/* ==========================================================================
   doorBW portfolio — pastel × terminal
   ========================================================================== */

:root {
  /* palette */
  --paper: #fafafd;
  --ink: #26263a;
  --ink-soft: #5c5c76;
  --ink-faint: #9a9ab0;
  --card: #ffffff;
  --line: #ebebf3;

  --lavender: #b9aff5;
  --lavender-deep: #7f6ee0;
  --lavender-soft: #eeebfc;
  --sky: #9ed4f2;
  --sky-deep: #4da3d6;
  --sky-soft: #e4f3fb;
  --mint: #a6e3c8;
  --mint-deep: #43b183;
  --mint-soft: #e5f7ee;
  --peach: #ffcba8;
  --peach-deep: #e8925a;
  --peach-soft: #fff0e4;
  --rose: #ffb8cd;
  --rose-deep: #e56d97;
  --rose-soft: #ffe9f0;

  --grad-hero: linear-gradient(120deg, var(--lavender-deep), var(--sky-deep) 55%, var(--mint-deep));

  /* type */
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Segoe UI", Roboto, "Noto Sans KR", "Noto Sans JP",
    "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Malgun Gothic", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  /* rhythm */
  --container: 1120px;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow-sm: 0 2px 10px rgba(38, 38, 58, 0.05);
  --shadow-md: 0 10px 30px rgba(38, 38, 58, 0.08);
  --shadow-lg: 0 24px 60px rgba(127, 110, 224, 0.16);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html[lang="ja"] body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI",
    "Noto Sans JP", Meiryo, var(--font-sans);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--lavender-soft); color: var(--lavender-deep); }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--font-mono); }

/* ==========================================================================
   nav
   ========================================================================== */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.35s, box-shadow 0.35s, backdrop-filter 0.35s;
}

.nav.scrolled {
  background: rgba(250, 250, 253, 0.94);
  box-shadow: 0 1px 0 var(--line);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav-logo .prompt { color: var(--lavender-deep); }
.nav-logo .cursor-block {
  display: inline-block;
  width: 8px; height: 15px;
  margin-left: 3px;
  background: var(--lavender);
  vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 7px 12px;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover { color: var(--ink); background: var(--lavender-soft); }

.nav-right { display: flex; align-items: center; gap: 12px; }

/* language toggle */
.lang-toggle {
  display: flex;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  box-shadow: var(--shadow-sm);
}

.lang-toggle button {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  padding: 5px 11px;
  border-radius: 999px;
  transition: all 0.25s var(--ease-out);
}

.lang-toggle button:hover { color: var(--ink-soft); }

.lang-toggle button.active {
  color: #fff;
  background: var(--grad-hero);
  box-shadow: 0 3px 10px rgba(127, 110, 224, 0.35);
}

/* hamburger */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px 8px;
}

.nav-burger span {
  display: block;
  width: 20px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}

.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   hero
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.blobs { position: absolute; inset: 0; pointer-events: none; }

/* blur 필터 대신 radial-gradient 사용 — 시각적으로 동일하고 래스터 비용이 훨씬 낮다
   (임베디드/저사양 렌더러에서 filter:blur + 무한 애니메이션 조합은 프리즈를 유발) */
.blob {
  position: absolute;
  border-radius: 50%;
  opacity: 0.55;
  will-change: transform;
  animation: drift 18s ease-in-out infinite alternate;
}

.blob-1 { width: 640px; height: 640px; background: radial-gradient(circle, #b9aff5 0%, #b9aff500 62%); top: -200px; right: -160px; }
.blob-2 { width: 540px; height: 540px; background: radial-gradient(circle, #9ed4f2 0%, #9ed4f200 62%); bottom: -140px; left: -190px; animation-delay: -6s; animation-duration: 22s; }
.blob-3 { width: 430px; height: 430px; background: radial-gradient(circle, #ffb8cd 0%, #ffb8cd00 62%); top: 24%; left: 34%; opacity: 0.34; animation-delay: -12s; animation-duration: 26s; }
.blob-4 { width: 380px; height: 380px; background: radial-gradient(circle, #a6e3c8 0%, #a6e3c800 62%); bottom: 6%; right: 18%; opacity: 0.42; animation-delay: -3s; animation-duration: 20s; }

@keyframes drift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(36px, -30px) scale(1.08); }
  100% { transform: translate(-28px, 24px) scale(0.94); }
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--lavender-deep);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--lavender-soft);
  padding: 6px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.hero-eyebrow .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mint-deep);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(67, 177, 131, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(67, 177, 131, 0); }
}

.hero h1 {
  font-size: clamp(2.7rem, 6.4vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 22px 0 6px;
}

