/**
 * NobleAIWork Layout CSS
 * 레이아웃 및 그리드 시스템
 * Created: 2025-01-24
 */

/* ========================================
   Import Variables
   ======================================== */
@import url('./variables.css');

/* ========================================
   Layout Structure
   ======================================== */
#page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding-top: var(--header-height);
}

/* ========================================
   Container System
   ======================================== */
.container {
  width: 100%;
  max-width: 1320px;  /* 최대 넓이 통일 */
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 30px;
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 40px;
  }
}

.container-xs {
  max-width: var(--container-xs);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-xl {
  max-width: var(--container-xl);
}

.container-2xl {
  max-width: var(--container-2xl);
}

.container-fluid {
  max-width: 100%;
}

/* ========================================
   Header Layout
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  height: var(--header-height);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-wrapper {
  height: 100%;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--spacing-xl);
}

/* Logo */
.header-logo {
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.logo-image {
  height: 48px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-main {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--noble-navy);
  font-family: var(--font-heading);
}

.logo-sub {
  font-size: var(--font-size-xs);
  color: var(--noble-gray-600);
}

/* Main Navigation */
.main-navigation {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xxs);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--nav-link-color);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link.active {
  color: var(--noble-navy);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--noble-gold);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: calc(100% - var(--spacing-xl));
}

/* Dropdown Arrow */
.dropdown-arrow {
  transition: transform var(--transition-fast);
}

.nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--noble-white);
  border: 1px solid var(--noble-gray-100);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  min-width: 240px;
  padding: var(--spacing-sm);
}

.dropdown-menu.dropdown-wide {
  min-width: 480px;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-inner {
  display: flex;
  gap: var(--spacing-lg);
}

.dropdown-column {
  flex: 1;
}

.dropdown-heading {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--noble-gray-500);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
}

.dropdown-link {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  color: var(--noble-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background: var(--noble-light-gray);
  color: var(--noble-navy);
}

.dropdown-link.featured {
  background: linear-gradient(135deg, var(--noble-navy) 0%, var(--ai-blue) 100%);
  color: var(--noble-white);
  margin-bottom: var(--spacing-xs);
}

.dropdown-link.featured:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.dropdown-link.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.dropdown-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--noble-light-gray);
  border-radius: var(--radius-md);
  color: var(--ai-blue);
}

.dropdown-link.featured .dropdown-icon {
  background: rgba(255, 255, 255, 0.2);
  color: var(--noble-white);
}

.dropdown-title {
  display: block;
  font-weight: var(--font-weight-semibold);
  margin-bottom: 2px;
}

.dropdown-desc {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--noble-gray-500);
}

.dropdown-link.featured .dropdown-desc {
  color: rgba(255, 255, 255, 0.9);
}

.badge-coming {
  display: inline-block;
  padding: 2px 6px;
  background: var(--noble-gold);
  color: var(--noble-white);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  margin-top: var(--spacing-xxs);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.btn-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--noble-navy);
  color: var(--noble-white);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.btn-cta:hover {
  background: var(--noble-navy-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--noble-navy);
  margin: 3px 0;
  transition: all var(--transition-base);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.mobile-navigation {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--noble-white);
  z-index: var(--z-dropdown);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.mobile-navigation[aria-hidden="false"] {
  transform: translateX(0);
}

.mobile-nav-inner {
  padding: var(--spacing-lg);
}

.mobile-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-menu-item {
  border-bottom: 1px solid var(--noble-gray-100);
}

.mobile-menu-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  color: var(--noble-gray-800);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
}

.mobile-submenu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0 0 var(--spacing-md) var(--spacing-lg);
}

.mobile-menu-item.active .mobile-submenu {
  display: block;
}

.mobile-submenu a {
  display: block;
  padding: var(--spacing-xs) 0;
  color: var(--noble-gray-600);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.mobile-submenu a.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.mobile-cta {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--noble-gray-100);
}

.btn-mobile-cta {
  display: block;
  width: 100%;
  padding: var(--spacing-md);
  background: var(--noble-navy);
  color: var(--noble-white);
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
}

/* ========================================
   Footer Layout
   ======================================== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  margin-top: var(--spacing-5xl);
}

.footer-main {
  padding: var(--spacing-3xl) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: var(--spacing-2xl);
}

