/*
Theme Name: 수학 이야기
Theme URI: https://suhakstory.com/
Description: A quiet, text-first child theme for 수학 이야기.
Author: 수학 이야기
Template: twentytwentyfive
Version: 0.5.0
Requires at least: 6.7
Text Domain: suhakstory
*/

:root {
  --suhak-paper: #fafaf7;
  --suhak-ink: #1b2832;
  --suhak-muted: #52616b;
  --suhak-blue: #0057d9;
  --suhak-red: #d92332;
  --suhak-yellow: #ffcf24;
  --suhak-yellow-ink: #755300;
  --suhak-light-blue: #eaf2ff;
  --suhak-light-red: #fff1f1;
  --suhak-light-yellow: #fff8db;
  --suhak-rule: #d9e0e8;
}

body {
  background: var(--suhak-paper);
  color: var(--suhak-ink);
  word-break: keep-all;
}

.wp-site-blocks {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.suhak-main { flex: 1; }

.suhak-header-shell {
  border-bottom: 1px solid var(--suhak-rule);
  padding: 16px clamp(18px, 4vw, 48px);
}

.suhak-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  color: var(--suhak-ink);
  text-decoration: none;
}

.suhak-brand-mark {
  display: block;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
}

.suhak-brand-type { display: flex; flex-direction: column; min-width: 0; line-height: 1.22; }
.suhak-brand-type strong { font-size: 1.12rem; font-weight: 780; letter-spacing: -0.055em; white-space: nowrap; }
.suhak-brand-type small { margin-top: 0.18rem; color: var(--suhak-muted); font-size: 0.65rem; font-weight: 580; letter-spacing: 0.015em; white-space: nowrap; }
.suhak-brand:hover .suhak-brand-type strong { color: var(--suhak-blue); }

.suhak-header-shell .wp-block-navigation a {
  text-decoration: none;
}

.suhak-header-shell .wp-block-navigation a:hover,
.suhak-header-shell .wp-block-navigation a:focus-visible {
  color: var(--suhak-blue);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.suhak-header-shell .wp-block-navigation {
  font-size: 0.86rem;
  font-weight: 550;
}

.suhak-main .wp-block-post-content,
.suhak-article-body {
  font-size: clamp(17px, 1.15vw, 18px);
  line-height: 1.82;
  overflow-wrap: break-word;
}

.suhak-main .wp-block-post-content p,
.suhak-article-body p {
  margin-block: 0 1.2em;
}

.suhak-main h1,
.suhak-main h2,
.suhak-main h3 {
  color: var(--suhak-ink);
  line-height: 1.36;
  letter-spacing: -0.035em;
}

.suhak-main h1 { font-size: clamp(2rem, 4vw, 3rem); }
.suhak-main h2 { font-size: clamp(1.5rem, 2.5vw, 1.9rem); margin-top: 2.4em; }
.suhak-main h3 { font-size: 1.22rem; margin-top: 2em; }

.suhak-main a:not(.wp-block-button__link) {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.suhak-main a:focus-visible,
.suhak-header-shell a:focus-visible {
  outline: 2px solid var(--suhak-blue);
  outline-offset: 3px;
}

.suhak-eyebrow {
  color: var(--suhak-blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 1.2rem !important;
}

.suhak-intro {
  color: var(--suhak-muted);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.74;
}

.suhak-rule,
.suhak-main hr {
  border: 0;
  border-top: 1px solid var(--suhak-rule);
  margin-block: 3rem;
}

.suhak-main blockquote {
  border-inline-start: 3px solid var(--suhak-red);
  margin-inline: 0;
  padding-inline-start: 1.2rem;
}

.suhak-main :is(pre, .wp-block-code, .wp-block-table, .katex-display, .math-display) {
  overflow-x: auto;
}

.suhak-main :is(.wp-block-table, table) {
  font-size: 0.92em;
}

.suhak-main table th,
.suhak-main table td {
  border-color: var(--suhak-rule);
  padding: 0.65em 0.8em;
}

