/* 배포용 웹북 로비 (루트 index) */

body.webbook--lobby {
  background: #0c1222;
  background-image: none;
  color: #e8ecf4;
}

.webbook--lobby .lobby-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.lobby-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  width: 100%;
}

.lobby-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.lobby-brand__mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 10px;
  background: linear-gradient(145deg, #3b82f6, #1d4ed8);
  box-shadow: 0 4px 14px rgb(29 78 216 / 45%);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}

.lobby-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.lobby-brand__title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.lobby-brand__tagline {
  font-size: 0.6875rem;
  color: #94a3b8;
  font-weight: 500;
}

.lobby-top-nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.lobby-top-nav a {
  font-size: 0.8125rem;
  color: #cbd5e1;
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s;
}

.lobby-top-nav a:hover {
  background: rgb(255 255 255 / 8%);
  color: #fff;
}

.lobby-hero {
  position: relative;
  overflow: hidden;
  padding: 3rem 1.5rem 3.5rem;
}

.lobby-hero__inner {
  max-width: 72rem;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.lobby-hero__glow {
  position: absolute;
  inset: -40% -20% auto;
  height: 120%;
  background: radial-gradient(
    ellipse 70% 55% at 50% 0%,
    rgb(59 130 246 / 35%) 0%,
    transparent 65%
  );
  pointer-events: none;
}

.lobby-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #93c5fd;
  margin-bottom: 1rem;
}

.lobby-hero__eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: #60a5fa;
}

.lobby-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 18ch;
}

.lobby-hero__lead {
  margin: 0 0 1.75rem;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: #94a3b8;
  max-width: 36rem;
}

.lobby-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.lobby-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.7rem 1.25rem;
  border-radius: 10px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
}

.lobby-btn--primary {
  background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgb(37 99 235 / 40%);
}

.lobby-btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgb(37 99 235 / 50%);
}

.lobby-btn--secondary {
  background: rgb(255 255 255 / 8%);
  color: #e2e8f0;
  border: 1px solid rgb(255 255 255 / 12%);
}

.lobby-btn--secondary:hover {
  background: rgb(255 255 255 / 12%);
}

.lobby-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.lobby-pill {
  font-size: 0.8125rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgb(15 23 42 / 60%);
  border: 1px solid rgb(148 163 184 / 20%);
  color: #cbd5e1;
}

.lobby-main {
  flex: 1;
  background: linear-gradient(180deg, #0c1222 0%, #111827 12%, #f1f5f9 28%);
  padding: 0 1.5rem 3rem;
}

.lobby-panel {
  max-width: 72rem;
  margin: -2rem auto 0;
  position: relative;
  z-index: 2;
}

.lobby-section {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgb(15 23 42 / 12%);
  padding: 1.75rem 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.lobby-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.lobby-section h2 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  border: none;
  padding: 0;
}

.lobby-section__sub {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.lobby-section__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.lobby-section__link:hover {
  text-decoration: underline;
}

.lobby-subject-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .lobby-subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .lobby-subject-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.lobby-subject-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.2rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.12s;
}

.lobby-subject-card:hover {
  border-color: #93b4e8;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.lobby-subject-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.lobby-subject-card__title {
  font-size: 1rem;
  font-weight: 650;
  margin: 0;
}

.lobby-subject-card__year {
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  white-space: nowrap;
}

.lobby-subject-card__desc {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.5;
  flex: 1;
}

.lobby-subject-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.lobby-tag {
  font-size: 0.6875rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--muted);
}

.lobby-steps {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .lobby-steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.lobby-step {
  padding: 1rem 0 0;
}

.lobby-step__num {
  display: inline-flex;
  width: 1.75rem;
  height: 1.75rem;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.lobby-step h3 {
  margin: 0 0 0.35rem;
  font-size: 0.9375rem;
}

.lobby-step p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.55;
}

.lobby-footer {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.5rem 2.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: #64748b;
}

.lobby-footer p {
  margin: 0.25rem 0;
}

.lobby-credits {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  max-width: min(20rem, calc(100vw - 2rem));
  font-size: 0.75rem;
  line-height: 1.55;
  color: #64748b;
  text-align: right;
  z-index: 20;
}

.lobby-credits p {
  margin: 0;
}

.lobby-credits p + p {
  margin-top: 0.35rem;
}

.lobby-credits a {
  color: #94a3b8;
  text-decoration: none;
}

.lobby-credits a:hover {
  color: #cbd5e1;
  text-decoration: underline;
}

.lobby-skeleton {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

.webbook--lobby .skip-link {
  background: #2563eb;
}

.webbook--lobby .skip-link:focus {
  left: 1rem;
  top: 1rem;
}