:root {
  /* 접근성용 기본 폰트 크기 */
  --base-font-size: 18px; /* 전체 기준: 18px (기본 16px -> 18px) */

  --bg-top: #050a1d;
  --bg-mid: #12133a;
  --bg-bot: #3b1a72;

  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);

  --card: rgba(255, 255, 255, 0.06);
  --stroke: rgba(255, 255, 255, 0.14);

  --accent1: #ff4fd8;
  --accent2: #8a5cff;
  --accent3: #58d4ff;

  --radius: 18px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  /* 1rem == var(--base-font-size) */
  font-size: var(--base-font-size);
  /* 페이지가 길어져도 배경이 끊기지 않도록 html에도 동일 배경 적용 */
  background:
    radial-gradient(900px 450px at 62% 20%, rgba(170, 85, 255, 0.22), transparent 70%),
    radial-gradient(700px 380px at 14% 35%, rgba(90, 210, 255, 0.18), transparent 65%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 45%, var(--bg-bot) 100%);
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family:
    "Noto Sans KR",
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    "Helvetica Neue",
    Arial,
    "Apple SD Gothic Neo",
    "Malgun Gothic",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 450px at 62% 20%, rgba(170, 85, 255, 0.22), transparent 70%),
    radial-gradient(700px 380px at 14% 35%, rgba(90, 210, 255, 0.18), transparent 65%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 45%, var(--bg-bot) 100%);
  overflow-x: hidden;
  /* 접근성용 기본 텍스트 크기 */
  font-size: 1rem; /* 1rem == 18px */
  line-height: 1.6;
}

/* 네비/브랜드/히어로 등 가독성 향상 규칙 (기본값을 덮어쓰기) */
.nav-link {
  font-size: 1rem; /* 약 18px */
  padding: 8px 6px;
}

.brand-title {
  font-size: 1.05rem; /* ~19px */
}

.brand-sub {
  font-size: 0.95rem; /* ~17px */
}

.hero-title {
  /* 기존 clamp 기반에서 rem 단위로 확장 (더 큼) */
  font-size: clamp(2.6rem, 5.2vw, 4.0rem); /* 2.6rem(~46.8px) ~ 4.0rem(~72px) */
  line-height: 1.06;
}

.hero-title--sm {
  /* index.html 전용: hero-title의 0.8배 */
  font-size: clamp(2.08rem, 4.16vw, 3.2rem);
}

.hero-desc {
  font-size: 1.05rem; /* ~19px */
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78); /* 대비 약간 증가 */
}

.btn {
  font-size: 1rem; /* 18px */
  padding: 14px 22px;
}

.toast-title {
  font-size: 1rem;
}

.toast-body {
  font-size: 0.95rem;
}

@media (max-width: 480px) {
  /* 아주 작은 화면에서만 기준 축소 */
  html {
    font-size: 16px;
  }
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 10px;
  padding: 10px 14px;
  background: #111;
  color: #fff;
  border-radius: 10px;
  z-index: 999;
}

.skip-link:focus {
  left: 16px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(
    180deg,
    rgba(5, 10, 29, 0.75) 0%,
    rgba(5, 10, 29, 0.35) 100%
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-avatar {
  display: grid;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  padding: 0;
  background: transparent;
  box-shadow: none;
  place-items: center;
}

.brand-avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: url("./assets/brand-mark.png") center / cover no-repeat;
  border: none;
  display: grid;
  place-items: center;
}

.brand-text {
  display: grid;
  line-height: 1.05;
}

.brand-title {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.26rem; /* ~1.2x */
}

.brand-sub {
  font-weight: 700;
  font-size: 1.14rem; /* ~1.2x */
  opacity: 0.9;
}

.nav {
  display: flex;
  gap: 26px;
  align-items: center;
  white-space: nowrap;
}

.nav-link {
  font-size: 1.2rem; /* ~1.2x */
  padding: 8px 6px;
  color: rgba(255, 255, 255, 0.82);
  transition: color 160ms ease, transform 160ms ease;
}

