/* ===== Design Tokens: Dark Mode (default) ===== */
:root {
  --bg: #020617;
  --bg-soft: #0f172a;
  --panel: #0f172a;
  --panel-alt: #020617;
  --text: #eef2ff;
  --muted: #94a3b8;
  --line: rgba(148, 163, 184, 0.08);
  --line-strong: rgba(148, 163, 184, 0.14);
  --accent: #60a5fa;
  --accent-soft: #93c5fd;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  --body-radial: rgba(20, 80, 190, 0.35);
  --body-glow: rgba(59, 130, 246, 0.15);
  --body-top: #020617;
  --body-bottom: #020617;
  --orb-1: rgba(96, 165, 250, 0.14);
  --orb-2: rgba(59, 130, 246, 0.08);
  --orb-3: rgba(96, 165, 250, 0.11);
  --orb-4: rgba(147, 197, 253, 0.04);
  --grid-1: rgba(148, 163, 184, 0.025);
  --grid-2: rgba(148, 163, 184, 0.02);
  --header-bg: rgba(15, 23, 42, 0.88);
}

/* ===== Design Tokens: Light Mode ===== */
body[data-theme="light"] {
  --bg: #f0f4ff;
  --bg-soft: #f0f4ff;
  --panel: #f0f4ff;
  --panel-alt: #f0f4ff;
  --text: #0f172a;
  --muted: #475569;
  --line: rgba(15, 23, 42, 0.08);
  --line-strong: rgba(15, 23, 42, 0.14);
  --accent: #2563eb;
  --accent-soft: #1d4ed8;
  --shadow: 0 22px 60px rgba(15, 23, 42, 0.08);
  --body-radial: rgba(37, 99, 235, 0.06);
  --body-glow: rgba(96, 165, 250, 0.06);
  --body-top: #f0f4ff;
  --body-bottom: #f0f4ff;
  --orb-1: rgba(37, 99, 235, 0.08);
  --orb-2: rgba(37, 99, 235, 0.04);
  --orb-3: rgba(96, 165, 250, 0.06);
  --orb-4: rgba(147, 197, 253, 0.04);
  --grid-1: rgba(15, 23, 42, 0.03);
  --grid-2: rgba(15, 23, 42, 0.025);
  --header-bg: rgba(240, 244, 255, 0.72);
}

/* ===== Reset ===== */
* {
  box-sizing: border-box;
}

html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  font-family: "DM Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse at top center, var(--body-radial), transparent 55%),
    radial-gradient(circle at top left, var(--body-glow), transparent 30%),
    linear-gradient(180deg, var(--body-top) 0%, var(--body-bottom) 100%);
  background-attachment: fixed;
  transition: background-color 220ms ease, color 220ms ease, background 220ms ease;
}

/* ===== Animated Background ===== */
.bg-animation,
.bg-orbs,
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-animation {
  z-index: 0;
  overflow: hidden;
}

.bg-orbs {
  background:
    radial-gradient(circle at 18% 22%, var(--orb-1), transparent 0 18%),
    radial-gradient(circle at 78% 18%, var(--orb-2), transparent 0 14%),
    radial-gradient(circle at 68% 72%, var(--orb-3), transparent 0 18%),
    radial-gradient(circle at 30% 82%, var(--orb-4), transparent 0 16%);
  filter: blur(28px);
  transform: scale(1.08);
  animation: ambient-drift 18s ease-in-out infinite alternate;
}

.bg-grid {
  opacity: 0.22;
  background-image:
    linear-gradient(var(--grid-1) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-2) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 88%);
  animation: grid-drift 24s linear infinite;
}

/* ===== Links & Skip ===== */
a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: #fff;
  color: #000;
}

/* ===== Page Shell ===== */
.page-shell {
  width: min(1600px, calc(100vw - 4rem));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
  position: relative;
  z-index: 1;
}

/* ===== Header & Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-top: 0.25rem;
  backdrop-filter: blur(14px);
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  width: 100%;
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  color: var(--muted);
  align-items: center;
}

.nav-links a:hover,
.contact-links a:hover,
.button:hover {
  color: var(--text);
}

/* ===== Resume Dropdown ===== */
.resume-menu {
  position: relative;
}

.resume-menu summary {
  list-style: none;
  cursor: pointer;
  color: inherit;
}

.resume-menu summary::-webkit-details-marker {
  display: none;
}

.resume-menu summary::after {
  content: "▾";
  margin-left: 0.35rem;
  font-size: 0.75em;
}

