/* Abel Briones — portfolio site */

:root {
  --bg: #0b0f14;
  --bg-alt: #11161d;
  --bg-card: #141b23;
  --border: #232c37;
  --text: #e9eef3;
  --text-dim: #9aa9b8;
  --text-dimmer: #6b7a8a;
  --accent: #3ddc97;
  --accent-dim: #2a9d6f;
  --accent-2: #5b9dfb;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  --radius: 14px;
  --maxw: 1120px;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f7f9fb;
  --bg-alt: #ffffff;
  --bg-card: #ffffff;
  --border: #e3e8ee;
  --text: #101820;
  --text-dim: #4b5866;
  --text-dimmer: #7c8896;
  --accent: #12946a;
  --accent-dim: #0d7a56;
  --accent-2: #2563eb;
  --shadow: 0 8px 30px rgba(20,30,40,0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; border-radius: 10px; }

a { color: inherit; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand .dot { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color .15s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 14px; }

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(700px 300px at 85% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
    radial-gradient(500px 260px at 5% 0%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 60%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
}
h1.headline {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.12;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
h1.headline .accent { color: var(--accent); }
.subhead {
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--text-dim);
  max-width: 62ch;
  margin: 0 0 32px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, opacity .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #04150e; }
.btn-primary:hover { opacity: 0.92; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-dimmer); }

/* ---------- Stat strip ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  background: var(--bg-card);
  padding: 22px 20px;
  text-align: left;
}
.stat .num {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.stat .lbl {
  color: var(--text-dim);
  font-size: 0.84rem;
  margin-top: 4px;
}

/* ---------- Section generic ---------- */
section { padding: 84px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }
.section-head { max-width: 720px; margin-bottom: 44px; }
.kicker {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
h2.section-title {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.section-desc { color: var(--text-dim); font-size: 1.02rem; }

/* ---------- Evolution ladder ---------- */
.ladder {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}
.rung {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-dim);
  text-align: center;
  position: relative;
}
.rung.now { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }

.narrative { color: var(--text-dim); font-size: 1.02rem; max-width: 74ch; }
.narrative p { margin: 0 0 16px; }
.narrative strong { color: var(--text); }

/* ---------- Methodology ---------- */
.method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.method-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
}
.method-step .num {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent);
  color: #04150e;
  font-weight: 800;
  font-size: 0.86rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.method-step .body h4 { margin: 0 0 4px; font-size: 0.96rem; color: var(--text); }
.method-step .body p { margin: 0; color: var(--text-dim); font-size: 0.87rem; }

.thinking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.thinking-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.thinking-card h4 { margin: 0 0 4px; font-size: 0.88rem; color: var(--accent); }
.thinking-card p { margin: 0; color: var(--text-dim); font-size: 0.82rem; }

/* ---------- Publications (research.html) ---------- */
.badge-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.pub-item .body h4 { font-size: 1rem; margin: 0 0 6px; }
.pub-meta { color: var(--text-dimmer); font-size: 0.8rem; margin: 0 0 8px; }
.pub-meta strong { color: var(--text); }
.pub-item p:not(.pub-meta) { color: var(--text-dim); font-size: 0.9rem; margin: 0 0 10px; }
.pub-doi {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
.pub-doi:hover { text-decoration: underline; }

/* ---------- Competencies ---------- */
.comp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.comp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.comp-card .icon { font-size: 1.4rem; margin-bottom: 12px; }
.comp-card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.comp-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; }

/* ---------- Projects grid ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}
.filter-btn.active { color: var(--bg); background: var(--accent); border-color: var(--accent); }

.proj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.proj-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  transition: border-color .15s ease, transform .15s ease;
}
.proj-card:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); transform: translateY(-2px); }
.proj-card .thumb {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--bg-alt), var(--bg-card));
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dimmer);
  font-size: 0.78rem;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.proj-card .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
.proj-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.proj-tag { color: var(--accent); font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.proj-body h3 { margin: 0; font-size: 1.04rem; }
.proj-body p { margin: 0; color: var(--text-dim); font-size: 0.88rem; flex: 1; }
.proj-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.chip {
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 999px;
}

/* ---------- Testimonials ---------- */
.testi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.testi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.testi-quote { font-size: 0.98rem; color: var(--text); font-style: italic; }
.testi-quote::before { content: "\201C"; color: var(--accent); font-weight: 800; }
.testi-quote::after { content: "\201D"; color: var(--accent); font-weight: 800; }
.testi-who { display: flex; flex-direction: column; gap: 2px; margin-top: auto; }
.testi-name { font-weight: 700; font-size: 0.9rem; }
.testi-role { color: var(--text-dim); font-size: 0.82rem; }

/* ---------- Contact / footer ---------- */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.contact-card h2 { margin: 0 0 8px; font-size: 1.4rem; }
.contact-card p { margin: 0; color: var(--text-dim); }
.contact-links { display: flex; gap: 12px; flex-wrap: wrap; }

footer.site-footer {
  padding: 32px 0 60px;
  color: var(--text-dimmer);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
footer.site-footer a { color: var(--text-dim); text-decoration: none; }

/* ---------- Project detail page ---------- */
.breadcrumb { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 18px; text-decoration: none; display: inline-flex; gap: 6px; align-items: center; }
.detail-hero { padding: 56px 0 40px; border-bottom: 1px solid var(--border); }
.detail-title { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; margin: 0 0 14px; letter-spacing: -0.01em; }
.detail-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.detail-summary { color: var(--text-dim); font-size: 1.05rem; max-width: 74ch; }
.detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 40px; align-items: start; }
.detail-block { margin-bottom: 32px; }
.detail-block h3 { font-size: 1.02rem; margin: 0 0 14px; color: var(--text); }
.detail-block ul { margin: 0; padding-left: 20px; color: var(--text-dim); font-size: 0.94rem; }
.detail-block li { margin-bottom: 8px; }
.side-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.side-box h4 { margin: 0 0 10px; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dimmer); }
.side-box .val { font-size: 0.95rem; color: var(--text); font-weight: 600; margin-bottom: 6px; }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 14px; margin: 20px 0 32px; }
.gallery img { width: 100%; border: 1px solid var(--border); }
.metric-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.metric { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; min-width: 140px; }
.metric .num { color: var(--accent); font-weight: 800; font-size: 1.3rem; }
.metric .lbl { color: var(--text-dim); font-size: 0.78rem; margin-top: 2px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .menu-btn { display: flex; align-items: center; justify-content: center; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .contact-card { flex-direction: column; align-items: flex-start; }
}

.nav-links.open {
  display: flex;
  position: absolute;
  top: 64px;
  left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  flex-direction: column;
  padding: 16px 24px 24px;
  gap: 16px;
}