/* =========================================================
   K-CAS 대한민국 문화예술 지원 시스템 - k-cas.kr
   글자 크기: rem 기준 (접근성 글자 크기 조절 대응)
   ========================================================= */

:root {
  --navy: #23277d;        /* K-CAS 워드마크 진남색 */
  --navy-dark: #1a1d5e;
  --blue: #4a7ebb;        /* 보조 강조 */
  --blue-soft: #eef3fa;
  --teal: #17877f;
  --orange: #e8702a;
  --ink: #20242e;
  --ink-soft: #4c5261;
  --line: #e3e6ec;
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(32, 38, 76, 0.08);
  --font: "Noto Sans KR", "Pretendard", -apple-system, "Malgun Gothic", sans-serif;
}

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

/* 접근성: 글자 크기 조절 (js/main.js에서 data-font-scale 적용) */
html { font-size: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
html[data-font-scale="112"] { font-size: 112%; }
html[data-font-scale="125"] { font-size: 125%; }
html[data-font-scale="140"] { font-size: 140%; }

/* 접근성: 색상 반전(고대비) */
html[data-contrast="high"] { filter: invert(1) hue-rotate(180deg); background: #111; }
html[data-contrast="high"] img,
html[data-contrast="high"] svg,
html[data-contrast="high"] video,
html[data-contrast="high"] iframe { filter: invert(1) hue-rotate(180deg); }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  word-break: keep-all;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* 키보드 초점 표시 */
a:focus-visible, button:focus-visible, input:focus-visible,
textarea:focus-visible, summary:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

/* 본문 바로가기 */
.skip-link {
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  background: var(--navy-dark);
  color: #fff;
  padding: 10px 22px;
  border-radius: 0 0 10px 10px;
  font-weight: 700;
  z-index: 300;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

.container {
  width: min(1160px, 100% - 40px);
  margin-inline: auto;
}

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  font-size: 1.625rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--navy);
}

.brand-divider {
  width: 2px;
  height: 34px;
  background: var(--navy);
  opacity: 0.85;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 0.9375rem; font-weight: 700; color: var(--ink); }
.brand-text small { font-size: 0.66rem; color: #767b8c; letter-spacing: 0.1px; }

.gnb { display: flex; align-items: center; gap: 24px; }
.gnb a { font-size: 0.9375rem; font-weight: 500; color: var(--ink-soft); transition: color 0.2s; }
.gnb a:hover { color: var(--navy); }

.nav-cta {
  background: var(--navy);
  color: #fff !important;
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 700 !important;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--navy-dark); }

/* 접근성 버튼 */
.a11y-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid #c9d4e8;
  border-radius: 999px;
  padding: 8px 14px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
  transition: 0.2s;
  white-space: nowrap;
}
.a11y-toggle:hover { border-color: var(--navy); background: var(--blue-soft); }
.a11y-toggle span { font-size: 0.9375rem; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span { width: 22px; height: 2px; background: var(--ink); transition: 0.2s; }

/* ---------- 접근성 설정 패널 ---------- */
.a11y-panel {
  position: fixed;
  top: 84px;
  right: 20px;
  z-index: 200;
  width: min(330px, calc(100vw - 40px));
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(32, 38, 76, 0.18);
  padding: 20px;
}

.a11y-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.a11y-head h2 { font-size: 1.125rem; font-weight: 800; color: var(--navy-dark); }

.a11y-close {
  background: none;
  border: 0;
  font-size: 1.375rem;
  line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 4px 8px;
}
.a11y-close:hover { color: var(--ink); }

.a11y-desc { font-size: 0.8125rem; color: var(--ink-soft); margin-bottom: 16px; }

.a11y-sub { font-size: 0.875rem; font-weight: 700; margin-bottom: 8px; }

.a11y-fontsize {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}

.a11y-fontsize button {
  border: 1px solid #cfd6e2;
  background: #fff;
  border-radius: 8px;
  padding: 8px 2px;
  font-family: inherit;
  font-size: 0.6875rem;
  color: var(--ink-soft);
  cursor: pointer;
  line-height: 1.35;
  transition: 0.15s;
}
.a11y-fontsize button .ga { display: block; font-weight: 800; color: var(--ink); margin-bottom: 2px; }
.a11y-fontsize .g1 { font-size: 0.875rem; }
.a11y-fontsize .g2 { font-size: 1rem; }
.a11y-fontsize .g3 { font-size: 1.125rem; }
.a11y-fontsize .g4 { font-size: 1.25rem; }
.a11y-fontsize button[aria-pressed="true"] {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}
.a11y-fontsize button[aria-pressed="true"] .ga { color: #fff; }