.nav-link:hover {
  color: rgba(255, 255, 255, 0.98);
  transform: translateY(-1px);
}

.nav-auth {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: 6px;
}

.nav-user {
  font-weight: 900;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: -0.01em;
  font-size: 1.2rem; /* 메뉴와 균형 */
}

.nav-logout {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 900;
  font-size: 1.14rem; /* ~1.2x */
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.nav-logout:hover {
  background: rgba(255, 255, 255, 0.085);
  transform: translateY(-1px);
}

.nav-logout:active {
  transform: translateY(0);
}

.nav-link.is-active {
  color: rgba(255, 255, 255, 0.98);
  position: relative;
}

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: -10px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 79, 216, 0.95), rgba(138, 92, 255, 0.95));
  box-shadow: 0 10px 30px rgba(138, 92, 255, 0.25);
}

/* Hero */
.page {
  min-height: calc(100vh - 78px);
}

/* Courses pages */
.courses-section,
.course-section {
  padding: 44px 0 70px;
}

.page-head {
  margin-bottom: 18px;
}

.page-title {
  margin: 0 0 8px;
  font-size: 2.1rem;
  letter-spacing: -0.02em;
}

.page-sub {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.65;
  font-size: 1.05rem;
}

.muted {
  color: rgba(255, 255, 255, 0.66);
}

.course-grid {
  display: grid;
  grid-template-columns: 1fr; /* 1*1 */
  gap: 18px;
}

.course-card {
  display: grid;
  grid-template-columns: 1fr; /* 세로형 */
  gap: 16px;
  padding: 22px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.18);
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
  height: 100%;
  grid-template-rows: auto 1fr;
}

.course-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.075);
  border-color: rgba(255, 255, 255, 0.20);
}

.course-thumb {
  width: 100%;
  height: 320px; /* 썸네일 크게 */
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(140px 90px at 20% 25%, rgba(255, 79, 216, 0.22), transparent 65%),
    radial-gradient(160px 100px at 70% 65%, rgba(138, 92, 255, 0.22), transparent 70%),
    rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  place-items: center;
}

.course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.course-body {
  display: flex;
  flex-direction: column;
  align-content: start;
  gap: 12px;
  min-width: 0;
}

.course-title {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.course-desc {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.55;
  font-size: 1.08rem;
}

.course-meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.98rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.18);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.badge-primary {
  border-color: rgba(138, 92, 255, 0.45);
  background: rgba(138, 92, 255, 0.14);
}

.badge-success {
  border-color: rgba(90, 255, 160, 0.35);
  background: rgba(90, 255, 160, 0.12);
}

.badge-neutral {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.12);
  color: rgba(255, 255, 255, 0.86);
}

.course-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: auto;
}

/* Catalog readability: 2-column only on wide screens + uniform card heights */
@media (min-width: 1080px) {
  .course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* Reduce visual dominance in 2-col (info-first cards) */
  .course-thumb {
    height: 300px;
  }

  /* Clamp text to keep card heights consistent */
  .course-title,
  .course-desc {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .course-title {
    line-clamp: 2;
    -webkit-line-clamp: 2;
    min-height: calc(1.25em * 2);
  }

  .course-desc {
    line-clamp: 3;
    -webkit-line-clamp: 3;
    min-height: calc(1.55em * 3);
  }

  /* Meta row: keep chips clean and readable */
  .course-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }
}

.featured-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.featured-card {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.20);
}

.featured-badge-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

/* Featured cards: avoid "card-in-card" outline/shadow overflow */
.featured-card .course-card {
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
  height: auto;
}

.featured-card .course-card:hover {
  transform: none;
  background: transparent;
  border-color: transparent;
}

.category-section {
  margin-top: 26px;
}

.category-title {
  margin: 0 0 12px;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.category-nav {
  margin: 14px 0 0;
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.category-chip {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.14);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 900;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.category-chip:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.07);
}

.category-chip.is-active {
  border-color: rgba(138, 92, 255, 0.5);
  background: rgba(138, 92, 255, 0.16);
}

