/* 10기 KG 스터디 현황판 — Cloud Club. 하늘 그라데이션 위에 떠 있는 구름 카드. 테두리는 없고, 그림자는 하늘색으로 은은하게. */
:root {
  --sky-900: #0f3562;
  --sky-700: #1e5fb8;
  --sky-500: #3b8beb;
  --sky-300: #9ccdf8;
  --sky-200: #cfe6fb;
  --sky-100: #e7f3fe;
  --sky-50: #f4f9ff;

  --cloud: #ffffff;
  --cloud-2: rgba(255, 255, 255, 0.78);
  --ink: var(--sky-900);
  --muted: #5d7797;
  --line: rgba(30, 95, 184, 0.14);

  --sun: #ffd166;
  --sun-2: #ffe7a3;
  --coral: #ff7a90;
  --mint: #35c39a;
  --lavender: #8f7bff;
  --peach: #ffa14d;
  --teal: #1fb6c8;

  --border: 1px solid rgba(255, 255, 255, 0.9);
  --shadow: 0 10px 30px rgba(30, 95, 184, 0.12), 0 1px 3px rgba(30, 95, 184, 0.06);
  --shadow-lg: 0 20px 48px rgba(30, 95, 184, 0.2), 0 2px 6px rgba(30, 95, 184, 0.08);
  --radius: 22px;
  --radius-sm: 12px;

  --font-display: "Jua", "IBM Plex Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-body: "IBM Plex Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --text-hero: clamp(3rem, 1.4rem + 7vw, 6.5rem);
  --text-h2: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem);
  --text-base: clamp(0.98rem, 0.92rem + 0.3vw, 1.06rem);

  --space-page: clamp(1rem, 0.5rem + 3vw, 3.5rem);
  --space-section: clamp(3rem, 2rem + 3.5vw, 5.5rem);
  --gap: clamp(0.9rem, 0.6rem + 1vw, 1.4rem);

  --duration: 180ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--sky-100);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--sky-700); }
:focus-visible { outline: 3px solid var(--sky-500); outline-offset: 3px; border-radius: 6px; }

code {
  font-family: var(--font-mono); font-size: 0.9em;
  padding: 0.05em 0.35em; border-radius: 4px; background: var(--sky-100); color: var(--sky-700);
}

.skip { position: absolute; left: 1rem; top: -4rem; padding: 0.5rem 1rem; background: var(--sun); border-radius: var(--radius-sm); z-index: 100; }
.skip:focus { top: 1rem; }

/* ------------------------------------------------------------------ sky */
.sky {
  position: fixed; inset: 0; z-index: -1; overflow: hidden;
  background: linear-gradient(180deg, #a9d5fa 0%, #cfe7fc 38%, #e9f4fe 70%, #f6fbff 100%);
}
.cloud {
  --w: 220px;
  position: absolute; left: -30vw; top: var(--top, 10%);
  width: var(--w); height: calc(var(--w) * 0.34);
  background: var(--cloud); border-radius: 999px;
  opacity: var(--o, 0.9);
  filter: drop-shadow(0 14px 22px rgba(30, 95, 184, 0.1));
  animation: drift var(--dur, 140s) linear infinite;
  animation-delay: var(--delay, 0s);
  will-change: transform;
}
.cloud::before, .cloud::after { content: ""; position: absolute; background: inherit; border-radius: 50%; }
.cloud::before { width: calc(var(--w) * 0.46); height: calc(var(--w) * 0.46); left: calc(var(--w) * 0.13); bottom: calc(var(--w) * 0.12); }
.cloud::after { width: calc(var(--w) * 0.32); height: calc(var(--w) * 0.32); left: calc(var(--w) * 0.5); bottom: calc(var(--w) * 0.15); }
.cloud--1 { --w: 300px; --top: 6%; --dur: 170s; --delay: -40s; }
.cloud--2 { --w: 180px; --top: 18%; --dur: 120s; --delay: -95s; --o: 0.75; }
.cloud--3 { --w: 240px; --top: 34%; --dur: 200s; --delay: -150s; --o: 0.6; }
.cloud--4 { --w: 140px; --top: 52%; --dur: 150s; --delay: -20s; --o: 0.55; }
.cloud--5 { --w: 260px; --top: 68%; --dur: 220s; --delay: -110s; --o: 0.5; }
.cloud--6 { --w: 200px; --top: 84%; --dur: 180s; --delay: -70s; --o: 0.6; }
@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(calc(100vw + 60vw)); }
}

