/* Virtualization Edge — elegant luxury theme */
:root {
  --ink: #141820;
  --ink-soft: #2a3140;
  --muted: #5c6578;
  --line: rgba(20, 24, 32, 0.12);
  --paper: #f3f4f7;
  --paper-deep: #e6e8ee;
  --surface: #ffffff;
  --champagne: #b8956a;
  --champagne-deep: #8f7048;
  --champagne-soft: rgba(184, 149, 106, 0.14);
  --success: #2f6b4f;
  --danger: #8b3a3a;
  --radius: 2px;
  --shadow: 0 18px 50px rgba(20, 24, 32, 0.08);
  --font-display: "Noto Serif KR", "Song Myung", Georgia, serif;
  --font-body: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  --max: 1120px;
  --header-h: 76px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 8% -10%, rgba(184, 149, 106, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(42, 49, 64, 0.06), transparent 50%),
    linear-gradient(180deg, #f7f8fb 0%, var(--paper) 40%, #eef0f5 100%);
  line-height: 1.7;
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--champagne-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.25s var(--ease);
}

a:hover {
  color: var(--ink);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--ink);
}

p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(243, 244, 247, 0.86);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 1.35rem;
  height: 1.35rem;
  border: 1.5px solid var(--champagne);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-35deg);
  box-shadow: inset 0 0 0 3px rgba(184, 149, 106, 0.2);
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.nav-cta {
  padding: 0.55rem 1rem;
  border: 1px solid var(--ink);
  color: var(--ink) !important;
  background: transparent;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.nav-cta:hover {
  background: var(--ink);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.55rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  margin: 0.3rem 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.45rem;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: #f7f5f0;
}

.btn-primary:hover {
  background: var(--champagne-deep);
  color: #fff;
}

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--ink);
  color: #fff;
}

.btn-soft {
  background: var(--champagne-soft);
  color: var(--champagne-deep);
  border-color: transparent;
}

/* Hero variants */
.hero-editorial {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-editorial::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(20, 24, 32, 0.78) 18%, rgba(20, 24, 32, 0.35) 58%, rgba(20, 24, 32, 0.15) 100%),
    var(--hero-image) center / cover no-repeat;
  z-index: 0;
  animation: heroDrift 18s ease-in-out infinite alternate;
}

.hero-editorial .hero-content {
  position: relative;
  z-index: 1;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 5rem 0 4.5rem;
  color: #f5f2ea;
}

.hero-editorial .brand-signal {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 1.05;
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
  color: #f8f4ec;
  animation: riseIn 0.9s var(--ease) both;
}

.hero-editorial .hero-line {
  width: 4.5rem;
  height: 1px;
  background: var(--champagne);
  margin-bottom: 1.4rem;
  animation: riseIn 1s 0.1s var(--ease) both;
}

.hero-editorial .hero-lead {
  max-width: 34rem;
  font-size: 1.08rem;
  color: rgba(245, 242, 234, 0.88);
  margin-bottom: 2rem;
  animation: riseIn 1s 0.18s var(--ease) both;
}

.hero-editorial .hero-actions {
  animation: riseIn 1s 0.28s var(--ease) both;
}

.hero-editorial .btn-primary {
  background: var(--champagne);
  color: var(--ink);
}

.hero-editorial .btn-primary:hover {
  background: #d4b584;
}

.hero-editorial .btn-ghost {
  border-color: rgba(245, 242, 234, 0.55);
  color: #f5f2ea;
  margin-left: 0.75rem;
}

.hero-editorial .btn-ghost:hover {
  background: rgba(245, 242, 234, 0.12);
  color: #fff;
}

.page-hero {
  padding: 4.5rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  margin: 0 0 0.85rem;
}

.page-hero p {
  max-width: 40rem;
  font-size: 1.05rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--champagne-deep);
  margin-bottom: 0.85rem;
  font-weight: 600;
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-tight {
  padding: 3.25rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  margin: 0 0 0.75rem;
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.media-frame {
  overflow: hidden;
  position: relative;
  min-height: 320px;
  background: var(--paper-deep);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
  transition: transform 1.2s var(--ease);
}

.media-frame:hover img {
  transform: scale(1.04);
}

.quote-rail {
  background: var(--ink);
  color: #f4efe6;
  padding: 3.5rem 0;
}

.quote-rail blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  line-height: 1.55;
  max-width: 46rem;
  color: #f4efe6;
}

.quote-rail cite {
  display: block;
  margin-top: 1.25rem;
  font-style: normal;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: rgba(244, 239, 230, 0.7);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}

.feature-list li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--ink-soft);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 0.55rem;
  height: 0.55rem;
  border: 1px solid var(--champagne);
  transform: rotate(45deg);
}

.course-grid,
.card-grid,
.blog-grid,
.pricing-grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.pricing-grid {
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
}

.course-item,
.blog-item,
.price-tier,
.review-block,
.info-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.course-item,
.blog-item {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s var(--ease);
}