.hero h1 .grad {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.1vw, 1.25rem);
  font-weight: 600;
  color: var(--ink-soft);
  min-height: 1.8em;
  margin-bottom: 18px;
}

.hero-role .typed-cursor {
  display: inline-block;
  width: 2px; height: 1.05em;
  background: var(--lavender-deep);
  vertical-align: -2px;
  margin-left: 2px;
  animation: blink 0.9s steps(1) infinite;
}

@keyframes blink { 0%, 55% { opacity: 1; } 56%, 100% { opacity: 0; } }

.hero-desc {
  max-width: 34em;
  color: var(--ink-soft);
  font-size: 1.02rem;
  margin-bottom: 30px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 999px;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.25s;
}

.btn-primary {
  color: #fff;
  background: var(--grad-hero);
  box-shadow: 0 8px 22px rgba(127, 110, 224, 0.32);
}

.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(127, 110, 224, 0.42); }

.btn-ghost {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.btn-ghost:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--lavender); }

/* terminal card */
.terminal-wrap { position: relative; }

.terminal {
  position: relative;
  /* backdrop-filter 금지: float 애니메이션과 결합 시 매 프레임 재블러 → 저사양 렌더러 프리즈 */
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid rgba(185, 175, 245, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-0.4deg); }
  50% { transform: translateY(-14px) rotate(0.4deg); }
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, var(--lavender-soft), var(--sky-soft), var(--mint-soft));
}

.t-dot { width: 11px; height: 11px; border-radius: 50%; }
.t-dot.r { background: var(--rose); }
.t-dot.y { background: var(--peach); }
.t-dot.g { background: var(--mint); }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-left: auto;
}

.terminal-body {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.9;
  padding: 20px 22px 24px;
  min-height: 250px;
}

.t-line { white-space: pre-wrap; word-break: break-all; opacity: 0; transform: translateY(6px); }
.t-line.shown { opacity: 1; transform: none; transition: opacity 0.4s, transform 0.4s var(--ease-out); }

.t-line .p { color: var(--lavender-deep); font-weight: 700; }
.t-line .k { color: var(--sky-deep); }
.t-line .v { color: var(--ink); }
.t-line .c { color: var(--ink-faint); }

.t-chip {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.terminal-caret {
  display: inline-block;
  width: 8px; height: 14px;
  background: var(--lavender);
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}

/* scroll hint */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
}

.scroll-hint .wheel {
  width: 22px; height: 34px;
  border: 2px solid var(--ink-faint);
  border-radius: 12px;
  position: relative;
  opacity: 0.7;
}

.scroll-hint .wheel::after {
  content: "";
  position: absolute;
  top: 6px; left: 50%;
  width: 3px; height: 7px;
  margin-left: -1.5px;
  border-radius: 3px;
  background: var(--lavender-deep);
  animation: wheel 1.6s ease-in-out infinite;
}

@keyframes wheel {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ==========================================================================
   sections (shared)
   ========================================================================== */

.section { padding: 104px 0; position: relative; }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 12px;
}

.section-sub { color: var(--ink-soft); max-width: 44em; margin-bottom: 48px; }

/* per-section accent */
.acc-lavender .section-eyebrow { background: var(--lavender-soft); color: var(--lavender-deep); }
.acc-sky .section-eyebrow { background: var(--sky-soft); color: var(--sky-deep); }
.acc-mint .section-eyebrow { background: var(--mint-soft); color: var(--mint-deep); }
.acc-peach .section-eyebrow { background: var(--peach-soft); color: var(--peach-deep); }
.acc-rose .section-eyebrow { background: var(--rose-soft); color: var(--rose-deep); }

/* reveal */
.reveal { opacity: 0; transform: translateY(28px); }

.reveal.visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

/* ==========================================================================
   about
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  align-items: start;
}

.avatar-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 4 / 4.6;
  background: linear-gradient(150deg, var(--lavender-soft), var(--sky-soft) 50%, var(--mint-soft));
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-card img { width: 100%; height: 100%; object-fit: cover; display: block; }

.avatar-fallback {
  font-family: var(--font-mono);
  font-size: 3.4rem;
  font-weight: 800;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.avatar-tag {
  position: absolute;
  bottom: 14px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.92);
  padding: 6px 13px;
  border-radius: 999px;
  white-space: nowrap;
}

.about-body p { color: var(--ink-soft); margin-bottom: 16px; font-size: 1.01rem; }
.about-body p strong { color: var(--ink); font-weight: 700; }

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.hl {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s;
}

.hl:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--lavender); }

.hl-icon {
  flex: none;
  width: 38px; height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 1.05rem;
}

