top: 0;
}

td{
  font-size: 13px;
  color: #666;
}

tr:hover {
  background-color: rgba(66, 133, 244, 0.05);
}

.custom-params {
  background: #f9f9f9;
  padding: 25px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-top: 15px;
}

.note {
  font-size: 0.95rem;
  color: var(--dark-gray);
  margin-top: 8px;
  font-style: italic;
}

footer {
  text-align: center;
  padding: 25px;
  color: var(--dark-gray);
  font-size: 1rem;
}

.algorithm-info {
  font-family: monospace;
  background: var(--light-gray);
  padding: 12px;
  border-radius: 6px;
  margin-top: 10px;
  font-size: 1rem;
  border: 1px solid var(--border-color);
}

.file-info {
  margin-top: 10px;
  padding: 10px;
  background: var(--light-gray);
  border-radius: 6px;
  font-size: 0.95rem;
}

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, .3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
  margin-right: 10px;
}

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.tab {
  padding: 12px 24px;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  font-weight: 500;
}

.tab.active {
  border-bottom: 3px solid var(--primary-color);
  color: var(--primary-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 15px;
  font-size: 0.95rem;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--success-color);
}

.status-dot.error {
  background: var(--error-color);
}

.result-group {
  margin-top: 10px;
}

.result-row {
  display: flex;
  align-items: baseline;
  margin-bottom: 8px;
}

.result-label {
  font-weight: 600;
  min-width: 90px;
  color: var(--dark-gray);
}

.result-value {
  font-family: monospace;
  word-break: break-all;
  font-size: 1rem;
  color: var(--primary-color);
  font-weight: bold;
}

.result-value.error {
  color: var(--error-color);
}