.btn-sm {
  padding: 12px 16px;
  font-size: 1rem;
}

.back-link {
  display: inline-flex;
  margin: 6px 0 14px;
  color: rgba(255, 255, 255, 0.86);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.course-header {
  display: grid;
  gap: 10px;
  padding: 18px 18px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.16);
}

.course-header-title {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.course-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 18px;
  margin-top: 18px;
}

.course-panel {
  margin-top: 18px;
  padding: 18px 18px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
}

.panel-title {
  margin: 0 0 12px;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.lesson-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 12px;
}

.lesson-nav-mobile {
  display: none;
  gap: 10px;
  overflow-x: auto;
  padding: 2px 2px 10px;
  margin: 0 0 10px;
  scroll-snap-type: x proximity;
}

.lesson-chip {
  scroll-snap-align: start;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 10px 12px;
  font-weight: 900;
  font-size: 1.02rem;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.lesson-chip:hover {
  background: rgba(255, 255, 255, 0.085);
  transform: translateY(-1px);
}

.lesson-chip.is-active {
  border-color: rgba(255, 79, 216, 0.6);
  background: rgba(255, 79, 216, 0.12);
}

.lesson-chip.is-locked {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.lesson-chip.is-free {
  border-color: rgba(90, 255, 160, 0.35);
  background: rgba(90, 255, 160, 0.08);
}

.lesson-chip.is-locked:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: none;
}

.lesson-outline {
  margin-top: 14px;
}

.lesson-outline-list {
  display: grid;
  gap: 8px;
}

.lesson-outline-item {
  display: grid;
  gap: 6px;
  padding: 10px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.lesson-outline-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.lesson-outline-item.is-active {
  border-color: rgba(138, 92, 255, 0.55);
  background: rgba(138, 92, 255, 0.12);
}

.lesson-outline-item.is-locked {
  opacity: 0.65;
  cursor: not-allowed;
}

.lesson-outline-item.is-free {
  border-color: rgba(90, 255, 160, 0.35);
  background: rgba(90, 255, 160, 0.06);
}

.lesson-outline-item.is-locked:hover {
  background: rgba(0, 0, 0, 0.12);
  transform: none;
}

.lesson-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(90, 255, 160, 0.35);
  background: rgba(90, 255, 160, 0.1);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 900;
  font-size: 0.82rem;
  margin-left: 8px;
  vertical-align: middle;
  white-space: nowrap;
}

.lesson-outline-title {
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.92);
}

.lesson-outline-sub {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.55;
}

.lesson-admin-table {
  display: grid;
  gap: 10px;
}

.lesson-admin-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
}

.lesson-admin-main {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.lesson-admin-actions {
  flex: 0 0 auto;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.lesson-anim {
  animation: lesson-in 220ms ease;
}

.lesson-anim[data-dir="next"] {
  animation-name: lesson-in-next;
}

.lesson-anim[data-dir="prev"] {
  animation-name: lesson-in-prev;
}

@keyframes lesson-in-next {
  from {
    opacity: 0.6;
    transform: translateX(10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes lesson-in-prev {
  from {
    opacity: 0.6;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.video-box {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.24);
  min-height: 260px;
  display: grid;
  place-items: center;
  padding: 14px;
}

