/* ================= stage (desktop presentation) ================= */

.stage {
  position: relative;
  z-index: var(--z-content);
  display: flex;
  flex-direction: column;
  width: min(100% - (var(--stage-pad) * 2), 1440px);
  height: 100dvh;
  max-height: 100dvh;
  margin-inline: auto;
  padding: var(--stage-pad) 0;
  overflow: hidden;
}

body.is-stage {
  overflow: hidden;
  height: 100dvh;
}

/* ================= hero (compact bar) ================= */

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  flex: none;
  padding: 0.15rem 0.15rem 0.85rem;
  min-height: 0;
}

.hero__brand {
  min-width: 0;
}

.hero__title {
  font-size: var(--t-display);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(120deg, var(--fg) 20%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.7rem;
  margin-top: 0.4rem;
  font-size: var(--t-sm);
  color: var(--fg-muted);
}

.hero__name {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg-dim);
}

.hero__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--fg-dim);
  opacity: 0.55;
}

.hero__tagline {
  color: var(--fg-muted);
}

.hero__socials {
  display: flex;
  gap: var(--s-3);
  font-size: 1.15rem;
  color: var(--fg-dim);
  flex: none;
}

.hero__socials a {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-pill);
  background: var(--glass-bottom);
  transition: color var(--d-base) var(--ease-inout),
    border-color var(--d-base) var(--ease-inout),
    background var(--d-base) var(--ease-inout);
}

.hero__socials a:hover,
.hero__socials a:focus-visible {
  color: var(--accent-soft);
  border-color: var(--glass-border-hi);
  background: var(--glass-top);
}

/* ================= bento grid ================= */

.bento {
  position: relative;
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  grid-template-areas:
    "skills blog"
    "projects contact";
  gap: var(--gap);
}

.card--skills {
  grid-area: skills;
}

.card--blog {
  grid-area: blog;
}

.card--projects {
  grid-area: projects;
}

.card--contact {
  grid-area: contact;
}

/* 선택 시: 메인 영역 + 얇은 사이드 레일 */
.bento[data-focus] {
  grid-template-columns: 1fr var(--rail-size);
  grid-template-rows: 1fr 1fr 1fr;
}

.bento[data-focus="skills"] {
  grid-template-areas:
    "skills blog"
    "skills projects"
    "skills contact";
}

.bento[data-focus="blog"] {
  grid-template-areas:
    "blog skills"
    "blog projects"
    "blog contact";
}

.bento[data-focus="projects"] {
  grid-template-areas:
    "projects skills"
    "projects blog"
    "projects contact";
}

.bento[data-focus="contact"] {
  grid-template-areas:
    "contact skills"
    "contact blog"
    "contact projects";
}

/* ================= card shell ================= */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  padding: var(--s-5);
  overflow: hidden;
  background: linear-gradient(145deg, var(--glass-top), var(--glass-bottom));
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card), var(--shadow-inset);
  cursor: pointer;
  transition: border-color var(--d-base) var(--ease-out),
    box-shadow var(--d-base) var(--ease-out),
    opacity var(--d-base) var(--ease-out);
}

@supports (backdrop-filter: blur(1px)) {
  .card {
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  }
}

@supports not (backdrop-filter: blur(1px)) {
  .card {
    background: var(--glass-fallback);
  }
}

.card__glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  /* 반투명 글래스 + backdrop-filter 위에 흰면 합성이 밝게 터지므로
     중심 알파를 낮게 잡고 보라 틴트는 약하게만 얹는다. */
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 0%),
    rgb(255 255 255 / 0.4) 0%,
    rgb(196 181 253 / 0.16) 34%,
    transparent 68%
  );
  transition: opacity var(--d-base) var(--ease-out);
}

.card:hover {
  border-color: var(--glass-border-hi);
  box-shadow: var(--shadow-lift), var(--shadow-inset);
}

.card:hover .card__glow {
  opacity: 0.85;
}

.card__head {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-4);
  flex: none;
}

.card__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-size: 1rem;
  color: var(--accent-soft);
  background: rgb(109 94 247 / 0.1);
  border: 1px solid rgb(109 94 247 / 0.22);
  border-radius: var(--r-sm);
  flex: none;
}

.card__title {
  flex: 1;
  min-width: 0;
  font-size: var(--t-h2);
}

.card__toggle {
  display: inline-flex;
  align-items: center;
}

.card__hint {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--fg-dim);
  transition: color var(--d-base) var(--ease-inout);
}

