/* =============================================
   DIEGO CRUZ — PERSONAL SITE
   style.css
   Dark minimal · terminal-inspired aesthetic
   ============================================= */

/* ─── CSS Variables ─────────────────────────── */
:root {
  /* Colours */
  --bg:         #0c0c0e;
  --bg-surface: #111115;
  --bg-card:    #15151a;
  --bg-card-hover: #1c1c24;
  --border:     #222230;
  --border-light: #2e2e42;

  --text:       #e8e8f0;
  --text-muted: #7a7a96;
  --text-dim:   #4a4a62;

  --accent:     #7fffb5;      /* sharp mint green — the one punchy colour */
  --accent-dim: #3fff8480;
  --accent-soft:#7fffb520;

  --red:    #ff6b6b;
  --yellow: #ffd166;
  --blue:   #74b9ff;

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  /* Spacing */
  --section-pad: 7rem 1.5rem;
  --max-w: 1060px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
}

/* ─── Reset ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* ─── Fade-in animations ─────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 0.7s var(--ease) forwards;
  animation-delay: var(--delay, 0s);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes fadeUp {
  to { opacity: 1; transform: none; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ─── NAV ─────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, backdrop-filter 0.3s;
}
.nav.scrolled {
  border-color: var(--border);
  backdrop-filter: blur(12px);
  background: rgba(12, 12, 14, 0.85);
}
.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-right: auto;
  transition: opacity 0.2s;
}
.nav__logo:hover { opacity: 0.7; }

.nav__links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav__links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--text); }

.nav__cta {
  color: var(--accent) !important;
  border: 1px solid var(--accent-dim);
  padding: 0.35rem 0.85rem;
  border-radius: 3px;
  transition: background 0.2s, color 0.2s !important;
}
.nav__cta:hover { background: var(--accent-soft); }

/* Mobile burger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-muted);
  transition: transform 0.3s, opacity 0.3s;
}

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s var(--ease);
}
.nav__mobile.open { max-height: 300px; }
.nav__mobile a {
  display: block;
  padding: 0.85rem 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, background 0.2s;
}
.nav__mobile a:hover { color: var(--text); background: var(--bg-surface); }

@media (max-width: 680px) {
  .nav__links  { display: none; }
  .nav__burger { display: flex; }
  .nav__mobile { display: flex; }
}

/* ─── HERO ────────────────────────────────────── */
.hero {
  min-height: 100vh;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr;
  align-items: center;
  gap: 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: 8rem;
  padding-bottom: 4rem;
  position: relative;
}

/* Decorative vertical grid lines */
.hero__grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  display: flex;
  justify-content: space-evenly;
  z-index: 0;
  opacity: 0.025;
}
.hero__grid span {
  display: block;
  width: 1px;
  height: 100%;
  background: var(--text);
}

.hero__content { position: relative; z-index: 1; }

.hero__eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.hero__name {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 1.4rem;
}

.hero__tagline {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  font-style: italic;
}

.hero__intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 46ch;
  line-height: 1.85;
  margin-bottom: 2.2rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.65rem 1.4rem;
  border-radius: 3px;
  transition: all 0.2s var(--ease-out);
}
.btn--primary {
  background: var(--accent);
  color: var(--bg);
  font-weight: 500;
}
.btn--primary:hover { filter: brightness(1.1); transform: translateY(-1px); }

.btn--ghost {
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}
.btn--ghost:hover { border-color: var(--text-muted); color: var(--text); transform: translateY(-1px); }

/* ─── Terminal ────────────────────────────────── */
.hero__terminal {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.7),
              0 0 0 1px rgba(255,255,255,0.03);
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }

.terminal__title {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: auto;
  letter-spacing: 0.05em;
}

.terminal__body {
  padding: 1.4rem 1.2rem;
  font-size: 0.82rem;
  line-height: 1.9;
}
.t-prompt { color: var(--accent); margin-right: 0.5em; }
.t-cmd    { color: var(--text); }
.t-out    { color: var(--text-muted); padding-left: 1.5em; }
.t-dim    { color: var(--text-dim); }
.t-badge  {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  padding: 0.1em 0.5em;
  border-radius: 3px;
  margin-left: 0.5em;
  border: 1px solid var(--accent-dim);
}
.t-cursor {
  color: var(--accent);
  animation: blink 1.2s step-end infinite;
}

