/* ===== CSS RESET / NORMALIZE ===== */
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
  box-sizing: border-box;
}
html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section {
  display: block;
}
body {
  line-height: 1.5;
  background: #f5f6fa;
  min-height: 100vh;
  font-family: 'Noto Sans KR', 'Nanum Gothic', Arial, Helvetica, sans-serif;
  color: #1A2636;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4,h5,h6 {
  font-family: 'Nanum Gothic', 'Noto Sans KR', Arial, Helvetica, sans-serif;
  color: #23496E;
  font-weight: 700;
}
ul,ol {
  list-style: none;
  padding-left: 0;
}
a {
  text-decoration: none;
  color: #23496E;
  transition: color 0.2s;
}
a:hover, a:focus {
  color: #AED581;
  outline: none;
}
img {
  max-width: 100%;
  height: auto;
  border: none;
  display: block;
}
button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  padding: 0;
  margin: 0;
}
*, *:before, *:after {
  box-sizing: inherit;
}

/* ===== BRAND COLORS AND VARIABLES ===== */
:root {
  --color-primary: #23496E;
  --color-secondary: #AED581;
  --color-accent: #F6E7DB;
  --color-bg: #f5f6fa;
  --color-gray: #E2E8F0;
  --color-text-dark: #1A2636;
  --color-text: #23496E;
  --color-link: #23496E;
  --color-link-hover: #AED581;
  --color-footer-bg: #222C35;
  --color-footer-text: #E2E8F0;
  --shadow-card: 0 2px 12px rgba(35,73,110,0.09);
  --shadow-modal: 0 8px 32px rgba(35,73,110,0.16);
  --border-radius: 14px;
  --font-display: 'Nanum Gothic', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
}

body {
  font-size: 16px;
  background: var(--color-bg);
  color: var(--color-text-dark);
  font-family: var(--font-body), Arial, Helvetica, sans-serif;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

/* ===== HEADER ===== */
header {
  background: #fff;
  box-shadow: 0 2px 16px rgba(35,73,110,0.08);
  position: relative;
  z-index: 50;
}
header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 74px;
}
header a img {
  height: 45px;
  width: auto;
}
.main-nav {
  display: flex;
  gap: 24px;
  align-items: center;
  font-weight: 500;
  font-size: 17px;
}
.main-nav a {
  color: var(--color-text);
  padding: 8px 0;
  position: relative;
  transition: color 0.18s;
}
.main-nav a:hover, .main-nav a:focus {
  color: var(--color-secondary);
}
.cta-btn {
  padding: 11px 28px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 26px;
  font-size: 17px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background 0.22s, box-shadow 0.22s, color 0.2s;
  box-shadow: 0 2px 8px rgba(35,73,110,0.11);
  border: none;
  margin-left: 24px;
  display: inline-block;
}
.cta-btn:hover, .cta-btn:focus {
  background: var(--color-secondary);
  color: var(--color-primary);
}
.mobile-menu-toggle {
  display: none;
  font-size: 2.3rem;
  line-height: 1;
  background: none;
  color: var(--color-primary);
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 50%;
  transition: background 0.18s;
}
.mobile-menu-toggle:hover, .mobile-menu-toggle:focus {
  background: var(--color-accent);
  outline: none;
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(35,73,110,0.97);
  z-index: 999;
  transform: translateX(-100vw);
  transition: transform 0.33s cubic-bezier(.41,.3,.27,1.38);
  display: flex;
  flex-direction: column;
  padding: 0 0 32px 0;
  overflow-y: auto;
}
.mobile-menu.open {
  transform: translateX(0);
}
.mobile-menu-close {
  font-size: 2.1rem;
  color: #fff;
  align-self: flex-end;
  margin: 28px 28px 8px 0;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.18s;
}
.mobile-menu-close:hover, .mobile-menu-close:focus {
  color: var(--color-secondary);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-top: 28px;
  margin-left: 38px;
  gap: 22px;
}
.mobile-nav a {
  color: #fff;
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
  transition: color 0.2s;
  padding: 6px 0;
}
.mobile-nav a:hover, .mobile-nav a:focus {
  color: var(--color-secondary);
  outline: none;
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(100deg, #f6f9fe 80%, #eaf3fd 100%);
  padding: 58px 0 36px 0;
  border-bottom: 1px solid #e2e8f0;
}
.hero .container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.hero .content-wrapper {
  display: flex;
  flex-direction: column;
  gap: 17px;
  align-items: flex-start;
}
.hero h1 {
  font-size: 2.3rem;
  color: var(--color-primary);
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.hero p {
  font-size: 1.25rem;
  color: #23496e;
  margin-bottom: 20px;
  line-height: 1.65;
}

