/* ===========================================
   Base & Reset
=========================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  background-color: #faf9f7;
  color: #111110;
  font-family: 'Pretendard', 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.65;
  letter-spacing: 0.015em;
  word-break: keep-all;
}

/* 섹션 앵커 스크롤 여백 — Contact 등 하단 섹션이 Experience에서 멈추는 문제 해결 */
section[id] {
  scroll-margin-top: 80px;
}

/* ===========================================
   Header
=========================================== */
#header.scrolled {
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid #e5e0d8;
}

.nav-link {
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: #111110;
  transition: width 0.3s ease;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: #111110; }

.hamburger-line:nth-child(1).open { transform: translateY(6px) rotate(45deg); }
.hamburger-line:nth-child(2).open { opacity: 0; }
.hamburger-line:nth-child(3).open { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu { background: rgba(250, 249, 247, 0.97); }

/* ===========================================
   Hero
=========================================== */

.hero-mesh {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(147, 51, 234, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(147, 51, 234, 0.08) 0px, transparent 50%);
}

.hero-mesh-mouse {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    circle 600px at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(99, 102, 241, 0.12),
    transparent 80%
  );
  transition: opacity 0.5s ease;
}

html.dark .hero-mesh {
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(147, 51, 234, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(147, 51, 234, 0.15) 0px, transparent 50%);
}

html.dark .hero-mesh-mouse {
  background: radial-gradient(
    circle 600px at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(99, 102, 241, 0.2),
    transparent 80%
  );
}

.hero-label {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #57534e;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.75rem, 6.5vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: #111110;
  margin-bottom: 2rem;
  white-space: nowrap;
  /* 헤딩은 body letter-spacing 상속 차단 */
  letter-spacing: -0.03em;
}

.hero-bottom {
  max-width: 420px;
}

.hero-desc {
  font-size: 1rem;
  color: #57534e;
  line-height: 1.8;
}

.scroll-hint {
  margin-top: 4rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.scroll-hint-arrow {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, #d5cfc8, transparent);
  position: relative;
  overflow: hidden;
}
.scroll-hint-arrow::after {
  content: '';
  position: absolute;
  top: -40%;
  left: 0;
  width: 100%;
  height: 40%;
  background: linear-gradient(to bottom, transparent, #8c8480);
  animation: scroll-drop 2s ease-in-out infinite;
}
@keyframes scroll-drop {
  0%   { top: -40%; }
  100% { top: 140%; }
}

/* ===========================================
   Buttons
=========================================== */
.btn-dark {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.6rem;
  background: #111110;
  color: #faf9f7;
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: 9999px;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.btn-dark:hover {
  background: #3d3935;
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.6rem;
  background: transparent;
  color: #3d3935;
  font-weight: 600;
  font-size: 0.85rem;
  border: 1.5px solid #e5e0d8;
  border-radius: 9999px;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}
.btn-outline:hover {
  border-color: #111110;
  transform: translateY(-1px);
}

/* ===========================================
   Section labels & headings
=========================================== */
.section-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #a09890;
}
.section-eyebrow-inv {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}

.section-heading {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #111110;
  line-height: 1.1;
}
.section-heading-inv {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #faf9f7;
  line-height: 1.1;
}

/* ===========================================
   About
=========================================== */
.about-headline {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.3;
  color: #111110;
}

.stat-num {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #111110;
  line-height: 1;
}
.stat-label {
  font-size: 0.75rem;
  color: #8c8480;
  margin-top: 0.25rem;
}

.kw {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  font-size: 0.77rem;
  font-weight: 500;
  border-radius: 9999px;
  border: 1px solid #e5e0d8;
  color: #8c8480;
  background: #fff;
  transition: border-color 0.2s, color 0.2s;
}
.kw:hover {
  border-color: #111110;
  color: #111110;
}

/* ===========================================
   Skills (dark section)
=========================================== */
.skills-cat {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(250,249,247,0.3);
}

.skill-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  width: 3.4rem;
}
.skill-icon {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}
.skill-label {
  font-size: 0.62rem;
  font-weight: 500;
  color: rgba(250,249,247,0.6);
  text-align: center;
  line-height: 1.2;
  word-break: keep-all;
}

/* ===========================================
   Experience
=========================================== */
.exp-block {
  border-top: 1px solid #e5e0d8;
  padding: 2rem 0;
}

.exp-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.exp-co {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #111110;
}

.exp-date {
  font-size: 0.8rem;
  color: #8c8480;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.badge-now {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 9999px;
  background: #111110;
  color: #faf9f7;
}

.exp-role {
  font-size: 0.875rem;
  color: #57534e;
  margin-bottom: 1rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

