/* ============================================================
   Sections
   ============================================================ */

.section {
  padding: 7rem 0;
  position: relative;
  scroll-margin-top: 90px;
}

.section.alt {
  background: var(--bone-2);
}

body[data-theme="dark"] .section.alt {
  background: var(--bone-2);
}

.section-title {
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  gap: 1.5rem;
  margin-bottom: 4rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

.section-title h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variation-settings: "opsz" 144, "SOFT" 50, "WONK" 1;
  margin: 0;
  color: var(--ink);
}

.section-title h2 em {
  font-style: italic;
  color: var(--signal);
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
}

.section-title p {
  grid-column: 1;
  color: var(--muted);
  font-size: 1rem;
  max-width: 36rem;
  margin-top: 0.75rem;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--signal);
  transition: width 1s var(--ease-out) 0.2s;
}

.section-title.is-visible::after {
  width: 88px;
}

h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

/* ============================================================
   Profile
   ============================================================ */

.profile-grid {
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr;
  margin-bottom: 4rem;
}

@media (min-width: 900px) {
  .profile-grid {
    grid-template-columns: 1.6fr 1fr;
    gap: 4rem;
  }
}

.profile-grid > div:first-child p {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--ink);
  font-variation-settings: "opsz" 30, "SOFT" 50;
}

.profile-grid > div:first-child p::first-letter {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: italic;
  font-size: 3.2em;
  float: left;
  line-height: 0.85;
  margin: 0.05em 0.12em 0 -0.05em;
  color: var(--signal);
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
}

.profile-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.profile-pills span {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--rule-strong);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.profile-pills span:hover {
  background: var(--ink);
  color: var(--bone);
  border-color: var(--ink);
  transform: translateY(-3px);
}

.spotlight {
  background: var(--ink);
  color: var(--bone);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.spotlight::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--signal) 0%, transparent 60%);
  opacity: 0.4;
  filter: blur(50px);
  pointer-events: none;
}

.spotlight h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--signal);
  margin-bottom: 1.5rem;
  font-weight: 500;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed rgba(244, 239, 228, 0.2);
}

.spotlight ul {
  display: grid;
  gap: 0.85rem;
}

.spotlight ul li {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--bone);
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-variation-settings: "opsz" 30, "SOFT" 50;
}

/* Stats grid */
.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.stats {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.stats .card {
  background: var(--surface);
  border: none;
  border-radius: 0;
  box-shadow: none;
  text-align: center;
  padding: 2rem 1.75rem;
  transition: background 0.4s var(--ease-out);
}

.stats .card:hover {
  background: var(--bone-2);
  transform: none;
  box-shadow: none;
}

.stat {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
  font-variation-settings: "opsz" 144, "SOFT" 50, "WONK" 1;
  color: var(--ink);
  transition: color 0.3s linear;
}

.stats .card:hover .stat {
  color: var(--signal);
  background: none;
  -webkit-text-fill-color: var(--signal);
}

.stats .card p:last-child {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.stat-link {
  text-decoration: none;
  position: relative;
  display: block;
}

.stat-link::after {
  content: "↗";
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: var(--soft);
  font-size: 1rem;
  transition: transform 0.3s var(--ease-out), color 0.2s linear;
}

.stat-link:hover::after {
  color: var(--signal);
  transform: translate(3px, -3px);
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--rule);
}

.so-badge { color: #f48024; border-color: rgba(244, 128, 36, 0.3); }
.scholar-badge { color: #4285f4; border-color: rgba(66, 133, 244, 0.3); }

/* ============================================================
   Cards
   ============================================================ */

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: transform 0.45s var(--ease-out), border-color 0.3s linear, box-shadow 0.4s var(--ease-out);
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    520px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 77, 31, 0.08),
    transparent 50%
  );
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
  z-index: 0;
}

.card:hover {
  border-color: var(--rule-strong);
  box-shadow: var(--shadow-2);
}

.card:hover::before { opacity: 1; }

.card > * { position: relative; z-index: 1; }

.card h3,
.card h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  font-variation-settings: "opsz" 30, "SOFT" 50;
  color: var(--ink);
}