.suhak-post-meta {
  color: var(--suhak-muted);
  font-size: 0.82rem;
}

.suhak-footer-shell {
  border-top: 1px solid var(--suhak-rule);
  color: var(--suhak-muted);
  font-size: 0.78rem;
  padding: 28px clamp(18px, 4vw, 48px);
}

.suhak-footer-shell .wp-block-site-title {
  color: var(--suhak-ink);
  font-size: 0.88rem;
  font-weight: 700;
}

.suhak-footer-shell .wp-block-site-title a { text-decoration: none; }

@media (max-width: 600px) {
  .suhak-header-shell { padding-block: 12px; }
  .suhak-header-shell .suhak-brand-mark { width: 36px; height: 36px; }
  .suhak-header-shell .suhak-brand-type strong { font-size: 1rem; }
  .suhak-main h2 { margin-top: 2em; }
}

@media (max-width: 480px) {
  .suhak-header-shell .suhak-brand-type small { display: none; }
}

/* Homepage editorial layout, 2026-09-27 */
.suhak-header-shell {
  position: relative;
}

.suhak-header-shell::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--suhak-blue) 0 48%, var(--suhak-red) 48% 82%, var(--suhak-yellow) 82%);
}

.suhak-front-main,
.suhak-front-main .wp-block-post-content {
  margin-block-start: 0 !important;
  padding: 0 !important;
}

.suhak-home {
  box-sizing: border-box;
  width: 100%;
  max-width: 1200px !important;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

.suhak-home :is(h1, h2, h3, p, figure) { margin-block-start: 0; }
.suhak-home h1,
.suhak-home h2,
.suhak-home h3 { color: var(--suhak-ink); }

.suhak-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(0, 1.02fr);
  align-items: center;
  gap: clamp(32px, 5vw, 76px);
  padding: clamp(60px, 7vw, 90px) 0 clamp(48px, 6vw, 76px);
}

.suhak-kicker,
.suhak-section-index {
  color: var(--suhak-blue);
  font-size: 0.76rem;
  font-weight: 760;
  letter-spacing: 0.09em;
  line-height: 1.5;
}

.suhak-kicker { margin-bottom: 1.7rem !important; }
.suhak-kicker span { margin-right: 0.55em; font-size: 1rem; }

.suhak-home .suhak-hero h1 {
  max-width: 14em;
  margin: 0 0 1.45rem;
  font-size: clamp(2.3rem, 4vw, 3.7rem);
  font-weight: 760;
  line-height: 1.24;
  letter-spacing: -0.052em;
  word-break: keep-all;
}

.suhak-hero-accent {
  color: var(--suhak-blue);
  text-decoration: underline;
  text-decoration-color: var(--suhak-red);
  text-decoration-thickness: 0.085em;
  text-underline-offset: 0.14em;
}

.suhak-hero-lead {
  max-width: 35em;
  color: var(--suhak-muted);
  font-size: clamp(1.03rem, 1.32vw, 1.16rem);
  line-height: 1.82;
  margin-bottom: 1.8rem !important;
}

.suhak-hero-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.65rem; }
.suhak-hero-links a,
.suhak-reading a {
  color: var(--suhak-blue);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.35em;
}
.suhak-hero-links a:hover,
.suhak-reading a:hover { color: var(--suhak-ink); }
.suhak-hero-links span,
.suhak-reading a span { display: inline-block; margin-left: 0.3em; }

.suhak-hero-photo { min-width: 0; margin: 0; }
.suhak-hero-photo img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; }
.suhak-hero-photo figcaption { margin-top: 0.7rem; padding-left: 0.7rem; border-left: 3px solid var(--suhak-red); color: var(--suhak-muted); font-size: 0.74rem; line-height: 1.55; }

