@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Rounded:FILL@0..1&family=Poppins:wght@400;500;600;700&display=swap');

/* 색 조합: 토스 · 클린 블루 */
:root{--primary:#3182F6;--primary-dark:#1B64DA;--text:#4E5968;--sub:#8B95A1;--bg:#F2F4F6;--surface:#FFFFFF;--border:#E5E8EB}

/* 버튼 모양: 라운드 */
.btn{border-radius:10px;padding:12px 20px;font-weight:700;background:var(--primary);color:#fff;border:none;cursor:pointer;transition:.15s}
.btn:hover{filter:brightness(.95)}

/* 폰트: Poppins */
body{font-family:'Poppins',sans-serif}
h1,h2,h3{font-weight:700}

/* 아이콘: 솔리드 (채움) */
/* 솔리드 아이콘 (Material Symbols filled / Heroicons solid) */
.icon{width:24px;height:24px;fill:currentColor;stroke:none}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3, h4 { color: #333D4B; line-height: 1.25; letter-spacing: -.035em; }
::selection { color: #fff; background: var(--primary); }

.material-symbols-rounded {
  font-family: 'Material Symbols Rounded';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'liga';
  font-variation-settings: 'FILL' 1, 'wght' 600, 'GRAD' 0, 'opsz' 24;
}

.skip-link {
  position: fixed; top: -60px; left: 16px; z-index: 1000;
  background: #111; color: #fff; padding: 10px 16px; border-radius: 8px;
}
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid rgba(49,130,246,.35); outline-offset: 3px; }

.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(820px, calc(100% - 40px)); margin: 0 auto; }
.eyebrow {
  margin: 0 0 10px; color: var(--primary); font-size: 12px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
}
.section-title { margin-bottom: 12px; font-size: clamp(28px, 3vw, 40px); }
.section-copy { max-width: 600px; margin-bottom: 32px; color: var(--sub); }
.muted { color: var(--sub); }
.desktop-only { display: block; }
.mobile-only { display: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100; height: 72px;
  background: rgba(255,255,255,.92); border-bottom: 1px solid rgba(229,232,235,.8);
  backdrop-filter: blur(18px);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 26px; }
.brand { display: flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  color: #fff; background: var(--primary); border-radius: 11px;
  box-shadow: 0 7px 16px rgba(49,130,246,.22);
}
.brand-mark .material-symbols-rounded { font-size: 22px; }
.brand-text { display: grid; line-height: 1.12; }
.brand-text strong { color: #333D4B; font-size: 17px; letter-spacing: -.04em; }
.brand-text small { margin-top: 3px; color: var(--sub); font-size: 8px; font-weight: 700; letter-spacing: .1em; }
.primary-nav { display: flex; align-items: center; gap: 4px; margin-left: 10px; }
.nav-link {
  padding: 10px 11px; color: #6B7684; border-radius: 9px; font-size: 13px; font-weight: 600;
  transition: .15s ease;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: #F0F6FF; }
.header-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.icon-button, .language-button, .menu-button {
  min-width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; color: #6B7684; background: #fff; border: 1px solid var(--border); border-radius: 10px;
  cursor: pointer; transition: .15s;
}
.icon-button:hover, .language-button:hover, .menu-button:hover { color: var(--primary); background: #F8FBFF; }
.language-button { padding: 0 12px; font-size: 12px; font-weight: 700; }
.language-button .material-symbols-rounded { font-size: 18px; }
.menu-button { display: none; }

.mobile-nav {
  display: none; position: fixed; inset: 72px 0 auto; z-index: 90;
  padding: 14px 20px 18px; background: #fff; border-bottom: 1px solid var(--border);
  box-shadow: 0 18px 35px rgba(15,23,42,.08);
}
.mobile-nav.open { display: grid; }
.mobile-nav a { padding: 12px; font-weight: 600; border-radius: 8px; }
.mobile-nav a:hover { color: var(--primary); background: #F5F9FF; }

