/* ===== 이수정국어 관리 시스템 상세페이지 ===== */

:root {
  --ink: #17171a;
  --ink-2: #4a4a52;
  --ink-3: #7a7a83;
  --gold-deep: #ba7517;
  --gold: #c4972a;
  --gold-mid: #fac775;
  --gold-pale: #ffe9b8;
  --pink: #f5457a;
  --pink-deep: #c22b5c;
  --paper: #faf9f5;
  --cream: #fff8ec;
  --line: rgba(23, 23, 26, 0.08);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  min-width: 320px;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1160px, 100% - 2.5rem); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ===== Nav ===== */

.snav {
  position: fixed; inset: 0 0 auto 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  height: 56px;
  padding: 0 max(1.1rem, env(safe-area-inset-left));
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.snav-brand { display: flex; align-items: center; gap: 0.55rem; }
.snav-brand img { height: 28px; width: auto; }
.snav-brand span {
  font-size: 0.85rem; font-weight: 700; letter-spacing: -0.02em; color: var(--ink);
}
.snav-links { display: flex; align-items: center; gap: 1.1rem; }
.snav-link {
  font-size: 0.83rem; font-weight: 500; color: var(--ink-3);
  transition: color 0.25s var(--ease);
}
.snav-link:hover { color: var(--ink); }
.snav-cta {
  padding: 0.45rem 0.95rem; border-radius: 999px;
  background: linear-gradient(135deg, #ff7da3, var(--pink) 60%, var(--pink-deep));
  color: #fff; font-size: 0.8rem; font-weight: 700;
  box-shadow: 0 6px 16px rgba(245, 69, 122, 0.28);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.snav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(245, 69, 122, 0.34); }

/* ===== Hero ===== */

.shero {
  position: relative; overflow: hidden;
  padding: 8.5rem 0 4.5rem;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 60% at 50% -8%, var(--cream) 0%, transparent 60%),
    radial-gradient(ellipse 40% 34% at 88% 22%, rgba(245, 69, 122, 0.07) 0%, transparent 70%),
    var(--paper);
}
.shero::before {
  content: ""; position: absolute; right: -8%; top: 42%;
  transform: translateY(-50%) rotate(10deg);
  width: min(480px, 48vw); aspect-ratio: 1 / 1.06;
  background: url("./logo-final.png") center / contain no-repeat;
  opacity: 0.045; pointer-events: none;
}
.shero > * { position: relative; z-index: 1; }
.shero-logo {
  width: 60px; margin: 0 auto 1.1rem;
  filter: drop-shadow(0 8px 22px rgba(245, 69, 122, 0.32));
}
.eyebrow {
  display: inline-block;
  font-family: "Montserrat", sans-serif;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.22em;
  color: var(--gold-deep);
  margin-bottom: 1rem;
}
.shero h1 {
  margin: 0 0 1.2rem;
  font-size: clamp(2.1rem, 5.6vw, 3.4rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.2;
}
.gold-shine {
  background: linear-gradient(90deg, var(--gold-deep) 0%, var(--gold-mid) 30%, var(--gold-pale) 50%, var(--gold-mid) 70%, var(--gold-deep) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 3.2s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }

.shero-lead {
  max-width: 620px; margin: 0 auto 2.4rem;
  font-size: clamp(0.95rem, 2.2vw, 1.08rem); line-height: 1.75; color: var(--ink-2);
}
.shero-lead b { color: var(--ink); font-weight: 700; }

.shero-metrics {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem; max-width: 800px; margin: 0 auto 2.2rem;
}
.metric {
  padding: 1.1rem 0.6rem; border-radius: 16px;
  background: linear-gradient(180deg, #fff 0%, #fffaf0 100%) padding-box,
              linear-gradient(180deg, rgba(250, 199, 117, 0.6), rgba(0, 0, 0, 0.06)) border-box;
  border: 1px solid transparent;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 8px 20px rgba(186, 117, 23, 0.07);
}
.metric-num {
  display: block; font-family: "Montserrat", sans-serif;
  font-size: clamp(1.4rem, 4vw, 1.9rem); font-weight: 700; letter-spacing: -0.02em;
  color: var(--gold-deep); line-height: 1.1;
}
.metric-num small { font-size: 0.55em; font-weight: 600; margin-left: 0.1em; }
.metric-label {
  display: block; margin-top: 0.35rem;
  font-size: 0.72rem; font-weight: 500; color: var(--ink-3); letter-spacing: -0.01em;
}

