:root {
  --bg: #FAF7F2;
  --text: #1A1815;
  --text-sub: #6B6560;
  --accent: #C44A1F;
  --accent-hover: #A83E18;
  --green: #2D5F3F;
  --border: #E8E2D9;
  --card-bg: #FFFFFF;
  --font-kr: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --max-w: 860px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-en);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1.125rem;
}

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

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

/* ── Scroll Animation ── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.1, 0.25, 1),
              transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Layout ── */

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

/* ── Section Label ── */

.section-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 20px;
}

/* ── Header ── */

.site-header {
  padding: 28px 0;
  position: relative;
  z-index: 10;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.7;
}

.logo img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-sub);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--accent);
}

.nav-link--accent {
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.nav-arrow {
  transition: transform 0.2s;
}

.nav-link--accent:hover {
  color: #A03E1A;
}

.nav-link--accent:hover .nav-arrow {
  transform: translate(2px, -2px);
}

/* ── Hero ── */

.hero {
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 75% 30%, rgba(196, 74, 31, 0.07) 0%, transparent 50%);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(45, 95, 63, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.hero-title {
  font-family: var(--font-kr);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  max-width: 600px;
}

.hero-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 0.92em;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent);
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  transition: background-color 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 1px 3px rgba(196, 74, 31, 0.12);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(196, 74, 31, 0.18);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(196, 74, 31, 0.12);
}

/* ── About ── */

.about {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.about-left .section-title {
  font-family: var(--font-kr);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.35;
  margin-bottom: 0;
}

.about-right p {
  color: var(--text-sub);
  margin-bottom: 1.5em;
}

.about-right p:last-child {
  margin-bottom: 0;
}

.about-highlight {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 28px;
  margin-top: 32px;
  line-height: 1.7;
  color: var(--text);
}

.about-highlight .highlight-emoji {
  font-size: 1.25rem;
  margin-right: 8px;
}

.about-highlight .highlight-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
}

/* ── Tools ── */

.tools {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.tools .section-title {
  font-family: var(--font-kr);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
  margin-bottom: 40px;
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 36px 36px 36px 40px;
  position: relative;
  overflow: hidden;
  transition: all 250ms ease;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(196, 74, 31, 0.12);
}

.tool-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.tool-name {
  font-family: var(--font-en);
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.tool-subtitle {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.tool-desc {
  color: var(--text-sub);
  font-size: 1rem;
  margin-bottom: 24px;
  line-height: 1.7;
  max-width: 540px;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: gap 0.2s;
}

.tool-link:hover {
  gap: 10px;
}

.tool-link svg {
  width: 16px;
  height: 16px;
}

.tools-note {
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-top: 24px;
}

/* ── Maker ── */

.maker {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.maker-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.maker-left .section-title {
  font-family: var(--font-kr);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.35;
  margin-bottom: 0;
}

.maker-right p {
  color: var(--text-sub);
  margin-bottom: 0;
}

.maker-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: gap 0.2s;
}

.maker-link:hover {
  gap: 10px;
}

.maker-link svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ── Sub-pages ── */

.page-section {
  padding: 80px 0;
}

.page-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-title {
  font-family: var(--font-kr);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
  margin-bottom: 0;
}

.page-date {
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-top: 8px;
}

.page-sub {
  color: var(--text-sub);
  margin-bottom: 32px;
}

.page-note {
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-top: 24px;
}

.email-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 36px 32px 40px;
  position: relative;
  overflow: hidden;
  transition: all 250ms ease;
}

.email-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}

.email-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(196, 74, 31, 0.12);
}

.email-link {
  display: block;
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color 0.2s;
}

.email-card:hover .email-link {
  color: var(--accent);
}

.prose h2 {
  font-family: var(--font-en);
  font-size: 1.125rem;
  font-weight: 700;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

.prose p {
  color: var(--text-sub);
  margin-bottom: 1em;
}

.prose a {
  color: var(--accent);
  transition: color 0.2s;
}

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

/* ── Footer ── */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-sub);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-sub);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-links a[aria-current="page"] {
  color: var(--text);
}

/* ── Responsive ── */

@media (min-width: 640px) {
  .hero {
    padding: 120px 0;
  }

  .hero-title {
    font-size: 4rem;
  }

  .about-grid,
  .maker-grid,
  .page-grid {
    grid-template-columns: 280px 1fr;
    gap: 60px;
  }

  .tool-card {
    padding: 40px 44px 40px 48px;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 4.5rem;
  }

  .about-grid {
    gap: 80px;
  }
}