/* Aesabla — coastal data atelier */
@import url('https://fonts.googleapis.com/css2?family=Gowun+Dodum&family=Noto+Sans+KR:wght@400;500;700&display=swap');

:root {
  --ink: #152028;
  --ink-soft: #2a3a46;
  --sea: #1f7a6c;
  --sea-deep: #165a50;
  --sea-mist: #d4ebe6;
  --foam: #f0f5f7;
  --paper: #e6eef2;
  --sand: #c8d4dc;
  --amber: #b85a2e;
  --line: rgba(21, 32, 40, 0.12);
  --shadow: 0 18px 40px rgba(21, 32, 40, 0.08);
  --radius: 4px;
  --max: 1120px;
  --font-display: 'Gowun Dodum', serif;
  --font-body: 'Noto Sans KR', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(31, 122, 108, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(184, 90, 46, 0.06), transparent 50%),
    linear-gradient(180deg, var(--foam) 0%, var(--paper) 100%);
  background-attachment: fixed;
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: var(--sea-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.35;
  margin: 0 0 0.6em;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.45rem); }

p { margin: 0 0 1em; }

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

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(240, 245, 247, 0.88);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand span {
  color: var(--sea);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--foam);
  padding: 0.45rem 0.7rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--ink);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.15rem;
  align-items: center;
}

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

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

.nav-cta {
  background: var(--ink);
  color: var(--foam) !important;
  padding: 0.45rem 0.9rem;
  text-decoration: none !important;
  transition: background 0.25s ease, transform 0.25s ease;
}

.nav-cta:hover {
  background: var(--sea);
  transform: translateY(-1px);
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    background: var(--foam);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1.1rem;
    gap: 0.65rem;
  }
  .site-nav.is-open { display: flex; }
  .nav-cta { text-align: center; }
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none !important;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.btn-primary {
  background: var(--sea);
  color: #fff !important;
}

.btn-primary:hover {
  background: var(--sea-deep);
  color: #fff !important;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--ink) !important;
  border: 1px solid var(--ink);
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--foam) !important;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: min(92vh, 780px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #f5faf9;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroDrift 28s ease-in-out infinite alternate;
}

.hero-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(21, 32, 40, 0.82) 0%, rgba(21, 32, 40, 0.45) 48%, rgba(31, 122, 108, 0.25) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 5rem 0 4rem;
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  animation: riseIn 0.9s ease both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.5rem);
  line-height: 1.05;
  margin: 0 0 0.35em;
  letter-spacing: -0.04em;
}

.hero-line {
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  max-width: 28ch;
  margin: 0 0 1.5rem;
  opacity: 0.92;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@keyframes heroDrift {
  from { transform: scale(1.05) translate(0, 0); }
  to { transform: scale(1.12) translate(-2%, 1%); }
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  animation: fadeSlide 0.7s ease both;
}

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

.section-head {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.section-head p {
  color: var(--ink-soft);
}

.eyebrow {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sea);
  margin-bottom: 0.55rem;
  font-weight: 700;
}

.band {
  background: var(--ink);
  color: var(--foam);
  padding: 3.5rem 0;
}

.band a { color: var(--sea-mist); }
.band .btn-primary { background: var(--sea); }

.split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 840px) {
  .split { grid-template-columns: 1.05fr 0.95fr; }
  .split-reverse { direction: rtl; }
  .split-reverse > * { direction: ltr; }
}

.prose {
  max-width: 42rem;
}

.prose h2 { margin-top: 2rem; }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.45rem; }

/* —— Course / blog rows (not card clutter) —— */
.item-list {
  display: grid;
  gap: 2rem;
}

.item-row {
  display: grid;
  gap: 1.25rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

@media (min-width: 720px) {
  .item-row {
    grid-template-columns: 220px 1fr;
    gap: 1.75rem;
  }
}

.item-row img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  filter: saturate(0.92);
}

.item-meta {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 0.35rem;
}

.item-row h3 {
  margin-bottom: 0.4rem;
}

.item-row h3 a {
  color: var(--ink);
  text-decoration: none;
}

.item-row h3 a:hover {
  color: var(--sea);
}

/* —— Benefits —— */
.benefit-rail {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 780px) {
  .benefit-rail { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}

.benefit {
  padding-top: 1rem;
  border-top: 2px solid var(--sea);
}

.benefit h3 { margin-bottom: 0.4rem; }
.benefit p { color: var(--ink-soft); margin: 0; font-size: 0.95rem; }

/* —— Quotes —— */
.quote-stack {
  display: grid;
  gap: 1.75rem;
}

.quote {
  border-left: 3px solid var(--sea);
  padding: 0.25rem 0 0.25rem 1.25rem;
}