/* --------------------------------------------------------------- shared */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.45em;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono); font-weight: 700; font-size: 0.8rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--sky-700);
}
.eyebrow::before { content: ""; width: 1.1em; height: 0.75em; background: currentColor; -webkit-mask: var(--cloud-mask) center / contain no-repeat; mask: var(--cloud-mask) center / contain no-repeat; }
:root { --cloud-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 22'%3E%3Cpath d='M9 22a7 7 0 0 1-1.4-13.86A9 9 0 0 1 24.9 8.1 6.5 6.5 0 0 1 25 22H9z'/%3E%3C/svg%3E"); }

.sticker {
  display: inline-block; padding: 0.1em 0.7em;
  border-radius: 999px;
  background: var(--sun); color: var(--sky-900);
  box-shadow: 0 4px 12px rgba(255, 190, 60, 0.35);
  font-family: var(--font-display); font-size: 1rem; line-height: 1.5; letter-spacing: 0.02em;
  white-space: nowrap;
}

.panel {
  position: relative;
  background: var(--cloud-2);
  border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}

.btn {
  display: inline-flex; align-items: center; gap: 0.35em;
  padding: 0.5em 1.05em;
  border: 0; border-radius: 999px;
  background: var(--sky-500); color: #fff;
  box-shadow: 0 6px 16px rgba(59, 139, 235, 0.35);
  font: inherit; font-weight: 700; font-size: 0.88rem; text-decoration: none; cursor: pointer;
  transition: background var(--duration) ease, color var(--duration) ease, transform var(--duration) var(--ease-out), box-shadow var(--duration) ease;
}
.btn:hover { background: var(--sky-700); color: #fff; transform: translateY(-1px); box-shadow: 0 10px 22px rgba(30, 95, 184, 0.35); }
.btn--ghost { background: transparent; color: var(--sky-700); box-shadow: none; text-decoration: underline; text-underline-offset: 3px; }
.btn--ghost:hover { background: var(--sky-100); color: var(--sky-900); transform: none; box-shadow: none; }

.chip {
  display: inline-block; padding: 0 0.5em; border-radius: 999px;
  background: var(--c, var(--sky-500)); color: #fff;
  font-size: 0.78rem; font-weight: 700; white-space: nowrap;
}

/* ----------------------------------------------------------------- hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  grid-template-areas: "text digest" "stats stats";
  gap: var(--gap);
  align-items: end;
  padding: calc(var(--space-page) + 2rem) var(--space-page) var(--space-page);
  max-width: 1320px; margin: 0 auto;
}
.hero__text { grid-area: text; }
.hero__title {
  position: relative; margin: 0;
  font-family: var(--font-display); font-weight: 400;
  font-size: var(--text-hero); line-height: 1; letter-spacing: -0.01em;
  color: var(--sky-900);
  text-shadow: 0 2px 0 #fff, 0 12px 30px rgba(30, 95, 184, 0.18);
}
.hero__line { position: relative; display: inline-block; }
.sticker--hero {
  position: absolute; top: -0.55em; left: calc(100% - 0.15em);
  font-size: clamp(0.95rem, 0.6rem + 1.3vw, 1.4rem);
  background: var(--coral); color: #fff; box-shadow: 0 6px 16px rgba(255, 122, 144, 0.4);
  text-shadow: none;
  transform: rotate(8deg);
}
.hero__lead { margin: 1.1rem 0 0; font-size: 1.05rem; color: var(--muted); }

