@import url("tokens.css");

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-text);
  background: var(--color-bg);
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-text-on-accent);
}

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

.container {
  width: min(100% - 2.5rem, var(--content-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-section);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-fast);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border-subtle);
}

.logo {
  font-weight: 500;
  letter-spacing: -0.02em;
}

.nav {
  display: none;
  gap: 1.5rem;
  margin-left: auto;
  font-size: 0.9375rem;
}

.nav a {
  color: var(--color-text-muted);
}

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

.nav__external {
  color: var(--color-accent);
}

.nav__external:hover {
  color: var(--color-accent-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: background var(--duration-fast), border-color var(--duration-fast);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
}

.btn--ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary {
  background: var(--color-accent-muted);
  color: var(--color-text);
  border: 1px solid var(--color-accent);
}

.btn--secondary:hover {
  background: rgba(232, 169, 48, 0.22);
}

.header-cta {
  margin-left: 0;
}

.header-edit {
  margin-left: auto;
}

@media (min-width: 48rem) {
  .header-edit {
    margin-left: auto;
  }

  .header-cta {
    margin-left: 0;
  }
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-left: auto;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
}

@media (min-width: 48rem) {
  .nav-toggle {
    display: none;
  }

  .nav {
    display: flex;
  }

  .header-cta {
    margin-left: 0;
  }
}

@media (max-width: 47.99rem) {
  .nav.is-open {
    display: flex;
    flex-direction: column;
    width: 100%;
    order: 3;
    padding: 0.5rem 0 0.25rem;
    border-top: 1px solid var(--color-border-subtle);
  }

  .nav.is-open a {
    padding: 0.5rem 0;
  }
}

.hero {
  padding-block: clamp(2.5rem, 6vw, 4rem) var(--space-section);
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero__title {
  margin: 0 0 1rem;
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
}

.text-accent {
  font-style: normal;
  color: var(--color-accent);
}

.hero__lead {
  margin: 0;
  max-width: 52ch;
  color: var(--color-text-muted);
}

.section-label {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-intro {
  margin: 0 0 2rem;
  max-width: 60ch;
  color: var(--color-text-muted);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.filter-btn {
  padding: 0.4rem 0.9rem;
  font-size: 0.8125rem;
  font-family: inherit;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--duration-fast), border-color var(--duration-fast),
    background var(--duration-fast);
}

.filter-btn:hover,
.filter-btn.is-active {
  color: var(--color-text);
  border-color: var(--color-accent);
  background: var(--color-accent-muted);
}

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

/* 주요 데모 — 카드 1장만, 하단 그리드와 동일 컴포넌트 */
.ai-grid--solo {
  grid-template-columns: minmax(0, 22rem);
}

@media (min-width: 40rem) {
  .ai-grid--solo {
    grid-template-columns: minmax(0, 24rem);
  }
}

@media (min-width: 40rem) {
  .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 64rem) {
  .ai-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.ai-card {
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.35rem;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

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

.ai-card__badge--idea {
  color: var(--cat-ideas);
  background: rgba(251, 191, 36, 0.12);
}

.ai-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.ai-card__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 500;
}

.ai-card__badge {
  flex-shrink: 0;
  padding: 0.2rem 0.55rem;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
}

.ai-card__badge--learning {
  color: var(--color-accent);
  background: var(--color-accent-muted);
}

.ai-card__badge--demo {
  color: #8fd4a8;
  background: rgba(143, 212, 168, 0.12);
}

.ai-card__badge--planned {
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.06);
}

.ai-card__badge--local {
  color: #9ab4e8;
  background: rgba(154, 180, 232, 0.12);
}

.section-intro code {
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--color-accent-muted);
  color: var(--color-accent);
}

.ai-card__summary {
  margin: 0 0 1rem;
  flex: 1;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.ai-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.ai-card__tag {
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
}

.ai-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.875rem;
}

.ai-card__links a {
  color: var(--color-accent);
}

.ai-card__links a:hover {
  text-decoration: underline;
}

.vibe-guide {
  border-top: 1px solid var(--color-border-subtle);
}

.vibe-guide__grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 48rem) {
  .vibe-guide__grid {
    grid-template-columns: repeat(2, 1fr);
    align-items: start;
  }
}

.vibe-guide__figure {
  margin: 0;
}

.vibe-guide__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-elevated);
}

.vibe-guide__figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.vibe-guide__note {
  margin: 1.5rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.vibe-guide__note a {
  color: var(--color-accent);
}

.resource-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.resource-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.resource-list a {
  color: var(--color-accent);
}

.resource-list a:hover {
  text-decoration: underline;
}

.site-footer {
  padding-block: 2rem 2.5rem;
  border-top: 1px solid var(--color-border-subtle);
}

.footer__copy {
  margin: 0;
  font-size: 0.9375rem;
}

.footer__meta {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__meta a {
  color: var(--color-accent);
}

.updated-note {
  margin: 2rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.ai-grid-empty {
  padding: 2rem;
  text-align: center;
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  grid-column: 1 / -1;
}