.chapter-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; }
.chip {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.5rem 0.95rem; border-radius: 999px;
  border: 1px solid rgba(186, 117, 23, 0.24);
  background: rgba(255, 255, 255, 0.75);
  font-size: 0.8rem; font-weight: 600; color: var(--ink-2);
  transition: all 0.25s var(--ease);
}
.chip i {
  font-family: "Montserrat", sans-serif; font-style: normal;
  font-size: 0.68rem; font-weight: 700; color: var(--gold-deep);
}
.chip:hover {
  border-color: rgba(186, 117, 23, 0.5); color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(186, 117, 23, 0.12);
}

/* ===== Notice bar ===== */

.notice {
  display: flex; align-items: center; justify-content: center; gap: 0.55rem;
  flex-wrap: wrap; text-align: center;
  padding: 0.85rem 1.25rem;
  background: #17171a; color: rgba(255, 255, 255, 0.82);
  font-size: 0.78rem; letter-spacing: -0.01em;
}
.notice strong { color: var(--gold-mid); font-weight: 700; }

/* ===== Chapter ===== */

.chapter { position: relative; padding: clamp(3.5rem, 8vw, 6rem) 0; }
.chapter--alt { background: #fff; border-block: 1px solid var(--line); }
.chapter--dark {
  background:
    radial-gradient(ellipse 60% 50% at 20% 0%, rgba(250, 199, 117, 0.12), transparent 60%),
    radial-gradient(ellipse 50% 50% at 90% 90%, rgba(245, 69, 122, 0.12), transparent 60%),
    #101014;
  color: #fff;
}
.chapter--dark .ch-lead, .chapter--dark .point p { color: rgba(255, 255, 255, 0.68); }
.chapter--dark .point { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.1); }
.chapter--dark .point h3 { color: #fff; }
.chapter--dark .shot-cap { color: rgba(255, 255, 255, 0.5); }
.chapter--dark .ch-title { color: #fff; }

.ch-head { max-width: 760px; margin-bottom: clamp(2rem, 4vw, 3rem); }
.ch-index {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 50px; margin-bottom: 1rem;
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  background: linear-gradient(160deg, #ff7da3 0%, var(--pink) 55%, var(--pink-deep) 100%);
  color: #fff; font-family: "Montserrat", sans-serif;
  font-size: 1.05rem; font-weight: 700;
  box-shadow: 0 10px 22px rgba(245, 69, 122, 0.24);
}
.ch-kicker {
  display: block; margin-bottom: 0.55rem;
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--gold-deep);
}
.chapter--dark .ch-kicker { color: var(--gold-mid); }
.ch-title {
  margin: 0 0 0.9rem;
  font-size: clamp(1.5rem, 3.8vw, 2.25rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.3;
  color: var(--ink);
}
.ch-title em { font-style: normal; color: var(--pink); }
.chapter--dark .ch-title em { color: #ff90b3; }
.ch-lead {
  margin: 0; font-size: clamp(0.92rem, 2.1vw, 1.03rem);
  line-height: 1.8; color: var(--ink-2);
}
.ch-lead b { color: var(--ink); font-weight: 700; }
.chapter--dark .ch-lead b { color: #fff; }

/* 스크린샷 프레임 */
.shot { margin: 0; }
.frame {
  position: relative;
  border-radius: 18px; overflow: hidden;
  background: #fff;
  border: 1px solid rgba(23, 23, 26, 0.1);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05), 0 20px 50px rgba(23, 23, 26, 0.13);
}
.chapter--dark .frame {
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
}
.frame-bar {
  display: flex; align-items: center; gap: 0.55rem;
  padding: 0.6rem 0.85rem;
  background: #f2f2f4; border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}
.frame-dots { display: flex; gap: 0.32rem; }
.frame-dots i { width: 9px; height: 9px; border-radius: 50%; background: #d5d5da; }
.frame-dots i:first-child { background: #ff6058; }
.frame-dots i:nth-child(2) { background: #ffc02e; }
.frame-dots i:nth-child(3) { background: #29ca41; }
.frame-url {
  flex: 1; text-align: center;
  font-size: 0.68rem; color: #90909a; letter-spacing: 0.01em;
}
.frame img { width: 100%; }

.shot-cap {
  margin: 0.85rem 0 0; text-align: center;
  font-size: 0.78rem; line-height: 1.6; color: var(--ink-3);
}

/* 포인트 카드 */
.points { display: grid; gap: 0.75rem; }
.point {
  display: flex; gap: 0.8rem; align-items: flex-start;
  padding: 1rem 1.15rem; border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(186, 117, 23, 0.16);
}
.point-mark {
  flex: none; width: 26px; height: 26px; border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--gold-mid), var(--gold-deep));
  color: #fff; font-family: "Montserrat", sans-serif;
  font-size: 0.72rem; font-weight: 700;
}
.point h3 { margin: 0 0 0.28rem; font-size: 0.94rem; font-weight: 700; letter-spacing: -0.02em; }
.point p { margin: 0; font-size: 0.83rem; line-height: 1.65; color: var(--ink-2); }

