/* =========================================
   VARIABLES
   ========================================= */

:root {
  --bg:            #FFF;
  --bg-2:          #FFF;
  --text:          #000FFF;
  --text-muted:    #000FFF;
  --accent:        #000FFF;
  --accent-dim:    #000FFF;
  --border:        #000FFF;
  --sep:           #000FFF;

  --f-display: -apple-system, 'SF Pro Text', BlinkMacSystemFont, 'Pretendard Variable', 'Pretendard', sans-serif;
  --f-body:    'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --f-mono:    -apple-system, 'SF Pro Text', BlinkMacSystemFont, 'Pretendard Variable', 'Pretendard', sans-serif;

  --max: 700px;
  --pad: 2rem;
  --ease: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg:            #0E0E0D;
  --bg-2:          #181816;
  --text:          #00ff00;
  --text-muted:    #00ff00;
  --accent:        #00ff00;
  --accent-dim:    #00ff00;
  --border:        #00ff00;
  --sep:           #00ff00;
}

/* =========================================
   RESET
   ========================================= */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

/* =========================================
   BASE
   ========================================= */

body {
  font-family: var(--f-body);
  font-size: 15px;
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  line-height: 1.7;
  transition: background-color var(--ease), color var(--ease);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

a {
  text-decoration-style: dashed;
  text-underline-offset: 2.5px;
}

/* =========================================
   THEME TOGGLE
   ========================================= */

.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 99;
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* =========================================
   HEADER
   ========================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--bg);
  padding: 1.5rem 0;
  transition: background var(--ease);
}

.header-eyebrow {
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.site-title {
  font-family: var(--f-display);
  font-size: clamp(4rem, 4vw, 7rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1;
}

.site-subtitle {
  color: var(--text-muted);
  font-weight: 300;
}

/* =========================================
   QUESTIONS
   ========================================= */

.intro-section {
  padding: 2.5rem 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.intro-section p {
  color: var(--text);
}

.questions-section {
  padding: 2rem 0 3.5rem;
}

.section-intro {
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.questions-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
  margin-bottom: 3rem;
}

.question-item {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 1.25rem;
  align-items: start;
}

.q-num {
  font-family: var(--f-display);
  font-weight: 500;
}

.q-text {
  font-family: var(--f-body);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.55rem;
  color: var(--text);
}

.q-desc {
  color: var(--text-muted);
}

.questions-cta {
  color: var(--text);
}

/* =========================================
   DIVIDER
   ========================================= */

.divider {
  border: none;
  border-top: 1px solid var(--sep);
  margin: 0;
  opacity: 0.6;
  transition: border-color var(--ease);
}

/* =========================================
   CONTENT SECTIONS
   ========================================= */

.content-section {
  padding: 3.5rem 0;
}

.section-title {
  font-family: var(--f-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.75rem;
}

.prose {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.prose p {
  color: var(--text);
}

.prose em {
  color: var(--accent);
}

/* =========================================
   BODY LIST
   ========================================= */

.body-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
}

.body-list li {
  color: var(--text);
  position: relative;
}

.body-list li::before {
  content: '–';
  position: absolute;
  left: -1.25rem;
  color: var(--text-muted);
}

/* =========================================
   OUTPUT GRID
   ========================================= */

.output-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.output-card {
  background: var(--bg-2);
  padding: 1.25rem 1.375rem;
  transition: background var(--ease);
}

.output-card:hover {
  background: var(--bg);
}

.output-tag {
  display: block;
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.output-card p {
  color: var(--text-muted);
}

/* full-width single card outside the grid (04 기록) */
.output-solo {
  border: 1px solid var(--border);
  border-radius: 3px;
  margin: 0.5rem 0;
}

/* =========================================
   PRINCIPLES (03 운영 원리)
   ========================================= */

.principles {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin: 0.5rem 0;
}

.principle-term {
  font-family: var(--f-mono);
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.principle-desc {
  color: var(--text-muted);
}

/* =========================================
   STUDY DIAGRAM (03 도식)
   ========================================= */

.study-diagram {
  margin: 0.5rem 0;
  color: var(--text);
}

.study-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.study-diagram text {
  font-family: var(--f-mono);
}

.diagram-caption {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.diagram-note {
  color: var(--text-muted);
  font-size: 0.75rem;
  line-height: 1.6;
  opacity: 0.8;
  margin-top: 0.4rem;
}

/* =========================================
   PULL QUOTE
   ========================================= */

.pull-quote {
  font-family: var(--f-display);
  font-weight: 400;
  text-align: center;
  color: var(--text);
  border-top: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  padding: 1.5rem 0;
  margin: 0.5rem 0;
}

/* =========================================
   META ROW
   ========================================= */

.meta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem 2rem;
  padding: 1.25rem 0;
  margin-bottom: 0.5rem;
}

.meta-block {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.meta-label {
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--text-muted);
}

.meta-val {
  font-weight: 500;
  color: var(--text);
}

/* =========================================
   TIMELINE
   ========================================= */

.timeline-box {
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1.5rem 1.75rem;
  background: var(--bg-2);
  margin: 0.5rem 0;
}

.timeline-label {
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1.5rem;
  padding-left: 1.25rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: var(--border);
}