.resume-menu[open] summary,
.resume-menu summary:hover,
.resume-menu summary:focus-visible {
  color: var(--text);
}

.resume-dropdown {
  position: absolute;
  top: calc(100% + 0.7rem);
  left: 50%;
  display: grid;
  gap: 0.35rem;
  min-width: 12.5rem;
  padding: 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 1rem;
  background: rgba(15, 23, 42, 0.98);
  box-shadow: var(--shadow);
  transform: translateX(-50%);
  z-index: 30;
}

.resume-dropdown a {
  display: block;
  padding: 0.65rem 0.8rem;
  border-radius: 0.8rem;
}

.resume-dropdown a:hover,
.resume-dropdown a:focus-visible {
  background: rgba(96, 165, 250, 0.08);
  color: var(--text);
}

body[data-theme="light"] .resume-dropdown {
  background: rgba(240, 244, 255, 0.98);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.45rem 0.7rem 0.45rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: rgba(96, 165, 250, 0.24);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  color: var(--text);
  transition: color 180ms ease, opacity 180ms ease;
}

.theme-toggle-icon svg {
  width: 100%;
  height: 100%;
}

.theme-icon-sun {
  opacity: 0;
}

.theme-icon-moon {
  opacity: 1;
}

.theme-toggle-track {
  position: relative;
  width: 2.6rem;
  height: 1.45rem;
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.18);
}

.theme-toggle-thumb {
  position: absolute;
  top: 0.17rem;
  left: 0.18rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--accent-soft);
  transition: transform 220ms ease, background-color 220ms ease;
}

body[data-theme="light"] .theme-toggle-track {
  background: rgba(37, 99, 235, 0.22);
}

body[data-theme="light"] .theme-toggle-thumb {
  transform: translateX(1.12rem);
  background: var(--accent);
}

body[data-theme="light"] .theme-toggle-icon {
  color: var(--accent);
}

body[data-theme="light"] .theme-icon-sun {
  opacity: 1;
}

body[data-theme="light"] .theme-icon-moon {
  opacity: 0;
}

body[data-theme="light"] .button.primary {
  background: var(--text);
  color: #f0f4ff;
}

/* ===== Hero Section ===== */
.hero-section {
  padding: 5.5rem 0 4rem;
}

.eyebrow,
.section-label,
.project-index {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: "Manrope", sans-serif;
}

.hero-main .eyebrow {
  font-size: clamp(2rem, 5vw, 3.6rem);
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--text);
  font-family: "Manrope", sans-serif;
  font-weight: 700;
}

#about .section-label,
#experience .section-label,
#skills .section-label,
#projects .section-label,
#dashboards .section-label,
#education .section-label,
#publications .section-label,
#contact .section-label {
  font-size: clamp(1rem, 1.6vw, 1.45rem);
  letter-spacing: 0.08em;
}

.hero-title,
h2,
h3,
.stat-card strong {
  font-family: "Manrope", sans-serif;
}

.hero-title {
  max-width: 100%;
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.1rem, 2.8vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.hero-title span {
  color: var(--accent-soft);
}

.hero-summary {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.75;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.hero-main,
.hero-side {
  display: flex;
  justify-content: center;
}

.hero-main {
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: min(100%, 860px);
  margin: 0 auto;
}

/* ===== Typed Animation ===== */
.hero-title-typed {
  max-width: none;
  min-height: 1.5em;
  padding-bottom: 0.18em;
}

.typed-shell {
  position: relative;
  display: inline-block;
  max-width: 100%;
  white-space: nowrap;
  overflow: visible;
  padding-bottom: 0.14em;
}

.typed-ghost {
  visibility: hidden;
}

.typed-text {
  position: absolute;
  inset: 0 auto 0 0;
  display: inline-block;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  color: var(--accent-soft);
  width: 0;
  animation: typing 3.8s steps(50, end) 0.2s forwards;
}

.typed-cursor {
  position: absolute;
  top: 0.08em;
  left: 0;
  display: inline-block;
  width: 0.08em;
  height: 0.9em;
  background: var(--accent-soft);
  vertical-align: -0.08em;
  animation:
    cursor-track 3.8s steps(50, end) 0.2s forwards,
    blink 900ms steps(1) infinite;
}

.typed-mobile {
  display: none;
}

/* ===== Buttons ===== */
.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.hero-actions {
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.25rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--text);
  color: #0a0d14;
}