/* Search layer */
.search-layer {
  position: fixed; inset: 0; z-index: 200; display: none; align-items: flex-start; justify-content: center;
  padding: 96px 20px 30px; background: rgba(25,31,40,.5); backdrop-filter: blur(7px);
}
.search-layer.open { display: flex; }
.search-card {
  width: min(720px, 100%); max-height: calc(100vh - 126px); overflow: auto;
  background: var(--surface); border-radius: 20px; box-shadow: 0 24px 80px rgba(12,24,45,.2);
}
.search-head { position: sticky; top: 0; z-index: 2; padding: 20px; background: #fff; border-bottom: 1px solid var(--border); }
.search-input-wrap { display: flex; align-items: center; gap: 10px; }
.search-input-wrap .material-symbols-rounded { color: var(--primary); }
.search-input {
  width: 100%; padding: 13px 4px; color: #333D4B; border: 0; outline: 0; font-size: 17px; font-weight: 500;
}
.search-close { border: 0; background: none; color: var(--sub); cursor: pointer; }
.search-controls { display: flex; gap: 8px; margin-top: 12px; }
.compact-select { flex: 0 1 180px; padding: 9px 12px; color: var(--text); background: var(--bg); border: 1px solid transparent; border-radius: 9px; font-size: 12px; font-weight: 600; }
.search-results { padding: 8px 20px 22px; }
.result-count { margin: 12px 0 6px; color: var(--sub); font-size: 12px; }
.search-result { display: flex; align-items: center; gap: 14px; padding: 14px 8px; border-bottom: 1px solid #F0F1F3; }
.search-result:hover h4 { color: var(--primary); }
.search-result-icon { width: 38px; height: 38px; display: grid; place-items: center; color: var(--primary); background: #EDF5FF; border-radius: 10px; }
.search-result h4 { margin: 0 0 2px; font-size: 14px; }
.search-result p { margin: 0; color: var(--sub); font-size: 12px; line-height: 1.45; }
.result-type { margin-left: auto; color: var(--sub); font-size: 10px; font-weight: 700; text-transform: uppercase; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 48px; box-shadow: 0 6px 16px rgba(49,130,246,.18); }
.btn .material-symbols-rounded { font-size: 20px; }
.btn-secondary { color: var(--primary); background: #fff; border: 1px solid #D9E8FF; box-shadow: none; }
.btn-ghost { color: var(--text); background: transparent; border: 1px solid var(--border); box-shadow: none; }
.text-link { display: inline-flex; align-items: center; gap: 4px; color: var(--primary); font-size: 13px; font-weight: 700; }
.text-link .material-symbols-rounded { font-size: 18px; transition: transform .15s; }
.text-link:hover .material-symbols-rounded { transform: translateX(3px); }

/* Home hero */
.hero { overflow: hidden; background: linear-gradient(180deg, #fff 0%, #F7FAFF 100%); }
.hero-inner { min-height: 610px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 70px; padding-top: 65px; padding-bottom: 70px; }
.hero-badge { display: inline-flex; align-items: center; gap: 7px; margin-bottom: 22px; padding: 8px 12px; color: var(--primary); background: #EDF5FF; border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: .04em; }
.hero-badge .material-symbols-rounded { font-size: 17px; }
.hero h1 { margin-bottom: 22px; font-size: clamp(38px, 5vw, 62px); line-height: 1.13; letter-spacing: -.055em; }
.hero h1 span { color: var(--primary); }
.hero-copy { max-width: 570px; margin-bottom: 28px; color: #6B7684; font-size: 16px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-stats { display: flex; gap: 28px; margin-top: 38px; }
.stat { position: relative; padding-right: 28px; }
.stat:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 5px; width: 1px; height: 34px; background: var(--border); }
.stat strong { display: block; color: #333D4B; font-size: 18px; }
.stat span { display: block; margin-top: 1px; color: var(--sub); font-size: 11px; }