.digest {
  grid-area: digest;
  padding: 1.2rem 1.4rem 1.3rem;
  background: var(--cloud-2);
  border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.digest__label {
  display: inline-flex; align-items: center; gap: 0.45em;
  margin-bottom: 0.55rem; padding: 0.1em 0.7em;
  background: var(--sky-500); color: #fff; border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em;
}
.digest__label::before { content: ""; width: 1.2em; height: 0.85em; background: currentColor; -webkit-mask: var(--cloud-mask) center / contain no-repeat; mask: var(--cloud-mask) center / contain no-repeat; }
.digest__text { margin: 0; font-size: 1.02rem; font-weight: 500; line-height: 1.55; }
.digest__shoutouts { list-style: none; margin: 0.7rem 0 0; padding: 0; display: grid; gap: 0.25rem; }
.digest__shoutouts:empty { display: none; }
.digest__shoutouts li { font-size: 0.88rem; color: var(--muted); padding-left: 1.2em; position: relative; }
.digest__shoutouts li::before { content: "☀"; position: absolute; left: 0; color: var(--peach); }

.stats {
  grid-area: stats; list-style: none; margin: 0.6rem 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: var(--gap);
}
.stat {
  --stat-accent: var(--sky-500);
  position: relative;
  padding: 0.85rem 1.1rem 0.7rem;
  border: var(--border); border-radius: var(--radius); background: var(--cloud-2);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
}
.stat::after {
  content: ""; position: absolute; right: -18px; bottom: -22px; width: 74px; height: 50px;
  background: var(--stat-accent); opacity: 0.16;
  -webkit-mask: var(--cloud-mask) center / contain no-repeat; mask: var(--cloud-mask) center / contain no-repeat;
}
.stat__value { display: block; font-family: var(--font-display); font-size: clamp(1.8rem, 1.3rem + 1.5vw, 2.6rem); line-height: 1.05; color: var(--stat-accent); }
.stat__label { display: block; margin-top: 0.1rem; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; color: var(--muted); }

/* ------------------------------------------------------------- sections */
main { max-width: 1320px; margin: 0 auto; padding: 0 var(--space-page) var(--space-section); }
.section { margin-top: var(--space-section); }
.section__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.4rem 1rem; margin-bottom: 1.1rem; }
.section__title {
  display: inline-flex; align-items: center; gap: 0.4em;
  margin: 0; font-family: var(--font-display); font-weight: 400; font-size: var(--text-h2); line-height: 1.05;
  color: var(--sky-900);
}
.section__title::before { content: ""; flex: none; width: 0.9em; height: 0.62em; background: var(--sky-500); -webkit-mask: var(--cloud-mask) center / contain no-repeat; mask: var(--cloud-mask) center / contain no-repeat; }
.section__hint { margin: 0; color: var(--muted); font-size: 0.9rem; }

/* ----------------------------------------------------------------- feed */
.section--feed { margin-top: calc(var(--space-section) * 0.6); }
.feed__source {
  padding: 0 0.65em; border: 1.5px dashed var(--sky-500); border-radius: 999px; color: var(--sky-700);
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700;
}
.posts {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 500px), 1fr)); gap: var(--gap);
}
.post {
  --accent: var(--sky-500);
  position: relative;
  display: flex; flex-direction: column; gap: 0.85rem;
  padding: 1.5rem 1.5rem 1.3rem;
  background: var(--cloud-2);
  border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out);
}
.post::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--accent); }
.post:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.post.is-new {
  grid-column: 1 / -1; padding: 1.8rem 1.8rem 1.5rem;
  background: linear-gradient(135deg, var(--sky-500) 0%, var(--sky-700) 100%);
  color: #fff; border-color: transparent;
  box-shadow: 0 20px 48px rgba(30, 95, 184, 0.35);
}
.post.is-new::before { background: var(--sun); }
.post.is-new::after {
  content: ""; position: absolute; right: -40px; bottom: -50px; width: 260px; height: 180px;
  background: #fff; opacity: 0.1;
  -webkit-mask: var(--cloud-mask) center / contain no-repeat; mask: var(--cloud-mask) center / contain no-repeat;
  pointer-events: none;
}