.button.secondary {
  background: transparent;
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3.25rem;
}

.stat-card {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  box-shadow: var(--shadow);
}

.stat-card strong {
  display: block;
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: -0.06em;
}

.stat-card span {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
}

/* ===== Section ===== */
.section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: 2rem;
}

h2 {
  max-width: 14ch;
  margin: 0.5rem 0 0;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  margin: 0;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  letter-spacing: -0.04em;
}

/* ===== About Grid & Image ===== */
.about-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
}

.about-image-container {
  position: relative;
}

.about-image-wrapper {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(96, 165, 250, 0.14);
  background: var(--body-radial);
  aspect-ratio: 1 / 1.1;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  transition: transform 300ms ease, border-color 300ms ease;
}

.about-image-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.45));
  pointer-events: none;
}

.about-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}

.about-image-wrapper:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: rgba(96, 165, 250, 0.28);
}

.about-image-wrapper:hover .about-image {
  transform: scale(1.03);
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .about-image-container {
    max-width: 320px;
    margin: 0 auto;
  }
}

.copy-block {
  max-width: 100%;
}

.copy-block p {
  margin: 0 0 1rem;
  color: var(--muted);
  line-height: 1.8;
  font-size: 1.05rem;
}

/* ===== Timeline ===== */
.timeline-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.timeline-rail-column {
  position: relative;
  align-self: stretch;
  min-height: 100%;
}

.timeline-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.2rem;
  width: 2px;
  background: rgba(96, 165, 250, 0.14);
  border-radius: 999px;
}

.timeline-rail-progress {
  position: absolute;
  top: 0;
  left: 1.2rem;
  width: 2px;
  height: 0;
  background: linear-gradient(180deg, rgba(96, 165, 250, 0.22), #60a5fa 42%, #93c5fd 100%);
  border-radius: 999px;
  box-shadow: 0 0 28px rgba(96, 165, 250, 0.45);
}

.timeline-rail-glow {
  position: absolute;
  left: 1.2rem;
  top: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #60a5fa;
  transform: translate(-50%, -50%);
  box-shadow:
    0 0 0 8px rgba(96, 165, 250, 0.14),
    0 0 30px rgba(96, 165, 250, 0.72);
  animation: rail-pulse 1.6s ease-in-out infinite;
}

.timeline {
  display: grid;
  gap: 1.5rem;
  align-content: start;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
  gap: 1.5rem 2rem;
  padding: 1.7rem 1.7rem 1.8rem;
  border: 1px solid rgba(96, 165, 250, 0.08);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.96), rgba(15, 23, 42, 0.92));
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
  opacity: 0.35;
  transform: translateY(28px);
  transition:
    opacity 700ms ease,
    transform 700ms ease,
    border-color 700ms ease,
    box-shadow 700ms ease,
    background-color 700ms ease;
}

.timeline-heading {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.timeline-heading h3 {
  margin: 0;
}

.timeline-company-logo {
  flex: 0 0 auto;
  width: 5rem;
  height: 5rem;
  object-fit: contain;
  border-radius: 0.85rem;
}

.timeline-item.visible {
  opacity: 0.82;
  transform: translateY(0);
}

.timeline-item.is-active {
  opacity: 1;
  border-color: rgba(96, 165, 250, 0.18);
  background: linear-gradient(180deg, rgba(51, 65, 85, 0.98), rgba(15, 23, 42, 0.94));
  box-shadow:
    0 18px 60px rgba(0, 0, 0, 0.2),
    0 0 0 1px rgba(96, 165, 250, 0.06) inset,
    0 0 36px rgba(96, 165, 250, 0.12);
}

body[data-theme="light"] .timeline-item {
  border-color: rgba(37, 99, 235, 0.12);
  background: linear-gradient(180deg, rgba(248, 250, 255, 0.97), rgba(240, 244, 255, 0.97));
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

body[data-theme="light"] .timeline-item.is-active {
  border-color: rgba(37, 99, 235, 0.22);
  background: linear-gradient(180deg, rgba(252, 253, 255, 0.99), rgba(240, 244, 255, 0.98));
  box-shadow:
    0 20px 56px rgba(15, 23, 42, 0.1),
    0 0 0 1px rgba(37, 99, 235, 0.08) inset,
    0 0 28px rgba(37, 99, 235, 0.08);
}