.hero-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.blue-orbit { position: absolute; width: 430px; height: 430px; border-radius: 50%; background: linear-gradient(145deg, #EAF3FF, #F8FBFF); }
.blue-orbit::before, .blue-orbit::after { content: ''; position: absolute; border: 1px solid rgba(49,130,246,.13); border-radius: 50%; }
.blue-orbit::before { inset: 45px; }
.blue-orbit::after { inset: 100px; }
.print-card { position: relative; z-index: 2; width: 330px; padding: 24px; background: #fff; border: 1px solid rgba(229,232,235,.9); border-radius: 22px; box-shadow: 0 26px 60px rgba(45,77,120,.15); transform: rotate(-2deg); }
.print-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.print-card-title { display: flex; align-items: center; gap: 9px; color: #333D4B; font-size: 13px; font-weight: 700; }
.print-card-title span:first-child { width: 32px; height: 32px; display: grid; place-items: center; color: #fff; background: var(--primary); border-radius: 9px; }
.print-card-title .material-symbols-rounded { font-size: 18px; }
.quality-pill { padding: 5px 8px; color: #168B60; background: #E8FAF3; border-radius: 999px; font-size: 9px; font-weight: 700; }
.paper-sheet { position: relative; height: 225px; overflow: hidden; background: #F8FAFC; border: 1px solid var(--border); border-radius: 14px; }
.paper-rulers { position: absolute; inset: 12px; border-top: 1px dashed #C9D9EC; border-left: 1px dashed #C9D9EC; }
.paper-content { position: absolute; inset: 28px; display: grid; place-items: center; color: var(--primary); background: linear-gradient(145deg, #EAF3FF, #D9E9FF); border: 2px solid rgba(49,130,246,.4); border-radius: 5px; }
.paper-content::before { content: ''; width: 58px; height: 58px; border-radius: 50%; background: rgba(255,255,255,.65); box-shadow: 35px 35px 0 rgba(255,255,255,.34), -35px 40px 0 rgba(255,255,255,.45); }
.dimension-x, .dimension-y { position: absolute; color: var(--sub); font-size: 8px; font-weight: 600; }
.dimension-x { left: 50%; bottom: 7px; transform: translateX(-50%); }
.dimension-y { top: 50%; left: 4px; transform: translateY(-50%) rotate(-90deg); }
.print-card-foot { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; }
.mini-metric { padding: 10px; background: var(--bg); border-radius: 9px; }
.mini-metric small { display: block; color: var(--sub); font-size: 8px; }
.mini-metric strong { color: #333D4B; font-size: 12px; }
.floating-chip { position: absolute; z-index: 3; display: flex; align-items: center; gap: 8px; padding: 11px 14px; background: #fff; border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 12px 30px rgba(45,77,120,.13); font-size: 11px; font-weight: 700; }
.floating-chip .material-symbols-rounded { color: var(--primary); font-size: 19px; }
.chip-top { top: 32px; right: 2px; }
.chip-bottom { bottom: 35px; left: -8px; }

/* Sections and cards */
.home-section { padding: 92px 0; }
.home-section.white { background: #fff; }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.section-head-row .section-copy { margin-bottom: 0; }
.tools-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.tool-card { position: relative; min-height: 246px; display: flex; flex-direction: column; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 18px; transition: transform .2s, box-shadow .2s, border-color .2s; }
.tool-card:hover { transform: translateY(-5px); border-color: #CFE1FF; box-shadow: 0 18px 36px rgba(42,67,101,.1); }
.tool-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 22px; border-radius: 14px; }
.tool-icon.blue { color: #2878ED; background: #EAF3FF; }
.tool-icon.mint { color: #00A879; background: #E6F9F3; }
.tool-icon.purple { color: #8B5CF6; background: #F1EBFF; }
.tool-icon.orange { color: #F27A38; background: #FFF0E7; }
.tool-icon.pink { color: #E85A88; background: #FFEAF1; }
.tool-card-tag { position: absolute; top: 21px; right: 18px; padding: 4px 7px; color: var(--sub); background: var(--bg); border-radius: 7px; font-size: 8px; font-weight: 700; }
.tool-card h3 { margin-bottom: 9px; font-size: 17px; }
.tool-card p { margin-bottom: 18px; color: var(--sub); font-size: 12px; line-height: 1.65; }
.tool-card .text-link { margin-top: auto; }