.exp-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.exp-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: #c8c2bb;
  text-underline-offset: 2px;
  transition: color 0.2s, text-decoration-color 0.2s;
}
.exp-link:hover {
  color: #111110;
  text-decoration-color: #111110;
}
.exp-items li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #3d3935;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

/* Experience tags */
.et {
  flex-shrink: 0;
  display: inline-block;
  padding: 0.1rem 0.45rem;
  font-size: 0.63rem;
  font-weight: 700;
  border-radius: 3px;
  margin-top: 0.18rem;
  letter-spacing: 0.03em;
  min-width: 4rem;
  text-align: center;
}
.et-web     { background: #f0ebff; color: #6d28d9; }
.et-kiosk   { background: #fff3e8; color: #c2410c; }
.et-renewal { background: #fef9e7; color: #92400e; }
.et-dev     { background: #ecfdf5; color: #065f46; }
.et-maint   { background: #fef3c7; color: #78350f; }
.et-self     { background: #e0f2fe; color: #0369a1; }
.et-refactor { background: #f0fdf4; color: #166534; }

/* ===========================================
   Projects
=========================================== */
.project-card {
  display: flex;
  flex-direction: column;
  border: 1.5px solid #e5e0d8;
  border-radius: 12px;
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.project-card:hover {
  border-color: #111110;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-3px);
}
.project-type {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8c8480;
}
.project-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #111110;
  margin-top: 0.5rem;
}
.project-desc {
  font-size: 0.875rem;
  color: #57534e;
  line-height: 1.65;
  margin-top: 0.75rem;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 1rem;
}
.project-tag {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border: 1px solid #e5e0d8;
  border-radius: 9999px;
  color: #8c8480;
  transition: border-color 0.2s, color 0.2s;
}
.project-card:hover .project-tag {
  border-color: #c8c2bb;
  color: #57534e;
}
.project-card > div:first-child {
  flex: 1;
}
.project-links {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 1.25rem;
}
.project-btn {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.project-btn--demo {
  background: #111110;
  color: #faf9f7;
}
.project-btn--demo:hover {
  background: #3d3935;
}
.project-btn--git {
  border: 1.5px solid #e5e0d8;
  color: #57534e;
}
.project-btn--git:hover {
  border-color: #111110;
  color: #111110;
}

/* ===========================================
   Projects Swiper
=========================================== */
.projects-swiper {
  padding-top: 6px !important;
  margin-top: -6px;
}

.projects-swiper .swiper-slide {
  height: auto;
  display: flex;
}

.projects-swiper .project-card {
  flex: 1;
}

.proj-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
}

.proj-pagination {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.proj-pagination .swiper-pagination-bullet {
  width: 6px;
  height: 6px;
  background: #d5cfc8;
  opacity: 1;
  border-radius: 9999px;
  cursor: pointer;
  transition: background 0.25s, width 0.25s;
  margin: 0 !important;
}

.proj-pagination .swiper-pagination-bullet-active {
  background: #111110;
  width: 20px;
}

.proj-arrows {
  display: flex;
  gap: 0.5rem;
}

.proj-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  border: 1.5px solid #e5e0d8;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #57534e;
  transition: border-color 0.2s, color 0.2s;
}

.proj-btn:hover:not(:disabled) {
  border-color: #111110;
  color: #111110;
}

.proj-btn.swiper-button-disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===========================================
   Contact (dark section)
=========================================== */
.contact-heading {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #faf9f7;
  line-height: 1.1;
  margin-top: 1rem;
}

.cta-light {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: #faf9f7;
  color: #111110;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 9999px;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.cta-light:hover {
  background: #fff;
  transform: translateY(-1px);
}

.cta-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: transparent;
  color: rgba(250,249,247,0.55);
  font-weight: 600;
  font-size: 0.875rem;
  border: 1.5px solid rgba(255,255,255,0.15);
  border-radius: 9999px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
}
.cta-outline:hover {
  border-color: rgba(255,255,255,0.5);
  color: #faf9f7;
  transform: translateY(-1px);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  background: #faf9f7;
  border: 1px solid #e5e0d8;
  color: #111110;
  padding: 0.65rem 1.4rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 100;
  white-space: nowrap;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===========================================
   Marquee (pill tags)
=========================================== */
.mq-wrap {
  margin: 2.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow: hidden;
}

.mq-row {
  overflow: hidden;
  white-space: nowrap;
}

.mq-belt {
  display: inline-flex;
  gap: 0.6rem;
  animation: mq-left 50s linear infinite;
}

.mq-row--reverse .mq-belt {
  animation-name: mq-right;
  animation-duration: 55s;
}