.footer-company {
  padding-right: var(--spacing-xl);
}

.footer-logo {
  margin-bottom: var(--spacing-lg);
}

.footer-logo img {
  height: 80px;
  width: auto;
}

.footer-tagline {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
  color: var(--noble-gray-300);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.contact-item .icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--noble-gold);
  margin-top: 2px;
}

.contact-item a {
  color: var(--footer-link);
  text-decoration: none;
}

.contact-item a:hover {
  color: var(--footer-link-hover);
}

.footer-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--noble-white);
  margin-bottom: var(--spacing-lg);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--footer-link);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--footer-link-hover);
}

.footer-links .disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.badge-new {
  display: inline-block;
  padding: 2px 6px;
  background: var(--color-danger);
  color: var(--noble-white);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  margin-left: var(--spacing-xs);
}

.footer-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.btn-footer {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  color: var(--noble-white);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-footer:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-footer.btn-primary {
  background: var(--noble-gold);
  border-color: var(--noble-gold);
  color: var(--noble-navy);
  font-weight: var(--font-weight-semibold);
}

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

.social-links {
  margin-top: var(--spacing-xl);
}

.social-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--noble-gray-400);
  margin-bottom: var(--spacing-sm);
}

.social-icons {
  display: flex;
  gap: var(--spacing-sm);
}

.social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--noble-gray-400);
  transition: all var(--transition-fast);
}

.social-icons a:hover {
  background: var(--noble-gold);
  color: var(--noble-navy);
  transform: translateY(-2px);
}

/* Footer Bottom */
.footer-bottom {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--spacing-lg) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright p {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--noble-gray-400);
}

.company-info {
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-xxs);
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-legal a {
  color: var(--noble-gray-400);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--noble-gold);
}

.footer-legal .divider {
  color: var(--noble-gray-600);
}

/* ========================================
   Quick Actions (Floating)
   ======================================== */
.quick-actions {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: var(--z-fixed);
}

.quick-action {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--noble-white);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  color: var(--noble-navy);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
}

.quick-action:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.quick-action.phone-call {
  background: var(--noble-gold);
  color: var(--noble-navy);
}

.quick-action.scroll-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.quick-action.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ========================================
   Page Sections
   ======================================== */
.section {
  padding: var(--spacing-4xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

.section-lg {
  padding: var(--spacing-5xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--noble-navy);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--noble-gray-600);
  line-height: var(--line-height-relaxed);
  max-width: 800px;
  margin: 0 auto;
}

/* ========================================
   Grid System
   ======================================== */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-cols-5 {
  grid-template-columns: repeat(5, 1fr);
}

.grid-cols-6 {
  grid-template-columns: repeat(6, 1fr);
}

/* ========================================
   Flexbox Utilities
   ======================================== */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.gap-xs {
  gap: var(--spacing-xs);
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.gap-xl {
  gap: var(--spacing-xl);
}

/* ========================================
   Spacing Utilities
   ======================================== */
.mt-auto { margin-top: auto; }
.mr-auto { margin-right: auto; }
.mb-auto { margin-bottom: auto; }
.ml-auto { margin-left: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

/* ========================================
   Display Utilities
   ======================================== */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ========================================
   Text Utilities
   ======================================== */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* ========================================
   Loading Overlay
   ======================================== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-maximum);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 60px;
  height: 60px;
}

.spinner {
  width: 100%;
  height: 100%;
  border: 4px solid var(--noble-gray-200);
  border-top-color: var(--noble-navy);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ========================================
   Breadcrumb Navigation
   ======================================== */
.breadcrumb-nav {
  background: var(--noble-light-gray);
  padding: var(--spacing-sm) 0;
  margin-top: var(--header-height);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item::after {
  content: '/';
  margin: 0 var(--spacing-sm);
  color: var(--noble-gray-400);
}

.breadcrumb-item:last-child::after {
  display: none;
}

.breadcrumb-item a {
  color: var(--noble-gray-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb-item.active {
  color: var(--noble-gray-800);
  font-weight: var(--font-weight-medium);
}

/* ========================================
   Skip Navigation (Accessibility)
   ======================================== */
.skip-nav {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--noble-navy);
  color: var(--noble-white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: var(--z-maximum);
  border-radius: var(--radius-md);
}

.skip-nav:focus {
  top: var(--spacing-sm);
}

/* ========================================
   Noscript Message
   ======================================== */
.noscript-message {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-warning);
  color: var(--noble-dark);
  text-align: center;
  padding: var(--spacing-md);
  z-index: var(--z-maximum);
}