.quick-panel { display: grid; grid-template-columns: .85fr 1.15fr; overflow: hidden; background: #fff; border: 1px solid var(--border); border-radius: 24px; box-shadow: 0 18px 50px rgba(46,69,99,.08); }
.quick-copy { padding: 44px; background: linear-gradient(145deg, #F5F9FF, #EEF5FF); }
.quick-copy h2 { font-size: 31px; }
.quick-copy p { color: #6B7684; }
.formula-note { display: flex; align-items: center; gap: 9px; margin-top: 28px; padding: 12px; color: var(--primary-dark); background: rgba(255,255,255,.75); border-radius: 10px; font-size: 11px; font-weight: 600; }
.formula-note .material-symbols-rounded { font-size: 18px; }
.quick-form { padding: 38px 44px; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.form-grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { color: #4E5968; font-size: 12px; font-weight: 600; }
.input-with-unit { position: relative; }
.input-with-unit input { padding-right: 50px; }
.input-unit { position: absolute; top: 50%; right: 14px; color: var(--sub); font-size: 11px; font-weight: 600; transform: translateY(-50%); }
input, select, textarea { width: 100%; color: #333D4B; background: #fff; border: 1px solid var(--border); border-radius: 10px; outline: 0; transition: .15s; }
input, select { height: 48px; padding: 0 14px; }
textarea { min-height: 140px; padding: 14px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(49,130,246,.1); }
.form-actions { display: flex; gap: 8px; margin-top: 22px; }
.result-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-top: 24px; }
.result-box { padding: 14px; background: var(--bg); border-radius: 10px; }
.result-box small { display: block; color: var(--sub); font-size: 9px; font-weight: 600; }
.result-box strong { display: block; margin-top: 3px; color: var(--primary-dark); font-size: 17px; }

.guides-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.guide-card { display: flex; gap: 16px; min-height: 164px; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 16px; transition: .2s; }
.guide-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(42,67,101,.08); }
.guide-icon { flex: 0 0 44px; width: 44px; height: 44px; display: grid; place-items: center; color: var(--primary); background: #EDF5FF; border-radius: 12px; }
.guide-category { color: var(--primary); font-size: 10px; font-weight: 700; }
.guide-card h3 { margin: 5px 0 8px; font-size: 15px; }
.guide-card p { margin: 0; color: var(--sub); font-size: 11px; line-height: 1.55; }
.guide-meta { display: flex; align-items: center; gap: 4px; margin-top: 12px; color: var(--sub); font-size: 9px; }
.guide-meta .material-symbols-rounded { font-size: 14px; }
.ad-slot { margin-top: 42px; padding: 12px 20px; text-align: center; color: #A0A9B4; background: #ECEFF2; border: 1px dashed #D7DBE0; border-radius: 10px; font-size: 9px; letter-spacing: .08em; }

/* Inner pages */
.page-hero { padding: 72px 0 50px; text-align: center; background: #fff; border-bottom: 1px solid var(--border); }
.page-hero .page-icon { width: 58px; height: 58px; display: grid; place-items: center; margin: 0 auto 20px; color: var(--primary); background: #EAF3FF; border-radius: 17px; }
.page-hero h1 { margin-bottom: 13px; font-size: clamp(34px,4vw,50px); }
.page-hero p { max-width: 620px; margin: 0 auto; color: var(--sub); }
.breadcrumbs { display: flex; align-items: center; justify-content: center; gap: 5px; margin-bottom: 18px; color: var(--sub); font-size: 11px; }
.breadcrumbs .material-symbols-rounded { font-size: 14px; }
.page-body { padding: 60px 0 96px; }
.listing-tools { grid-template-columns: repeat(3, 1fr); }
.listing-tools .tool-card { min-height: 224px; }

.calculator-layout { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(300px,.9fr); gap: 24px; align-items: start; }
.calculator-card, .visual-card, .article-card { background: #fff; border: 1px solid var(--border); border-radius: 20px; }
.calculator-card { padding: 30px; }
.calculator-card h2, .visual-card h2 { margin-bottom: 7px; font-size: 21px; }
.card-intro { margin-bottom: 25px; color: var(--sub); font-size: 12px; }
.calculator-card .form-actions .btn { flex: 1; }
.live-result { margin-top: 28px; padding: 22px; color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); border-radius: 15px; box-shadow: 0 14px 28px rgba(49,130,246,.22); }
.live-result-label { display: flex; align-items: center; gap: 6px; margin-bottom: 10px; font-size: 11px; font-weight: 600; opacity: .85; }
.live-result-label .material-symbols-rounded { font-size: 17px; }
.live-result-main { display: flex; align-items: baseline; flex-wrap: wrap; gap: 7px; }
.live-result-main strong { font-size: clamp(28px,4vw,39px); letter-spacing: -.04em; }
.live-result-main span { font-size: 13px; font-weight: 600; opacity: .85; }
.live-result-sub { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 12px; font-size: 11px; opacity: .9; }
.visual-card { position: sticky; top: 96px; overflow: hidden; padding: 26px; }
.visual-stage { min-height: 330px; display: grid; place-items: center; margin-top: 20px; padding: 22px; background: var(--bg); border-radius: 14px; }
.visual-caption { margin: 15px 0 0; color: var(--sub); font-size: 10px; text-align: center; }