.video-box video {
  width: 100%;
  max-height: 520px;
  border-radius: 14px;
}

.locked {
  text-align: center;
}

.locked-title {
  margin: 0 0 8px;
  font-weight: 900;
  font-size: 1.25rem;
}

.locked-sub {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
}

.course-side-card {
  padding: 18px 18px;
}

.side-title {
  margin: 0 0 10px;
  font-weight: 900;
  font-size: 1.25rem;
}

.side-meta {
  display: grid;
  gap: 10px;
  color: rgba(255, 255, 255, 0.82);
}

.side-meta-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
}

.side-cta {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

/* --- Pricing table (lesson sidebar) --- */
.pricing-table {
  display: grid;
  gap: 0;
}
.pricing-title {
  margin: 0;
  padding: 6px 0 4px;
  font-weight: 800;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.plan-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.10);
  margin-bottom: 6px;
  transition: background 0.18s;
}
.plan-row:hover {
  background: rgba(255, 255, 255, 0.06);
}
.plan-row--rec {
  border-color: var(--accent, #7c3aed);
  background: rgba(124, 58, 237, 0.12);
}
.plan-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 600;
}
.plan-price {
  font-weight: 900;
  font-size: 1.05rem;
  white-space: nowrap;
}
.plan-tag {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--accent, #7c3aed);
  color: #fff;
}
.plan-buttons {
  display: grid;
  gap: 8px;
}
.plan-buttons .btn {
  width: 100%;
  justify-content: center;
  text-align: center;
  font-size: 0.92rem;
}
.plan-rec-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.18);
  vertical-align: middle;
}

/* 단품/카테고리 선택(드롭다운) */
.plan-switch {
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(0, 0, 0, 0.10);
}
.plan-switch-label {
  font-weight: 800;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 6px;
}
.plan-switch-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}
.plan-switch-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.16);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 700;
}
.plan-switch-sub {
  font-size: 0.92rem;
  line-height: 1.5;
}
.plan-info-btn {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 900;
  cursor: pointer;
}
.plan-info-btn:hover {
  background: rgba(255, 255, 255, 0.10);
}

/* 카테고리 설명 팝업 */
.plan-dialog {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(18, 14, 32, 0.98);
  color: rgba(255, 255, 255, 0.9);
  padding: 0;
  max-width: min(520px, calc(100vw - 32px));
}
.plan-dialog::backdrop {
  background: rgba(0, 0, 0, 0.55);
}
.plan-dialog-inner {
  padding: 16px 16px;
}
.plan-dialog-title {
  margin: 0 0 10px;
  font-weight: 900;
  font-size: 1.1rem;
}
.plan-dialog-body {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.6;
}
.plan-dialog-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  margin-top: 34px;
  padding: 28px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(0, 0, 0, 0.10);
}
.footer-inner {
  display: grid;
  gap: 18px;
}
.footer-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.footer-brand .footer-title {
  font-weight: 900;
  font-size: 1.05rem;
  margin: 0;
}
.footer-brand .footer-sub {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 700;
}
.footer-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.footer-link {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}
.footer-link:hover {
  text-decoration: underline;
}
.footer-sep {
  color: rgba(255, 255, 255, 0.35);
}
.footer-line {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  font-size: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.footer-line .footer-sep {
  margin: 0 2px;
}
.footer-muted {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.92rem;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
@media (max-width: 860px) {
  .footer-line {
    font-size: 0.94rem;
  }
}

.content-box,
.resources-box,
.files-box {
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.7;
}

.resources-box pre {
  margin: 12px 0;
  padding: 14px 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.22);
  overflow: auto;
}

.resources-box code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New",
    monospace;
  font-size: 0.98rem;
}

.file-item {
  display: grid;
  gap: 6px;
  padding: 12px 12px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
  margin-top: 12px;
}

.file-item a {
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 980px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .course-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .course-thumb {
    aspect-ratio: 16 / 9;
    height: auto;
  }
}

/* Auth pages */
.auth-section {
  padding: 44px 0 70px;
  /* 폼은 조금 더 크게/편하게 */
  font-size: 1.05rem;
}

.card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.auth-card {
  margin: 0 auto;
  max-width: 560px;
  padding: 28px 26px;
}

.auth-card-wide {
  max-width: 880px;
}

.card-head {
  padding: 6px 6px 12px;
}

.card-title {
  margin: 0 0 6px;
  font-size: 1.85rem;
  letter-spacing: -0.02em;
}

.card-sub {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.65;
  font-size: 1.05rem;
}

.inline-warning {
  display: none;
  margin: 10px 6px 0;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.25);
  color: rgba(255, 255, 255, 0.86);
}

.inline-warning.is-visible {
  display: block;
}

.form {
  padding: 10px 6px 6px;
}

.field {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.label {
  font-weight: 800;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: -0.01em;
  font-size: 1.05rem;
}

