/* ==========================================================================
   🏛️ STYLE.CSS — 미니멀 에디토리얼 갤러리 스타일시트
   프로젝트: 최인우 | 디자인공학과 포트폴리오
   ========================================================================== */

@import url("design-tokens.css");

/* ─── 1. 기본 레이아웃 컨테이너 ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: 820px;
}

.section {
  padding: var(--space-24) 0;
  position: relative;
}

/* 섹션 타이틀 & 에디토리얼 라벨 */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
}

.section-title {
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-body);
  max-width: 580px;
}

/* ─── 2. 초정밀 커스텀 커서 (피드백 2 대응) ────────────────────────────── */
.has-custom-cursor {
  cursor: default; /* 시스템 커서 fallback 유지 */
}

.has-custom-cursor a,
.has-custom-cursor button,
.has-custom-cursor .work-card,
.has-custom-cursor [role="button"] {
  cursor: pointer;
}

/* 중심 점 (Dot) - 핫스팟 0px 오차 */
.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #FFFFFF;
  pointer-events: none;
  z-index: 10000;
  opacity: 0;
  transform: translate(-50%, -50%);
  margin-left: -3px;
  margin-top: -3px;
  transition: opacity 0.2s ease, transform 0.15s ease, background-color 0.2s ease;
  will-change: transform;
}

.cursor-dot.is-clicking {
  transform: scale(0.6);
  background-color: var(--color-accent);
}

/* 외곽 링 (Ring) - 고속 LERP 팔로워 */
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  background: transparent;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  margin-left: -16px;
  margin-top: -16px;
  transform: translate(-50%, -50%);
  transition: width 0.22s var(--ease-out),
              height 0.22s var(--ease-out),
              border-color 0.22s var(--ease-out),
              background-color 0.22s var(--ease-out),
              opacity 0.2s ease;
  will-change: transform;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cursor-ring.is-hovered {
  width: 56px;
  height: 56px;
  margin-left: -28px;
  margin-top: -28px;
  border-color: var(--color-accent);
  background-color: rgba(59, 130, 246, 0.08);
}

.cursor-ring.is-clicking {
  transform: scale(0.85);
  border-color: #FFFFFF;
}

.cursor-ring[data-label]::after {
  content: attr(data-label);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #FFFFFF;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.cursor-ring.is-hovered[data-label]::after {
  opacity: 1;
}

.no-custom-cursor .cursor-dot,
.no-custom-cursor .cursor-ring {
  display: none !important;
}

/* ─── 3. 글로벌 네비게이션 헤더 & 사운드 토글 UI ───────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--header-border);
  transition: background var(--duration-normal), border-color var(--duration-normal);
}

.site-header.is-scrolled {
  background: rgba(10, 11, 14, 0.94);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
}

.brand-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* 헤더 우측 액션 (사운드 토글 + 메뉴) */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

/* 사운드 토글 버튼 */
.sound-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  transition: all var(--duration-fast);
}

.sound-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.sound-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.sound-bars span {
  display: block;
  width: 2px;
  height: 4px;
  background-color: var(--color-text-muted);
  border-radius: 1px;
  transition: background-color var(--duration-fast);
}

/* BGM 재생 중일 때 파형 애니메이션 */
.sound-toggle-btn.is-playing .sound-bars span {
  background-color: var(--color-accent);
  animation: sound-eq 1.2s ease-in-out infinite alternate;
}

.sound-toggle-btn.is-playing .sound-bars span:nth-child(1) { height: 10px; animation-delay: 0s; }
.sound-toggle-btn.is-playing .sound-bars span:nth-child(2) { height: 6px;  animation-delay: 0.2s; }
.sound-toggle-btn.is-playing .sound-bars span:nth-child(3) { height: 12px; animation-delay: 0.4s; }
.sound-toggle-btn.is-playing .sound-bars span:nth-child(4) { height: 8px;  animation-delay: 0.1s; }

@keyframes sound-eq {
  0% { transform: scaleY(0.3); }
  100% { transform: scaleY(1); }
}