.a11y-contrast { margin-bottom: 16px; }

.switch-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  gap: 12px;
}

.switch { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; }
.switch input { opacity: 0; width: 100%; height: 100%; position: absolute; margin: 0; cursor: pointer; }
.slider {
  position: absolute;
  inset: 0;
  background: #c4cad6;
  border-radius: 999px;
  transition: 0.2s;
  pointer-events: none;
}
.slider::before {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: 0.2s;
}
.switch input:checked + .slider { background: var(--navy); }
.switch input:checked + .slider::before { transform: translateX(20px); }
.switch input:focus-visible + .slider { outline: 3px solid var(--orange); outline-offset: 2px; }

.a11y-note { font-size: 0.75rem; color: var(--ink-soft); margin-top: 6px; }

.a11y-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.a11y-foot .a11y-note { margin-top: 0; flex: 1; }

.a11y-reset {
  border: 1px solid #cfd6e2;
  background: #fff;
  border-radius: 8px;
  padding: 8px 14px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}
.a11y-reset:hover { border-color: var(--navy); color: var(--navy); }

/* ---------- 히어로 ---------- */
.hero {
  background: linear-gradient(160deg, #f3f6fc 0%, #e8eef9 55%, #eef6f5 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 88px 0 96px;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: #3d6ba8;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(1.875rem, 4.2vw, 2.875rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.8px;
  color: var(--navy-dark);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--ink-soft);
  max-width: 540px;
  margin-bottom: 24px;
}

.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }

.badge {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--navy);
  background: #fff;
  border: 1px solid #d8e0ef;
  padding: 6px 14px;
  border-radius: 999px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  border: 0;
  cursor: pointer;
  transition: 0.2s;
  font-family: inherit;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-dark); transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--navy); border: 1px solid #c9d4e8; }
.btn-ghost:hover { border-color: var(--navy); }
.btn-block { width: 100%; }

/* 히어로 흐름 카드 */
.flow-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  border-top: 4px solid var(--navy);
}

.flow-title { font-size: 0.9375rem; font-weight: 700; color: var(--navy); margin-bottom: 16px; }

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  counter-reset: flow;
  margin-bottom: 16px;
}

.flow-steps li {
  counter-increment: flow;
  background: var(--blue-soft);
  border-radius: 8px;
  padding: 12px 6px 10px;
  text-align: center;
  font-size: 0.844rem;
  font-weight: 700;
  color: var(--ink);
}

.flow-steps li::before {
  content: counter(flow, decimal-leading-zero);
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #3d6ba8;
  margin-bottom: 3px;
}

.flow-note { font-size: 0.8125rem; color: var(--ink-soft); }

/* ---------- 공통 섹션 ---------- */
.section { padding: 92px 0; }
.section-alt { background: var(--bg-alt); }

.section-eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: #3d6ba8;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.625rem, 3vw, 2.125rem);
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--navy-dark);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.03rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: 40px;
}

/* ---------- 시스템 소개 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  margin-top: 12px;
}

.about-text p { font-size: 1.03rem; color: var(--ink-soft); margin-bottom: 18px; }
.about-text p:last-child { margin-bottom: 0; }

.about-points { display: flex; flex-direction: column; gap: 16px; }

.point-card {
  background: var(--blue-soft);
  border-left: 4px solid var(--navy);
  border-radius: 0 10px 10px 0;
  padding: 20px 22px;
}
.point-card h3 { font-size: 1.0625rem; font-weight: 700; color: var(--navy-dark); margin-bottom: 6px; }
.point-card p { font-size: 0.906rem; color: var(--ink-soft); }

/* ---------- 주요 기능 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: 0.25s;
}
.feature-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #d3dbe9; }

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 0.875rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.f-blue { background: #3d6ba8; }
.f-teal { background: var(--teal); }
.f-orange { background: #d95f1c; }
.f-navy { background: var(--navy); }

.feature-card h3 { font-size: 1.094rem; font-weight: 700; margin-bottom: 8px; color: var(--ink); }
.feature-card p { font-size: 0.906rem; color: var(--ink-soft); }

/* ---------- 도입 효과 ---------- */
.effect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 20px;
}

.effect-card {
  background: linear-gradient(150deg, #f7f9fd, #eef3fa);
  border: 1px solid #e0e7f2;
  border-radius: var(--radius);
  padding: 30px 28px;
}
.effect-card h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 10px;
  padding-left: 14px;
  border-left: 4px solid var(--teal);
}
.effect-card p { font-size: 0.9375rem; color: var(--ink-soft); }

/* ---------- 도입 절차 ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.process-steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  position: relative;
}