.role {
  margin: 0.35rem 0 0;
  color: var(--accent-soft);
  font-weight: 500;
}

.timeline-summary {
  margin: 1rem 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.timeline-toggle {
  margin-top: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 0.95rem;
  border: 1px solid rgba(96, 165, 250, 0.14);
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.05);
  color: var(--accent-soft);
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.timeline-toggle:hover,
.timeline-toggle:focus-visible {
  border-color: rgba(96, 165, 250, 0.28);
  background: rgba(96, 165, 250, 0.1);
  color: var(--text);
  transform: translateY(-1px);
}

.timeline-details[hidden] {
  display: none;
}

.timeline-details {
  margin-top: 0.9rem;
}

.timeline-main ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.8;
}

.timeline-meta {
  text-align: right;
  color: var(--muted);
}

.timeline-meta p {
  margin: 0;
}

/* ===== Skills ===== */
.skills-layout,
.education-grid {
  display: grid;
  gap: 1rem;
}

.skills-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.skill-group,
.info-card,
.contact-panel,
.education-row {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  box-shadow: var(--shadow);
}

.skill-group h3,
.info-card h3 {
  margin-bottom: 1rem;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.chip-list span,
.contact-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.7rem;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.chip-list span:hover {
  border-color: rgba(96, 165, 250, 0.28);
  color: var(--accent-soft);
  background: rgba(96, 165, 250, 0.06);
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.dashboards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.project-card-link {
  display: block;
  border-radius: 28px;
}

.project-card {
  height: 100%;
  padding: 1.5rem;
  border: 1px solid rgba(96, 165, 250, 0.08);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.96), rgba(15, 23, 42, 0.92));
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.16);
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    background-color 240ms ease,
    box-shadow 240ms ease;
}

.project-card-link:hover .project-card,
.project-card-link:focus-visible .project-card {
  transform: translateY(-6px);
  border-color: rgba(96, 165, 250, 0.2);
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.22),
    0 0 0 1px rgba(96, 165, 250, 0.08) inset;
  background: linear-gradient(180deg, rgba(51, 65, 85, 0.98), rgba(15, 23, 42, 0.94));
}

body[data-theme="light"] .project-card {
  border-color: rgba(37, 99, 235, 0.1);
  background: linear-gradient(180deg, rgba(248, 250, 255, 0.98), rgba(240, 244, 255, 0.96));
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

body[data-theme="light"] .project-card-link:hover .project-card,
body[data-theme="light"] .project-card-link:focus-visible .project-card {
  background: linear-gradient(180deg, rgba(252, 253, 255, 1), rgba(240, 244, 255, 0.98));
  box-shadow:
    0 20px 56px rgba(15, 23, 42, 0.1),
    0 0 0 1px rgba(37, 99, 235, 0.08) inset;
}

.project-card-link:hover h3,
.project-card-link:focus-visible h3,
.project-card-link:hover .project-icon,
.project-card-link:focus-visible .project-icon {
  color: var(--accent-soft);
}

.project-card-link:focus-visible {
  outline: 2px solid rgba(96, 165, 250, 0.45);
  outline-offset: 4px;
}

.project-card p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.project-card h3 {
  margin-top: 0.25rem;
}

.project-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-top: 0.85rem;
  border: 1px solid rgba(96, 165, 250, 0.14);
  border-radius: 16px;
  color: var(--accent);
  background: rgba(96, 165, 250, 0.06);
  transition:
    color 240ms ease,
    border-color 240ms ease,
    background-color 240ms ease;
}

.project-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.project-stack {
  color: var(--accent-soft) !important;
  font-size: 0.95rem;
  margin-top: 1.2rem !important;
}

/* ===== Education ===== */
.education-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.education-list {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.education-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem 2rem;
  align-items: center;
}

.education-row h3 {
  margin: 0;
}

.education-row p,
.education-row span {
  color: var(--muted);
}

.education-row p {
  margin: 0.45rem 0 0;
}

.education-row span {
  white-space: nowrap;
}

/* ===== Certifications ===== */
.certifications-grid {
  margin-top: 1.25rem;
}

.cert-card-link {
  position: relative;
  display: block;
  overflow: hidden;
  min-height: 10rem;
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background-color 220ms ease,
    box-shadow 220ms ease;
}

.cert-card-link:hover,
.cert-card-link:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, 0.18);
  box-shadow:
    0 20px 48px rgba(0, 0, 0, 0.18),
    0 0 0 1px rgba(96, 165, 250, 0.08) inset;
}