.hint {
  margin: 0;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.68);
}

.hint-spacer {
  visibility: hidden;
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 14px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.22);
  color: rgba(255, 255, 255, 0.92);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
  font-size: 1.05rem;
}

.input::placeholder,
.textarea::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: rgba(138, 92, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(138, 92, 255, 0.18);
  background: rgba(0, 0, 0, 0.26);
}

.textarea {
  resize: vertical;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.form-msg {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: rgba(0, 0, 0, 0.18);
  min-height: 1.2em;
}

.form-msg[data-tone="error"] {
  border-color: rgba(255, 90, 90, 0.45);
  background: rgba(255, 90, 90, 0.12);
}

.form-msg[data-tone="success"] {
  border-color: rgba(90, 255, 160, 0.35);
  background: rgba(90, 255, 160, 0.10);
}

.upload-progress {
  width: 100%;
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
}

.attach-list {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.attach-item {
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
}

.helper-line {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.fieldset {
  margin: 22px 0 0;
  padding: 22px 18px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.16);
}

.legend {
  padding: 8px 12px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.92);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: none;
  font-size: 1.05rem;
}

.subsection {
  margin-top: 18px;
}

.subsection-title {
  margin: 0;
  font-size: 1.22rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.92);
}

.subsection-desc {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 1rem;
  line-height: 1.5;
}

.subsection-divider {
  margin: 20px 0 12px;
  border: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.16),
    transparent
  );
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.checks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 10px;
}

.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.86);
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.12);
}

.check input {
  margin-top: 4px;
  accent-color: var(--accent2);
}

.check:has(input:checked) {
  border-color: rgba(138, 92, 255, 0.45);
  background: rgba(138, 92, 255, 0.12);
}

.chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.14);
  color: rgba(255, 255, 255, 0.86);
  cursor: pointer;
  user-select: none;
}

.chip input {
  margin: 0;
  accent-color: var(--accent1);
}

.chip:has(input:checked) {
  border-color: rgba(255, 79, 216, 0.55);
  background: rgba(255, 79, 216, 0.14);
}

@media (max-width: 840px) {
  .auth-section {
    font-size: 1.02rem;
  }

  .card-title {
    font-size: 1.65rem;
  }
}

/* Modal */
.modal {
  border: none;
  padding: 0;
  background: transparent;
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.55);
}

.modal-card {
  width: min(520px, calc(100vw - 36px));
  margin: 10vh auto;
  padding: 18px 16px 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(20, 12, 35, 0.72);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: rgba(255, 255, 255, 0.92);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.modal-title {
  margin: 0;
  font-weight: 900;
  font-size: 1.25rem;
}

.modal-sub {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

/* Admin mission thumbnail preview */
.mission-thumb-preview {
  margin-top: 10px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.18);
  aspect-ratio: 16 / 7;
}

.mission-thumb-preview img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

@media (max-width: 840px) {
  .auth-section {
    padding: 26px 0 54px;
  }

  .auth-card {
    padding: 18px 14px;
  }

  .grid2 {
    grid-template-columns: 1fr;
  }

  .checks {
    grid-template-columns: 1fr;
  }

  /* lesson nav: mobile chips on, outline off */
  .course-layout {
    grid-template-columns: 1fr;
  }

  .lesson-nav-mobile {
    display: flex;
  }

  .lesson-outline {
    display: none;
  }
}

.hero {
  padding: 70px 0 84px;
}

/* Reduce gap between hero CTA and first home section */
.hero + .home-section {
  padding-top: 28px;
}

.home-section {
  padding: 44px 0 70px;
}

.schedule-card {
  padding: 18px;
  border-radius: 22px;
}

.schedule-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.schedule-month {
  display: flex;
  align-items: center;
  gap: 10px;
}

.schedule-month-title {
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  min-width: 160px;
  text-align: center;
}

.schedule-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.74);
  font-weight: 800;
  font-size: 0.98rem;
}

.schedule-filters {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 6px 0 14px;
}

