:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --panel: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.12);
  --danger: #d93025;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "SF Pro Text", "SF Pro Display", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 48px;
  background: rgba(245, 245, 247, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.logo {
  font-size: 20px;
  font-weight: 600;
}

.nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--panel);
  display: grid;
  place-items: center;
}

main {
  display: grid;
  gap: 96px;
  padding: 64px 48px 120px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.hero {
  text-align: center;
  display: grid;
  gap: 20px;
  justify-items: center;
}

.hero h1 {
  font-family: "SF Pro Display", "SF Pro Text", sans-serif;
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 600;
}

.subhead {
  color: var(--muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn {
  border-radius: 999px;
  padding: 12px 22px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-weight: 600;
  cursor: pointer;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 10px 30px rgba(0, 113, 227, 0.3);
}

.btn--ghost {
  background: transparent;
}

.btn--danger {
  border-color: rgba(217, 48, 37, 0.4);
  color: var(--danger);
  background: #fff;
}

.hero-media {
  width: min(820px, 100%);
  padding: 36px;
  background: var(--panel);
  border-radius: 24px;
  border: 1px solid var(--line);
}

.category-bar {
  display: flex;
  justify-content: center;
}

.category-track {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  background: var(--panel);
  border-radius: 999px;
  border: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}

.category-track::-webkit-scrollbar {
  display: none;
}

.category {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  white-space: nowrap;
  cursor: pointer;
}

.category.active {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent);
  font-weight: 600;
}

.hero-device {
  height: 320px;
  border-radius: 22px;
  background: linear-gradient(135deg, #e9eef7, #fff 60%);
  border: 1px solid var(--line);
}

.promo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.promo-card {
  background: var(--panel);
  border-radius: 22px;
  border: 1px solid var(--line);
  padding: 28px;
  display: grid;
  gap: 14px;
  min-height: 220px;
}

.link-btn {
  border: none;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 8px 14px;
  border-radius: 999px;
  width: fit-content;
  cursor: pointer;
}

.band {
  background: var(--panel);
  border-radius: 24px;
  border: 1px solid var(--line);
  padding: 32px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.feature {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: center;
}

.feature-media {
  height: 360px;
  border-radius: 26px;
  background: linear-gradient(120deg, #e7e7e9, #fff 60%);
  border: 1px solid var(--line);
}

.feature-content h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 14px;
}

.feature-content p {
  color: var(--muted);
}

.feature-stats {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-stats div {
  background: var(--panel);
  border-radius: 16px;
  border: 1px solid var(--line);
  padding: 16px;
  display: grid;
  gap: 6px;
}

.feature-stats strong {
  font-size: 1.4rem;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tile {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
}

.board {
  display: grid;
  gap: 24px;
}

.board-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}

.board-sub {
  color: var(--muted);
}

.board-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 24px;
}

.post-form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  display: grid;
  gap: 14px;
  box-shadow: var(--shadow);
}

.post-form label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
}

.post-form input,
.post-form textarea {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: inherit;
}

.form-note {
  color: var(--muted);
  font-size: 0.85rem;
}

.post-list {
  display: grid;
  gap: 16px;
}

.post-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  display: grid;
  gap: 10px;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.post-actions {
  display: flex;
  gap: 8px;
}

.empty-state {
  background: var(--panel);
  border: 1px dashed var(--line);
  border-radius: 18px;
  padding: 18px;
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  z-index: 20;
}

.modal.show {
  display: grid;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.modal-card {
  position: relative;
  background: var(--panel);
  border-radius: 20px;
  padding: 24px;
  width: min(420px, 90vw);
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
}

.auth-tabs {
  display: flex;
  gap: 8px;
}

.tab {
  flex: 1;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  color: var(--muted);
}

.tab.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.auth-panel {
  display: none;
  gap: 12px;
}

.auth-panel.active {
  display: grid;
}

.auth-panel label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
}

.auth-panel input {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: inherit;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px;
  color: var(--muted);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 24px;
}

.footer-columns h4 {
  color: var(--ink);
  margin-bottom: 12px;
}

.footer-note {
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .promo-grid,
  .tiles {
    grid-template-columns: 1fr;
  }

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

  .board-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 12px 20px;
  }

  .nav {
    position: absolute;
    top: 54px;
    right: 20px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 12px 16px;
    flex-direction: column;
    gap: 12px;
    display: none;
  }

  .nav.open {
    display: flex;
  }

  .menu-btn {
    display: inline-flex;
  }

  main {
    padding: 48px 20px 96px;
  }

  .band {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-stats {
    grid-template-columns: 1fr;
  }

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}