/* ===== SECTION SPACING ===== */
main section, .section {
  margin-bottom: 60px;
  padding: 40px 20px;
}
main section:last-child {
  margin-bottom: 0;
}
.content-wrapper {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.content-wrapper.text-section {
  gap: 18px;
}
.text-section ul li,
.text-section p {
  margin-bottom: 9px;
  font-size: 1rem;
}
.text-section ul {
  margin-bottom: 10px;
  padding-left: 0;
}
.text-section ul li {
  padding-left: 2px;
  list-style: disc inside;
}

/* ===== FEATURES FLEX-GRID ===== */
.feature-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
}
.feature-grid > div {
  flex: 1 1 200px;
  min-width: 220px;
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  padding: 22px 16px 18px 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  border: 1px solid #e2e8f0;
}
.feature-grid img {
  width: 38px; height: 38px;
  object-fit: contain;
}
.feature-grid h3 {
  color: var(--color-primary);
  font-size: 1.16rem;
  font-weight: 700;
}
.feature-grid p {
  font-size: 1rem;
  color: var(--color-text-dark);
}

/* ===== TESTIMONIALS ===== */
.testimonial-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: #f7fbfd;
  border-radius: var(--border-radius);
  margin-bottom: 20px;
  box-shadow: 0 1px 6px rgba(35,73,110,0.07);
  border: 1px solid #e6eef8;
}
.testimonial-card p {
  color: #1A2636;
  font-size: 1.06rem;
  font-weight: 500;
}
.testimonial-card span {
  color: var(--color-primary);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.star-ratings {
  margin-top: 30px;
  font-size: 1.15rem;
  color: #ffb300;
  font-weight: 600;
  letter-spacing: -1px;
}

.success-stories {
  margin-top: 32px;
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  padding: 18px 18px 12px 18px;
  border: 1px solid #e2e8f0;
}
.success-stories h3 {
  margin-bottom: 14px;
  font-size: 1.15rem;
}
.success-stories ul li {
  font-size: 1rem;
  color: #23496E;
  margin-bottom: 7px;
  padding-left: 1px;
  list-style: disc inside;
}

/* ===== ABOUT: TRUST SIGNALS ===== */
.trust-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 19px;
}
.trust-signals span {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1rem;
  background: #f5f9fd;
  color: var(--color-primary);
  font-weight: 600;
  border-radius: 9px;
  padding: 8px 18px;
}
.trust-signals img {
  width: 24px;
  height: 24px;
}

/* ===== INSTRUCTORS ===== */
.instructor-bios-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  margin-bottom: 22px;
}
.instructor-bios-grid > div {
  flex: 1 1 220px;
  min-width: 220px;
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  border: 1px solid #e2e8f0;
  padding: 18px 18px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}
.instructor-bios-grid h3 {
  color: var(--color-primary);
  font-size: 1.13rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.instructor-bios-grid ul {
  margin-bottom: 0;
}
.instructor-bios-grid ul li {
  font-size: 0.97rem;
  list-style: disc inside;
}

/* ===== FAQ: ACCORDION ===== */
.faq-accordion h3 {
  font-size: 1.08rem;
  margin-top: 8px;
  color: var(--color-primary);
  cursor: pointer;
  transition: color 0.2s;
  font-weight: 700;
}
.faq-accordion h3:hover, .faq-accordion h3:focus {
  color: var(--color-secondary);
}
.faq-accordion p {
  font-size: 0.97rem;
  font-weight: 400;
  margin-bottom: 10px;
  color: #30425e;
}

/* ===== CONTACT PROMPT ===== */
.contact-prompt {
  margin-top: 18px;
  background: #eef8ff;
  padding: 14px 16px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 500;
  display: flex;
  align-items: center;
}
.contact-prompt a {
  color: var(--color-secondary);
  font-weight: 600;
  margin-left: 4px;
}

/* ===== GENERAL CARDS ===== */
.card-container {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.card {
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  position: relative;
  border: 1px solid #e2e8f0;
  padding: 22px 16px;
}

/* ===== GRID/FLEX PATTERNS ===== */
.content-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}
.text-image-section {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.feature-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 15px;
}