.post__head { display: flex; align-items: center; gap: 0.8rem; }
.post__avatar {
  flex: none; width: 42px; height: 42px; border-radius: 50%;
  border: 3px solid #fff; background: var(--accent); object-fit: cover;
  box-shadow: 0 4px 12px rgba(30, 95, 184, 0.2);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.15rem; color: #fff; text-transform: uppercase;
}
.post__who { min-width: 0; display: flex; flex-direction: column; gap: 0.1rem; }
.post__name { font-family: var(--font-display); font-size: 1.15rem; line-height: 1.1; text-decoration: none; }
.post__name:hover { text-decoration: underline; }
.post.is-new .post__name:hover { color: var(--sun-2); }
.post__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; color: var(--muted); }
.post.is-new .post__meta { color: rgba(255, 255, 255, 0.8); }
.post__meta > * + *::before { content: "·"; margin-right: 0.45rem; color: var(--line); }
.post__new { padding: 0 0.55em; border-radius: 999px; background: var(--sun); color: var(--sky-900); }
.post__new::before { display: none; }

.post__text { margin: 0; font-size: clamp(1.1rem, 1rem + 0.35vw, 1.28rem); font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
.post.is-new .post__text { font-size: clamp(1.35rem, 1.05rem + 1.2vw, 1.9rem); font-weight: 700; line-height: 1.35; }

.post__quote {
  margin: 0; padding: 0.6rem 0.9rem;
  border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--sky-50);
  font-size: 0.95rem; color: var(--muted); line-height: 1.55;
}
.post.is-new .post__quote { color: #fff; border-left-color: var(--sun); background: rgba(255, 255, 255, 0.12); }

.post__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; margin-top: auto; padding-top: 0.2rem; }
.post__attach {
  display: inline-flex; align-items: center; gap: 0.4em;
  padding: 0.3em 0.8em;
  border: 1.5px solid var(--sky-200); border-radius: 999px;
  background: #fff; color: var(--sky-700);
  font-size: 0.86rem; font-weight: 700; text-decoration: none;
  transition: background var(--duration) ease, color var(--duration) ease, border-color var(--duration) ease;
}
a.post__attach:hover { background: var(--sky-500); border-color: var(--sky-500); color: #fff; }
span.post__attach { border-style: dashed; color: var(--muted); }
.post.is-new .post__attach { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.4); color: #fff; }
.post.is-new a.post__attach:hover { background: #fff; color: var(--sky-700); }
.post__commit { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; color: var(--muted); text-decoration: none; overflow-wrap: anywhere; }
.post__commit:hover { color: var(--sky-700); text-decoration: underline; }
span.post__commit { font-weight: 500; }
.post.is-new .post__commit { color: rgba(255, 255, 255, 0.85); }
.post.is-new .post__commit:hover { color: #fff; }
.post__stats { color: var(--mint); }
.post__count { color: var(--peach); font-weight: 700; }
.post.is-new .post__count { color: var(--sun-2); }
.post.is-new .post__stats { color: var(--sun-2); }
.post__stats::before { color: var(--line); }
.post__tags { font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: var(--muted); overflow-wrap: anywhere; }
.post.is-new .post__tags { color: rgba(255, 255, 255, 0.85); }
.feed__empty { grid-column: 1 / -1; padding: 1.2rem; color: var(--muted); }