/* 레이아웃: 텍스트 + 이미지 */
.split { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: clamp(1.5rem, 4vw, 3.2rem); align-items: start; }
.split--rev > .split-media { order: -1; }
.split-side { position: sticky; top: 84px; }

.stack { display: grid; gap: 1.5rem; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }

/* 폰 프레임 */
.phone-row { display: flex; justify-content: center; align-items: flex-start; gap: clamp(1rem, 3vw, 2.5rem); flex-wrap: wrap; }
.phone { width: min(280px, 44vw); }
.phone-shell {
  border-radius: 30px; padding: 9px;
  background: linear-gradient(150deg, #34343c, #16161a 60%, #26262c);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3), 0 24px 55px rgba(0, 0, 0, 0.3);
}
.chapter--dark .phone-shell { box-shadow: 0 3px 8px rgba(0,0,0,.5), 0 28px 60px rgba(0, 0, 0, 0.6); }
.phone-screen {
  position: relative; border-radius: 22px; overflow: hidden; background: #fff;
}
.phone-status {
  display: block; position: relative; height: 26px; background: #16161a;
}
.phone-status::before {
  content: ""; position: absolute; top: 5px; left: 50%; transform: translateX(-50%);
  width: 62px; height: 15px; border-radius: 999px; background: #2c2c33;
}
.phone-screen img { width: 100%; }
.phone-tag {
  display: block; margin-top: 0.75rem; text-align: center;
  font-size: 0.78rem; font-weight: 600; color: var(--ink-2);
}
.chapter--dark .phone-tag { color: rgba(255, 255, 255, 0.72); }
.phone-tag small { display: block; margin-top: 0.2rem; font-weight: 400; font-size: 0.72rem; color: var(--ink-3); }
.chapter--dark .phone-tag small { color: rgba(255, 255, 255, 0.45); }

/* 하이라이트 태그 줄 */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.15rem; }
.tag {
  padding: 0.35rem 0.7rem; border-radius: 999px;
  background: rgba(186, 117, 23, 0.09);
  border: 1px solid rgba(186, 117, 23, 0.18);
  font-size: 0.75rem; font-weight: 600; color: var(--gold-deep);
}
.chapter--dark .tag {
  background: rgba(250, 199, 117, 0.12); border-color: rgba(250, 199, 117, 0.28); color: var(--gold-mid);
}

/* ===== 마무리 ===== */

.closing {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 60% at 50% 0%, var(--cream), transparent 60%),
    var(--paper);
}
.closing h2 {
  margin: 0 0 1rem; font-size: clamp(1.5rem, 4vw, 2.3rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.35;
}
.closing p { margin: 0 auto 2rem; max-width: 560px; font-size: 0.98rem; line-height: 1.8; color: var(--ink-2); }
.closing-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.6rem; border-radius: 999px;
  font-size: 0.92rem; font-weight: 700;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn--primary {
  background: linear-gradient(135deg, #ff7da3, var(--pink) 60%, var(--pink-deep));
  color: #fff; box-shadow: 0 12px 28px rgba(245, 69, 122, 0.28);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(245, 69, 122, 0.36); }
.btn--ghost {
  background: #fff; color: var(--ink);
  border: 1px solid rgba(23, 23, 26, 0.12);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
}
.btn--ghost:hover { transform: translateY(-2px); }

.footer {
  padding: 2.5rem 1.5rem 3rem; text-align: center;
  background: #fff; border-top: 1px solid var(--line);
}
.footer img { width: 40px; margin: 0 auto 0.85rem; opacity: 0.9; }
.footer p { margin: 0.3rem 0; font-size: 0.82rem; color: var(--ink-3); }
.footer .phones a { color: var(--ink-2); font-weight: 600; }
.footer .copy { font-size: 0.72rem; color: #a5a5ad; margin-top: 0.9rem; }

/* ===== Reveal ===== */

.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: 0.09s; }
.reveal[data-d="2"] { transition-delay: 0.18s; }
.reveal[data-d="3"] { transition-delay: 0.27s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ===== Responsive ===== */

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split--rev > .split-media { order: 0; }
  .split-side { position: static; }
  .pair { grid-template-columns: 1fr; }
  .snav-links .snav-link { display: none; }
  .snav-links .snav-link--back { display: inline; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { width: calc(100% - 1.8rem); }
  .shero { padding: 7rem 0 3rem; }
  .shero-metrics { grid-template-columns: repeat(2, 1fr); }
  .phone { width: min(300px, 78vw); }
  .frame { border-radius: 14px; }
}