.step-no {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.process-steps h3 { font-size: 1.094rem; font-weight: 700; margin-bottom: 6px; }
.process-steps p { font-size: 0.906rem; color: var(--ink-soft); }

/* ---------- 운영 사례 ---------- */
.case-feature {
  background: #fff;
  border: 1px solid #d8e0ef;
  border-left: 6px solid var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px 34px;
  display: grid;
  grid-template-columns: 0.9fr 1.5fr;
  gap: 36px;
  margin-bottom: 20px;
}

.case-feature-head h3 {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--navy-dark);
  letter-spacing: -0.5px;
}

.case-feature-body > p { font-size: 1rem; color: var(--ink-soft); margin-bottom: 20px; }

.case-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.case-points li {
  background: var(--blue-soft);
  border-radius: 10px;
  padding: 14px 16px;
}
.case-points li strong {
  display: block;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 4px;
}
.case-points li span { font-size: 0.8125rem; color: var(--ink-soft); line-height: 1.45; display: block; }

.case-sub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.case-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.case-label {
  font-size: 0.781rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #3d6ba8;
  margin-bottom: 10px;
}

.case-card h3 { font-size: 1.1875rem; font-weight: 800; color: var(--navy-dark); margin-bottom: 10px; }
.case-card p { font-size: 0.906rem; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; }

.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-list summary {
  padding: 18px 22px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: #3d6ba8;
}
.faq-list details[open] summary::after { content: "-"; }
.faq-list details p {
  padding: 0 22px 18px;
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

/* ---------- 문의 ---------- */
.contact-section { background: linear-gradient(170deg, #fff 0%, #eef3fa 100%); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.contact-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
}

.form-row { margin-bottom: 18px; }
.form-row-half { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.form-row label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 7px;
}
.form-row label em {
  font-style: normal;
  font-size: 0.719rem;
  color: #c85310;
  font-weight: 700;
  margin-left: 4px;
}

.form-row input[type="text"],
.form-row input[type="tel"],
.form-row input[type="email"],
.form-row textarea {
  width: 100%;
  border: 1px solid #cfd6e2;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--ink);
  transition: border 0.2s;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(35, 39, 125, 0.1);
}
.form-row textarea { resize: vertical; }

.form-agree label {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--ink-soft);
  line-height: 1.5;
}
.form-agree input { margin-top: 3px; }

.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-result { margin-top: 14px; font-size: 0.906rem; font-weight: 700; }
.form-result.ok { color: var(--teal); }
.form-result.error { color: #c0281f; }

.contact-info { padding: 8px 4px; }
.contact-info h3 { font-size: 1.25rem; font-weight: 800; color: var(--navy-dark); margin-bottom: 12px; }
.contact-info > p { font-size: 0.969rem; color: var(--ink-soft); margin-bottom: 20px; }

.company-block { margin-bottom: 22px; }
.company-block h4 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--navy);
  margin-bottom: 4px;
}
.company-block ul li {
  font-size: 0.906rem;
  color: var(--ink-soft);
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}
.company-block ul li strong { color: var(--ink); margin-right: 8px; }
.company-block a { color: #3d6ba8; font-weight: 700; }
.company-block a:hover { text-decoration: underline; }

/* ---------- 푸터 ---------- */
.site-footer {
  background: var(--navy-dark);
  color: #c5c9e2;
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand .brand-mark { color: #fff; font-size: 1.375rem; }
.footer-brand-text { font-size: 0.781rem; line-height: 1.5; }
.footer-info { text-align: right; font-size: 0.8125rem; line-height: 1.7; }
.footer-copy { font-size: 0.8125rem; }

/* ---------- 반응형 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; padding: 64px 0 72px; }
  .hero-visual { max-width: 520px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .effect-grid { grid-template-columns: 1fr; }
  .case-feature { grid-template-columns: 1fr; gap: 20px; padding: 28px 24px; }
  .case-points { grid-template-columns: 1fr; }
  .footer-info { text-align: left; }
}

@media (max-width: 720px) {
  .gnb {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    gap: 0;
  }
  .gnb.open { display: flex; }
  .gnb a { padding: 13px 4px; border-bottom: 1px solid var(--bg-alt); }
  .gnb .nav-cta { margin-top: 12px; text-align: center; border-radius: 10px; }
  .menu-toggle { display: flex; }
  .a11y-toggle { margin-left: auto; }
  .brand-text strong { font-size: 0.8125rem; }
  .brand-text small { display: none; }
  .process-steps, .case-sub-grid { grid-template-columns: 1fr; }
  .form-row-half { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .flow-steps { grid-template-columns: repeat(4, 1fr); }
  .a11y-panel { top: 80px; right: 12px; }
}