.hl:nth-child(4n+1) .hl-icon { background: var(--lavender-soft); }
.hl:nth-child(4n+2) .hl-icon { background: var(--sky-soft); }
.hl:nth-child(4n+3) .hl-icon { background: var(--mint-soft); }
.hl:nth-child(4n+4) .hl-icon { background: var(--peach-soft); }

.hl b { display: block; font-size: 0.93rem; margin-bottom: 2px; }
.hl span { font-size: 0.84rem; color: var(--ink-soft); line-height: 1.5; }

/* ==========================================================================
   career timeline
   ========================================================================== */

.timeline { position: relative; margin-left: 10px; }

.timeline::before {
  content: "";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(var(--lavender), var(--sky), var(--mint), var(--peach));
  border-radius: 2px;
}

.tl-item { position: relative; padding: 0 0 44px 38px; }
.tl-item:last-child { padding-bottom: 0; }

.tl-node {
  position: absolute;
  left: -8px; top: 6px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--lavender);
  box-shadow: 0 0 0 5px rgba(185, 175, 245, 0.18);
}

.tl-item[data-color="sky"] .tl-node { border-color: var(--sky); box-shadow: 0 0 0 5px rgba(158, 212, 242, 0.2); }
.tl-item[data-color="mint"] .tl-node { border-color: var(--mint); box-shadow: 0 0 0 5px rgba(166, 227, 200, 0.22); }
.tl-item[data-color="peach"] .tl-node { border-color: var(--peach); box-shadow: 0 0 0 5px rgba(255, 203, 168, 0.25); }

.tl-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.tl-card:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }

.tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 4px;
}

.tl-org { font-size: 1.15rem; font-weight: 800; letter-spacing: -0.01em; }

.tl-term {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--ink-faint);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 3px 10px;
  border-radius: 999px;
}

.tl-role { font-size: 0.9rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 12px; }

.tl-points { margin-bottom: 14px; }

.tl-points li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 5px;
}

.tl-points li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--lavender-deep);
}

.tag-row { display: flex; flex-wrap: wrap; gap: 7px; }

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--lavender-soft);
  color: var(--lavender-deep);
  transition: transform 0.2s var(--ease-out);
}

.tag:hover { transform: scale(1.08); }

.tag-row .tag:nth-child(5n+2) { background: var(--sky-soft); color: var(--sky-deep); }
.tag-row .tag:nth-child(5n+3) { background: var(--mint-soft); color: var(--mint-deep); }
.tag-row .tag:nth-child(5n+4) { background: var(--peach-soft); color: var(--peach-deep); }
.tag-row .tag:nth-child(5n) { background: var(--rose-soft); color: var(--rose-deep); }

/* ==========================================================================
   skills
   ========================================================================== */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.skill-group {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.skill-group:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.sg-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.sg-icon {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  border-radius: 13px;
}

.skill-group:nth-child(4n+1) .sg-icon { background: var(--lavender-soft); }
.skill-group:nth-child(4n+2) .sg-icon { background: var(--sky-soft); }
.skill-group:nth-child(4n+3) .sg-icon { background: var(--mint-soft); }
.skill-group:nth-child(4n+4) .sg-icon { background: var(--peach-soft); }

.sg-name { font-size: 1.02rem; font-weight: 800; }

/* 스킬은 게이지 대신 태그 칩으로 표현 */
.skill-tags { gap: 10px; }

.skill-tags .tag {
  font-size: 0.82rem;
  padding: 8px 16px;
}

/* ==========================================================================
   projects
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 44px; /* 이 섹션은 부제 없이 제목 바로 아래 그리드가 온다 */
}

.proj {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out), border-color 0.35s;
  overflow: hidden;
}

.proj::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--accent, var(--lavender));
  opacity: 0.85;
}

.proj:hover {
  transform: translateY(-8px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent, var(--lavender));
}

.proj-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.proj-status .sdot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--mint-deep);
  animation: pulse 2.4s ease-in-out infinite;
}

.proj-status.building .sdot { background: var(--peach-deep); }
.proj-status.paused .sdot { background: var(--ink-faint); animation: none; }

.proj h3 {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.proj h3 .ext {
  font-size: 0.75rem;
  color: var(--ink-faint);
  transition: transform 0.25s var(--ease-out), color 0.25s;
}

.proj:hover h3 .ext { transform: translate(2px, -2px); color: var(--lavender-deep); }

.proj p { font-size: 0.89rem; color: var(--ink-soft); flex: 1; margin-bottom: 18px; }

/* ==========================================================================
   activities
   ========================================================================== */

