/* ============================================================
   Ian Foote — Personal Site
   Design language: "Midnight & Slate" (dark dev-portfolio)
   Palette : Deep Navy #0A192F · Slate #8892B0 · Off-white #E6F1FF
             Emerald accent #64FFDA
   Zero dependencies. System font stack (Inter if present).
   ============================================================ */

:root {
  --navy:        #0A192F;
  --navy-2:      #0d2140;
  --navy-card:   #112240;
  --navy-card-2: #1c2c4c;
  --slate:       #8892B0;
  --light-slate: #a8b2d1;
  --white:       #E6F1FF;
  --accent:      #64FFDA;
  --accent-dim:  rgba(100, 255, 218, 0.15);
  --accent-glow: rgba(100, 255, 218, 0.35);

  --max-w: 1080px;
  --radius: 12px;
  --ease: cubic-bezier(0.645, 0.045, 0.355, 1);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas,
               'Liberation Mono', Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--navy);
  color: var(--light-slate);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* subtle ambient grid + glow background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px circle at 80% -10%, rgba(100,255,218,0.08), transparent 55%),
    radial-gradient(700px circle at 0% 100%, rgba(56,120,255,0.07), transparent 50%),
    linear-gradient(180deg, #0A192F 0%, #08152b 100%);
}

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

section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: inline-block;
}

.section-title {
  color: var(--white);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 36px;
  position: relative;
}
.section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 14px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 14px var(--accent-glow);
}

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(10, 25, 47, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(136,146,176,0.12);
  transition: padding 0.3s var(--ease);
}
.nav.scrolled { padding: 10px 32px; }
.nav__brand {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}
.nav__links { display: flex; gap: 26px; list-style: none; }
.nav__links a {
  color: var(--slate);
  font-size: 0.9rem;
  font-family: var(--font-mono);
  position: relative;
  transition: color 0.25s var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute; left: 0; bottom: -6px;
  width: 0; height: 2px; background: var(--accent);
  transition: width 0.25s var(--ease);
}
.nav__links a:hover, .nav__links a.active { color: var(--accent); }
.nav__links a:hover::after, .nav__links a.active::after { width: 100%; }

.nav__toggle {
  display: none; background: none; border: none; cursor: pointer;
  color: var(--accent); font-size: 1.5rem;
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 120px 24px 60px;
}
.hero__hi { font-family: var(--font-mono); color: var(--accent); font-size: 1.1rem; }
.hero__name {
  color: var(--white);
  font-size: clamp(2.6rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 10px 0;
}
.hero__role {
  color: var(--slate);
  font-size: clamp(1.4rem, 4.5vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.hero__role .typed {
  color: var(--accent);
  font-family: var(--font-mono);
  border-right: 2px solid var(--accent);
  padding-right: 3px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { border-color: transparent; } }
.hero__blurb {
  max-width: 560px;
  margin: 26px 0 36px;
  color: var(--slate);
  font-size: 1.08rem;
}
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  padding: 13px 26px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
              box-shadow 0.2s var(--ease), color 0.2s var(--ease);
  border: 1px solid var(--accent);
}
.btn--primary { background: var(--accent-dim); color: var(--accent); }
.btn--primary:hover {
  background: var(--accent);
  color: var(--navy);
  box-shadow: 0 8px 30px var(--accent-glow);
  transform: translateY(-2px);
}
.btn--ghost { background: transparent; color: var(--light-slate); border-color: rgba(136,146,176,0.4); }
.btn--ghost:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- ABOUT ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}
.about__text p { margin-bottom: 18px; color: var(--slate); font-size: 1.02rem; }
.about__text strong { color: var(--white); font-weight: 600; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stat {
  background: var(--navy-card);
  border: 1px solid rgba(136,146,176,0.14);
  border-radius: var(--radius);
  padding: 22px 18px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}
.stat:hover { transform: translateY(-4px); border-color: var(--accent); }
.stat__num {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--accent);
}
.stat__label { font-size: 0.82rem; color: var(--slate); margin-top: 4px; }