/* ─── Section shared ──────────────────────────── */
.section {
  padding: var(--section-pad);
  position: relative;
}

.section__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section__label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.section__heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 1.2rem;
}

.section__sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 52ch;
  margin-bottom: 3rem;
}

/* ─── About ───────────────────────────────────── */
.about { background: var(--bg-surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-top: 2rem;
}

.about__text p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.85;
}
.about__text p:last-child { margin-bottom: 0; }

.tag-group { margin-bottom: 1.4rem; }
.tag-group__label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-size: 0.78rem;
  padding: 0.3em 0.75em;
  border: 1px solid var(--border-light);
  border-radius: 3px;
  color: var(--text-muted);
  transition: border-color 0.2s, color 0.2s;
}
.tag:hover { border-color: var(--accent-dim); color: var(--accent); }

/* ─── Labs cards ──────────────────────────────── */
.labs { background: var(--bg); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.25s, background 0.25s, transform 0.25s var(--ease);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-3px);
}
.card:hover::before { opacity: 1; }

.card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.card__date {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}
.card__status {
  font-size: 0.7rem;
  padding: 0.15em 0.6em;
  border-radius: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.card__status--active { background: rgba(127, 255, 181, 0.1); color: var(--accent); border: 1px solid var(--accent-dim); }
.card__status--queued { background: rgba(116,185,255,0.1);    color: var(--blue);   border: 1px solid rgba(116,185,255,0.3); }
.card__status--done   { background: rgba(122,122,150,0.1);    color: var(--text-dim); border: 1px solid var(--border); }

.card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.card__desc {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.card__type {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.card__link {
  font-size: 0.78rem;
  color: var(--accent);
  transition: opacity 0.2s;
}
.card__link:hover { opacity: 0.7; }

/* ─── Thoughts ────────────────────────────────── */
.thoughts {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
}

.posts { display: flex; flex-direction: column; gap: 0; }

.post {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 10rem 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 2rem;
  row-gap: 0.4rem;
  align-items: start;
  transition: background 0.2s;
}
.post:first-child { border-top: 1px solid var(--border); }

.post__meta { grid-column: 1; grid-row: 1 / 3; padding-top: 0.1rem; }
.post__date {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}
.post__title {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  transition: color 0.2s;
  line-height: 1.3;
}
.post:hover .post__title { color: var(--accent); }
.post__excerpt {
  grid-column: 2;
  grid-row: 2;
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.post__tag {
  grid-column: 3;
  grid-row: 1;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.25em 0.7em;
  border-radius: 3px;
  white-space: nowrap;
}

.thoughts__cta {
  margin-top: 2.5rem;
  padding: 1.2rem;
  border: 1px dashed var(--border-light);
  border-radius: 4px;
  text-align: center;
}
.thoughts__cta-text {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ─── Footer ──────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-right: auto;
}
.footer__links {
  display: flex;
  gap: 1.5rem;
}
.footer__links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  transition: color 0.2s;
}
.footer__links a:hover { color: var(--accent); }
.footer__copy {
  width: 100%;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ─── Back to top ─────────────────────────────── */
.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, color 0.2s;
  transform: translateY(8px);
  z-index: 90;
}
.back-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}
.back-top:hover { color: var(--accent); border-color: var(--accent-dim); }

/* ─── Accent colour helper ────────────────────── */
.accent { color: var(--accent); }

/* ─── Responsive ──────────────────────────────── */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 6rem;
    min-height: auto;
    gap: 3rem;
  }
  .hero__terminal { max-width: 480px; }

  .about__grid { grid-template-columns: 1fr; gap: 2.5rem; }

  .post {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    row-gap: 0.5rem;
  }
  .post__meta  { grid-column: 1; grid-row: 1; }
  .post__title { grid-column: 1; grid-row: 2; }
  .post__excerpt { grid-column: 1; grid-row: 3; }
  .post__tag   { grid-column: 1; grid-row: 4; justify-self: start; }
}

@media (max-width: 520px) {
  :root { --section-pad: 4.5rem 1.2rem; }
  .hero__name { font-size: 3rem; }
  .cards { grid-template-columns: 1fr; }
  .back-top { bottom: 1.2rem; right: 1.2rem; }
}