.card h3 { font-size: 1.4rem; }
.card h4 { font-size: 1.15rem; }

.card p { color: var(--muted); }

.muted { color: var(--muted); font-size: 0.85rem; }

/* Education */

.education-cards .education-card {
  position: relative;
  padding-top: 2.25rem;
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.education-card__badges {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
}

.edu-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 4px;
  border: 1px solid var(--signal);
  color: var(--signal);
  background: transparent;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.edu-badge:hover {
  background: var(--signal);
  color: var(--text-on-signal);
}

/* Publications */

.publication-profiles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  grid-column: 2;
  margin-top: 0.6rem;
}

.publication-profiles a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 4px;
  border: 1px solid var(--rule-strong);
  color: var(--muted);
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.publication-profiles a::after {
  content: "↗";
  transition: transform 0.3s var(--ease-out);
}

.publication-profiles a:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.publication-profiles a:hover::after {
  transform: translate(2px, -2px);
}

/* ============================================================
   Experience — accordion timeline
   ============================================================ */

.accordion {
  display: grid;
  gap: 1rem;
  position: relative;
  padding-left: 2.5rem;
}

.accordion::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 1.5rem;
  bottom: 1.5rem;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--rule-strong) 12%, var(--rule-strong) 88%, transparent);
}

.accordion-item {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 0.4rem 1.5rem;
  position: relative;
  transition: border-color 0.3s linear, box-shadow 0.3s linear;
}

.accordion-item::before {
  content: "";
  position: absolute;
  left: -2.5rem;
  top: 1.5rem;
  margin-left: 1px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--rule-strong);
  z-index: 1;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.accordion-item[open]::before {
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 5px rgba(255, 77, 31, 0.18);
}

.accordion-item:hover {
  border-color: var(--rule-strong);
}

.accordion-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 0;
}

.accordion-item summary::-webkit-details-marker { display: none; }

.exp-header {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.exp-company {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.exp-designation {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.015em;
  font-variation-settings: "opsz" 30, "SOFT" 50;
}

.exp-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--soft);
  white-space: nowrap;
}

.accordion-chevron {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-spring), border-color 0.3s linear, background 0.3s linear, color 0.3s linear;
  color: var(--muted);
  flex-shrink: 0;
}

.accordion-chevron svg { width: 14px; height: 14px; }

.accordion-item[open] .accordion-chevron {
  transform: rotate(180deg);
  background: var(--signal);
  border-color: var(--signal);
  color: var(--text-on-signal);
}

.accordion-body {
  padding: 0 0 1.5rem;
  display: grid;
  gap: 1rem;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.45s var(--ease-out), transform 0.45s var(--ease-out);
}

.accordion-item[open] .accordion-body {
  opacity: 1;
  transform: translateY(0);
}

.exp-highlight {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
  padding: 0.85rem 1.1rem;
  background: var(--bone-2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  margin: 0;
  font-variation-settings: "opsz" 30, "SOFT" 100, "WONK" 1;
}

.accordion-body ul {
  display: grid;
  gap: 0.7rem;
}

main ul { list-style: none; padding-left: 0; margin: 0; }

.accordion-body ul li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.accordion-body ul li::before {
  content: "";
  flex: 0 0 auto;
  margin-top: 0.65em;
  width: 18px;
  height: 1px;
  background: var(--signal);
}

/* Hero card list */
.glass-card ul li::before { content: ">"; width: auto; height: auto; background: none; color: var(--signal); }

/* ============================================================
   Tags
   ============================================================ */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
  align-items: center;
  padding-top: 0.25rem;
}

.tags span {
  font-family: var(--font-mono);
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 0;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color 0.25s linear;
  cursor: default;
  position: relative;
}

/* Base tags are plain metadata. Project/cert cards refine this into
   comma-separated inline text below. */
.tags span::before {
  content: "";
  display: none;
}

.project-card .tags,
.cert-card .tags {
  gap: 0;
  align-items: baseline;
  line-height: 1.55;
}

.project-card .tags span,
.cert-card .tags span {
  display: inline;
  margin-right: 0.35rem;
}

