/* ===========================================================
   Instituto Seúl — design tokens
   Palette nods to obangsaek (traditional five-direction colors):
   deep navy, taegeuk red, taegeuk blue, ivory and ink,
   with a warm gold used only as a rare accent.
   =========================================================== */
:root{
  --navy:        #0b1d4d;
  --band-blue:   #2456c4;
  --navy-2:      #10275e;
  --navy-3:      #16326f;
  --red:         #ee2232;
  --blue:        #063580;
  --gold:        #cf9a3e;
  --ivory:       #f3efe3;
  --ink:         #15151b;

  --font-display: 'Song Myung', serif;
  --font-body: 'Work Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 14px;
  --wrap: 1320px;  
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font-body);
  background: var(--ivory);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main{
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
}
.page-section.is-active{
  flex: 1;
}
.stats-strip.is-active{
  flex: .25 .25 auto;
}

img,svg{ display:block; max-width:100%; }

a{ color: inherit; text-decoration: none; }

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 0.5em;
}

h2{ font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3{ font-size: 1.3rem; }

p{ margin: 0 0 1em; }

.eyebrow{
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--gold);
  margin: 0 0 0.8em;
}
.eyebrow-dark{ color: var(--red); }

.light{ color: var(--ivory); }

/* -----------------------------------------------------------
   Signature structural motif: a dancheong-inspired color band,
   standing in for a plain hairline between sections.
   ----------------------------------------------------------- */
.dancheong-band{
  display:flex;
  height: 6px;
  width: 100%;
}
.dancheong-band span{ flex:1; }
.dancheong-band span:nth-child(1){ background: var(--band-blue); }
.dancheong-band span:nth-child(2){ background: var(--red); }
.dancheong-band span:nth-child(3){ background: var(--gold); }
.dancheong-band span:nth-child(4){ background: var(--ivory); }
.dancheong-band span:nth-child(5){ background: var(--ink); }

/* -----------------------------------------------------------
   Header
   ----------------------------------------------------------- */
.site-header{
  background: var(--navy);
  position: sticky;
  top:0;
  z-index: 50;
  border-bottom: 1px solid rgba(243,239,227,0.12);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand-text{
  display:flex;
  flex-direction: column;
  line-height:1.2;
  color: var(--ivory);
}
.brand-text strong{
  font-family: var(--font-display);
  font-size: 1.15rem;
}
.brand-text em{
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.site-nav{
  display:flex;
  gap: 28px;
}
.site-nav a{
  color: var(--ivory);
  font-size: 0.92rem;
  opacity: 0.85;
  position: relative;
  padding: 4px 0;
}
.site-nav a:hover{ opacity: 1; }
.site-nav a::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:-2px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.site-nav a:hover::after{ transform: scaleX(1); }

.nav-toggle{
  display:none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid rgba(243,239,227,0.3);
  border-radius: 8px;
  cursor:pointer;
}
.nav-toggle span{
  height: 2px;
  background: var(--ivory);
  margin: 0 8px;
  border-radius: 2px;
}

.nav-wa{
  border: 1px solid var(--gold);
  color: var(--gold) !important;
  opacity: 1 !important;
  border-radius: 999px;
  padding: 5px 14px !important;
  font-family: var(--font-mono);
  font-size: 0.78rem !important;
  letter-spacing: 0.04em;
}
.nav-wa::after{ display:none; }
.nav-wa:hover{ background: var(--gold); color: var(--navy) !important; }

/* -----------------------------------------------------------
   Stats strip (signature big-number banner under the hero)
   ----------------------------------------------------------- */
.stats-strip{
  background: var(--navy-3);
  padding: 6px 0 0;
}
.stats-strip .stat-num{ font-size: 1.2rem; margin-bottom: 2px; }
.stats-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat{
  padding: 0 16px;
  border-left: 1px solid rgba(243,239,227,0.16);
  color: var(--ivory);
}
.stat:first-child{ border-left: none; padding-left: 0; }
.stat-num{
  display:block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 2.2rem;
  color: var(--gold);
  line-height:1;
  margin-bottom: 10px;
}
.stat-label{ font-size: 0.76rem; opacity: 0.82; line-height:1.35; display:block; }