/* ===== FOOTER ===== */
footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 38px 0 18px 0;
  font-size: 15px;
  margin-top: 34px;
}
footer .container {
  display: flex;
  flex-direction: column;
  gap: 13px;
}
.footer-nav {
  display: flex;
  gap: 26px;
  margin-bottom: 8px;
}
.footer-nav a {
  color: var(--color-footer-text);
  font-weight: 500;
  padding: 2px 0;
  transition: color 0.19s;
}
.footer-nav a:hover, .footer-nav a:focus {
  color: var(--color-secondary);
  outline: none;
}
.contact-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  font-size: 0.96rem;
}
.contact-footer span {
  display: flex;
  align-items: center;
  gap: 7px;
}
.contact-footer img {
  width: 19px;
  height: 19px;
}
.copyright {
  margin-top: 6px;
  color: #a5b9c8;
  font-size: 0.93rem;
  font-weight: 400;
}

/* ===== BUTTONS ===== */
button, .cta-btn {
  border: none;
  outline: none;
  cursor: pointer;
  font-family: var(--font-display);
}

/* ===== ANIMATIONS & MICROINTERACTIONS ===== */
.cta-btn, button, .card, .testimonial-card, .feature-grid > div, .instructor-bios-grid > div, .success-stories {
  transition: background 0.2s, box-shadow 0.22s, color 0.18s, border-color 0.18s, transform 0.18s;
}
.feature-grid > div:hover, .testimonial-card:hover, .instructor-bios-grid > div:hover,
.card:hover, .success-stories:hover {
  box-shadow: 0 6px 28px rgba(35,73,110,0.11);
  transform: translateY(-3px) scale(1.025);
}

/* ===== TYPOGRAPHY SCALE ===== */
h1 {
  font-size: 2.15rem;
  margin-bottom: 12px;
}
h2 {
  font-size: 1.56rem;
  color: var(--color-primary);
  font-weight: 800;
  margin-bottom: 10px;
}
h3 {
  font-size: 1.18rem;
  margin-bottom: 8px;
}
p, li {
  font-size: 1rem;
}

/* ===== MODALS, BANNERS ===== */
/* ======= COOKIE CONSENT ======= */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 1500;
  background: #fff;
  box-shadow: 0 -2px 24px rgba(35,73,110,0.10);
  border-top: 2px solid var(--color-primary);
  padding: 20px 18px 17px 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  animation: fadeInUpCookie 0.65s cubic-bezier(.41,.3,.27,1.38);
}
@keyframes fadeInUpCookie {
  from { transform: translateY(120px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.cookie-banner p {
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 8px;
}
.cookie-actions {
  display: flex;
  gap: 16px;
}
.cookie-banner button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 21px;
  padding: 8px 19px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.17s, color 0.17s, box-shadow 0.13s;
  margin-right: 2px;
}
.cookie-banner .cookie-settings-btn {
  background: #F6E7DB;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.cookie-banner .cookie-settings-btn:hover, .cookie-banner .cookie-settings-btn:focus {
  background: #fff;
  color: var(--color-secondary);
}
.cookie-banner .accept-all-btn:hover, .cookie-banner .accept-all-btn:focus {
  background: var(--color-secondary);
  color: var(--color-primary);
  box-shadow: 0 2px 6px rgba(174,213,129,0.11);
}
.cookie-banner .reject-all-btn {
  background: #ECEFF1;
  color: var(--color-primary);
  border: 1.5px solid #bfcbd8;
}
.cookie-banner .reject-all-btn:hover, .cookie-banner .reject-all-btn:focus {
  background: #e0e8ef;
  color: #a31e1e;
}