.quote p {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.65rem;
}

.quote footer {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* —— Pricing —— */
.price-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 800px) {
  .price-grid { grid-template-columns: repeat(3, 1fr); }
}

.price-tier {
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
}

.price-tier.featured {
  border-color: var(--sea);
  background: var(--sea-mist);
}

.price-tier h3 { margin-bottom: 0.25rem; }

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

.price-tier ul {
  padding-left: 1.1rem;
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.price-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 1.5rem;
}

/* —— Forms —— */
.form {
  display: grid;
  gap: 1rem;
  max-width: 34rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.form input,
.form select,
.form textarea {
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--sand);
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
}

.form textarea { min-height: 140px; resize: vertical; }

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--sea-mist);
  border-color: var(--sea);
}

.field-error {
  color: var(--amber);
  font-size: 0.82rem;
  font-weight: 400;
  display: none;
}

.field-error.is-visible { display: block; }

.form-status {
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  display: none;
}

.form-status.is-success {
  display: block;
  background: var(--sea-mist);
  color: var(--sea-deep);
}

.form-status.is-error {
  display: block;
  background: #f7e6de;
  color: var(--amber);
}

.inline-error {
  margin: 0.75rem 0;
  padding: 0.75rem 1rem;
  background: #f7e6de;
  color: var(--amber);
  font-size: 0.9rem;
  display: none;
}

.inline-error.is-visible { display: block; }

/* —— Contact —— */
.contact-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 820px) {
  .contact-grid { grid-template-columns: 1.1fr 0.9fr; }
}

.contact-aside {
  padding: 1.5rem 0;
  border-top: 2px solid var(--sea);
}

.contact-aside dt {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sea);
  margin-top: 1rem;
}

.contact-aside dd {
  margin: 0.25rem 0 0;
}

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

.faq summary {
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq details[open] summary { color: var(--sea); }

.faq details p {
  margin: 0.75rem 0 0.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* —— Modules —— */
.module-list {
  counter-reset: mod;
  list-style: none;
  padding: 0;
  margin: 0;
}

.module-list li {
  counter-increment: mod;
  padding: 1.1rem 0 1.1rem 3rem;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.module-list li::before {
  content: counter(mod, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.1rem;
  font-family: var(--font-display);
  color: var(--sea);
  font-size: 1.1rem;
}

/* —— Stats —— */
.stat-line {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 3rem;
  padding: 2rem 0;
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
}

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

.band .stat span { color: var(--sea-mist); }

/* —— Footer —— */
.site-footer {
  margin-top: 3rem;
  background: var(--ink);
  color: #c5d0d6;
  padding: 3rem 0 2rem;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 760px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}

.site-footer a {
  color: #dce6ea;
  text-decoration: none;
}

.site-footer a:hover { color: var(--sea-mist); }

.site-footer h3 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.82rem;
  color: #8a9aa3;
}

/* —— Cookie banner —— */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background: var(--ink);
  color: #e8eef2;
  padding: 1.15rem 0;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.2);
  transform: translateY(110%);
  transition: transform 0.35s ease;
}

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

.cookie-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.cookie-inner p {
  margin: 0;
  flex: 1 1 280px;
  font-size: 0.9rem;
  line-height: 1.55;
}

.cookie-inner a {
  color: var(--sea-mist);
}

.cookie-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.cookie-actions .btn {
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
}

.btn-reject {
  background: transparent;
  color: #e8eef2 !important;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn-reject:hover {
  border-color: #fff;
}

/* —— Tables —— */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1.25rem 0;
}

.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--sea-mist);
  font-weight: 500;
}

/* —— Page hero (inner) —— */
.page-hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  max-width: 18ch;
}

.page-hero p {
  max-width: 36rem;
  color: var(--ink-soft);
  margin: 0;
}

.page-hero-media {
  margin-top: 2rem;
  max-height: 320px;
  overflow: hidden;
}

.page-hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* —— Case study —— */
.case {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.case h3 { margin-bottom: 0.5rem; }

/* —— 404 —— */
.not-found {
  min-height: 70vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 3rem 1.25rem;
}

.not-found .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--sea);
  line-height: 1;
  margin: 0;
}

/* —— Misc —— */
.muted { color: var(--ink-soft); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--sea-deep);
  background: var(--sea-mist);
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.5rem;
}

.instructor {
  display: grid;
  gap: 1.25rem;
  align-items: center;
}

@media (min-width: 640px) {
  .instructor { grid-template-columns: 140px 1fr; }
}

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

.rating {
  color: var(--amber);
  letter-spacing: 0.05em;
}