.acts-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

.act-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.act-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.act-mentoring { grid-column: span 7; background: linear-gradient(135deg, #fff 40%, var(--lavender-soft)); }
.act-book { grid-column: span 5; background: linear-gradient(135deg, #fff 40%, var(--peach-soft)); }
.act-talks { grid-column: span 7; }
.act-certs { grid-column: span 5; }

.act-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.act-icon {
  width: 42px; height: 42px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  border-radius: 13px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.act-title { font-size: 1.06rem; font-weight: 800; }
.act-sub { font-size: 0.8rem; color: var(--ink-soft); font-weight: 500; }

.act-desc { font-size: 0.9rem; color: var(--ink-soft); margin-bottom: 14px; }

.act-list li {
  position: relative;
  font-size: 0.88rem;
  color: var(--ink-soft);
  padding: 7px 0 7px 20px;
  border-bottom: 1px dashed var(--line);
}

.act-list li:last-child { border-bottom: none; }

.act-list li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  color: var(--lavender-deep);
}

.act-list li a { font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--lavender); transition: color 0.2s; }
.act-list li a:hover { color: var(--lavender-deep); }

.act-list .yr { font-family: var(--font-mono); font-size: 0.68rem; color: var(--ink-faint); margin-right: 6px; }

.mentor-count {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
}

.mentor-count-label { font-size: 0.85rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 16px; }

.book-cover {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--peach-deep);
  background: #fff;
  border: 1px solid var(--peach);
  border-radius: 12px;
  padding: 12px 16px;
  display: inline-block;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}

.cert-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 700;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 16px;
  margin: 0 8px 10px 0;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease-out), border-color 0.25s;
}

.cert-chip:hover { transform: translateY(-3px) scale(1.03); border-color: var(--mint); }

.cert-chip .yr { font-family: var(--font-mono); font-size: 0.68rem; color: var(--ink-faint); }

/* ==========================================================================
   contact
   ========================================================================== */

.contact-panel {
  position: relative;
  text-align: center;
  border-radius: var(--radius-lg);
  padding: 76px 32px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--lavender-soft), var(--sky-soft) 34%, var(--mint-soft) 68%, var(--rose-soft));
  border: 1px solid rgba(185, 175, 245, 0.4);
  box-shadow: var(--shadow-md);
}

.contact-panel .section-title { margin-bottom: 10px; }

.contact-desc { color: var(--ink-soft); max-width: 36em; margin: 0 auto 30px; }

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 22px;
}

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

.footer {
  padding: 40px 0 46px;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.8rem;
}

.footer .mono { font-size: 0.72rem; margin-top: 6px; opacity: 0.7; }

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .terminal-wrap { max-width: 560px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .avatar-card { max-width: 320px; }
  .skills-grid { grid-template-columns: 1fr; }
  .act-mentoring, .act-book, .act-talks, .act-certs { grid-column: span 12; }
}

@media (max-width: 700px) {
  .section { padding: 72px 0; }
  .hero { padding-top: 104px; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }

  .nav-burger { display: flex; }

  .nav-links {
    position: fixed;
    top: 68px;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: #fbfbfd;
    padding: 14px 20px 20px;
    box-shadow: 0 18px 30px rgba(38, 38, 58, 0.08);
    transform: translateY(-130%);
    transition: transform 0.4s var(--ease-out);
  }

  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 12px 14px; font-size: 0.95rem; }
}

@media (max-width: 420px) {
  .hero-ctas .btn { padding: 11px 18px; font-size: 0.88rem; }
  .terminal-body { font-size: 0.74rem; padding: 16px; min-height: 260px; }
}

/* ==========================================================================
   performance — 화면 밖 히어로의 무한 애니메이션 일시정지 (배터리/저사양 렌더러)
   ========================================================================== */

.hero.offstage .blob,
.hero.offstage .terminal,
.hero.offstage .terminal-caret,
.hero.offstage .typed-cursor,
.hero.offstage .hero-eyebrow .dot,
.hero.offstage .scroll-hint .wheel::after {
  animation-play-state: paused;
}

/* QA/스크린샷용 정적 모드: index.html?static */
.static-mode *,
.static-mode *::before,
.static-mode *::after {
  animation: none !important;
  transition: none !important;
}

.static-mode .reveal { opacity: 1; transform: none; }

/* ==========================================================================
   reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .blob, .terminal,
  .nav-logo .cursor-block, .hero-role .typed-cursor,
  .terminal-caret, .proj-status .sdot,
  .hero-eyebrow .dot, .scroll-hint .wheel::after {
    animation: none !important;
  }

  .reveal { opacity: 1; transform: none; }
  .reveal.visible { transition: none; }

  * { transition-duration: 0.01ms !important; }
}