.paper-preview { position: relative; width: 210px; height: 297px; padding: 10px; background: #fff; border: 1px solid #D9DEE5; box-shadow: 0 12px 22px rgba(50,64,82,.12); }
.paper-preview::after { content: 'A4'; position: absolute; right: 5px; bottom: 3px; color: #C5CBD2; font-size: 7px; }
.label-grid { width: 100%; height: 100%; display: grid; grid-template-columns: repeat(var(--label-cols, 3),1fr); grid-template-rows: repeat(var(--label-rows, 7),1fr); gap: var(--label-gap, 3px); }
.label-cell { display: grid; place-items: center; color: #83AEED; background: #EAF3FF; border: 1px solid #BFD8FB; border-radius: 2px; font-size: 6px; }

.ratio-preview { position: relative; width: 280px; max-width: 100%; aspect-ratio: 4/3; overflow: hidden; background: linear-gradient(145deg,#CFE3FF,#EAF3FF); border-radius: 9px; }
.ratio-preview::before { content: ''; position: absolute; width: 90px; height: 90px; top: 42px; left: 50%; border-radius: 50%; background: #87B8FA; transform: translateX(-50%); box-shadow: -75px 70px 0 #A9CBF7, 75px 65px 0 #6FA6EE; }
.crop-overlay { position: absolute; inset: 0; border: 4px solid var(--primary); box-shadow: 0 0 0 60px rgba(21,35,53,.42); }
.crop-lines { position: absolute; inset: 33.333% 0; border-top: 1px dashed rgba(255,255,255,.8); border-bottom: 1px dashed rgba(255,255,255,.8); pointer-events: none; }

.bleed-preview { position: relative; width: 260px; max-width: 100%; aspect-ratio: 1.7; display: grid; place-items: center; background: #DCEBFF; border: 2px solid var(--primary); }
.trim-box { position: absolute; inset: 12px; display: grid; place-items: center; background: #fff; border: 1px dashed #E85A88; }
.safe-box { position: absolute; inset: 24px; display: grid; place-items: center; color: var(--primary-dark); background: #F4F8FF; border: 1px dashed #72A9F7; font-size: 11px; font-weight: 700; }
.preview-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 18px; color: var(--sub); font-size: 9px; }
.legend-dot { width: 8px; height: 8px; display: inline-block; margin-right: 4px; border-radius: 50%; }

.frame-preview { position: relative; width: 260px; max-width: 100%; aspect-ratio: .78; padding: 18px; background: #39485B; box-shadow: inset 0 0 0 5px #2B3542, 0 15px 28px rgba(43,53,66,.18); }
.frame-mat { width: 100%; height: 100%; display: grid; place-items: center; padding: 24px; background: #F6F0E5; }
.frame-photo { width: 100%; height: 100%; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg,#78ADEC,#B8D5F8); font-size: 11px; font-weight: 700; }

.detail-sections { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 28px; }
.info-card { padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: 16px; }
.info-card-icon { width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 16px; color: var(--primary); background: #EDF5FF; border-radius: 10px; }
.info-card h3 { margin-bottom: 12px; font-size: 16px; }
.info-card ol, .info-card ul { margin: 0; padding-left: 20px; color: #6B7684; font-size: 12px; }
.info-card li + li { margin-top: 8px; }
.warning-card { border-color: #FFE0D0; background: #FFF9F5; }
.warning-card .info-card-icon { color: #E96A28; background: #FFEBDD; }

.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.filter-bar input { flex: 1 1 260px; }
.filter-bar select { flex: 0 1 180px; }
.glossary-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.term-card { padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 14px; }
.term-card dt { margin-bottom: 7px; color: var(--primary-dark); font-size: 16px; font-weight: 700; }
.term-card dd { margin: 0; color: #6B7684; font-size: 12px; }

