/* ─── Reset & Base ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d0f14;
  --bg2:       #13161e;
  --bg3:       #1a1e29;
  --border:    #252a38;
  --text:      #e8eaf0;
  --muted:     #7a8099;
  --accent:    #7c6af7;
  --accent2:   #5af0c4;
  --gold:      #f5c842;
  --font:      'Inter', sans-serif;
  --mono:      'JetBrains Mono', monospace;
  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 4px 24px rgba(0,0,0,.35);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ─── Nav ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 60px;
  background: rgba(13,15,20,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent);
  letter-spacing: .05em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: .85rem;
  color: var(--muted);
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 5rem;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(124,106,247,.18) 0%, transparent 70%),
    var(--bg);
}

.hero-inner {
  max-width: 680px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .78rem;
  font-family: var(--mono);
  color: var(--accent2);
  background: rgba(90,240,196,.08);
  border: 1px solid rgba(90,240,196,.2);
  border-radius: 999px;
  padding: .3rem .9rem;
  margin-bottom: 1.8rem;
}

.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent2);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .4; }
}

.hero-name {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 40%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .6rem;
}

.hero-title {
  font-size: 1rem;
  color: var(--muted);
  font-family: var(--mono);
  margin-bottom: 1.4rem;
}

.hero-desc {
  font-size: 1rem;
  color: #b0b8cc;
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}
.hero-desc strong { color: var(--text); }
.hero-desc em     { color: var(--accent2); font-style: normal; }

/* Console hint */
.console-hint {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-top: 2rem;
  padding: .55rem 1.1rem;
  background: rgba(124,106,247,.06);
  border: 1px solid rgba(124,106,247,.2);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--muted);
  cursor: pointer;
  transition: all .25s;
  animation: ch-pulse 3s ease-in-out infinite;
}
.console-hint:hover {
  background: rgba(124,106,247,.12);
  border-color: rgba(124,106,247,.45);
  color: var(--text);
  transform: translateY(-1px);
  animation: none;
}
.console-hint.ch-clicked {
  border-color: var(--accent2);
  color: var(--accent2);
  animation: none;
}
@keyframes ch-pulse {
  0%, 100% { opacity: .55; }
  50%       { opacity: 1; }
}

.ch-prompt { color: var(--accent); font-weight: 700; }
.ch-fn     { color: var(--accent2); }
.ch-str    { color: var(--gold); }
.ch-key {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: .1rem .45rem;
  font-size: .7rem;
  color: var(--muted);
  margin-left: .2rem;
}
.console-hint:hover .ch-key {
  border-color: rgba(124,106,247,.4);
  color: var(--accent);
}

/* Buttons */
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem 1.2rem;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 500;
  transition: all .2s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: #9484ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124,106,247,.4);
}

.btn-secondary {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ─── Main Layout ───────────────────────────────────── */
.main {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 2rem 6rem;
}

.section {
  padding: 5rem 0 0;
}

.section-title {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
}

.tag {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 500;
  color: var(--accent);
  background: rgba(124,106,247,.12);
  border: 1px solid rgba(124,106,247,.25);
  border-radius: 6px;
  padding: .15rem .5rem;
}

/* ─── Education ─────────────────────────────────────── */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.edu-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  display: flex;
  gap: 1.5rem;
  align-items: stretch;
  transition: border-color .2s, transform .2s;
}
.edu-card:hover {
  border-color: rgba(124,106,247,.4);
  transform: translateY(-2px);
}
.edu-card.current {
  border-color: rgba(90,240,196,.25);
  background: linear-gradient(135deg, var(--bg2), rgba(90,240,196,.04));
}
.edu-card.current:hover {
  border-color: rgba(90,240,196,.5);
}

.edu-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
  min-width: 80px;
}

.edu-period {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--muted);
  white-space: nowrap;
  text-align: center;
}

.edu-line {
  flex: 1;
  width: 2px;
  background: var(--border);
  border-radius: 1px;
  min-height: 12px;
}
.edu-card.current .edu-line {
  background: linear-gradient(to bottom, var(--accent2), transparent);
}

.edu-school {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .15rem;
}

.edu-dept {
  font-size: .92rem;
  font-weight: 400;
  color: var(--muted);
  margin-bottom: .6rem;
}

.edu-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 600;
  padding: .18rem .6rem;
  border-radius: 999px;
  letter-spacing: .03em;
}
.current-badge {
  background: rgba(90,240,196,.12);
  color: var(--accent2);
  border: 1px solid rgba(90,240,196,.3);
}
.grad-badge {
  background: rgba(124,106,247,.12);
  color: var(--accent);
  border: 1px solid rgba(124,106,247,.25);
}