/* ------------------------------------------------------------- readings */
.readings { padding: 0.3rem 0; }
.readings__empty { margin: 0; padding: 1rem 1.1rem; color: var(--muted); }
.readings__group { border-bottom: 1.5px solid var(--line); }
.readings__group:last-child { border-bottom: 0; }
.readings__week {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.3rem 0.8rem;
  padding: 0.8rem 1.1rem; cursor: pointer; list-style: none;
}
.readings__week::-webkit-details-marker { display: none; }
.readings__week::before { content: "▸"; color: var(--muted); transition: transform var(--duration) ease; }
.readings__group[open] > .readings__week::before { transform: rotate(90deg); }
.readings__week:hover { background: var(--sky-50); }
.readings__group:first-child > .readings__week { border-radius: var(--radius) var(--radius) 0 0; }
.readings__name { font-family: var(--font-display); font-size: 1.25rem; line-height: 1.1; }
.readings__label { font-weight: 700; }
.readings__range { font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--muted); }
.readings__badge { padding: 0 0.6em; border-radius: 999px; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; line-height: 1.7; }
.readings__badge--now { background: var(--sun); color: var(--sky-900); }
.readings__badge--future { background: #fff; color: var(--coral); border: 1.5px dashed var(--coral); }
.readings__group.is-current > .readings__week { background: var(--sky-50); }
.readings__group.is-future > .readings__week .readings__name { color: var(--muted); }
.readings__now {
  padding: 0 0.7em; border: 1.5px dashed var(--sky-500); border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; line-height: 1.8; color: var(--sky-700);
}
.readings__count { margin-left: auto; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; color: var(--muted); }
.readings__items { list-style: none; margin: 0; padding: 0 1.1rem 0.8rem; display: grid; gap: 0.45rem; }
.reading { display: grid; grid-template-columns: auto 1fr; align-items: baseline; gap: 0.7rem; padding: 0.4rem 0.7rem; border-left: 3px solid var(--c, var(--sky-500)); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: var(--sky-50); }
.reading__who { text-decoration: none; }
.reading__who:hover { color: #fff; filter: brightness(0.9); }
.reading__body { min-width: 0; }
.reading__title { font-weight: 700; text-decoration: none; overflow-wrap: anywhere; }
a.reading__title:hover { text-decoration: underline; }
.reading__meta { display: block; margin-top: 0.05rem; font-size: 0.84rem; color: var(--muted); overflow-wrap: anywhere; }
@media (max-width: 560px) {
  .readings__count { margin-left: 0; flex-basis: 100%; }
  .reading { grid-template-columns: 1fr; gap: 0.2rem; }
  .reading__who { justify-self: start; }
}

/* ---------------------------------------------------------------- graph */
.panel--graph { padding: 0.75rem; overflow: hidden; }
.graph { position: relative; width: 100%; min-height: 320px; border-radius: var(--radius-sm); }
.graph svg { display: block; width: 100%; height: auto; touch-action: none; }
.graph .link { stroke: var(--cohort-accent, var(--sky-700)); stroke-width: 1.5; stroke-opacity: 0.28; transition: stroke-opacity var(--duration) ease; }
.graph .node circle { stroke: #fff; stroke-width: 2.5; filter: drop-shadow(0 3px 6px rgba(30, 95, 184, 0.22)); }
.graph .node--member circle { stroke-width: 3.5; }
.graph .node--note circle { fill: #fff; stroke: var(--sky-300); }
.graph .node--lab circle { fill: var(--mint); }
.graph .node--topic circle { fill: var(--sun); }
.graph .node text {
  font-family: var(--font-mono); font-weight: 700; font-size: 12px;
  fill: var(--ink); paint-order: stroke; stroke: #fff; stroke-width: 4px; stroke-linejoin: round;
  pointer-events: none;
}
.graph .node--member text { font-family: var(--font-display); font-size: 15px; }
.graph.is-compact .node text { font-size: 10px; }
.graph.is-compact .node--member text { font-size: 13px; }
.graph .node { cursor: grab; transition: opacity var(--duration) ease; }
.graph .node:active { cursor: grabbing; }
.graph.has-focus .node.is-dim { opacity: 0.15; }
.graph.has-focus .link.is-dim { stroke-opacity: 0.06; }
.graph.has-focus .link.is-lit { stroke-opacity: 0.9; stroke-width: 2.5; }
.graph .node--note:hover circle, .graph .node--lab:hover circle { stroke-width: 4; }
.graph .node.is-focused circle { stroke: var(--cohort-accent, var(--sky-700)); stroke-width: 4; }

