/* ============================================================
   fr4med.is-a.dev — styles
   ============================================================ */

:root {
  --bg: #0d1117;
  --bg-elevated: #131a23;
  --bg-card: #161e28;
  --border: #223041;
  --text: #dbe4ee;
  --text-muted: #8b98a9;
  --accent: #58f0a6;
  --accent-dim: rgba(88, 240, 166, 0.12);
  --accent-glow: rgba(88, 240, 166, 0.35);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 12px;
  --header-h: 68px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

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

.container { width: min(1100px, 92%); margin-inline: auto; }

::selection { background: var(--accent); color: #06251a; }

/* ---------- background layers ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(139, 152, 169, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 152, 169, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
}

.bg-glow {
  position: fixed; z-index: -1;
  top: -220px; left: 50%; transform: translateX(-50%);
  width: 720px; height: 480px;
  background: radial-gradient(closest-side, rgba(88, 240, 166, 0.09), transparent);
  pointer-events: none;
}

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(13, 17, 23, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.logo {
  font-family: var(--mono); font-size: 1.15rem; font-weight: 700;
  color: var(--text); text-decoration: none; letter-spacing: -0.02em;
}
.logo-bracket { color: var(--text-muted); }
.logo-accent { color: var(--accent); }
.logo:hover .logo-bracket { color: var(--accent); }

.nav-links {
  display: flex; align-items: center; gap: 1.9rem; list-style: none;
}
.nav-links a:not(.btn) {
  color: var(--text); text-decoration: none; font-size: 0.92rem; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:not(.btn):hover { color: var(--accent); }
.nav-num { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); margin-right: 2px; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; margin: 5px 0;
  background: var(--text); border-radius: 2px; transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  font-size: 0.95rem; padding: 0.8rem 1.6rem; border-radius: 8px;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent); color: #06251a;
  box-shadow: 0 0 0 rgba(88, 240, 166, 0);
}
.btn-primary:hover { box-shadow: 0 6px 24px var(--accent-glow); transform: translateY(-2px); }
.btn-outline {
  color: var(--accent); border: 1px solid var(--accent); background: transparent;
}
.btn-outline:hover { background: var(--accent-dim); transform: translateY(-2px); }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.85rem; }
.btn-lg { padding: 1rem 2.2rem; font-size: 1.05rem; }

/* ---------- hero ---------- */
.hero {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: var(--header-h);
}
.hero-kicker {
  font-family: var(--mono); color: var(--accent);
  font-size: 1rem; margin-bottom: 1.1rem;
}
.hero-title {
  font-size: clamp(2.8rem, 8vw, 5.2rem); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.05;
}
.cursor-dot { color: var(--accent); }
.hero-subtitle {
  font-size: clamp(1.5rem, 4.5vw, 2.6rem); font-weight: 700;
  color: var(--text-muted); letter-spacing: -0.02em; margin-top: 0.4rem;
  min-height: 1.3em;
}
.typed-caret {
  display: inline-block; width: 3px; height: 0.95em;
  background: var(--accent); margin-left: 6px; vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  max-width: 560px; color: var(--text-muted);
  margin-top: 1.4rem; font-size: 1.08rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.2rem; }

/* terminal */
.hero-terminal {
  margin-top: 3.5rem; max-width: 640px;
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}
.terminal-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 10px 14px; background: #0b0f14; border-bottom: 1px solid var(--border);
}
.t-dot { width: 11px; height: 11px; border-radius: 50%; }
.t-dot.red { background: #ff5f57; } .t-dot.yellow { background: #febc2e; } .t-dot.green { background: #28c840; }
.terminal-title {
  margin-left: 8px; font-family: var(--mono);
  font-size: 0.75rem; color: var(--text-muted);
}
.terminal-body {
  padding: 16px 18px; font-family: var(--mono);
  font-size: 0.88rem; line-height: 1.9; overflow-x: auto;
}
.t-prompt { color: var(--accent); }
.t-out { color: var(--text-muted); }
.t-blink { animation: blink 1s steps(1) infinite; color: var(--accent); }

