:root {
  --blue-950: #071d3a;
  --blue-900: #0b2a52;
  --blue-800: #113f73;
  --blue-700: #155ea8;
  --blue-600: #1c74d9;
  --blue-500: #2f8df0;
  --blue-300: #9bd0ff;
  --blue-100: #eaf4ff;
  --blue-050: #f5faff;
  --cyan-100: #e6fbff;
  --ink: #122033;
  --muted: #5c6f86;
  --soft: #f7fbff;
  --line: rgba(17, 63, 115, 0.13);
  --card: rgba(255, 255, 255, 0.90);
  --shadow: 0 22px 70px rgba(7, 29, 58, 0.13);
  --shadow-soft: 0 14px 36px rgba(7, 29, 58, 0.08);
  --radius-xl: 34px;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(47, 141, 240, 0.18), transparent 36rem),
    radial-gradient(circle at top right, rgba(21, 94, 168, 0.12), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, var(--blue-050) 46%, #ffffff 100%);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", Arial, sans-serif;
  line-height: 1.66;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrapper { width: min(1280px, calc(100vw - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid var(--line);
}
.navbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; }
.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-950), var(--blue-500));
  box-shadow: 0 14px 26px rgba(28, 116, 217, 0.24);
  font-weight: 850;
  letter-spacing: -0.06em;
}
.brand-text { display: grid; line-height: 1.14; }
.brand-text strong { font-size: 1.02rem; color: var(--blue-950); letter-spacing: -0.02em; }
.brand-text span { font-size: 0.78rem; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--blue-900);
  font-weight: 720;
  font-size: 0.92rem;
}
.nav-links a:hover,
.nav-links a.active { background: var(--blue-100); color: var(--blue-700); }

.hero { padding: 34px 0 44px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.22fr) minmax(330px, 0.78fr); gap: 28px; align-items: stretch; }
.hero-card,
.panel,
.card,
.cta-box {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius-lg);
}
.hero-card { padding: 44px; min-height: 420px; display: flex; flex-direction: column; justify-content: center; position: relative; overflow: hidden; }
.hero-card::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -80px;
  bottom: -120px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(47, 141, 240, 0.19), transparent 68%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--blue-700);
  background: var(--blue-100);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 18px 0 18px; font-size: clamp(2.3rem, 5vw, 4.6rem); line-height: 1.08; letter-spacing: -0.065em; color: var(--blue-950); }
h1 .accent { color: var(--blue-600); }
.hero-lead { max-width: 760px; color: var(--muted); font-size: 1.08rem; margin-bottom: 28px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 780;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--blue-900), var(--blue-500)); box-shadow: 0 14px 28px rgba(28, 116, 217, 0.22); }
.btn-secondary { color: var(--blue-800); background: #fff; border: 1px solid var(--line); }
.btn-ghost { color: var(--blue-800); background: var(--blue-100); }
.panel { padding: 30px; }
.panel-title { color: var(--blue-950); font-size: 1.22rem; letter-spacing: -0.03em; }
.platform-map { display: grid; gap: 12px; }
.map-item {
  display: grid;
  gap: 5px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, #fff, var(--blue-050));
}
.map-item strong { color: var(--blue-900); }
.map-item span { color: var(--muted); font-size: 0.92rem; }

.carousel-section { padding: 16px 0 34px; }
.full-bleed { width: min(1280px, calc(100vw - 32px)); margin-left: auto; margin-right: auto; }
.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,.58);
  box-shadow: var(--shadow);
  background: var(--blue-950);
}
.carousel-track { display: flex; transition: transform .55s cubic-bezier(.22,.61,.36,1); will-change: transform; }
.carousel-slide {
  min-width: 100%;
  position: relative;
  min-height: clamp(270px, 30vw, 360px);
  isolation: isolate;
  overflow: hidden;
}
.carousel-slide img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.carousel-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7,29,58,.86) 0%, rgba(7,29,58,.64) 43%, rgba(7,29,58,.18) 100%),
    linear-gradient(0deg, rgba(7,29,58,.48), transparent 46%);
  z-index: -1;
}
.slide-content {
  width: min(660px, calc(100% - 96px));
  min-height: inherit;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 34px 0 46px 42px;
  color: #fff;
}
.slide-kicker {
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.26);
  color: #cfe7ff;
  font-weight: 820;
  font-size: .82rem;
  letter-spacing: .03em;
}
.slide-content h2 { margin: 16px 0 16px; font-size: clamp(1.8rem, 3.8vw, 3.3rem); line-height: 1.05; letter-spacing: -0.06em; }
.slide-content p { max-width: 660px; margin-bottom: 14px; color: rgba(255,255,255,.84); font-size: .98rem; }
.slide-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.slide-meta span { padding: 7px 11px; border-radius: 999px; color: #e9f5ff; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.18); font-weight: 740; font-size: .86rem; }
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 64px;
  border: 0;
  border-radius: 16px;
  color: #fff;
  background: rgba(255,255,255,.20);
  backdrop-filter: blur(10px);
  cursor: pointer;
  font-size: 2rem;
  line-height: 1;
}
.carousel-btn:hover { background: rgba(255,255,255,.30); }
.carousel-btn.prev { left: 18px; }
.carousel-btn.next { right: 18px; }
.carousel-dots {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(7,29,58,.50);
  backdrop-filter: blur(12px);
}
.carousel-dots button {
  width: 9px;
  height: 9px;
  border: 0;
  border-radius: 999px;
  background: rgba(255,255,255,.45);
  cursor: pointer;
  padding: 0;
  transition: width .2s ease, background .2s ease;
}
.carousel-dots button.active { width: 30px; background: #fff; }