.graph__pop {
  position: absolute; z-index: 2; max-width: min(320px, calc(100% - 8px));
  padding: 0.7rem 0.85rem 0.75rem;
  background: #fff; border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.86rem; line-height: 1.4;
}
.graph__pop::before {
  content: ""; position: absolute; left: 50%; top: -6px; width: 12px; height: 12px;
  background: #fff; transform: translateX(-50%) rotate(45deg); border-radius: 2px;
}
.graph__pop.is-above::before { top: auto; bottom: -6px; }
.graph__pop-head { display: flex; align-items: baseline; gap: 0.45em; margin-bottom: 0.4rem; }
.graph__pop-kind { flex: none; padding: 0 0.5em; border-radius: 999px; background: var(--sky-100); color: var(--sky-700); font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; }
.graph__pop-title { font-weight: 700; overflow-wrap: anywhere; }
.graph__pop-tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.3rem; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; }
.graph__pop-tags li { padding: 0.05em 0.6em; border-radius: 999px; border: 1.5px dashed var(--sky-300); color: var(--muted); }
.graph__pop-tags li.is-drawn { padding: 0; border: 0; }
.graph__pop-tags li.is-drawn button {
  padding: 0.05em 0.6em; border: 1.5px solid var(--sun); border-radius: 999px;
  background: var(--sun); color: var(--sky-900); font: inherit; cursor: pointer;
}
.graph__pop-tags li.is-drawn button:hover { background: var(--sun-2); }
.graph__pop-empty { margin: 0; color: var(--muted); }
.graph__pop-link { display: inline-block; margin-top: 0.5rem; color: var(--sky-700); font-weight: 700; text-decoration: none; }
.graph__pop-link:hover { text-decoration: underline; }

.graph__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 1.2rem; padding: 0.5rem 0.4rem 0.1rem; }
.graph__hidden { font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; color: var(--muted); }
.switch {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-left: auto;
  font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--muted); cursor: pointer; user-select: none;
}
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch__track { position: relative; width: 32px; height: 18px; border-radius: 999px; background: var(--sky-200); transition: background var(--duration) ease; }
.switch__track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(30, 95, 184, 0.3); transition: transform var(--duration) var(--ease-out); }
.switch input:checked + .switch__track { background: var(--cohort-accent, var(--sky-500)); }
.switch input:checked + .switch__track::after { transform: translateX(14px); }
.switch input:focus-visible + .switch__track { outline: 3px solid var(--sky-500); outline-offset: 2px; }
.legend {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem;
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: var(--muted);
}
.legend li { display: inline-flex; align-items: center; gap: 0.4rem; }
.dot { width: 12px; height: 12px; border: 2px solid #fff; border-radius: 50%; display: inline-block; box-shadow: 0 1px 3px rgba(30, 95, 184, 0.3); }
.dot--member { background: var(--cohort-accent, var(--sky-500)); }
.dot--note { background: #fff; border-color: var(--sky-300); }
.dot--lab { background: var(--mint); }
.dot--topic { background: var(--sun); }
.graph__empty {
  position: absolute; inset: auto 1rem 3rem auto;
  margin: 0; padding: 0.45rem 0.9rem;
  border-radius: 999px; background: var(--sun); box-shadow: 0 6px 16px rgba(255, 190, 60, 0.35);
  font-size: 0.88rem; font-weight: 500;
}

/* -------------------------------------------------------------- cohorts */
/* 반마다 강조색(--cohort-accent)이 다르다. A반 하늘, B반 노을, C반 풀밭. 패널 배경·리본·선·스위치가 그 색을 따른다. */
.cohorts { display: grid; gap: var(--gap); }
.cohort {
  --cohort-accent: var(--sky-500);
  position: relative;
  background: color-mix(in srgb, var(--cohort-accent) 7%, rgba(255, 255, 255, 0.86));
  border-color: color-mix(in srgb, var(--cohort-accent) 30%, #fff);
}
.cohort::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 6px; background: var(--cohort-accent); }
.cohort__head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem; padding: 0.7rem 0.5rem 0.6rem; }
.sticker--cohort {
  background: var(--cohort-accent); color: #fff; font-size: 1.05rem; padding: 0 0.75em;
  box-shadow: 0 6px 14px color-mix(in srgb, var(--cohort-accent) 40%, transparent);
  transform: rotate(-2deg);
}
.cohort__avatars { display: flex; align-items: center; }
.cohort__avatars img, .cohort__avatars span {
  flex: none; width: 28px; height: 28px; margin-left: -8px; border-radius: 50%;
  border: 2px solid #fff; background: var(--c, var(--cohort-accent)); object-fit: cover;
  box-shadow: 0 2px 6px color-mix(in srgb, var(--cohort-accent) 35%, transparent);
}
.cohort__avatars span { display: inline-grid; place-items: center; color: #fff; font-family: var(--font-display); font-size: 0.8rem; text-transform: uppercase; }
.cohort__avatars > :first-child { margin-left: 0; }
.cohort__meta { font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--muted); }
.cohort .graph { background: rgba(255, 255, 255, 0.55); }
.cohort .graph__empty { background: var(--cohort-accent); color: #fff; box-shadow: 0 6px 16px color-mix(in srgb, var(--cohort-accent) 40%, transparent); }