.sound-toggle-btn.is-muted .sound-text {
  color: var(--color-text-muted);
}

.sound-toggle-btn.is-playing .sound-text {
  color: var(--color-text-primary);
}

/* 데스크톱 네비게이션 */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
  padding: 4px 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-accent);
}

/* 모바일 햄버거 */
.nav-toggle-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
}

.nav-toggle-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text-primary);
  transition: all var(--duration-normal);
}

.nav-toggle-btn.is-active span:nth-child(1) { transform: rotate(45deg) translate(4px, 5px); }
.nav-toggle-btn.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle-btn.is-active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -5px); }

.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6);
  transform: translateY(-110%);
  transition: transform var(--duration-normal) var(--ease-out);
  z-index: 990;
}

.mobile-menu.is-open {
  transform: translateY(0);
}

.mobile-menu a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  border-bottom: 1px solid var(--color-border);
}

/* ─── 4. 히어로 섹션 (미니멀 에디토리얼) ─────────────────────────────────── */
.hero-section {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg-base);
  overflow: hidden;
  padding-top: 72px;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

.hero-spotlight {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--space-16) 0 var(--space-20);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: var(--font-weight-bold);
  line-height: 1.08;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
  max-width: 900px;
}

.hero-title .hero-accent {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-regular);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-heading);
  max-width: 580px;
  margin-bottom: var(--space-10);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* 버튼 컴포넌트 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-normal);
  transition: all var(--duration-fast);
}

.btn-primary {
  background-color: #FFFFFF;
  color: #0A0B0E;
}

.btn-primary:hover {
  background-color: #E2E8F0;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.06);
  border-color: var(--color-border-hover);
}

.btn-magnetic-wrapper {
  display: inline-block;
}

.btn-magnetic {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  background-color: #FFFFFF;
  color: #0A0B0E;
  transition: background-color var(--duration-fast), transform 0.1s var(--ease-out);
}

.btn-magnetic:hover {
  background-color: #E2E8F0;
}

/* ─── 5. 작업 과정 타임라인 (에디토리얼 4열) ─────────────────────────────── */
.timeline-section {
  padding: var(--space-20) 0;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.timeline-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast);
}

.timeline-item:hover {
  border-color: var(--color-border-hover);
}

.timeline-node {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.timeline-label {
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.timeline-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-body);
}

/* ─── 6. 작품 그리드 & 카드 (갤러리 도록 풍) ────────────────────────────── */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.work-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--duration-fast), transform var(--duration-normal) var(--ease-out);
  position: relative;
}

.work-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.work-card-link {
  display: block;
}

.work-card-media {
  position: relative;
  aspect-ratio: 16 / 11;
  background-color: #000000;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.work-card-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background-color: #0B0D12;
  transition: transform var(--duration-slow) var(--ease-out);
}

.work-card:hover .work-card-img {
  transform: scale(1.03);
}

.work-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 11, 14, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.work-card:hover .work-card-overlay {
  opacity: 1;
}

.work-card-overlay-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: #FFFFFF;
  background: rgba(0, 0, 0, 0.75);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* 타이포 대체 카드 */
.work-card-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-elevated);
}

.fallback-inner {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  width: 100%;
  height: 100%;
  justify-content: space-between;
}

.fallback-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.fallback-badge-pill {
  font-size: var(--text-xs);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  align-self: flex-start;
  font-family: var(--font-mono);
}

.fallback-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
}

.fallback-rule {
  width: 32px;
  height: 2px;
  background-color: var(--accent, var(--color-accent));
}

/* 카드 바디 */
.work-card-body {
  padding: var(--space-5);
}

.work-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.work-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
}

.work-period {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}

.work-card-title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-heading);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.work-card-summary {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  line-height: var(--leading-body);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.work-card-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.work-tool-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-muted);
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
}

/* ─── 7. 카테고리 필터 탭 ─────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.filter-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  transition: all var(--duration-fast);
}

.filter-btn:hover {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-border-hover);
}

