/* 계산도우미(계산기 서비스) 통합 CSS 스타일시트 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root {
  /* 색상 토큰 */
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --secondary: #14B8A6;
  --secondary-hover: #0F766E;
  --secondary-light: #F0FDFA;
  --accent: #F59E0B;
  --accent-hover: #D97706;
  --accent-light: #FEF3C7;
  
  --bg-main: #F8FAFC;
  --bg-card: #FFFFFF;
  --border-color: #E2E8F0;
  --border-focus: #93C5FD;
  
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #94A3B8;
  --bg-footer: #0F172A;
  --text-footer: #94A3B8;
  
  /* 상태 색상 */
  --danger: #EF4444;
  --danger-light: #FEF2F2;
  --success: #10B981;
  --success-light: #ECFDF5;
  
  /* 레이아웃/쉐도우 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  
  /* 트랜지션 */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.global-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  flex-shrink: 0;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

.logo svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.logo-accent {
  color: var(--secondary);
}

/* Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none;  /* IE/Edge */
}

.nav-menu::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.nav-link {
  padding: 8px 11px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  white-space: nowrap;
}

.nav-link:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-link.active {
  background-color: var(--primary);
  color: #FFFFFF;
}

/* Hamburger & Mobile Nav */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
}

.menu-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Breadcrumb */
.breadcrumb-container {
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-light);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--text-light);
}

/* Layout Elements */
main {
  min-height: calc(100vh - 70px - 250px);
}

/* Hero Section (Main Page) */
.hero-section {
  padding: 80px 0 60px;
  background: radial-gradient(circle at top right, var(--secondary-light) 0%, #FFFFFF 60%, var(--primary-light) 100%);
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero-subtitle {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-light);
  border-radius: 50px;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 42px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-title span {
  color: var(--primary);
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 32px;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

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

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.2);
}

.btn-outline {
  background-color: #FFFFFF;
  border-color: var(--border-color);
  color: var(--text-muted);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

.btn-reset {
  background-color: #F1F5F9;
  color: var(--text-muted);
}

.btn-reset:hover {
  background-color: #E2E8F0;
  color: var(--text-main);
}

.btn-full {
  width: 100%;
}

/* Home search/navigation cards */
.section-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
  position: relative;
  letter-spacing: -0.01em;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-top: -16px;
  margin-bottom: 40px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.calc-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: var(--transition);
}

.calc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-hover);
}

.calc-icon {
  font-size: 32px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: var(--primary-light);
  border-radius: var(--radius-sm);
}

.calc-card:nth-child(even) .calc-icon {
  background-color: var(--secondary-light);
}

.calc-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.calc-desc {
  font-size: 14px;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: 20px;
}

.calc-link-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.calc-link-text::after {
  content: "→";
  transition: var(--transition);
}

.calc-card:hover .calc-link-text::after {
  transform: translateX(4px);
}

/* Info Section (For general guides) */
.info-section {
  padding: 60px 0;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.step-item {
  text-align: center;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  margin: 0 auto 16px;
}

.step-title {
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--text-muted);
  padding: 0 16px;
}

/* Category Grid on Main Page */
.category-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.category-tab-btn {
  padding: 10px 20px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
}

.category-tab-btn.active, .category-tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

/* Calculator Details Layout */
.calculator-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  margin-bottom: 60px;
}

@media (max-width: 992px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-left: 4px solid var(--primary);
  padding-left: 10px;
}

/* Form inputs styling */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-main);
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.input-addon-right {
  position: absolute;
  right: 14px;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  pointer-events: none;
}

.form-control {
  width: 100%;
  height: 48px;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 16px;
  transition: var(--transition);
  background-color: #FFFFFF;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control.has-addon {
  padding-right: 48px;
}

.form-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.error-message {
  font-size: 12px;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

/* Radio & Checkbox buttons custom grid */
.option-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.custom-option {
  position: relative;
}

.custom-option input[type="radio"], .custom-option input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.custom-option .custom-option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0; /* form-group label의 margin-bottom 상쇄 */
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
  background-color: #FFFFFF;
}

.custom-option input:checked + .custom-option-label {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* Calculator Actions */
.calc-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

/* Results section */
.results-wrapper {
  display: none; /* Dynamically shown on calculate */
  animation: fadeIn 0.3s ease-out;
}

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

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  background-color: var(--primary-light);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.summary-card.accent {
  background-color: var(--accent-light);
  border-color: #FCD34D;
}

.summary-card-title {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
}

.summary-card-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Outfit', sans-serif;
}

.summary-card.accent .summary-card-val {
  color: var(--accent-hover);
}

/* Results Table */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

th {
  background-color: #F8FAFC;
  color: var(--text-muted);
  font-weight: 600;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

tr:last-child td {
  border-bottom: none;
}

tr.highlight-row {
  background-color: var(--bg-main);
  font-weight: 600;
}

.number-cell {
  text-align: right;
  font-family: 'Outfit', sans-serif;
}

/* Warning / Notice Box */
.notice-box {
  background-color: #F8FAFC;
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-muted);
}

.notice-box.info {
  border-left-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--text-muted);
}

.notice-title {
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-main);
}

/* FAQs Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: #FFFFFF;
}

.faq-question {
  width: 100%;
  padding: 16px 20px;
  text-align: left;
  background: none;
  border: none;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: var(--bg-main);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease-out;
  background-color: #FCFDFE;
  border-top: 1px solid transparent;
}

.faq-answer-content {
  padding: 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 500px; /* arbitrary height to slide down */
  border-top: 1px solid var(--border-color);
}

.faq-arrow {
  transition: var(--transition);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

/* Related Calculators Links */
.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.related-item {
  display: block;
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: #FFFFFF;
  transition: var(--transition);
}

.related-item:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  transform: translateY(-2px);
}

.related-name {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
  color: var(--text-main);
}

.related-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* Footer */
.global-footer {
  background-color: var(--bg-footer);
  color: var(--text-footer);
  padding: 60px 0 30px;
  font-size: 14px;
  border-top: 4px solid var(--primary);
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

.footer-brand h3 {
  color: #FFFFFF;
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-footer);
  margin-bottom: 16px;
  max-width: 350px;
}

.footer-links-title {
  color: #FFFFFF;
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 15px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-contact-item {
  margin-bottom: 10px;
}

.footer-contact-label {
  font-weight: 600;
  color: #FFFFFF;
  display: block;
}

.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-light);
  font-size: 13px;
}

/* static articles/documents style */
.document-article {
  max-width: 800px;
  margin: 40px auto 80px;
  background-color: #FFFFFF;
  padding: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.document-article h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--text-main);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 16px;
}

.document-article h2 {
  font-size: 22px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--text-main);
}

.document-article h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 12px;
}

.document-article p {
  margin-bottom: 16px;
  color: var(--text-muted);
}

.document-article ul, .document-article ol {
  margin-bottom: 20px;
  padding-left: 20px;
  color: var(--text-muted);
}

.document-article li {
  margin-bottom: 8px;
}

/* Contact form custom page styling */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

/* Mobile responsive menu */
@media (max-width: 1200px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
    box-shadow: var(--shadow);
    align-items: flex-start;
  }
  
  .nav-menu.open {
    display: flex;
  }
  
  .nav-link {
    width: 100%;
    padding: 10px 14px;
  }
  
  .hero-title {
    font-size: 30px;
  }
}