/* -----------------------------------------------------------
   Hero
   ----------------------------------------------------------- */
.hero{
  background: radial-gradient(circle at 78% 25%, var(--navy-3), var(--navy) 60%);
  color: var(--ivory);
  padding: 12px 0;
  overflow: hidden;
  min-height: 48vh;
  display: flex;
  align-items: center;
}
.hero > .wrap{ width: 100%; }
.hero-inner{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items:center;
  gap: 40px;
}
.hero-copy{
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}
.hero-title{
  font-size: clamp(2.4rem, 5.4vw, 3.8rem);
  line-height: 1.08;
}
.hero-sub{
  max-width: 46ch;
  opacity: 0.88;
}
.hero-actions{
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-start;
  margin-top: 1.6em;
}


.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .2s ease, border-color .2s ease;
}
.btn:hover{ transform: translateY(-2px); }
.btn-solid{
  background: var(--red);
  color: var(--ivory);
}
.btn-solid:hover{ background: #a91a26; }
.btn-ghost{
  border-color: rgba(243,239,227,0.4);
  color: var(--ivory);
}
.btn-ghost:hover{ border-color: var(--gold); color: var(--gold); }

.hero-emblem{ display:flex; justify-content:center; }
#taegeuk{
  width: min(360px, 80vw);
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.35));
}
.logo-crop{
  display:block;
  overflow:hidden;
  border-radius:50%;
  position:relative;
}
.logo-crop-lg{ width:52px; height:52px; }
.logo-crop-sm{ width:40px; height:40px; }
.logo-crop-modal{ width:44px; height:44px; }
.logo-crop img{
  position:absolute;
  top:50%; left:50%;
  width:150%; height:150%;
  transform: translate(-50%,-50%);
  object-fit:cover;
}


@keyframes spin{
  from{ transform: rotate(0deg); }
  to{ transform: rotate(360deg); }
}

/* -----------------------------------------------------------
   Sections
   ----------------------------------------------------------- */
.section{ padding: 80px 0; }
.section-light{ background: var(--ivory); color: var(--ink); }
.section-navy{ background: var(--navy); color: var(--ivory); }

.two-col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items:start;
}
#sobre .two-col{
  align-items: center;
}

.section-note{ max-width: 60ch; opacity: 0.85; }
.method-intro{ margin: 40px 0 0; max-width: none; }


.fact-list{
  list-style:none;
  margin:0; padding:0;
  display:grid;
  gap: 18px;
}
.fact-list li{
  border-left: 3px solid var(--red);
  padding: 6px 0 6px 16px;
}
.fact-num{
  display:block;
  font-family: var(--font-mono);
  color: var(--blue);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

/* Programs */
.card-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 36px;
  align-items: start;
}

.program-card{
  background: var(--navy-2);
  border: 1px solid rgba(243,239,227,0.14);
  border-radius: var(--radius);
  padding: 28px;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.program-card > p{
  flex-grow: 1;
}

.program-tag{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
}
.program-card h3{ margin-top: 0.4em; color: var(--ivory); }
.chip-list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  padding:0;
  margin: 1em 0 0;
}
.chip-list li{
  border: 1px solid rgba(243,239,227,0.3);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

/* Curriculum level list, inspired by a level/duration pattern
   but rendered flat and quiet, in the institute's own palette */
.level-list{
  list-style:none;
  margin: 1.2em 0 0;
  padding:0;
  display:grid;
  gap: 8px;
}
.level-list li{
  display:flex;
  align-items:center;
  gap: 10px;
  background: rgba(243,239,227,0.05);
  border: 1px solid rgba(243,239,227,0.12);
  border-radius: 8px;
  padding: 9px 12px;
}
.lv-dot{
  width: 9px; height: 9px; min-width:9px;
  border-radius: 50%;
}
.lv-dot-red{ background: var(--red); }
.lv-dot-blue{ background: var(--blue); }
.lv-name{ font-weight: 600; font-size: 0.88rem; flex: 1; }
.lv-dur{ font-size: 0.76rem; opacity: 0.75; white-space: nowrap; }

.card-detail-btn{
  margin-top: 18px;
  align-self: flex-start;  
  background: none;
  border: none;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  padding: 0;
}
.card-detail-btn:hover{ text-decoration: underline; }

/* -----------------------------------------------------------
   Program detail modal
   ----------------------------------------------------------- */
.modal-overlay{
  position: fixed;
  inset: 0;
  background: rgba(11,29,77,0.7);
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 24px;
  z-index: 100;
}
.modal-overlay[hidden]{ display:none; }
.modal-panel{
  position: relative;
  background: var(--navy-2);
  color: var(--ivory);
  border: 1px solid rgba(207,154,62,0.4);
  border-radius: var(--radius);
  max-width: 520px;
  width: 100%;
  padding: 40px 34px 34px;
  text-align: center;
}
.modal-panel .modal-mark{
  margin-left: auto;
  margin-right: auto;
}
.modal-panel p{
  text-align: justify;
}
.modal-mark{ display:block; margin-bottom: 14px; }
.modal-panel h3{ color: var(--ivory); margin-bottom: 0.5em; }
.modal-panel p{ opacity: 0.9; text-align: justify; }
.modal-close{
  position:absolute;
  top: 14px; right: 14px;
  width: 32px; height:32px;
  border-radius: 50%;
  border: 1px solid rgba(243,239,227,0.3);
  background: none;
  color: var(--ivory);
  cursor:pointer;
}
.modal-close:hover{ border-color: var(--gold); color: var(--gold); }