.card:hover .card__hint {
  color: var(--accent-soft);
}

.card__close {
  display: none;
  place-items: center;
  width: 32px;
  height: 32px;
  font-size: 0.95rem;
  color: var(--fg-muted);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-pill);
  background: rgb(255 255 255 / 0.35);
  transition: color var(--d-base) var(--ease-inout),
    border-color var(--d-base) var(--ease-inout);
}

.card__close:hover,
.card__close:focus-visible {
  color: var(--fg);
  border-color: var(--glass-border-hi);
}

.card__preview {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.card__detail {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) transparent;
}

/* 미리보기 모드에서는 detail이 절대 레이아웃에 끼어들지 않는다.
   (둘 다 flex:1 이라 같이 보이면 카드가 반으로 갈라진다) */
.card:not(.is-expanded) .card__detail {
  display: none !important;
}

.card.is-expanded .card__preview,
.card.is-expanded .card__toggle {
  display: none !important;
}

.card__detail::-webkit-scrollbar {
  width: var(--scroll-size);
  height: var(--scroll-size);
}

.card__detail::-webkit-scrollbar-track {
  background: transparent;
}

.card__detail::-webkit-scrollbar-thumb {
  background-color: var(--scroll-thumb);
  background-clip: padding-box;
  border: 2px solid transparent;
  border-radius: var(--r-pill);
}

.card__detail::-webkit-scrollbar-thumb:hover {
  background-color: var(--scroll-thumb-hover);
}

.card__detail::-webkit-scrollbar-corner {
  background: transparent;
}

.card__detail[hidden] {
  display: none !important;
}

/* 전환 중: preview는 페이드용으로만 잠시 보이게 둔다.
   detail은 플렉스 흐름에 넣지 않고, 떠나는 것만 absolute로 페이드한다. */
.bento.is-transitioning .card.is-expanded .card__preview,
.bento.is-transitioning .card.is-dimmed .card__preview {
  display: block !important;
}

.bento.is-transitioning .card__detail.is-fading-out {
  display: block !important;
  position: absolute;
  inset: 4.25rem var(--s-5) var(--s-5);
  z-index: 2;
  pointer-events: none;
}

.card__detail:focus,
.card__detail:focus-visible {
  outline: none;
}

/* ================= expanded / rail ================= */

.card.is-expanded {
  padding: var(--s-5) var(--s-6);
  cursor: default;
  border-color: var(--glass-border-hi);
  box-shadow: var(--shadow-lift), var(--shadow-inset);
}

.card.is-expanded .card__close {
  display: grid;
}

.card.is-expanded .card__glow {
  opacity: 0;
}

/* 레일: 아이콘+제목만 남기고 축소 */
.card.is-dimmed {
  padding: var(--s-3);
  opacity: 0.88;
}

.card.is-dimmed .card__preview,
.card.is-dimmed .card__detail,
.card.is-dimmed .card__toggle,
.card.is-dimmed .card__close,
.card.is-dimmed .card__glow {
  display: none !important;
}

.card.is-dimmed .card__head {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--s-3);
  height: 100%;
  margin: 0;
  text-align: center;
}

.card.is-dimmed .card__title {
  flex: none;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: var(--t-sm);
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.card.is-dimmed:hover {
  opacity: 1;
  border-color: var(--glass-border-hi);
}

/* ================= footer ================= */

.footer {
  flex: none;
  padding: 0.55rem 0 0;
  text-align: center;
}

.footer__line {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  color: var(--fg-dim);
  letter-spacing: -0.01em;
}

/* ================= tablet / mobile: 스크롤 허용 ================= */

@media (max-width: 900px) {
  body.is-stage {
    overflow: auto;
    height: auto;
  }

  .stage {
    width: min(100% - 1.75rem, 1440px);
    height: auto;
    max-height: none;
    overflow: visible;
    padding: 1rem 0 1.5rem;
  }

  .hero {
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 1rem;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 2.75rem);
  }

  .bento,
  .bento[data-focus],
  .bento[data-focus="skills"],
  .bento[data-focus="blog"],
  .bento[data-focus="projects"],
  .bento[data-focus="contact"] {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
    grid-template-columns: none;
    grid-template-rows: none;
    grid-template-areas: none;
  }

  .card,
  .card.is-expanded,
  .card.is-dimmed {
    min-height: 220px;
    padding: var(--s-4);
    opacity: 1;
  }

  .card.is-dimmed {
    display: none;
  }

  .card.is-dimmed .card__preview,
  .card.is-dimmed .card__toggle {
    display: none !important;
  }

  .card.is-expanded {
    min-height: min(70vh, 640px);
  }

  .card.is-dimmed .card__head {
    flex-direction: row;
    height: auto;
    text-align: left;
  }

  .card.is-dimmed .card__title {
    writing-mode: horizontal-tb;
  }
}