.section { padding: 58px 0; }
.section-tight { padding-top: 18px; }
.section-heading { max-width: 780px; margin-bottom: 28px; }
.section-heading.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-heading h2 { color: var(--blue-950); font-size: clamp(1.8rem, 3vw, 2.6rem); line-height: 1.14; letter-spacing: -0.055em; margin-bottom: 11px; }
.section-heading p { color: var(--muted); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card { padding: 26px; transition: transform .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card h3 { color: var(--blue-950); font-size: 1.24rem; letter-spacing: -0.035em; margin-bottom: 10px; }
.card p { color: var(--muted); margin-bottom: 16px; }
.icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-900), var(--blue-500));
  font-weight: 860;
  margin-bottom: 18px;
}
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.pill { display: inline-flex; align-items: center; padding: 6px 10px; border-radius: 999px; color: var(--blue-800); background: var(--blue-100); font-size: .82rem; font-weight: 750; }
.more { color: var(--blue-700); font-weight: 820; }
.list-check { display: grid; gap: 12px; padding: 0; margin: 18px 0 0; list-style: none; }
.list-check li { position: relative; padding-left: 28px; color: var(--muted); }
.list-check li::before { content: ""; position: absolute; left: 0; top: .55em; width: 14px; height: 14px; border-radius: 50%; background: linear-gradient(135deg, var(--blue-700), var(--blue-300)); box-shadow: inset 0 0 0 4px #fff; }
.feature-band {
  border-radius: var(--radius-xl);
  padding: 34px;
  background: linear-gradient(135deg, var(--blue-950), var(--blue-700));
  color: #fff;
  overflow: hidden;
  position: relative;
}
.feature-band::after { content:""; position: absolute; right: -120px; top: -120px; width: 360px; height: 360px; border-radius: 50%; background: rgba(255,255,255,.10); }
.feature-band h2 { font-size: clamp(1.8rem, 3vw, 2.7rem); line-height: 1.14; letter-spacing: -0.055em; }
.feature-band p { color: rgba(255,255,255,.78); max-width: 780px; }
.cta-box { padding: 36px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.cta-box h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.05em; color: var(--blue-950); margin-bottom: 8px; }
.cta-box p { color: var(--muted); margin-bottom: 0; }

.page-hero { padding: 34px 0 24px; }
.page-hero .hero-card { min-height: 280px; }
.breadcrumb { color: var(--blue-700); font-weight: 780; margin-bottom: 14px; font-size: .92rem; }
.software-meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 20px; }
.meta-cell { padding: 14px; border-radius: 16px; background: var(--blue-050); border: 1px solid var(--line); }
.meta-cell strong { display: block; color: var(--blue-950); font-size: .88rem; }
.meta-cell span { color: var(--muted); font-size: .86rem; }

.site-footer { padding: 44px 0; border-top: 1px solid var(--line); color: var(--muted); }
.footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; color: var(--blue-800); font-weight: 720; }

@media (max-width: 900px) {
  .navbar { align-items: flex-start; flex-direction: column; padding: 16px 0; gap: 12px; }
  .hero-grid, .grid-2, .grid-3, .software-meta { grid-template-columns: 1fr; }
  .hero-card { padding: 30px; min-height: auto; }
  .slide-content { width: calc(100% - 56px); padding-left: 28px; }
  .carousel-btn { width: 38px; height: 58px; }
  .carousel-btn.prev { left: 10px; }
  .carousel-btn.next { right: 10px; }
  .cta-box { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 560px) {
  .wrapper { width: calc(100vw - 18px); }
  .hero { padding-top: 42px; }
  .full-bleed { width: calc(100vw - 18px); }
  .carousel-slide { min-height: 320px; }
  .slide-content { width: calc(100% - 32px); padding: 28px 0 40px 18px; }
  .slide-content h2 { font-size: 2rem; }
  .slide-content p { font-size: .92rem; }
  .nav-links a { font-size: .86rem; padding: 8px 10px; }
}