.filter-btn.active {
  background-color: #FFFFFF;
  color: #0A0B0E;
  border-color: #FFFFFF;
  font-weight: var(--font-weight-semibold);
}

/* ─── 8. WORK 상세 페이지 ────────────────────────────────────────────────── */
.work-detail-hero {
  padding-top: 120px;
  padding-bottom: var(--space-16);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  transition: color var(--duration-fast);
}

.back-link:hover {
  color: var(--color-text-primary);
}

.work-detail-title {
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin: var(--space-4) 0 var(--space-3);
}

.work-detail-summary {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-heading);
  margin-bottom: var(--space-6);
  max-width: 720px;
}

.work-tool-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* 비디오 플레이어 컨테이너 (16:9 반응형) */
.work-video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #000000;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.work-video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.work-detail-cover {
  padding: var(--space-16) 0;
  background-color: var(--color-bg-base);
}

.work-detail-cover-img {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.work-detail-body {
  padding: var(--space-16) 0;
  background-color: var(--color-bg-base);
}

.work-detail-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-body);
  white-space: pre-line;
}

.work-detail-description p + p {
  margin-top: var(--space-6);
}

.work-detail-gallery {
  padding-bottom: var(--space-20);
  background-color: var(--color-bg-base);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.gallery-item {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--duration-fast);
}

.gallery-item:hover {
  border-color: var(--color-border-hover);
}

.gallery-item img {
  width: 100%;
  height: auto;
  max-height: 650px;
  object-fit: contain;
}

/* 이전/다음 내비게이션 */
.work-nav {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
}

.work-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.work-nav-btn {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.work-nav-btn .nav-dir {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}

.work-nav-btn .nav-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  transition: color var(--duration-fast);
}

.work-nav-btn:hover .nav-title {
  color: var(--color-accent);
}

.work-nav-next {
  text-align: right;
  align-items: flex-end;
}

/* ─── 9. ABOUT & CONTACT 페이지 스타일 ───────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.skill-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: border-color var(--duration-fast);
}

.skill-card:hover {
  border-color: var(--color-border-hover);
}

.skill-card-icon {
  font-size: 28px;
  margin-bottom: var(--space-4);
}

.skill-card-title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

/* FAQ 아코디언 */
.faq-list {
  margin-top: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

.accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) 0;
  text-align: left;
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  gap: var(--space-4);
  transition: color var(--duration-fast);
}

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

.accordion-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  transition: transform var(--duration-normal);
}

.accordion-icon::before {
  content: "+";
}

.accordion-btn[aria-expanded="true"] .accordion-icon {
  transform: rotate(45deg);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.accordion-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration-normal) var(--ease-out);
}

.accordion-panel:not([hidden]) {
  max-height: 500px;
}

.accordion-panel-inner {
  padding-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-body);
}

/* Contact 채널 */
.contact-channels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.contact-channel-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast);
}

.contact-channel-link:hover {
  border-color: var(--color-border-hover);
}

.channel-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.channel-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.channel-value {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

/* 폼 스타일 */
.contact-form {
  margin-top: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--duration-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* ─── 10. 스크롤 리빌 애니메이션 ─────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ─── 11. 토스트 알림 ─────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(40px);
  background-color: #FFFFFF;
  color: #0A0B0E;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-out);
  pointer-events: none;
  z-index: 10001;
  box-shadow: var(--shadow-md);
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── 12. 푸터 ───────────────────────────────────────────────────────────── */
.site-footer {
  padding: var(--space-12) 0;
  background-color: var(--color-bg-base);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
}

.footer-link:hover {
  color: var(--color-text-primary);
}

/* ─── 13. 반응형 미디어 쿼리 ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .nav-toggle-btn { display: flex; }
  .works-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .timeline-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .contact-channels { grid-template-columns: 1fr; }
  .section { padding: var(--space-16) 0; }
  .hero-content { padding: var(--space-10) 0 var(--space-12); }
  .hero-title { font-size: 2.25rem; }
  .work-nav-inner { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .work-nav-next { align-items: flex-start; text-align: left; }
}