.schedule-filter {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  padding: 9px 12px;
  font-weight: 900;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease, background 120ms ease, border-color 120ms ease;
}

.schedule-filter:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.schedule-filter.is-active {
  border-color: rgba(138, 92, 255, 0.45);
  background: rgba(138, 92, 255, 0.12);
}

.schedule-filter .dot {
  width: 9px;
  height: 9px;
}

.schedule-filter-hint {
  flex: 1 1 220px;
  font-size: 0.95rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  background: rgba(255, 255, 255, 0.5);
}

.dot-live {
  background: rgba(138, 92, 255, 0.95);
}

.dot-special {
  background: rgba(255, 79, 216, 0.95);
}

.dot-deadline {
  background: rgba(255, 186, 73, 0.95);
}

.calendar {
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.calendar-dow {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0;
  padding: 10px 10px 10px;
  background: rgba(0, 0, 0, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-weight: 900;
  color: rgba(255, 255, 255, 0.78);
}

.calendar-dow > div {
  text-align: center;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}

.cal-cell {
  min-height: 110px;
  padding: 10px 10px 8px;
  border-right: 1px solid rgba(255, 255, 255, 0.10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.02);
}

.cal-cell:nth-child(7n) {
  border-right: none;
}

.cal-cell.is-muted {
  opacity: 0.45;
}

.cal-cell.is-today {
  background: rgba(255, 79, 216, 0.06);
  box-shadow: inset 0 0 0 2px rgba(255, 79, 216, 0.18);
}

.cal-date {
  font-weight: 900;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 6px;
}

.cal-items {
  display: grid;
  gap: 6px;
}

.cal-chip {
  display: grid;
  grid-template-columns: 10px 1fr;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.18);
}

.cal-chip-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
}

.cal-chip.dot-live .cal-chip-dot {
  background: rgba(138, 92, 255, 0.95);
}
.cal-chip.dot-special .cal-chip-dot {
  background: rgba(255, 79, 216, 0.95);
}
.cal-chip.dot-deadline .cal-chip-dot {
  background: rgba(255, 186, 73, 0.95);
}

.cal-chip-text {
  font-weight: 800;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.88);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-more {
  font-size: 0.92rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.7);
  padding-left: 2px;
}

.upcoming {
  margin-top: 14px;
}

.upcoming-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0 10px;
}

.upcoming-list {
  display: grid;
  gap: 10px;
}

.up-item {
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  padding: 12px 12px;
}

.up-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.05rem;
}

.up-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  background: rgba(255, 255, 255, 0.6);
}

.up-sub {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.98rem;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.roadmap-card {
  padding: 16px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
}

.roadmap-head {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
}

.roadmap-title {
  margin: 0;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

.roadmap-row {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.7;
}

.roadmap-row b {
  display: inline-block;
  min-width: 56px;
  color: rgba(255, 255, 255, 0.92);
}

.roadmap-homework {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.18);
  font-weight: 800;
  line-height: 1.65;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.board {
  padding: 16px;
  border-radius: 22px;
}

.board-head {
  margin-bottom: 10px;
}

.board-list {
  display: grid;
  gap: 10px;
}

.board-item {
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  padding: 12px 12px;
}

.board-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.board-title {
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.board-body {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.65;
  font-size: 0.98rem;
  white-space: pre-wrap;
}

.board-meta {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  font-weight: 800;
}

.board-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
}

.board-link:hover {
  border-bottom-color: rgba(255, 79, 216, 0.7);
}

.mini {
  color: rgba(255, 255, 255, 0.78);
}

.empty-mini {
  padding: 12px 0;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 800;
}

@media (max-width: 920px) {
  .board-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-grid {
    grid-template-columns: 1fr;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 34px;
}

.hero-title {
  margin: 0 0 18px;
  font-size: clamp(2.6rem, 5.2vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}

.hero-desc {
  margin: 0 0 28px;
  font-size: clamp(1.15rem, 1.3vw, 1.35rem);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero .hero-actions .btn {
  font-size: clamp(1.05rem, 1.2vw, 1.15rem);
  padding: 16px 26px;
}

