/* ================================
   이민섭 포트폴리오
   Palette: mist / ink / pine / amber
   Type: IBM Plex Sans KR + IBM Plex Mono
   ================================ */

:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --ink: #182229;
  --muted: #5d6e76;
  --line: #dee5e3;
  --accent: #0e7a5f;
  --accent-soft: #e1f1ea;
  --amber: #a06d0b;
  --amber-soft: #f7ecd8;
  --radius: 14px;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

.nav-dot { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--ink); }
.nav-links .nav-github { color: var(--accent); font-weight: 500; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 56px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5.4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
  background: linear-gradient(transparent 68%, var(--accent-soft) 68%);
}

.hero-copy {
  margin-top: 24px;
  font-size: 1.06rem;
  color: var(--muted);
  max-width: 56ch;
}

.hero-actions { margin-top: 36px; display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 11px 22px;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  background: var(--surface);
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 0 var(--ink); }

.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { box-shadow: 0 4px 0 var(--accent); }

/* ---------- Skills strip ---------- */
.skills { padding: 8px 0 24px; border-top: 1px solid var(--line); }

.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding-top: 20px;
}

.skills-list li {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
}

/* ---------- Sections ---------- */
.section { padding: 72px 0 8px; }

.section h2 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.section-no {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--accent);
}

.section-lead { color: var(--muted); margin-top: 8px; }

/* ---------- Projects ---------- */
.project-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.project {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.project:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 28px -14px rgba(24, 34, 41, 0.25);
}

.project.featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--surface) 55%, var(--accent-soft));
}

.project-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.project h3 { font-size: 1.18rem; font-weight: 700; }

.project p { color: var(--muted); font-size: 0.95rem; flex: 1; }
.project p strong { color: var(--ink); font-weight: 500; }

.badge {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.badge-award { background: var(--amber-soft); color: var(--amber); }

.stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stack li {
  font-family: var(--mono);
  font-size: 0.73rem;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: var(--bg);
}

.project-links { display: flex; gap: 16px; font-size: 0.88rem; }

.project-links a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}

.project-links a:hover { text-decoration: underline; }

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  margin-top: 32px;
  border-left: 2px solid var(--line);
  padding-left: 28px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.timeline li { position: relative; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2.5px solid var(--bg);
}

.timeline-when {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.timeline-body h3 { font-size: 1.05rem; margin-top: 2px; }
.timeline-body p { color: var(--muted); font-size: 0.92rem; }

/* ---------- Contact ---------- */
.contact { padding-bottom: 40px; }
.contact-copy { color: var(--muted); margin-top: 10px; }
.contact-links { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer {
  margin-top: 60px;
  padding: 28px 24px 120px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- 마스코트 ---------- */
.mascot {
  position: fixed;
  right: 18px;
  bottom: 0;
  z-index: 40;
  line-height: 0;
  pointer-events: none;
  user-select: none;
}

.mascot svg { overflow: visible; }

.mascot-bubble {
  position: absolute;
  right: 90%;
  bottom: 82%;
  white-space: nowrap;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 8px 14px;
  border-radius: 12px 12px 2px 12px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s, transform 0.3s;
}

.mascot-bubble.show { opacity: 1; transform: translateY(0); }

/* 눈 깜빡임 */
@keyframes blink {
  0%, 94%, 100% { transform: scaleY(1); }
  96%, 98% { transform: scaleY(0.08); }
}

.eye {
  animation: blink 4.6s infinite;
  transform-origin: center;
  transform-box: fill-box;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .eye { animation: none; }
  .project, .btn { transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .project-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 64px; }
  .br-wide { display: none; }
  .nav { padding: 14px 18px; }
  .nav-links { gap: 14px; font-size: 0.85rem; }
  .mascot svg { width: 120px; height: auto; }
  .footer { padding-bottom: 140px; }
}