.course-item:hover,
.blog-item:hover {
  transform: translateY(-4px);
}

.course-item img,
.blog-item img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  width: 100%;
}

.course-body,
.blog-body,
.price-body,
.review-body,
.info-panel {
  padding: 1.35rem 1.4rem 1.55rem;
}

.course-body h3,
.blog-body h3,
.price-body h3 {
  margin: 0 0 0.55rem;
  font-size: 1.2rem;
}

.meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat {
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--champagne);
  background: rgba(255, 255, 255, 0.55);
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.85rem;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.stat span {
  font-size: 0.88rem;
  color: var(--muted);
}

.price-tier {
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.price-tier.featured {
  border-color: var(--champagne);
  background:
    linear-gradient(180deg, rgba(184, 149, 106, 0.1), transparent 40%),
    var(--surface);
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2rem;
  margin: 0.75rem 0 1rem;
  color: var(--ink);
}

.price-amount small {
  font-size: 0.95rem;
  color: var(--muted);
  font-family: var(--font-body);
}

.price-tier ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  flex: 1;
}

.price-tier li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.review-block {
  padding: 1.5rem;
}

.review-block.wide {
  grid-column: 1 / -1;
}

.stars {
  color: var(--champagne-deep);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

.review-attr {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.modules {
  display: grid;
  gap: 0.85rem;
}

.module {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-num {
  font-family: var(--font-display);
  color: var(--champagne-deep);
  font-size: 1.2rem;
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
}

.faq details p {
  margin-top: 0.75rem;
}

.instructor {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
}

.instructor img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
}

/* Forms */
.form {
  display: grid;
  gap: 1rem;
  max-width: 36rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  background: var(--surface);
  font: inherit;
  color: var(--ink);
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid rgba(184, 149, 106, 0.45);
  border-color: var(--champagne);
}

.field-error {
  color: var(--danger);
  font-size: 0.84rem;
  min-height: 1.1em;
}

.form-status {
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  display: none;
}

.form-status.success {
  display: block;
  border-color: var(--success);
  color: var(--success);
  background: rgba(47, 107, 79, 0.08);
}

.form-status.error {
  display: block;
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(139, 58, 58, 0.08);
}

.inline-error {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--danger);
  color: var(--danger);
  background: rgba(139, 58, 58, 0.06);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
}

.legal-content {
  max-width: 46rem;
}

.legal-content h2 {
  margin-top: 2.25rem;
  font-size: 1.35rem;
}

.legal-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.legal-content th,
.legal-content td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.legal-content th {
  background: rgba(255, 255, 255, 0.7);
}

.not-found {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1.25rem;
}

.not-found h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  margin: 0;
  color: var(--champagne-deep);
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 200;
  max-width: 420px;
  margin-left: auto;
  background: var(--ink);
  color: #f4efe6;
  padding: 1.25rem 1.3rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  transform: translateY(120%);
  opacity: 0;
  transition: transform 0.45s var(--ease), opacity 0.45s var(--ease);
}

.cookie-banner.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.cookie-banner p {
  color: rgba(244, 239, 230, 0.85);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.cookie-banner a {
  color: var(--champagne);
}

.cookie-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.cookie-actions button {
  border: 1px solid rgba(244, 239, 230, 0.35);
  background: transparent;
  color: #f4efe6;
  padding: 0.55rem 0.95rem;
  font: inherit;
  cursor: pointer;
}

.cookie-actions .accept {
  background: var(--champagne);
  border-color: var(--champagne);
  color: var(--ink);
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroDrift {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.05);
  }
}

/* Footer */
.site-footer {
  margin-top: 3rem;
  background: var(--ink);
  color: rgba(244, 239, 230, 0.78);
  padding: 3.5rem 0 2rem;
}

.footer-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #f4efe6;
  margin: 0 0 0.4rem;
}

.footer-tagline {
  color: rgba(244, 239, 230, 0.65);
  margin-bottom: 2rem;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.footer-col h3 {
  color: #f4efe6;
  font-size: 0.95rem;
  margin: 0 0 0.85rem;
}

.footer-col a,
.footer-col p {
  display: block;
  color: rgba(244, 239, 230, 0.7);
  text-decoration: none;
  margin: 0 0 0.45rem;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--champagne);
}

.footer-legal {
  border-top: 1px solid rgba(244, 239, 230, 0.12);
  padding-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.footer-legal-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-legal a {
  color: rgba(244, 239, 230, 0.7);
  text-decoration: none;
}

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

/* Responsive */
@media (max-width: 960px) {
  .course-grid,
  .blog-grid,
  .pricing-grid,
  .stat-row,
  .footer-cols,
  .split,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .instructor {
    grid-template-columns: 1fr;
  }

  .hero-editorial .btn-ghost {
    margin-left: 0;
    margin-top: 0.65rem;
  }

  .hero-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(247, 248, 251, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1.25rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }
}