.suhak-graph-feature { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr); align-items: center; gap: clamp(36px, 6vw, 90px); padding: clamp(64px, 7vw, 88px) 0; border-top: 1px solid var(--suhak-rule); border-bottom: 1px solid var(--suhak-rule); }
.suhak-graph-intro .suhak-section-index { margin-bottom: 1.4rem !important; color: var(--suhak-red); }
.suhak-home .suhak-graph-intro h2 { margin: 0 0 1.6rem; font-size: clamp(1.7rem, 2.7vw, 2.45rem); line-height: 1.32; letter-spacing: -0.043em; }
.suhak-graph-question { margin: 0 0 0.95rem !important; padding-left: 1rem; border-left: 4px solid var(--suhak-red); color: var(--suhak-ink); font-size: 1.12rem; font-weight: 700; line-height: 1.6; }
.suhak-graph-note { margin: 0 !important; color: var(--suhak-muted); font-size: 0.93rem; line-height: 1.75; }
.suhak-hero-figure { min-width: 0; margin: 0; padding: clamp(14px, 2vw, 24px); background: var(--suhak-light-blue); }
.suhak-hero-figure img { display: block; width: 100%; height: auto; }

.suhak-topics,
.suhak-classroom { padding: clamp(64px, 7vw, 96px) 0; border-bottom: 1px solid var(--suhak-rule); }
.suhak-section-heading { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 1rem; align-items: start; }
.suhak-section-index { margin: 0.25rem 0 0 !important; white-space: nowrap; }
.suhak-home .suhak-section-heading h2,
.suhak-home .suhak-reading h2 {
  margin: 0;
  font-size: clamp(1.7rem, 2.5vw, 2.3rem);
  line-height: 1.34;
  letter-spacing: -0.043em;
}

.suhak-topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(36px, 4vw, 56px);
}
.suhak-topic-grid article { padding: 1.55rem clamp(15px, 2vw, 28px) 1.9rem; border-top: 3px solid currentColor; background: linear-gradient(180deg, var(--suhak-topic-tint), transparent 86%); }
.suhak-topic-grid article:nth-child(1) { color: var(--suhak-blue); --suhak-topic-tint: var(--suhak-light-blue); }
.suhak-topic-grid article:nth-child(2) { color: var(--suhak-red); --suhak-topic-tint: var(--suhak-light-red); }
.suhak-topic-grid article:nth-child(3) { color: var(--suhak-yellow-ink); border-top-color: var(--suhak-yellow); --suhak-topic-tint: var(--suhak-light-yellow); }
.suhak-topic-number { display: block; margin-bottom: 1.8rem; color: var(--suhak-blue); font-size: 0.8rem; font-weight: 750; font-variant-numeric: tabular-nums; }
.suhak-topic-grid article .suhak-topic-number { color: inherit; }
.suhak-home .suhak-topic-grid h3 { margin: 0 0 0.7rem; color: inherit; font-size: 1.22rem; line-height: 1.35; }
.suhak-topic-grid p { margin: 0 !important; color: var(--suhak-muted); font-size: 0.95rem; line-height: 1.72; }

.suhak-classroom-body { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(36px, 5vw, 80px); margin: clamp(36px, 4vw, 56px) 0 0 170px; }
.suhak-classroom-statement { margin: 0 !important; padding-left: 1.2rem; border-left: 3px solid var(--suhak-red); color: var(--suhak-ink); font-size: clamp(1.13rem, 1.55vw, 1.38rem); font-weight: 600; line-height: 1.62; letter-spacing: -0.03em; }
.suhak-classroom ol { margin: 0; padding: 0; list-style: none; counter-reset: lesson; }
.suhak-classroom li { display: grid; grid-template-columns: 2.5rem 1fr; gap: 0.4rem; padding: 0.45rem 0 0.8rem; border-bottom: 1px solid var(--suhak-rule); color: var(--suhak-ink); font-size: 0.96rem; line-height: 1.65; counter-increment: lesson; }
.suhak-classroom li:first-child { padding-top: 0; }
.suhak-classroom li::before { content: '0' counter(lesson); color: var(--suhak-red); font-size: 0.78rem; font-weight: 750; font-variant-numeric: tabular-nums; }