/* ===== COOKIE PREFERENCES MODAL ===== */
.cookie-modal {
  position: fixed;
  z-index: 2000;
  left: 0; top: 0;
  width: 100vw; height: 100vh;
  background: rgba(30,49,77, 0.54);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInOverlay 0.28s;
}
@keyframes fadeInOverlay {
  from { opacity: 0; }
  to { opacity: 1; }
}
.cookie-modal-content {
  background: #fff;
  border-radius: 18px;
  padding: 32px 24px 20px 24px;
  max-width: 414px;
  min-width: 304px;
  box-shadow: var(--shadow-modal);
  display: flex;
  flex-direction: column;
  gap: 22px;
  animation: fadeInUpCookie 0.32s cubic-bezier(.43,.62,.11,1.23);
}
.cookie-modal-content h2 {
  color: var(--color-primary);
  font-size: 1.31rem;
  margin-bottom: 13px;
}
.cookie-modal-content label {
  font-size: 1.07rem;
  color: #021e37;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.cookie-modal-toggle {
  width: 38px; height: 23px;
  border-radius: 20px;
  background: #E2E8F0;
  position: relative;
  transition: background 0.18s;
  margin-left: 4px;
  display: inline-block;
}
.cookie-modal-toggle input:checked + .cookie-modal-slider {
  background: var(--color-secondary);
}
.cookie-modal-slider {
  position: absolute; left: 0; top: 0;
  width: 38px; height: 23px;
  background: #E2E8F0;
  border-radius: 20px;
  transition: background 0.18s;
}
.cookie-modal-toggle input {
  display: none;
}
.cookie-modal-slider::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 17px; height: 17px;
  background: #fff;
  border-radius: 50%;
  transition: left 0.2s;
}
.cookie-modal-toggle input:checked + .cookie-modal-slider::after {
  left: 18px;
  background: var(--color-primary);
}
.cookie-modal-actions {
  display: flex;
  gap: 14px;
  margin-top: 16px;
}
.cookie-modal-actions button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 19px;
  padding: 9px 21px;
  font-size: 1rem;
  font-weight: 600;
}
.cookie-modal-actions .cookie-modal-cancel {
  background: #ECEFF1;
  color: var(--color-primary);
}
.cookie-modal-actions button:hover, .cookie-modal-actions button:focus {
  background: var(--color-secondary);
  color: var(--color-primary);
}

/* === MAP SECTION IN CONTACT === */
.map {
  background: #eef8ff;
  border-radius: var(--border-radius);
  padding: 14px 16px;
  font-size: 1rem;
  margin-top: 12px;
  margin-bottom: 0;
}

/* === RESPONSIVE DESIGN: MOBILE-FIRST === */
@media (max-width: 1050px) {
  .main-nav {
    gap: 18px;
    font-size: 16px;
  }
  .footer-nav {
    gap: 18px;
  }
}
@media (max-width: 880px) {
  .feature-grid, .instructor-bios-grid {
    gap: 18px;
  }
  .feature-grid > div, .instructor-bios-grid > div {
    min-width: 160px;
    padding: 15px 8px;
    font-size: 0.98rem;
  }
}
@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .container {
    max-width: 99vw;
    padding-left: 10px;
    padding-right: 10px;
  }
  .feature-grid, .instructor-bios-grid{
    flex-direction: column;
    gap: 16px;
  }
  .feature-grid > div, .instructor-bios-grid > div {
    min-width: 0;
    width: 100%;
  }
  .footer-nav, .contact-footer {
    flex-direction: column;
    gap: 9px;
    align-items: flex-start;
  }
  .hero .container {
    align-items: flex-start;
  }
  .section, main section {
    padding: 28px 10px;
    margin-bottom: 40px;
  }
  .content-grid, .card-container {
    flex-direction: column;
    gap: 16px;
  }
  .text-image-section {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }
  .testimonial-card {
    padding: 15px 10px;
    gap: 9px;
  }
  .cookie-modal-content {
    min-width: 90vw;
    max-width: 95vw;
    padding: 20px 8px !important;
  }
}
@media (max-width: 540px) {
  .hero {
    padding-top: 34px;
    padding-bottom: 12px;
  }
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.13rem; }
  h3 { font-size: 1.00rem; }
}

/* ===== UTILITIES ===== */
.mt-32 { margin-top: 32px !important; }
.mb-24 { margin-bottom: 24px !important; }
.w-full { width: 100%; }

/* ===== ACCESSIBILITY ===== */
:focus {
  outline: 2px solid var(--color-secondary) !important;
  outline-offset: 1px;
}

/* Hide elements with .sr-only but keep accessible to screen readers */
.sr-only {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

/* ===== CUSTOM SCROLLBAR STYLING ===== */
body::-webkit-scrollbar {
  width: 10px;
  background: #ececf6;
}
body::-webkit-scrollbar-thumb {
  background: #dbdee3;
  border-radius: 8px;
}

/* ===== PRINT OVERRIDES ===== */
@media print {
  header,footer,.mobile-menu,.cookie-banner,.cookie-modal {
    display: none !important;
  }
  body {
    background: #fff !important;
    color: #222;
  }
}