/* ─────────────────────────────────────────────────────────────
   Joseph Lang — Python Developer Portfolio
   Green accent theme
   ──────────────────────────────────────────────────────────── */

:root {
  --bg:          #060d09;
  --bg-alt:      #090f0b;
  --surface:     #0e1710;
  --card:        #121d14;
  --card-hover:  #192619;
  --border:      #1a2e1d;

  --accent:      #22c55e;
  --accent-dim:  #16a34a;
  --accent-glow: rgba(34, 197, 94, 0.12);

  --text:        #e4f0e7;
  --text-muted:  #7ea88a;
  --text-faint:  #304035;

  --radius:      0.75rem;
  --radius-sm:   0.375rem;
  --transition:  0.2s ease;
  --font-sans:   system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono:   "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
ul { list-style: none; }
a  { color: inherit; text-decoration: none; }

.container {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
}

.section { padding-block: 6rem; }
.section--alt { background: var(--bg-alt); }

.section__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section__heading {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 3rem;
  line-height: 1.2;
}

/* ── Nav ──────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 13, 9, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}
.nav__brand {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav__brand:hover { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.nav__links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}
.nav__links a::after {
  content: "";
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }

.nav__divider { color: var(--text-faint); font-size: 0.75rem; }

.nav__sib { font-size: 0.8rem; color: var(--text-faint); }
.nav__sib:hover { color: var(--text-muted); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: var(--bg);
}
.btn--primary:hover { background: var(--accent-dim); transform: translateY(-1px); }
.btn--outline {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn--outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 55% at 45% 45%, rgba(34,197,94,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.hero__content {
  position: relative;
  padding-block: 8rem 6rem;
  max-width: 680px;
}
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.hero__name {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__title {
  font-size: clamp(0.95rem, 2vw, 1.25rem);
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero__subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero__scroll-hint { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); }
.hero__scroll-hint span {
  display: block; width: 1px; height: 60px;
  background: linear-gradient(to bottom, transparent, var(--accent));
  animation: scroll-line 2s ease-in-out infinite;
}
@keyframes scroll-line {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── About ────────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about__text p { color: var(--text-muted); margin-bottom: 1.25rem; font-size: 1rem; }
.about__highlights { margin-top: 1.75rem; display: flex; flex-direction: column; gap: 0.75rem; }
.about__highlights li { display: flex; gap: 0.75rem; align-items: flex-start; font-size: 0.925rem; color: var(--text); }
.hl { color: var(--accent); font-size: 0.6rem; flex-shrink: 0; margin-top: 0.45rem; }
.about__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.stat-card__value { font-family: var(--font-mono); font-size: 1.8rem; font-weight: 700; color: var(--accent); line-height: 1; margin-bottom: 0.5rem; }
.stat-card__label { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }

/* ── Skills ───────────────────────────────────────────────── */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 0;
}
.skill-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: all var(--transition);
}
.skill-card:hover { border-color: var(--accent); background: var(--card-hover); transform: translateY(-3px); }
.skill-card__icon { font-size: 1.75rem; color: var(--accent); line-height: 1; }
.skill-card__title { font-size: 1.15rem; font-weight: 700; color: var(--text); }
.skill-card__body { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; flex: 1; }
.skill-card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; }
.skill-card__tags li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  background: rgba(34,197,94,0.07);
  border: 1px solid rgba(34,197,94,0.2);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.55rem;
}

/* ── Stack ────────────────────────────────────────────────── */
.stack__section { margin-top: 5rem; }
.stack__categories {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
}
.stack__category-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.stack__items { display: flex; flex-direction: column; gap: 0.4rem; }
.stack__item {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  transition: all var(--transition);
}
.stack__item:hover { color: var(--text); border-color: var(--accent); padding-left: 1rem; }

/* ── Projects ─────────────────────────────────────────────── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: all var(--transition);
}
.project-card:hover { border-color: var(--accent); background: var(--card-hover); transform: translateY(-3px); }

/* Featured card spans full width */
.project-card--featured {
  grid-column: span 2;
  border-color: var(--accent);
  background: var(--card-hover);
  box-shadow: 0 0 0 1px rgba(34,197,94,0.15), 0 8px 40px rgba(34,197,94,0.08);
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.project-card__type {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(34,197,94,0.08);
  border: 1px solid rgba(34,197,94,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}
.project-card--featured .project-card__type {
  font-size: 0.75rem;
  background: rgba(34,197,94,0.12);
}
.project-card__private {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}
.project-card__link {
  font-size: 1.25rem;
  color: var(--text-faint);
  transition: color var(--transition);
}
.project-card__link:hover { color: var(--accent); }

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.project-card--featured .project-card__title { font-size: 1.3rem; }

.project-card__body { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }

.project-card__details { margin-top: 0.25rem; }
.project-card__details-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.project-card__detail-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 1.5rem;
  list-style: disc;
  padding-left: 1.1rem;
}
.project-card__detail-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}
.project-card__tags li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.5rem;
}
.project-card--featured .project-card__tags li {
  color: var(--accent);
  background: rgba(34,197,94,0.06);
  border-color: rgba(34,197,94,0.18);
}

.project-card--cta { border-style: dashed; }

/* ── Contact ──────────────────────────────────────────────── */
.contact__inner { text-align: center; max-width: 580px; margin-inline: auto; }
.contact__inner .section__heading { margin-bottom: 1rem; }
.contact__body { color: var(--text-muted); margin-bottom: 2.5rem; font-size: 1.05rem; }
.contact__links { display: flex; flex-direction: column; gap: 1rem; align-items: center; }
.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 2rem;
  width: 100%;
  max-width: 420px;
  justify-content: center;
  transition: all var(--transition);
}
.contact__link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ── Footer ───────────────────────────────────────────────── */
.footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding-block: 1.75rem; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; }
.footer p { font-size: 0.8rem; color: var(--text-faint); }
.footer__nav { display: flex; gap: 1.5rem; }
.footer__nav a { font-size: 0.8rem; color: var(--text-faint); font-family: var(--font-mono); transition: color var(--transition); }
.footer__nav a:hover { color: var(--text-muted); }

/* ── Focus ────────────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; gap: 3rem; }
  .skills__grid { grid-template-columns: 1fr; }
  .stack__categories { grid-template-columns: repeat(2, 1fr); }
  .project-card--featured { grid-column: span 1; }
  .project-card__detail-list { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav__links { gap: 1rem; font-size: 0.8rem; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }
  .projects__grid { grid-template-columns: 1fr; }
  .stack__categories { grid-template-columns: 1fr 1fr; }
  .about__stats { grid-template-columns: 1fr 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
}