/* Modality grid (replaces the old per-trimester schedule table) */
.modality-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 30px;
}
.modality-card{
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: 0 10px 30px rgba(11,29,77,0.08);
}
.modality-label{
  display:block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}
.modality-card p{ margin:0; font-size: 0.92rem; }
.mono{ font-family: var(--font-mono); font-size: 0.86rem; white-space: nowrap; }

.notes-cta{
  margin: 1em 0 0;
  font-size: 0.9rem;
}
.notes-cta a{ color: var(--gold); text-decoration: underline; }


.notes-card{
  margin-top: 30px;
  background: var(--navy);
  color: var(--ivory);
  border-radius: var(--radius);
  padding: 24px 28px;
}
.notes-card h3{ color: var(--gold); margin-bottom: 0.6em; }
.notes-card ul{ margin:0; padding-left: 1.1em; }
.notes-card li{ margin-bottom: 0.4em; }

/* Certification */
.important-card{
  background: var(--navy-2);
  border: 1px solid rgba(207,154,62,0.4);
  border-radius: var(--radius);
  padding: 36px;
  max-width: 780px;
  margin: 0 auto;
}
.important-head{
  display:flex;
  flex-direction: column;
  align-items:center;
  text-align: center;
  gap: 16px;
  margin-bottom: 1.4em;
}
.important-flag{
  display:block;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--red);
  color: var(--ivory);
  padding: 16px 12px;
  border-radius: 10px;
  text-align: center;
}
.important-card h2{ margin:0; color: var(--ivory); font-size: 1.5rem; text-align: center; }

.important-card ul{ padding-left: 1.2em; }
.important-card li{ margin-bottom: 0.6em; }
.important-card .signature{
  font-family: var(--font-display);
  color: var(--gold);
  margin-top: 1.4em;
  margin-bottom: 0;
  text-align: right;
}


/* Community / social */
.social-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.social-card{
  display:flex;
  align-items:center;
  gap: 16px;
  background: #fff;
  border: 1px solid #e7e2d3;
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.social-card:hover{
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(11,29,77,0.12);
}
.social-card-wide{
  grid-column: 1 / -1;
}
.social-card svg{ color: var(--red); flex-shrink:0; }
.social-card span{ display:flex; flex-direction:column; min-width: 0; }
.social-card em{
  font-style:normal;
  opacity:0.65;
  font-size: 0.88rem;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* Contact form */
.contact-form{
  display:grid;
  gap: 16px;
}
.contact-form label{
  display:flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--gold);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.phone-field{
  display:flex;
  gap: 8px;
}
.tel-code{
  flex: 0 0 42%;
}
.phone-field input{
  flex: 1;
  min-width: 0;
}
.contact-form input,
.contact-form select,
.contact-form textarea{

  font-family: var(--font-body);
  font-size: 0.98rem;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid rgba(243,239,227,0.3);
  background: var(--navy-2);
  color: var(--ivory);
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus{
  outline: 2px solid var(--gold);
  outline-offset: 1px;
}
.contact-form button{ justify-self: start; margin-top: 6px; }
.form-status{
  min-height: 1.4em;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--gold);
}

/* Footer */
.site-footer{ background: var(--navy); color: var(--ivory); }
.footer-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 0;
}
.footer-note{ margin:0; font-size: 0.85rem; opacity: 0.75; }
.footer-links{ display:flex; gap: 18px; }
.footer-links a{ font-size: 0.86rem; opacity: 0.85; }
.footer-links a:hover{ color: var(--gold); opacity:1; }

/* -----------------------------------------------------------
   Reveal-on-scroll utility (JS toggles .is-visible)
   ----------------------------------------------------------- */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
}