/* ---------- COMPETENCIES ---------- */
.section-lead { max-width: 640px; color: var(--slate); font-size: 1.02rem; margin-bottom: 30px; }
/* Systems section: tidy 2x2 for its 4 cards (auto-fit leaves a gap otherwise) */
#systems .skills-grid { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 640px) { #systems .skills-grid { grid-template-columns: 1fr; } }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.skill-card {
  background: var(--navy-card);
  border: 1px solid rgba(136,146,176,0.14);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
              box-shadow 0.25s var(--ease);
}
.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 14px 40px rgba(2,12,27,0.6);
}
.skill-card__icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: inline-block;
}
.skill-card h3 { color: var(--white); font-size: 1.15rem; margin-bottom: 12px; }
.skill-card ul { list-style: none; }
.skill-card li {
  color: var(--slate);
  font-size: 0.92rem;
  padding: 4px 0 4px 18px;
  position: relative;
}
.skill-card li::before {
  content: "▹";
  color: var(--accent);
  position: absolute;
  left: 0;
}

/* ---------- TIMELINE ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute; left: 9px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(100,255,218,0.1));
}
.tl-item { position: relative; padding-bottom: 42px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute; left: -31px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--navy); border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(100,255,218,0.1);
}
.tl-item__role { color: var(--white); font-weight: 700; font-size: 1.15rem; }
.tl-item__role span { color: var(--accent); }
.tl-item__meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--slate);
  margin: 4px 0 12px;
}
.tl-item__desc { color: var(--slate); font-size: 0.96rem; }
.tl-item__desc li { margin: 6px 0 6px 18px; position: relative; }
.tl-item__desc li::before { content: "•"; color: var(--accent); position: absolute; left: -16px; }

/* ---------- HIGHLIGHTS ---------- */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
@media (max-width: 1000px) { .highlights-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px)  { .highlights-grid { grid-template-columns: repeat(2, 1fr); } }
.hl-card {
  background: linear-gradient(160deg, var(--navy-card), var(--navy-card-2));
  border: 1px solid rgba(136,146,176,0.14);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.hl-card:hover { transform: translateY(-6px); box-shadow: 0 16px 44px rgba(2,12,27,0.6); }
.hl-card__big {
  font-family: var(--font-mono);
  font-size: 2.4rem; font-weight: 800;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 22px var(--accent-glow);
}
.hl-card h3 { color: var(--white); font-size: 1.1rem; margin: 14px 0 8px; }
.hl-card p { color: var(--slate); font-size: 0.92rem; }

/* ---------- CONTACT ---------- */
.contact { text-align: center; }
.contact__lead { max-width: 560px; margin: 0 auto 30px; color: var(--slate); font-size: 1.1rem; }
.contact__mail {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: clamp(1.2rem, 4vw, 2rem);
  border-bottom: 2px solid transparent;
  transition: border-color 0.25s var(--ease);
}
.contact__mail:hover { border-color: var(--accent); }
.socials { display: flex; gap: 22px; justify-content: center; margin-top: 34px; }
.socials a {
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}
.socials a:hover { color: var(--accent); transform: translateY(-3px); }

/* ---------- FOOTER ---------- */
.footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid rgba(136,146,176,0.12);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ---------- reveal animation ----------
   Progressive enhancement: content is only hidden when JS is present
   (html.js). If JS is blocked/slow, everything stays visible. */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
/* safety net: if the observer never fires, force-show after JS boots */
.js .reveal { opacity: 0; }
.js.ready .reveal { opacity: 1 !important; transform: none !important; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .nav__links {
    position: fixed;
    top: 58px; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10,25,47,0.97);
    backdrop-filter: blur(12px);
    width: 220px;
    padding: 10px 0;
    border-left: 1px solid rgba(136,146,176,0.14);
    border-bottom: 1px solid rgba(136,146,176,0.14);
    transform: translateX(110%);
    transition: transform 0.3s var(--ease);
  }
  .nav__links.open { transform: translateX(0); }
  .nav__links a { padding: 12px 24px; display: block; }
  .nav__toggle { display: block; }
  .about__grid { grid-template-columns: 1fr; gap: 32px; }
  section { padding: 72px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}