.article-card { padding: 38px; }
.article-card h2 { margin-top: 34px; font-size: 22px; }
.article-card h2:first-child { margin-top: 0; }
.article-card p, .article-card li { color: #5F6B7A; }
.article-card li + li { margin-top: 8px; }
.callout { display: flex; gap: 12px; margin: 25px 0; padding: 18px; color: var(--primary-dark); background: #F0F6FF; border-radius: 12px; }
.callout p { margin: 0; color: inherit; font-size: 12px; }
/* Footer */
.site-footer { padding: 54px 0 28px; background: #fff; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, .8fr); gap: 50px; }
.footer-brand p { max-width: 330px; margin-top: 16px; color: var(--sub); font-size: 11px; }
.footer-column h3 { margin-bottom: 14px; font-size: 12px; }
.footer-column a { display: block; width: fit-content; margin: 8px 0; color: var(--sub); font-size: 11px; }
.footer-column a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 42px; padding-top: 22px; color: #A0A9B4; border-top: 1px solid #EEF0F2; font-size: 9px; }

@media (max-width: 1050px) {
  .primary-nav { display: none; }
  .menu-button { display: inline-flex; }
  .tools-grid { grid-template-columns: repeat(3,1fr); }
  .hero-inner { gap: 30px; }
  .guides-grid { grid-template-columns: repeat(2,1fr); }
  .listing-tools { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 760px) {
  body { font-size: 14px; }
  .container, .narrow { width: min(100% - 32px, 1180px); }
  .site-header { height: 64px; }
  .header-inner { gap: 10px; }
  .brand-mark { width: 35px; height: 35px; }
  .brand-text strong { font-size: 15px; }
  .brand-text small { display: none; }
  .header-actions { gap: 6px; }
  .language-button { min-width: 38px; width: 38px; padding: 0; font-size: 0; }
  .language-button .material-symbols-rounded { font-size: 18px; }
  .icon-button, .language-button, .menu-button { height: 38px; }
  .mobile-nav { inset: 64px 0 auto; }
  .desktop-only { display: none; }
  .mobile-only { display: block; }

  .hero-inner { min-height: auto; grid-template-columns: 1fr; gap: 38px; padding-top: 50px; padding-bottom: 54px; }
  .hero h1 { font-size: 41px; }
  .hero-copy { font-size: 14px; }
  .hero-actions .btn { flex: 1 1 170px; }
  .hero-stats { gap: 14px; }
  .stat { flex: 1; padding-right: 14px; }
  .stat strong { font-size: 15px; }
  .stat span { font-size: 9px; }
  .hero-visual { min-height: 370px; }
  .blue-orbit { width: 350px; height: 350px; }
  .print-card { width: 290px; padding: 19px; }
  .paper-sheet { height: 198px; }
  .chip-top { right: -3px; }
  .chip-bottom { left: -3px; }

  .home-section { padding: 68px 0; }
  .section-head-row { align-items: flex-start; flex-direction: column; margin-bottom: 26px; }
  .section-title { font-size: 30px; }
  .tools-grid, .listing-tools { grid-template-columns: 1fr; }
  .tool-card { min-height: 205px; }
  .quick-panel { grid-template-columns: 1fr; }
  .quick-copy, .quick-form { padding: 28px 24px; }
  .form-grid, .form-grid.three { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .result-strip { grid-template-columns: 1fr; }
  .guides-grid { grid-template-columns: 1fr; }

  .page-hero { padding: 48px 0 38px; }
  .page-body { padding: 42px 0 70px; }
  .calculator-layout { grid-template-columns: 1fr; }
  .calculator-card { padding: 23px; }
  .visual-card { position: relative; top: auto; }
  .detail-sections { grid-template-columns: 1fr; }
  .glossary-grid { grid-template-columns: 1fr; }
  .article-card { padding: 25px; }
  .filter-bar select { flex: 1 1 140px; }
  .footer-grid { grid-template-columns: repeat(2,1fr); gap: 32px 20px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 390px) {
  .brand-text { display: none; }
  .hero h1 { font-size: 35px; }
  .hero-stats { flex-direction: column; }
  .stat { padding: 0; }
  .stat::after { display: none; }
  .hero-visual { transform: scale(.9); margin: -18px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}