/* -----------------------------------------------------------
   Responsive
   ----------------------------------------------------------- */
@media (max-width: 880px){
  .hero-inner{ grid-template-columns: 1fr; text-align:center; }
  .hero-actions{ justify-content:center; }
  .hero-emblem{ order:-1; }
  .two-col{ grid-template-columns: 1fr; }
  .card-grid{ grid-template-columns: 1fr; }
  .social-grid{ grid-template-columns: 1fr; }
.stats-grid{ grid-template-columns: 1fr 1fr; row-gap: 28px; }
  .stat{ border-left: none; padding-left: 0; }
  .modality-grid{ grid-template-columns: 1fr 1fr; }
}

.page-section{ display:none; }
.page-section.is-active{ display:block; }
.page-divider{ display:none; }

#sobre.is-active,
#certificacion.is-active,
#comunidad.is-active,
#faq.is-active{
  padding-top: 10px;
  padding-bottom: 10px;
}
#sobre.is-active .two-col{ gap: 24px; }
#sobre.is-active .fact-list{ gap: 8px; }
#sobre.is-active p{ margin-bottom: 0.4em; }
#sobre.is-active h2{ margin-bottom: 0.2em; }

@media (max-width: 600px){
  .modality-grid{ grid-template-columns: 1fr; }
  .stats-grid{ grid-template-columns: 1fr; }
  .phone-field{ flex-direction: column; }
  .tel-code{ flex: 1 1 auto; }
}


@media (max-width: 900px){  
  .site-nav{
    position:absolute;
    top:100%; left:0; right:0;
    background: var(--navy);
    flex-direction:column;
    padding: 16px 24px 24px;
    gap: 16px;
    display:none;
    border-bottom: 1px solid rgba(243,239,227,0.12);
  }
  .site-nav.is-open{ display:flex; }
  .nav-toggle{ display:flex; }
.modality-grid{ grid-template-columns: 1fr 1fr; }
}


/* FAQ accordion */
.faq-list{
  display:grid;
  gap: 14px;
  margin-top: 30px;
  max-width: 760px;
}
.faq-item{
  background: #fff;
  border: 1px solid #e7e2d3;
  border-radius: var(--radius);
  padding: 6px 22px;
}
.faq-item summary{
  cursor:pointer;
  padding: 16px 0;
  font-weight: 600;
  list-style: none;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--red);
  margin-left: 12px;
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ padding-bottom: 16px; margin:0; opacity:0.85; }


/* Page-style navigation: only one .page-section shows at a time,
   toggled by script.js based on the URL hash. */
.page-section{ display:none; }
.page-section.is-active{ display:block; }
.page-divider{ display:none; }

/* Extra phone/tablet refinements */
@media (max-width: 600px){
  .modality-grid{ grid-template-columns: 1fr; }
  .stats-grid{ grid-template-columns: 1fr; }
  .phone-field{ flex-direction: column; }
  .tel-code{ flex: 1 1 auto; }
}

#sobre.is-active,
#certificacion.is-active,
#comunidad.is-active,
#faq.is-active{
  padding-top: 40px;
  padding-bottom: 40px;
}


main, .page-section.is-active{
  min-width: 0 !important;
}

@media (max-width: 600px){
  .footer-inner{
    flex-direction: column !important;
    text-align: center !important;
    gap: 16px !important;
  }
  .footer-links{
    justify-content: center !important;
  }
  body{
    overflow-x: hidden;
  }
}


html, body{
  overflow-x: hidden !important;
  max-width: 100vw !important;
}

body{
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main{
  flex: 1 0 auto;
  min-width: 0;
}

.wrap,
.hero-inner,
.card-grid,
.social-grid,
.modality-grid,
.stats-grid,
.contact-form,
.two-col,
.two-col > *{
  max-width: 100% !important;
  min-width: 0 !important;
}

.phone-field{
  flex-wrap: wrap !important;
}

@media (max-width: 600px){
  .footer-inner{
    flex-direction: column !important;
    text-align: center !important;
    gap: 16px !important;
  }
  .footer-links{
    justify-content: center !important;
  }
}

.contact-form label,
.phone-field,
.tel-code,
.level-list li,
.lv-name{
  min-width: 0;
}

.contact-form select,
.contact-form input,
.contact-form textarea{
  width: 100%;
  max-width: 100%;
}

.level-list li{
  flex-wrap: wrap;
}

.lv-dur{
  white-space: normal;
}

.card-grid > *{
  min-width: 0;
}
.program-card{
  min-width: 0;
}
.program-card p,
.program-card h3{
  overflow-wrap: break-word;
  word-break: break-word;
}

.level-list li{
  flex-wrap: wrap;
  row-gap: 4px;
}
.lv-name{
  flex: 1 1 auto;
  min-width: 0;
}
.lv-dur{
  flex-shrink: 0;
}