.tl-item {
  display: contents;
}

.tl-time {
  font-family: var(--f-mono);
  color: var(--accent);
  white-space: nowrap;
  padding: 0.7rem 0;
  position: relative;
}

.tl-time::before {
  content: '';
  position: absolute;
  left: calc(-1.25rem - 3px);
  top: 1.05rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  z-index: 1;
}

.tl-content {
  padding: 0.7rem 0;
}

.tl-content strong {
  display: block;
  font-weight: 500;
  margin-bottom: 0.15rem;
  color: var(--text);
}

.tl-content p {
  color: var(--text-muted);
}

/* =========================================
   ORGANIZERS
   ========================================= */

.organizers-box {
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
}

.organizers-label {
  font-family: var(--f-mono);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.organizers {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1.75rem;
  row-gap: 1.5rem;
}

.org-item {
  display: contents;
}

.org-name {
  font-family: var(--f-display);
  font-weight: 500;
  color: var(--accent);
  white-space: nowrap;
}

.org-bio {
  color: var(--text-muted);
}

/* =========================================
   ASIDE NOTE
   ========================================= */

.aside-note {
  color: var(--text-muted);
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
}

/* =========================================
   FIT LIST
   ========================================= */

.fit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.fit-list li {
  padding-left: 1.5rem;
  position: relative;
}

.fit-yes li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  top: 0.15rem;
}

.fit-no {
  margin-top: 0;
}

.fit-no li {
  color: var(--text-muted);
}

.fit-no li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

.fit-not-label {
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* =========================================
   APPLY SECTION
   ========================================= */

.apply-box {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.apply-box > p {
  color: var(--text);
}

.apply-qs {
  background: var(--bg-2);
  border-radius: 2px;
  padding: 20px 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.9;
}

.apply-qs p {
  color: var(--text);
}

.apply-or {
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--text-muted);
  text-align: center;
  padding: 0.75rem 0;
}

.apply-btn {
  width: 100%;
  display: inline-block;
  font-family: var(--f-mono);
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: 2px;
  align-self: flex-start;
  transition: opacity 0.2s ease;
  text-align: center;
}

.apply-btn:hover {
  opacity: 0.8;
}

/* =========================================
   QUOTES
   ========================================= */

.quotes-box {
  padding: 3.5rem 0;
    border-top: 1px solid var(--sep);
    position: relative;
    cursor: pointer;
    text-align: center;
    height: 30rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quote-inner {
  display: flex;
  flex-direction: column;
  opacity: 1;
  transition: opacity 0.4s ease;
}

.quote-inner.fade-out {
  opacity: 0;
}

.quote-text {
  font-family: var(--f-display);
  font-weight: 400;
  color: var(--text);
}

.quote-text::before { content: '\201C'; }
.quote-text::after  { content: '\201D'; }

.quote-text-en {
  font-family: var(--f-body);
  color: var(--text-muted);
  font-style: italic;
}

.quote-author {
  font-family: var(--f-mono);
  font-style: normal;
  color: var(--text-muted);
}



/* =========================================
   FOOTER
   ========================================= */

.site-footer {
  padding: 2.5rem 0 4rem;
  border-top: 1px solid var(--border);
}

.site-footer p {
  font-family: var(--f-mono);

  text-transform: uppercase;
  color: var(--text-muted);
}

/* =========================================
   SECTION NUMBERS
   ========================================= */

.sec-num {
  font-family: var(--f-mono);
  color: var(--text);
  margin-right: 0.65em;
  display: inline-block;
}

/* =========================================
   FLOATING TOC
   ========================================= */

.toc {
  display: none;
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  left: max(1.5rem, calc(50% - 350px - 180px));
  width: 148px;
  z-index: 50;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  transition: border-color var(--ease);
}

.toc-link {
  display: flex;
  align-items: baseline;
  gap: 0.55em;
  padding: 0.42em 0 0.42em 1em;
  font-family: var(--f-mono);
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color var(--ease), border-color var(--ease);
}

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

.toc-link.active {
  color: var(--text);
  border-left-color: var(--accent);
  font-weight: 600;
}

.toc-num {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color var(--ease);
}

.toc-link.active .toc-num {
  color: var(--accent);
}

@media (min-width: 1160px) {
  .toc {
    display: block;
  }
}

/* =========================================
   SCROLL ANIMATIONS
   ========================================= */

[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================
   RESPONSIVE
   ========================================= */

@media (max-width: 580px) {
  :root {
    --pad: 1.25rem;
  }

  body {
    font-size: 14px;
  }

  .site-title {
    font-size: clamp(2rem, 2.5vw, 7rem);
  }

  .site-header {
    padding: 20px 0;
  }

  .theme-toggle {
    top: 1rem;
    right: 1rem;
    font-size: 11px;
  }

  .question-item {
    grid-template-columns: 2.25rem 1fr;
    gap: 0.875rem;
  }

  .questions-cta {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--accent);
    padding-top: 1rem;
  }

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



}

/* =========================================
   LETTER SCRAMBLE
   ========================================= */

.site-title {
  cursor: default;
  overflow: hidden;
}

.site-title .letter {
  display: inline-block;
  white-space: pre;
  vertical-align: top;
}

.site-title .letter-space {
  display: inline-block;
  vertical-align: top;
  width: 0.28em;
}