.cohort--next {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.8rem 1rem;
  padding: 1rem 1.3rem; overflow: visible;
  background: color-mix(in srgb, var(--cohort-accent) 5%, rgba(255, 255, 255, 0.6));
  border: 2px dashed color-mix(in srgb, var(--cohort-accent) 55%, #fff); box-shadow: none;
  backdrop-filter: none; -webkit-backdrop-filter: none;
}
.cohort--next::before { display: none; }
.cohort--next .sticker--cohort { opacity: 0.9; }
.cohort__next-text { margin: 0; color: var(--muted); font-size: 0.92rem; }

.members__cohort {
  --cohort-accent: var(--sky-500);
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 0.7rem;
  margin: 0.2rem 0 -0.3rem; font-weight: 400;
}
.members__cohort:not(:first-child) { margin-top: 1rem; }
.members__cohort::after { content: ""; flex: 1; height: 3px; border-radius: 999px; background: color-mix(in srgb, var(--cohort-accent) 28%, #fff); }
.members__cohort-meta { font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--muted); }
.card__handle { display: block; margin-top: 0.1rem; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; color: var(--muted); }
.card__cohort {
  flex: none; padding: 0 0.55em; border-radius: 999px;
  border: 1.5px solid var(--cohort-accent, var(--sky-500)); color: var(--cohort-accent, var(--sky-500));
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; line-height: 1.6;
}

/* -------------------------------------------------------------- members */
.members { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: var(--gap); }
.card {
  --accent: var(--sky-500);
  position: relative;
  display: flex; flex-direction: column; gap: 0.95rem;
  padding: 1.5rem 1.3rem 1.2rem;
  background: var(--cloud-2);
  border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out);
}
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--accent); }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card.is-idle { --accent: var(--sky-300); }

.card__head { display: flex; align-items: center; gap: 0.85rem; }
.card__avatar {
  flex: none; width: 56px; height: 56px; border-radius: 50%;
  border: 3px solid #fff; background: var(--accent); object-fit: cover;
  box-shadow: 0 4px 12px rgba(30, 95, 184, 0.22);
}
.card__who { min-width: 0; flex: 1; }
.card__title-tag {
  display: inline-block; max-width: 100%; padding: 0 0.6em; border-radius: 999px;
  background: var(--accent); color: #fff;
  font-size: 0.76rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card__name { margin: 0.15rem 0 0; font-family: var(--font-display); font-weight: 400; font-size: 1.5rem; line-height: 1.1; }
.card__name a { text-decoration: none; }
.card__name a:hover { text-decoration: underline; }
.sticker--level { flex: none; font-size: 0.9rem; }

.card__summary { margin: 0; font-size: 0.96rem; }
.card__highlights { list-style: none; margin: -0.4rem 0 0; padding: 0; display: grid; gap: 0.2rem; font-size: 0.86rem; color: var(--muted); }
.card__highlights:empty { display: none; }
.card__highlights li { padding-left: 1em; position: relative; }
.card__highlights li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }

.xp__meta { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; color: var(--muted); margin-bottom: 0.3rem; }
.xp__bar { height: 12px; border-radius: 999px; background: var(--sky-100); box-shadow: inset 0 1px 3px rgba(30, 95, 184, 0.15); overflow: hidden; }
.xp__fill { height: 100%; width: 100%; transform-origin: left center; transform: scaleX(var(--fill, 0)); background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 65%, #fff)); border-radius: 999px; transition: transform 800ms var(--ease-out); }

.counts { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0.55rem 0; border-top: 1.5px solid var(--line); border-bottom: 1.5px solid var(--line); }
.counts div { text-align: center; }
.counts dt { font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.05em; color: var(--muted); }
.counts dd { margin: 0; font-family: var(--font-display); font-size: 1.35rem; line-height: 1.1; color: var(--sky-900); }
.counts dd small { font-size: 0.6em; font-family: var(--font-body); font-weight: 500; }