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  transition:
    transform 140ms ease,
    box-shadow 140ms ease,
    filter 140ms ease,
    background 140ms ease;
  user-select: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  color: rgba(255, 255, 255, 0.96);
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  box-shadow:
    0 12px 30px rgba(255, 79, 216, 0.18),
    0 18px 60px rgba(138, 92, 255, 0.22);
}

.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn-ghost {
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.085);
  transform: translateY(-1px);
}

.btn-danger {
  color: rgba(255, 255, 255, 0.96);
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  box-shadow:
    0 10px 24px rgba(239, 68, 68, 0.18),
    0 16px 50px rgba(185, 28, 28, 0.20);
}

.btn-danger:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.hero-visual {
  position: relative;
  min-height: 360px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: -20px -12px -20px -12px;
  background:
    radial-gradient(220px 180px at 68% 40%, rgba(255, 79, 216, 0.18), transparent 60%),
    radial-gradient(260px 200px at 40% 66%, rgba(88, 212, 255, 0.16), transparent 65%),
    radial-gradient(260px 220px at 72% 72%, rgba(138, 92, 255, 0.18), transparent 68%);
  filter: blur(10px);
  opacity: 0.9;
}

.hero-visual-card {
  position: relative;
  height: 100%;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(500px 260px at 24% 22%, rgba(255, 79, 216, 0.18), transparent 60%),
    radial-gradient(420px 260px at 76% 72%, rgba(138, 92, 255, 0.16), transparent 62%),
    rgba(255, 255, 255, 0.05);
  box-shadow:
    0 30px 90px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  padding: 22px 22px 20px;
  overflow: hidden;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero-visual-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.16);
}

.hero-visual-kicker {
  font-weight: 900;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.05rem;
}

.hero-visual-title {
  margin-top: 10px;
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: 1.45rem;
  line-height: 1.25;
  color: rgba(255, 255, 255, 0.92);
}

.hero-visual-mock {
  margin-top: 16px;
  padding: 14px 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.18);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.hero-visual-chip {
  flex: 0 0 auto;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 900;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.86);
}

.hero-visual-bars {
  flex: 1 1 100%;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.hero-visual-bars span {
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.10);
}

.hero-image {
  position: relative;
  width: 100%;
  max-width: 520px;
  display: block;
  margin-left: auto;
  border-radius: 24px;
  box-shadow:
    0 30px 90px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

/* Toast */
.toast-stack {
  position: fixed;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 10px;
  z-index: 100;
}

.toast {
  width: min(360px, calc(100vw - 36px));
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(10, 10, 20, 0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  color: rgba(255, 255, 255, 0.92);
  transform: translateY(8px);
  opacity: 0;
  animation: toast-in 160ms ease forwards;
}

.toast-title {
  font-size: 1rem;
  font-weight: 800;
  margin: 0 0 4px;
}

.toast-body {
  margin: 0;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.4;
}

@keyframes toast-in {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes toast-out {
  to {
    transform: translateY(6px);
    opacity: 0;
  }
}

/* Community */
.community-section {
  padding: 44px 0 70px;
}

.mission-card {
  padding: 22px;
  margin-bottom: 16px;
}

.mission-thumb {
  width: 100%;
  aspect-ratio: 16 / 7;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  margin-bottom: 14px;
  position: relative;
}

.mission-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.mission-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.35));
}

.mission-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.mission-kicker {
  margin: 0 0 8px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.75);
}

.mission-title {
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
}

.mission-desc {
  margin: 10px 0 12px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.08rem;
}

.mission-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mission-details summary {
  cursor: pointer;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.9);
}

.mission-example {
  margin: 12px 0 0;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.24);
  overflow: auto;
}

.mission-example code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0 10px;
}

.tab {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 900;
  font-size: 1.05rem;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.tab:hover {
  background: rgba(255, 255, 255, 0.085);
  transform: translateY(-1px);
}