.mq-wrap:hover .mq-belt {
  animation-play-state: paused;
}

.mq-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  border: 1.5px solid #e5e0d8;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #57534e;
  background: #fff;
  white-space: nowrap;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
  cursor: default;
  user-select: none;
}

.mq-tag:hover {
  border-color: #111110;
  color: #111110;
}

@keyframes mq-left {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes mq-right {
  0%   { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

/* ===========================================
   Typing cursor
=========================================== */
.typing-cursor {
  display: inline-block;
  color: inherit;
  font-weight: 300;
  margin-left: 4px;
  animation: blink 0.7s step-end infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ===========================================
   Scroll to Top
=========================================== */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.5rem;
  height: 2.5rem;
  background: #78716c;
  border: none;
  border-radius: 9999px;
  color: #faf9f7;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.2s, background 0.2s;
  z-index: 50;
}
.scroll-top-btn:hover {
  background: #57534e;
  transform: translateY(-2px);
}
.scroll-top-btn.visible { opacity: 1; pointer-events: auto; }

/* ===========================================
   Fade-up animations
=========================================== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ===========================================
   Responsive
=========================================== */
@media (max-width: 640px) {
  .hero-title { letter-spacing: -0.03em; }
  .exp-meta   { flex-direction: column; gap: 0.25rem; }
  .exp-items li { display: block; }
  .et { display: block; width: fit-content; margin-bottom: 0.3rem; }
  .toast      { width: calc(100% - 2rem); white-space: normal; text-align: center; }
  .scroll-top-btn { bottom: 1rem; right: 1rem; }
}

/* ===========================================
   Reduced motion (접근성)
=========================================== */
@media (prefers-reduced-motion: reduce) {
  /* 마퀴 정지 */
  .mq-belt { animation: none; }

  /* 타이핑 커서 blink 정지 */
  .typing-cursor { animation: none; opacity: 1; }

  /* fade-up 즉시 노출 (트랜지션 제거) */
  .fade-up { opacity: 1; transform: none; transition: none; }
  .fade-up.in-view { opacity: 1; transform: none; }
}

/* ===========================================
   Dark Mode Overrides
=========================================== */
html.dark body { background-color: #111110; color: #faf9f7; }

html.dark .hero-title,
html.dark .about-headline,
html.dark .stat-num,
html.dark .exp-co,
html.dark .project-name,
html.dark .section-heading { color: #faf9f7; }

html.dark .hero-label,
html.dark .hero-desc,
html.dark .exp-role,
html.dark .project-desc { color: #a09890; }

html.dark .nav-link::after { background: #6366f1; }
html.dark .nav-link.active { color: #6366f1; }

html.dark .btn-dark { background: #faf9f7; color: #111110; }
html.dark .btn-dark:hover { background: #d5cfc8; }
html.dark .btn-outline { color: #e5e0d8; border-color: #57534e; }
html.dark .btn-outline:hover { border-color: #faf9f7; color: #faf9f7; }

html.dark .kw { background: transparent; border-color: #333333; color: #a09890; }
html.dark .kw:hover { border-color: #faf9f7; color: #faf9f7; }

html.dark .badge-now { background: #faf9f7; color: #111110; }
html.dark .exp-link { text-decoration-color: #57534e; }
html.dark .exp-link:hover { color: #faf9f7; text-decoration-color: #faf9f7; }
html.dark .exp-items li { color: #e5e0d8; }

html.dark .project-card { border-color: #333333; }
html.dark .project-card:hover { border-color: #faf9f7; }
html.dark .project-btn--demo { background: #faf9f7; color: #111110; }
html.dark .project-btn--demo:hover { background: #d5cfc8; }
html.dark .project-btn--git { border-color: #57534e; color: #e5e0d8; }
html.dark .project-btn--git:hover { border-color: #faf9f7; color: #faf9f7; }

html.dark .mq-tag { background: transparent; border-color: #333333; color: #e5e0d8; }
html.dark .mq-tag:hover { border-color: #faf9f7; color: #faf9f7; }

html.dark .proj-btn { background: transparent; border-color: #333333; color: #e5e0d8; }
html.dark .proj-btn:hover:not(:disabled) { border-color: #faf9f7; color: #faf9f7; }

html.dark .proj-pagination .swiper-pagination-bullet { background: #57534e; }
html.dark .proj-pagination .swiper-pagination-bullet-active { background: #faf9f7; }

html.dark #header.scrolled { background: rgba(17, 17, 16, 0.92); border-color: #333; }
html.dark .mobile-menu { background: rgba(17, 17, 16, 0.97); }

html.dark .toast { background: #1a1a19; border-color: #333; color: #faf9f7; }