.heatmap-wrap { display: flex; align-items: flex-end; gap: 0.6rem; }
.heatmap {
  display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 10px); grid-auto-columns: 10px; gap: 3px;
  padding: 6px; border-radius: var(--radius-sm); background: var(--sky-50); overflow-x: auto; max-width: 100%;
}
.heatmap i { display: block; width: 10px; height: 10px; border-radius: 3px; background: var(--sky-100); }
.heatmap i.l1 { background: color-mix(in srgb, var(--accent) 40%, #fff); }
.heatmap i.l2 { background: color-mix(in srgb, var(--accent) 72%, #fff); }
.heatmap i.l3 { background: var(--accent); }
.heatmap__caption { font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; color: var(--muted); white-space: nowrap; }

.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.3rem 0.4rem; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; }
.tags:empty { display: none; }
.tags li { padding: 0 0.6em; border-radius: 999px; background: var(--sky-100); color: var(--sky-700); }

.items__title { margin: 0.2rem 0 0.35rem; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.items__list { list-style: none; margin: 0 0 0.5rem; padding: 0; display: grid; gap: 0.3rem; }
.items__list li { padding: 0.4rem 0.7rem; border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: var(--sky-50); }
.items__list li.is-empty { border-left-color: var(--sky-200); color: var(--muted); font-size: 0.86rem; }
.items__list li.is-more { border-left-color: transparent; background: transparent; padding: 0.1rem 0.7rem; font-size: 0.84rem; }
.item__title { font-weight: 700; text-decoration: none; }
.item__title:hover { text-decoration: underline; }
.item__meta { display: block; font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); margin-top: 0.05rem; }
.item__summary { margin: 0.15rem 0 0; font-size: 0.85rem; color: var(--muted); }

.card__foot { display: flex; flex-wrap: wrap; gap: 0.4rem 0.6rem; justify-content: flex-end; align-items: center; margin-top: auto; padding-top: 0.2rem; }

/* ------------------------------------------------------------- activity */
.activity { list-style: none; margin: 0; padding: 0.3rem 0; }
.activity li { display: grid; grid-template-columns: auto auto 1fr; align-items: baseline; gap: 0.8rem; padding: 0.6rem 1.2rem; border-bottom: 1.5px solid var(--line); }
.activity li:last-child { border-bottom: 0; }
.activity li.is-empty { grid-template-columns: 1fr; color: var(--muted); }
.activity__date { font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: var(--muted); white-space: nowrap; }
.activity__who { font-weight: 700; color: var(--c, var(--sky-500)); white-space: nowrap; font-size: 0.9rem; }
.activity__msg { min-width: 0; overflow-wrap: anywhere; text-decoration: none; }
.activity__msg:hover { text-decoration: underline; }
@media (max-width: 560px) {
  .activity li { grid-template-columns: auto 1fr; }
  .activity__msg { grid-column: 1 / -1; }
}

/* --------------------------------------------------------------- footer */
.footer {
  max-width: 1320px; margin: 0 auto; padding: 1.4rem var(--space-page) 3rem;
  border-top: 1.5px solid var(--line);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem;
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted);
}
.footer p { margin: 0; }
.footer a:hover { color: var(--sky-700); }

.toast {
  position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%);
  max-width: min(90vw, 560px); padding: 0.8rem 1.1rem;
  background: var(--coral); color: #fff;
  border-radius: var(--radius-sm); box-shadow: 0 12px 30px rgba(255, 122, 144, 0.4);
  font-weight: 700; z-index: 50;
}

/* ----------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; grid-template-areas: "text" "digest" "stats"; align-items: start; }
  .digest { margin-top: 0.8rem; }
  
/* ---------------------------------------------------------- motion prefs */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation: none !important; }
  .cloud { left: var(--rest, 10vw); }
  .cloud--1 { --rest: 8vw; }
  .cloud--2 { --rest: 62vw; }
  .cloud--3 { --rest: 30vw; }
  .cloud--4 { --rest: 78vw; }
  .cloud--5 { --rest: 15vw; }
  .cloud--6 { --rest: 55vw; }
}