/* ---------- sections ---------- */
.section { padding: 6.5rem 0; }
.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2rem); font-weight: 700;
  letter-spacing: -0.02em; display: flex; align-items: center; gap: 0.7rem;
  margin-bottom: 2.6rem;
}
.section-num { font-family: var(--mono); color: var(--accent); font-size: 0.85em; font-weight: 500; }
.section-title::after {
  content: ""; flex: 1; max-width: 280px; height: 1px; background: var(--border); margin-left: 0.6rem;
}
.section-lede { color: var(--text-muted); margin: -1.4rem 0 2.4rem; }

/* ---------- about ---------- */
.about-grid {
  display: grid; grid-template-columns: 3fr 2fr; gap: 3.5rem; align-items: start;
}
.about-text p { color: var(--text-muted); margin-bottom: 1.1rem; }
.about-text strong { color: var(--text); }
.about-list {
  list-style: none; display: grid; grid-template-columns: repeat(2, minmax(140px, 1fr));
  gap: 0.55rem 1rem; margin-top: 0.5rem;
}
.about-list li {
  font-family: var(--mono); font-size: 0.86rem; color: var(--text-muted);
  padding-left: 1.2rem; position: relative;
}
.about-list li::before {
  content: "▸"; position: absolute; left: 0; color: var(--accent);
}

.code-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.35);
  transition: transform 0.25s, border-color 0.25s;
}
.code-card:hover { transform: translateY(-4px); border-color: rgba(88, 240, 166, 0.4); }
.code-card-header {
  padding: 10px 16px; font-family: var(--mono); font-size: 0.78rem;
  color: var(--text-muted); background: #0b0f14; border-bottom: 1px solid var(--border);
}
.code-card pre {
  padding: 18px; font-family: var(--mono); font-size: 0.85rem;
  line-height: 1.8; overflow-x: auto;
}
.c-kw { color: #c792ea; } .c-var { color: #82aaff; } .c-key { color: #dbe4ee; }
.c-str { color: var(--accent); } .c-bool { color: #f78c6c; }

/* ---------- skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.skill-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.8rem;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.skill-card:hover {
  transform: translateY(-6px); border-color: rgba(88, 240, 166, 0.4);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
}
.skill-icon { font-size: 1.7rem; margin-bottom: 0.9rem; }
.skill-card h3 { font-size: 1.15rem; margin-bottom: 0.6rem; letter-spacing: -0.01em; }
.skill-card p { color: var(--text-muted); font-size: 0.93rem; margin-bottom: 1.1rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags span {
  font-family: var(--mono); font-size: 0.72rem; color: var(--accent);
  background: var(--accent-dim); padding: 0.28rem 0.65rem; border-radius: 99px;
}

/* ---------- projects ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.8rem;
  display: flex; flex-direction: column;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.project-card:hover {
  transform: translateY(-6px); border-color: rgba(88, 240, 166, 0.4);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
}
.project-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.1rem; }
.folder-icon { font-size: 1.6rem; }
.project-link {
  color: var(--text-muted); text-decoration: none; font-size: 1.25rem;
  transition: color 0.2s, transform 0.2s;
}
.project-link:hover { color: var(--accent); transform: translate(2px, -2px); }
.project-card h3 { font-size: 1.15rem; margin-bottom: 0.55rem; letter-spacing: -0.01em; }
.project-card p { color: var(--text-muted); font-size: 0.93rem; flex: 1; margin-bottom: 1.2rem; }

/* ---------- contact ---------- */
.section-contact { text-align: center; padding-bottom: 8rem; }
.section-contact .section-title { justify-content: center; }
.section-contact .section-title::after { display: none; }
.contact-lede {
  color: var(--text-muted); max-width: 520px; margin: 0 auto 2.4rem; font-size: 1.06rem;
}
.contact-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border); padding: 1.6rem 0; text-align: center;
  font-family: var(--mono); font-size: 0.8rem; color: var(--text-muted);
}
.site-footer strong { color: var(--accent); font-weight: 500; }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .typed-caret, .t-blink { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.4rem; }
  .skills-grid, .projects-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .skills-grid, .projects-grid { grid-template-columns: 1fr; }
  .section { padding: 4.5rem 0; }

  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-elevated); border-bottom: 1px solid var(--border);
    padding: 0.6rem 1.4rem 1.2rem;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links li { width: 100%; }
  .nav-links a:not(.btn) { display: block; padding: 0.85rem 0; }
  .nav-links .btn { margin-top: 0.8rem; }
}