/* Pretendard Font */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.min.css');

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Design Tokens */
:root {
  --color-bg: #F0F4FF;
  --color-bg-gradient: linear-gradient(135deg, #E8EFFF 0%, #F0E6FF 100%);
  --color-primary: #4285F4;
  --color-primary-hover: #3367D6;
  --color-text: #3C4043;
  --color-text-light: #5F6368;
  --color-success: #34A853;
  --color-card-bg: rgba(255, 255, 255, 0.95);
  --color-input-border: #E0E0E0;
  --color-input-focus: #4285F4;

  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-button: 0 2px 8px rgba(66, 133, 244, 0.3);
  --shadow-button-hover: 0 6px 16px rgba(66, 133, 244, 0.4);
  --shadow-input-focus: 0 0 0 3px rgba(66, 133, 244, 0.1);

  --radius-card: 16px;
  --radius-input: 8px;

  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 40px;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  background-image: var(--color-bg-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  padding: var(--spacing-sm) 0;
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

/* Main Content */
main {
  padding: var(--spacing-lg) 0;
}

.calculator-section > h1 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.intro-text {
  text-align: center;
  color: var(--color-text-light);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

/* Calculator Card */
.calculator-card {
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
}

.input-group {
  margin-bottom: var(--spacing-sm);
}

.input-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.input-label-text {
  margin-right: 4px;
}

.unit-text {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-light);
}

/* Tooltip */
.tooltip-wrap {
  position: relative;
  display: inline-block;
  margin-left: 4px;
  vertical-align: middle;
}

.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-input-border);
  color: var(--color-text-light);
  font-size: 11px;
  font-weight: 700;
  cursor: help;
  transition: background 0.2s;
}

.tooltip-icon:hover {
  background: var(--color-primary);
  color: white;
}

.tooltip-text {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  padding: 10px 12px;
  background: var(--color-text);
  color: white;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 10;
}

.tooltip-text::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-text);
}

.tooltip-wrap:hover .tooltip-text {
  display: block;
}

/* Salary Toggle */
.salary-toggle {
  display: flex;
  gap: var(--spacing-xs);
}

.toggle-btn {
  flex: 1;
  padding: 12px;
  border: 2px solid var(--color-input-border);
  background: white;
  border-radius: var(--radius-input);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all 0.3s;
}

.toggle-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-button);
}

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

/* Input & Select */
input[type="text"],
select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-input-border);
  border-radius: var(--radius-input);
  font-size: 16px;
  font-family: inherit;
  color: var(--color-text);
  background: white;
  transition: all 0.3s;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-input-focus);
  box-shadow: var(--shadow-input-focus);
}

input[type="text"]::placeholder {
  color: #BDBDBD;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235F6368' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* Calculate Button */
.calc-btn {
  width: 100%;
  padding: 14px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-input);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-button);
  transition: all 0.3s;
  margin-top: var(--spacing-xs);
}

.calc-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-button-hover);
}

.calc-btn:active {
  transform: translateY(0);
}

/* Result Card */
.result-card {
  display: none;
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.result-card.show {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.net-salary-display {
  text-align: center;
  padding: var(--spacing-md) 0;
  border-bottom: 2px solid #F5F5F5;
  margin-bottom: var(--spacing-md);
}

.result-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.net-salary {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-success);
  line-height: 1.2;
}

.monthly-salary-info {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}

.monthly-salary-info span {
  font-weight: 600;
  color: var(--color-text);
}

/* Page Card (about, privacy, contact) */
.page-card {
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.page-card h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.page-card h2 {
  font-size: 18px;
  font-weight: 600;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.page-card p,
.page-card li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
}

.page-card ul {
  padding-left: 20px;
  margin-bottom: var(--spacing-sm);
}

/* Deduction Table */
.deduction-table-wrapper h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.deduction-table {
  width: 100%;
  border-collapse: collapse;
}

.deduction-table tbody tr {
  border-bottom: 1px solid #F5F5F5;
}

.deduction-table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

.deduction-table td {
  padding: 12px 0;
  font-size: 14px;
}

.deduction-table td:first-child {
  color: var(--color-text-light);
}

.deduction-table td.amount {
  text-align: right;
  font-weight: 600;
  color: var(--color-text);
}

.deduction-table .total-row {
  border-top: 2px solid var(--color-text);
  font-weight: 600;
}

.deduction-table .total-row td {
  padding: 14px 0;
  color: var(--color-text);
}

/* Info Section */
.info-section {
  margin-top: var(--spacing-xl);
}

.info-card {
  background: var(--color-card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.info-card h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.info-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* Info Table */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-sm);
}

.info-table thead {
  background: rgba(66, 133, 244, 0.08);
}

.info-table th {
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  border-bottom: 2px solid var(--color-primary);
}

.info-table td {
  padding: 12px;
  font-size: 14px;
  color: var(--color-text-light);
  border-bottom: 1px solid #F5F5F5;
}

.info-table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

.info-table tbody tr:hover {
  background: rgba(66, 133, 244, 0.04);
}

/* Footer */
footer {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-md) 0;
  text-align: center;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.copyright {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--color-text-light);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--color-primary);
}

.footer-nav .separator {
  color: #E0E0E0;
}

/* Salary Table Section */
.salary-table-section {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.table-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.table-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.salary-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -24px;
  padding: 0 24px;
}

.salary-table {
  width: 100%;
  min-width: 800px;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}

.salary-table thead {
  background: var(--color-primary);
  color: white;
  position: sticky;
  top: 0;
}

.salary-table th {
  padding: 10px 8px;
  font-weight: 600;
  text-align: right;
  font-size: 12px;
}

.salary-table th:first-child {
  text-align: center;
}

.salary-table th.highlight {
  background: var(--color-success);
}

.salary-table td {
  padding: 8px;
  text-align: right;
  border-bottom: 1px solid #F0F0F0;
  color: var(--color-text-light);
  font-variant-numeric: tabular-nums;
}

.salary-table td.col-salary {
  text-align: center;
  font-weight: 600;
  color: var(--color-text);
  background: rgba(66, 133, 244, 0.04);
}

.salary-table td.col-net {
  font-weight: 700;
  color: var(--color-success);
  background: rgba(52, 168, 83, 0.06);
}

.salary-table tbody tr:hover {
  background: rgba(66, 133, 244, 0.06);
}

.salary-table tbody tr:nth-child(10n) {
  border-bottom: 2px solid var(--color-primary);
}

/* Sub-page header */
header > .container > h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

header > .container > h1 a {
  color: inherit;
  text-decoration: none;
}

/* Responsive */
@media (min-width: 768px) {
  .calculator-card,
  .info-card {
    padding: var(--spacing-lg);
  }

  .calculator-section > h1 {
    font-size: 32px;
  }

  .intro-text {
    font-size: 15px;
  }

  .net-salary {
    font-size: 48px;
  }

  main {
    padding: var(--spacing-xl) 0;
  }
}

@media (max-width: 480px) {
  .net-salary {
    font-size: 32px;
  }
}