.suhak-reading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr); gap: clamp(28px, 6vw, 90px); padding: clamp(64px, 7vw, 96px) 0 clamp(80px, 8vw, 116px); }
.suhak-reading .suhak-section-index { margin-bottom: 1.4rem !important; }
.suhak-reading p:not(.suhak-section-index) { margin: 0 0 1.2rem !important; color: var(--suhak-muted); font-size: 0.96rem; line-height: 1.8; }

.suhak-about { max-width: 900px; margin: 0 auto; }
.suhak-about-lead { color: var(--suhak-ink); font-size: clamp(1.22rem, 2vw, 1.5rem); font-weight: 600; line-height: 1.72; }
.suhak-about-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 5vw, 72px); margin-top: 3.5rem; padding-top: 1.3rem; border-top: 1px solid var(--suhak-ink); }
.suhak-about-grid section { border-bottom: 1px solid var(--suhak-rule); padding-bottom: 2rem; }
.suhak-about-grid .suhak-section-index { margin-bottom: 1.2rem !important; }
.suhak-about-grid h2 { margin: 0 0 1rem; font-size: 1.35rem; }
.suhak-about-grid p:not(.suhak-section-index) { color: var(--suhak-muted); font-size: 0.95rem; line-height: 1.8; }
.suhak-about-closing { margin-top: 3rem !important; color: var(--suhak-blue); font-size: 1.12rem; font-weight: 700; }

.suhak-about-grid section:nth-child(2) .suhak-section-index,
.suhak-about-grid section:nth-child(2) h2 { color: var(--suhak-red); }

.suhak-footer-shell { background: var(--suhak-light-blue); }

.suhak-footer-inner { box-sizing: border-box; display: flex; justify-content: space-between; gap: 2rem; align-items: start; max-width: 1104px; margin: 0 auto; }
.suhak-footer-brand .suhak-brand-mark { width: 38px; height: 38px; }
.suhak-footer-brand .suhak-brand-type strong { font-size: 1rem; }
.suhak-footer-brand p { margin: 0.15rem 0 0 3rem; font-size: 0.82rem; line-height: 1.6; }
.suhak-footer-nav { display: flex; gap: 1.5rem; padding-top: 0.3rem; }
.suhak-footer-nav a { color: var(--suhak-muted); text-decoration: none; font-size: 0.83rem; font-weight: 620; }
.suhak-footer-nav a:hover { color: var(--suhak-blue); text-decoration: underline; text-underline-offset: 0.25em; }

@media (max-width: 800px) {
  .suhak-hero { grid-template-columns: 1fr; gap: 2.6rem; }
  .suhak-graph-feature { grid-template-columns: 1fr; gap: 2.1rem; }
  .suhak-hero-figure { max-width: 620px; }
  .suhak-section-heading { grid-template-columns: 1fr; gap: 0.8rem; }
  .suhak-classroom-body { margin-left: 0; }
}

@media (max-width: 600px) {
  .suhak-home { padding-inline: 20px; }
  .suhak-hero { padding-block: 52px 56px; gap: 2.2rem; }
  .suhak-graph-feature { padding-block: 62px; }
  .suhak-home .suhak-hero h1 { font-size: clamp(2.05rem, 8.2vw, 2.6rem); }
  .suhak-hero-lead { font-size: 1.03rem; }
  .suhak-hero-links { gap: 0.8rem 1.2rem; }
  .suhak-topics, .suhak-classroom { padding-block: 62px; }
  .suhak-topic-grid { display: block; }
  .suhak-topic-grid article { padding: 1.25rem 1rem 1.45rem; }
  .suhak-topic-number { margin-bottom: 0.7rem; }
  .suhak-classroom-body, .suhak-reading, .suhak-about-grid { grid-template-columns: 1fr; }
  .suhak-classroom-body { gap: 1.5rem; }
  .suhak-reading { gap: 1.9rem; }
  .suhak-about-grid { margin-top: 2.5rem; gap: 2rem; }
  .suhak-footer-inner { flex-direction: column; gap: 1rem; }
  .suhak-footer-nav { padding-top: 0; }
}