.project-card .tags span::before {
  content: "#";
  display: inline;
  color: var(--signal);
}

.project-card .tags span:not(:last-child)::after,
.cert-card .tags span:not(:last-child)::after {
  content: ",";
  color: var(--muted);
}

.tags span:hover {
  color: var(--ink);
}

.tags span:hover::before {
  color: var(--signal);
}

/* ============================================================
   Skills
   ============================================================ */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.skills-grid .card {
  background: var(--surface);
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 1.75rem;
  display: grid;
  gap: 0.85rem;
  align-content: start;
  transition: background 0.4s var(--ease-out);
}

.skills-grid .card:hover {
  transform: none;
  background: var(--bone-2);
}

.skill-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(0.9);
  transition: filter 0.4s var(--ease-out), transform 0.4s var(--ease-spring);
}

.skills-grid .card:hover .skill-icon {
  filter: grayscale(0);
  transform: scale(1.15) rotate(-6deg);
}

.skill-icon img { width: 100%; height: 100%; object-fit: contain; }

.skill-level {
  width: 100%;
  height: 2px;
  background: var(--rule);
  overflow: hidden;
  margin-top: 0.4rem;
  position: relative;
}

.skill-level__fill {
  height: 100%;
  background: var(--signal);
  width: 0;
  transition: width 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
  position: relative;
}

.pill-grid::before {
  content: "// also fluent in";
  position: absolute;
  top: -0.7rem;
  left: 0;
  background: var(--bg);
  padding-right: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.section.alt .pill-grid::before {
  background: var(--bone-2);
}

.pill-grid span {
  font-family: var(--font-mono);
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--muted);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
  cursor: default;
}

.pill-grid span:hover {
  background: var(--signal);
  color: var(--text-on-signal);
  border-color: var(--signal);
  transform: translateY(-2px);
}

/* ============================================================
   Projects
   ============================================================ */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 2.5rem;
  padding: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 999px;
  width: fit-content;
}

.filter-btn {
  border: none;
  background: transparent;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: background 0.35s var(--ease-out), color 0.35s var(--ease-out), border-color 0.35s var(--ease-out), transform 0.35s var(--ease-out);
  position: relative;
}

.filter-btn:hover {
  color: var(--ink);
}

.filter-btn.active {
  color: var(--bone);
  background: var(--ink);
}

.projects {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.projects .card {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.project-card {
  transition: opacity 0.4s ease, transform 0.4s ease, border-color 0.3s linear;
  position: relative;
}

.project-card.is-hidden { display: none; }

/* ============================================================
   Certifications
   ============================================================ */

.cert-card {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.cert-card .hero-links,
.projects .hero-links {
  flex-direction: column;
  align-items: stretch;
  gap: 0.5rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.1rem;
  margin-top: 0.5rem;
}

.cert-card .hero-links a,
.projects .hero-links a {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  padding: 0.65rem 1rem;
  background: var(--ink);
  color: var(--bone);
  border: 1px solid var(--ink);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: background 0.3s linear, color 0.3s linear, border-color 0.3s linear, transform 0.3s var(--ease-out);
}

.cert-card .hero-links a::after,
.projects .hero-links a::after {
  content: "→";
  font-size: 1em;
  transition: transform 0.3s var(--ease-out);
}

.cert-card .hero-links a:hover,
.projects .hero-links a:hover {
  background: var(--signal);
  color: var(--text-on-signal);
  border-color: var(--signal);
  transform: translateY(-2px);
}

.cert-card .hero-links a:hover::after,
.projects .hero-links a:hover::after {
  transform: translateX(4px);
}

.cert-card .hero-links a + a,
.projects .hero-links a + a {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}

.cert-card .hero-links a + a:hover,
.projects .hero-links a + a:hover {
  background: var(--ink);
  color: var(--bone);
  border-color: var(--ink);
}

body[data-theme="dark"] .cert-card .hero-links a + a:hover,
body[data-theme="dark"] .projects .hero-links a + a:hover {
  background: var(--ink);
  color: var(--bg);
}