/* ─── Timeline ──────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.timeline-item {
  position: relative;
  padding: 0 0 2rem 2rem;
}

.timeline-dot {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 3px rgba(124,106,247,.25);
}

.timeline-item.activity .timeline-dot {
  background: var(--accent2);
  box-shadow: 0 0 0 3px rgba(90,240,196,.2);
}

.tl-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: .25rem;
}

.company {
  font-weight: 600;
  font-size: 1rem;
}

.period {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--muted);
}

.role {
  color: var(--muted);
  font-size: .9rem;
}

/* ─── Awards Grid ───────────────────────────────────── */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.award-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color .2s, transform .2s;
}
.award-card:hover {
  border-color: rgba(124,106,247,.4);
  transform: translateY(-2px);
}

.award-card.highlight {
  border-color: rgba(245,200,66,.25);
  background: linear-gradient(135deg, var(--bg2), rgba(245,200,66,.04));
}
.award-card.highlight:hover {
  border-color: rgba(245,200,66,.5);
}

.award-icon { font-size: 1.5rem; flex-shrink: 0; }

.award-title {
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: .3rem;
  line-height: 1.4;
}

.award-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.award-title a:hover {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
}

.award-meta {
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: .6rem;
  line-height: 1.5;
}

.award-prize {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-family: var(--mono);
  letter-spacing: .03em;
}
.award-prize.grand    { background: rgba(245,200,66,.15); color: var(--gold); border: 1px solid rgba(245,200,66,.3); }
.award-prize.encourage{ background: rgba(90,240,196,.1);  color: var(--accent2); border: 1px solid rgba(90,240,196,.25); }
.award-prize.third    { background: rgba(124,106,247,.12); color: var(--accent); border: 1px solid rgba(124,106,247,.25); }
.award-prize.best     { background: rgba(255,180,100,.1);  color: #ffb464; border: 1px solid rgba(255,180,100,.25); }

/* ─── Publications ──────────────────────────────────── */
.pub-list { display: flex; flex-direction: column; gap: 1rem; }

.pub-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: border-color .2s, transform .2s;
}
.pub-card:hover {
  border-color: rgba(124,106,247,.4);
  transform: translateY(-2px);
}

.pub-venue {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 600;
  padding: .3rem .65rem;
  border-radius: 6px;
  align-self: flex-start;
  letter-spacing: .03em;
  margin-top: .1rem;
}
.pub-venue.acl   { background: rgba(124,106,247,.15); color: var(--accent); border: 1px solid rgba(124,106,247,.3); }
.pub-venue.emnlp { background: rgba(90,240,196,.1);   color: var(--accent2); border: 1px solid rgba(90,240,196,.25); }
.pub-venue.under { background: rgba(150,150,150,.1);  color: var(--muted);   border: 1px solid rgba(150,150,150,.25); }

.pub-title {
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: .4rem;
}

.pub-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.pub-title a:hover {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
}

.pub-authors {
  font-size: .82rem;
  color: var(--muted);
  margin-bottom: .5rem;
}
.pub-authors strong { color: var(--accent2); }

.pub-github {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .2rem .6rem;
  transition: color .2s, border-color .2s;
}
.pub-github:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ─── Patents ───────────────────────────────────────── */
.patent-list { display: flex; flex-direction: column; gap: .75rem; }

.patent-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color .2s;
}
.patent-item:hover { border-color: rgba(124,106,247,.35); }

.patent-flag {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  padding: .2rem .5rem;
  border-radius: 4px;
  margin-top: .1rem;
  letter-spacing: .05em;
}
.patent-flag.kr { background: rgba(255,80,80,.12); color: #ff8080; border: 1px solid rgba(255,80,80,.25); }
.patent-flag.us { background: rgba(90,140,255,.12); color: #7fb3ff; border: 1px solid rgba(90,140,255,.25); }

.patent-title {
  font-size: .9rem;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: .2rem;
}

.patent-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.patent-title a:hover {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
}

.patent-num {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--muted);
}

/* ─── Footer ────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .82rem;
  line-height: 2;
}
.footer-sub { font-family: var(--mono); font-size: .75rem; }

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links { display: none; }
  .awards-grid { grid-template-columns: 1fr; }
  .pub-card { flex-direction: column; gap: .75rem; }
  .tl-header { flex-direction: column; }
  .hero { padding-top: 6rem; }
}