.carousel-section.carousel-top { padding-top: 12px; }
.carousel-section.carousel-top + .hero,
.carousel-section.carousel-top + .page-hero { padding-top: 28px; }


/* v4: width alignment with carousel */
.wrapper,
.full-bleed {
  width: min(1280px, calc(100vw - 32px));
}

/* Notice board */
.notice-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.notice-search {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.notice-search input,
.notice-search select,
.notice-form input,
.notice-form select,
.notice-form textarea {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0 14px;
  background: rgba(255,255,255,.92);
  color: var(--ink);
  font: inherit;
  outline: none;
}
.notice-search input { min-width: min(360px, 72vw); }
.notice-search input:focus,
.notice-search select:focus,
.notice-form input:focus,
.notice-form select:focus,
.notice-form textarea:focus {
  border-color: rgba(47,141,240,.55);
  box-shadow: 0 0 0 4px rgba(47,141,240,.10);
}
.notice-list {
  display: grid;
  gap: 14px;
}
.notice-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 160px;
  gap: 16px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,.92);
  box-shadow: var(--shadow-soft);
}
.notice-badge {
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 820;
  font-size: .82rem;
  color: var(--blue-800);
  background: var(--blue-100);
}
.notice-badge.important {
  color: #fff;
  background: linear-gradient(135deg, var(--blue-950), var(--blue-600));
}
.notice-title {
  margin-bottom: 6px;
  color: var(--blue-950);
  font-size: 1.08rem;
  font-weight: 850;
  letter-spacing: -0.02em;
}
.notice-summary {
  color: var(--muted);
  margin: 0;
}
.notice-date {
  color: var(--muted);
  text-align: right;
  font-weight: 720;
  font-size: .92rem;
}
.notice-featured {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 20px;
  align-items: stretch;
}
.notice-featured .card {
  min-height: 100%;
}
.notice-image-box {
  min-height: 320px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 20%, rgba(155,208,255,.55), transparent 34%),
    linear-gradient(135deg, var(--blue-950), var(--blue-600));
  box-shadow: var(--shadow-soft);
  position: relative;
}
.notice-image-box::after {
  content: "NOTICE";
  position: absolute;
  right: 28px;
  bottom: 18px;
  color: rgba(255,255,255,.18);
  font-size: clamp(3rem, 7vw, 7rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.07em;
}
.notice-image-box .notice-image-text {
  position: absolute;
  left: 30px;
  top: 30px;
  right: 30px;
  color: #fff;
}
.notice-image-text h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.05em;
  margin-bottom: 12px;
}
.notice-image-text p {
  color: rgba(255,255,255,.78);
}

/* Admin notice design */
.admin-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, .88fr);
  gap: 20px;
  align-items: start;
}
.notice-form {
  display: grid;
  gap: 14px;
}
.form-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.form-row label {
  color: var(--blue-950);
  font-weight: 820;
  padding-top: 10px;
}
.notice-form textarea {
  min-height: 220px;
  resize: vertical;
  padding: 14px;
  line-height: 1.65;
}
.upload-box {
  min-height: 190px;
  border: 1.5px dashed rgba(21,94,168,.30);
  border-radius: 22px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 22px;
  color: var(--muted);
  background: linear-gradient(180deg, #fff, var(--blue-050));
}
.upload-box strong {
  display: block;
  color: var(--blue-900);
  margin-bottom: 6px;
}
.preview-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.92);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.preview-media {
  min-height: 190px;
  background:
    radial-gradient(circle at 30% 20%, rgba(155,208,255,.6), transparent 36%),
    linear-gradient(135deg, var(--blue-950), var(--blue-600));
  display: grid;
  place-items: center;
  color: rgba(255,255,255,.72);
  font-weight: 850;
}
.preview-media img {
  width: 100%;
  height: 230px;
  object-fit: cover;
}
.preview-body {
  padding: 24px;
}
.preview-body h3 {
  color: var(--blue-950);
  letter-spacing: -0.04em;
  margin-bottom: 10px;
}
.preview-body p {
  color: var(--muted);
  white-space: pre-line;
}
.admin-note {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--blue-050);
  padding: 18px;
  color: var(--muted);
}
.admin-note strong {
  color: var(--blue-900);
}

@media (max-width: 900px) {
  .notice-featured,
  .admin-layout,
  .notice-item {
    grid-template-columns: 1fr;
  }
  .notice-date {
    text-align: left;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .form-row label {
    padding-top: 0;
  }
}
@media (max-width: 560px) {
  .wrapper,
  .full-bleed {
    width: calc(100vw - 18px);
  }
}