.tab.is-active {
  border-color: rgba(255, 79, 216, 0.6);
  background: rgba(255, 79, 216, 0.12);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 14px 0 10px;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-row {
  display: flex;
  gap: 12px;
  margin: 10px 0 14px;
}

.post-list {
  display: grid;
  gap: 12px;
}

.post-card {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 18px;
  padding: 16px 16px 14px;
}

/* Realtime board */
.rb-board-card {
  padding: 18px;
}

.rb-board-card .panel-head {
  margin-top: 0;
}

.post-head {
  margin-bottom: 10px;
}

.post-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.post-title {
  margin: 0;
  font-size: 1.22rem;
  letter-spacing: -0.02em;
}

.post-meta {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.98rem;
}

.post-body {
  margin: 10px 0 0;
  line-height: 1.75;
  font-size: 1.06rem;
  color: rgba(255, 255, 255, 0.86);
  white-space: pre-wrap;
}

.answer-box {
  margin-top: 12px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.18);
}

.answer-head {
  font-weight: 900;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.answer-body {
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.7;
  white-space: pre-wrap;
}

.post-actions {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.post-actions-left,
.post-actions-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.reaction-row {
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.reaction-btn {
  border-color: rgba(255, 255, 255, 0.20);
  padding: 10px 12px;
  gap: 10px;
}

.reaction-emoji {
  font-size: 1.15rem;
  line-height: 1;
}

.reaction-count {
  display: inline-block;
  min-width: 3ch;
  text-align: center;
  font-weight: 900;
}

.post-image {
  margin-top: 12px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.post-image img {
  width: 100%;
  height: auto;
  display: block;
}

.tag-row {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.95rem;
  font-weight: 800;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.86);
}

.empty-card {
  padding: 18px;
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.7;
  font-weight: 700;
}

/* Wider modal variant (community 글쓰기) */
.modal-card.modal-wide {
  width: min(720px, calc(100vw - 24px));
}

/* Responsive */
@media (max-width: 920px) {
  .nav {
    gap: 18px;
  }
}

@media (max-width: 840px) {
  /* Fix: ensure drawer sits above backdrop (mobile only) */
  .site-header {
    z-index: 300;
  }

  .header-inner {
    height: auto;
    padding: 14px 0;
    flex-wrap: nowrap;
    justify-content: space-between;
  }

  .brand {
    min-width: unset;
  }

  /* Mobile-only: header nav drawer (desktop untouched) */
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(360px, 88vw);
    padding: 18px 16px 18px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    overflow-y: auto;
    overflow-x: hidden;
    background: rgba(5, 10, 29, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    transform: translateX(110%);
    transition: transform 200ms ease;
    z-index: 310;
  }

  html.nav-open .nav {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 1.02rem; /* down from 1.2rem for mobile */
    padding: 12px 10px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-auth {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin: 10px 0 0;
  }

  .nav-user {
    font-size: 1.02rem;
    white-space: nowrap;
    padding: 2px 4px;
    opacity: 0.9;
  }

  .nav-logout {
    font-size: 1.02rem;
    padding: 8px 12px;
  }

  .nav-toggle {
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.92);
    border-radius: 14px;
    height: 44px;
    width: 44px;
    display: inline-grid;
    place-items: center;
    cursor: pointer;
    flex: 0 0 auto;
  }

  .nav-toggle-lines {
    width: 18px;
    height: 14px;
    display: grid;
    gap: 4px;
  }

  .nav-toggle-lines span {
    height: 2px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.9);
    display: block;
  }

  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms ease;
    z-index: 290;
  }

  html.nav-open .nav-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  html.nav-open body {
    overflow: hidden;
  }

  .brand-avatar {
    width: 52px;
    height: 52px;
  }

  .brand-title {
    font-size: 1.12rem;
  }

  .brand-sub {
    font-size: 1.02rem;
  }

  .hero {
    padding: 48px 0 70px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .hero-visual {
    order: -1;
    min-height: unset;
  }

  .hero-image {
    margin: 0 auto;
    max-width: 560px;
  }

  .hero-actions {
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}