/* ─── Easter Eggs ───────────────────────────────────── */

/* Egg 1 — Jailbreak */
.easter-jailbreak {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.82); backdrop-filter: blur(8px);
  animation: ee-in .3s ease;
}
.ejb-box {
  background: #160808; border: 2px solid rgba(255,80,80,.5);
  border-radius: 16px; padding: 2.5rem 3rem;
  text-align: center; max-width: 380px;
  box-shadow: 0 0 60px rgba(255,40,40,.2);
  animation: ee-up .3s ease;
}
.ejb-icon  { font-size: 3rem; margin-bottom: 1rem; }
.ejb-badge {
  display: inline-block; font-family: var(--mono);
  font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  color: #ff6b6b; background: rgba(255,80,80,.12);
  border: 1px solid rgba(255,80,80,.3);
  border-radius: 6px; padding: .3rem .8rem; margin-bottom: 1rem;
}
.ejb-msg   { font-size: .95rem; color: var(--text); line-height: 1.75; margin-bottom: 1rem; }
.ejb-egg   { font-family: var(--mono); font-size: .8rem; color: var(--accent2); margin-bottom: .4rem; }
.ejb-timer { font-family: var(--mono); font-size: .7rem; color: var(--muted); }

/* Egg 2 — Terminal */
.easter-terminal {
  position: fixed; bottom: 2rem; right: 2rem;
  width: min(560px, 92vw); height: 360px;
  background: #07090d;
  border: 1px solid rgba(124,106,247,.45);
  border-radius: 12px;
  box-shadow: 0 24px 64px rgba(0,0,0,.8), 0 0 40px rgba(124,106,247,.12);
  z-index: 9000; display: flex; flex-direction: column;
  animation: ee-up .25s ease; overflow: hidden;
}
.et-hdr {
  display: flex; align-items: center; gap: .75rem;
  padding: .55rem 1rem;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.et-dots { display: flex; gap: .42rem; }
.et-dots span { width: 12px; height: 12px; border-radius: 50%; cursor: pointer; }
.ed-r { background: #ff5f57; } .ed-r:hover { filter: brightness(.75); }
.ed-y { background: #febc2e; }
.ed-g { background: #28c840; }
.et-title { font-family: var(--mono); font-size: .75rem; color: var(--muted); flex: 1; text-align: center; }
.et-body  { flex: 1; overflow-y: auto; padding: .75rem 1rem; font-family: var(--mono); font-size: .78rem; line-height: 1.7; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
.et-info  { color: var(--accent2); margin-bottom: .2rem; }
.et-line  { color: var(--text); margin-top: .5rem; }
.et-ps    { color: var(--accent); font-weight: 600; margin-right: .3rem; }
.et-out   { color: #b0b8cc; padding-left: .5rem; border-left: 2px solid var(--border); margin: .2rem 0 .5rem; }
.et-row   { display: flex; align-items: center; border-top: 1px solid var(--border); padding: .5rem 1rem; background: rgba(124,106,247,.04); flex-shrink: 0; }
.et-inp   { flex: 1; background: transparent; border: none; outline: none; color: var(--text); font-family: var(--mono); font-size: .78rem; caret-color: var(--accent2); }
.tc-k     { color: var(--accent2); font-style: normal; }
.tc-dir   { color: var(--accent); }
.tc-c     { color: var(--muted); font-style: italic; }
kbd       { background: var(--bg3); border: 1px solid var(--border); border-radius: 4px; padding: .1rem .35rem; font-size: .7rem; }

/* Egg 3 — Konami */
.easter-konami {
  position: fixed; inset: 0; z-index: 9998;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none; animation: ee-in .2s ease;
}
.easter-konami.ek-out { animation: ee-out .5s ease forwards; }
.ek-inner { text-align: center; animation: ee-pop .4s cubic-bezier(.175,.885,.32,1.275); }
.ek-seq   { font-family: var(--mono); font-size: 1.4rem; font-weight: 700; color: var(--accent); letter-spacing: .15em; margin-bottom: .75rem; text-shadow: 0 0 30px var(--accent); }
.ek-prize {
  font-size: 2.8rem; font-weight: 900; font-family: var(--mono);
  background: linear-gradient(135deg, var(--gold), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: .75rem;
}
.ek-egg { font-family: var(--mono); font-size: .9rem; color: var(--accent2); margin-bottom: .5rem; }
.ek-msg { color: var(--text); font-size: 1rem; }

/* Confetti */
.conf-piece { position: fixed; top: -12px; z-index: 9997; animation: conf-fall linear forwards; }
@keyframes conf-fall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(105vh) rotate(720deg); opacity: 0; }
}

/* Egg 5 — Toast */
.easter-toast {
  position: fixed; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  z-index: 9999; background: var(--bg3);
  border: 1px solid rgba(124,106,247,.45); border-radius: 12px;
  padding: .85rem 1.6rem; font-family: var(--mono); font-size: .82rem;
  color: var(--accent2); text-align: center; box-shadow: var(--shadow);
  animation: ee-up .25s ease; max-width: min(400px, 90vw); pointer-events: none;
}
.toast-out { animation: ee-out .5s ease forwards; }

/* Footer hint */
.footer-eggs {
  font-family: var(--mono); font-size: .72rem;
  color: rgba(124,106,247,.4); margin-top: .5rem;
  transition: color .3s; cursor: default;
}
.footer-eggs:hover { color: var(--accent); }

/* Bonus: Minesweeper 💣 */
.ms-overlay {
  position: fixed; inset: 0; z-index: 9600;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.55); backdrop-filter: blur(4px);
  animation: ee-in .2s ease;
}
.ms-win {
  background: #c0c0c0;
  border: 3px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  box-shadow: 4px 4px 0 #000, inset 1px 1px 0 #dfdfdf;
  font-family: 'Arial', sans-serif;
  user-select: none;
  max-width: 95vw;
  overflow: hidden;
}
.ms-tbar {
  background: linear-gradient(90deg, #000080, #1084d0);
  padding: .28rem .5rem .28rem .45rem;
  display: flex; align-items: center; justify-content: space-between;
  color: #fff; font-size: .8rem; font-weight: 700; gap: .5rem;
}
.ms-ttitle { display: flex; align-items: center; gap: .4rem; }
.ms-tclose {
  background: #c0c0c0; color: #000;
  border: 2px solid; border-color: #fff #808080 #808080 #fff;
  font-size: .75rem; font-weight: 900; font-family: Arial, sans-serif;
  padding: 0 .4rem; line-height: 1.35; cursor: pointer; flex-shrink: 0;
}
.ms-tclose:active { border-color: #808080 #fff #fff #808080; }

.ms-diffs {
  display: flex; background: #c0c0c0;
  border-bottom: 2px solid; border-color: #808080 #fff #fff #808080;
  padding: .3rem .4rem; gap: .25rem;
}
.ms-diff {
  flex: 1; background: #c0c0c0; color: #000;
  border: 2px solid; border-color: #fff #808080 #808080 #fff;
  font-size: .7rem; font-family: Arial, sans-serif; font-weight: 700;
  padding: .25rem .4rem; cursor: pointer; text-align: center; line-height: 1.4;
}
.ms-diff span { font-size: .62rem; font-weight: 400; display: block; color: #444; }
.ms-diff:active, .ms-diff-on {
  border-color: #808080 #fff #fff #808080 !important;
  background: #b0b0b0 !important;
}
.ms-diff-on { box-shadow: inset 1px 1px 2px rgba(0,0,0,.2); }

.ms-panel {
  display: flex; align-items: center; justify-content: space-between;
  padding: .45rem .6rem;
  border: 2px solid; border-color: #808080 #fff #fff #808080;
  margin: .4rem;
}
.ms-lcd {
  font-family: 'Courier New', monospace; font-size: 1.5rem; font-weight: 700;
  color: #ff0000; background: #000;
  padding: .05rem .35rem;
  border: 2px solid; border-color: #808080 #fff #fff #808080;
  min-width: 3rem; text-align: right; letter-spacing: .05em;
  line-height: 1.2;
}
.ms-face {
  background: #c0c0c0; font-size: 1.25rem; line-height: 1;
  border: 3px solid; border-color: #fff #808080 #808080 #fff;
  padding: .2rem .35rem; cursor: pointer;
}
.ms-face:active { border-color: #808080 #fff #fff #808080; padding: .25rem .3rem .15rem .4rem; }

.ms-grid {
  display: grid;
  gap: 0; padding: .4rem;
  border: 3px solid; border-color: #808080 #fff #fff #808080;
  margin: 0 .4rem .4rem;
  overflow-x: auto;
}
.ms-cell {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 900; cursor: pointer;
  border: 2px solid;
}
.ms-hidden {
  background: #c0c0c0;
  border-color: #fff #808080 #808080 #fff;
}
.ms-hidden:hover:not(:has(~.ms-over)) { background: #d0d0d0; }
.ms-hidden:active { background: #b0b0b0; border-color: #808080; border-width: 1px; }
.ms-open {
  background: #bdbdbd; border: 1px solid #808080; cursor: default;
  font-family: 'Arial Black', sans-serif;
}
.ms-boom { background: #ff0000; border: 1px solid #808080; cursor: default; }
.ms-info {
  font-size: .62rem; color: #606060; text-align: center;
  padding: .2rem .5rem .45rem; font-family: monospace;
}

/* Shared animations */
@keyframes ee-in  { from { opacity: 0; } to { opacity: 1; } }
@keyframes ee-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes ee-up  { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes ee-pop {
  0%   { transform: scale(0) rotate(-10deg); opacity: 0; }
  65%  { transform: scale(1.12) rotate(2deg); opacity: 1; }
  100% { transform: scale(1)    rotate(0deg); }
}