.cert-card-link:hover h3,
.cert-card-link:focus-visible h3 {
  color: var(--accent-soft);
}

.cert-card-link:focus-visible {
  outline: 2px solid rgba(96, 165, 250, 0.45);
  outline-offset: 4px;
}

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

.info-card span {
  display: inline-block;
  margin-top: 0.6rem;
}

/* ===== Cert Badge ===== */
.cert-badge {
  display: block;
  width: 5rem;
  height: 5rem;
  object-fit: contain;
  margin-bottom: 1rem;
  border-radius: 8px;
}

/* ===== Contact ===== */
.contact-panel {
  display: grid;
  gap: 1.5rem;
}

.contact-links {
  margin-top: 0.5rem;
}

.contact-link-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===== Publications ===== */
.publication-card {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color 220ms ease, transform 220ms ease;
}

.publication-card:hover {
  border-color: rgba(96, 165, 250, 0.18);
  transform: translateY(-2px);
}

.publication-card .pub-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  border-radius: 16px;
  background: rgba(96, 165, 250, 0.06);
  border: 1px solid rgba(96, 165, 250, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.publication-card .pub-info {
  flex: 1;
}

.publication-card .pub-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.publication-card .pub-info p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

.publication-card .pub-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.85rem;
  transition: background 180ms ease, border-color 180ms ease;
}

.publication-card .pub-link:hover {
  background: rgba(96, 165, 250, 0.08);
  border-color: rgba(96, 165, 250, 0.28);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Keyframe Animations ===== */
@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

@keyframes ambient-drift {
  0% {
    transform: translate3d(-2%, -1%, 0) scale(1.06);
  }
  50% {
    transform: translate3d(2%, 2%, 0) scale(1.1);
  }
  100% {
    transform: translate3d(-1%, 4%, 0) scale(1.08);
  }
}

@keyframes grid-drift {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(44px, 22px, 0);
  }
}

@keyframes rail-pulse {
  0%,
  100% {
    box-shadow:
      0 0 0 8px rgba(96, 165, 250, 0.1),
      0 0 22px rgba(96, 165, 250, 0.56);
  }
  50% {
    box-shadow:
      0 0 0 14px rgba(96, 165, 250, 0.07),
      0 0 36px rgba(96, 165, 250, 0.82);
  }
}

@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes cursor-track {
  from {
    left: 0;
  }
  to {
    left: calc(100% - 0.08em);
  }
}

/* ===== Responsive: Tablet (<=900px) ===== */
@media (max-width: 900px) {
  .stats-grid,
  .skills-layout,
  .education-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.9rem;
    padding: 1.1rem 1rem 1.15rem;
    border-radius: 22px;
  }

  .projects-grid,
  .dashboards-grid {
    grid-template-columns: 1fr;
  }

  .education-row {
    grid-template-columns: 1fr;
  }

  .education-row span {
    white-space: normal;
  }

  .timeline-wrap {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 0.9rem;
  }

  .timeline-rail-column {
    display: block;
  }

  .timeline-rail,
  .timeline-rail-progress {
    left: 0.9rem;
  }

  .timeline-rail-glow {
    left: 0.9rem;
    width: 14px;
    height: 14px;
  }

  .timeline-meta,
  .project-stack {
    text-align: left;
    white-space: normal;
  }

  .timeline-main h3 {
    font-size: clamp(1.25rem, 4vw, 1.6rem);
  }

  .timeline-main .role {
    font-size: 0.92rem;
  }

  .timeline-summary {
    font-size: 0.95rem;
    line-height: 1.65;
  }

  .timeline-toggle {
    font-size: 0.9rem;
    padding: 0.55rem 0.85rem;
  }

  .timeline-main ul {
    padding-left: 0.95rem;
    font-size: 0.95rem;
    line-height: 1.65;
  }

  .timeline-meta {
    font-size: 0.92rem;
  }

  .typed-shell {
    display: block;
    width: 100%;
    white-space: normal;
    overflow: hidden;
    padding-bottom: 0;
  }

  .typed-ghost {
    display: none;
  }

  .typed-text {
    display: none;
  }

  .typed-cursor {
    display: none;
  }

  .typed-mobile {
    display: grid;
    justify-items: center;
    gap: 0.2rem;
    color: var(--accent-soft);
    line-height: 1.22;
  }

  .typed-mobile-line {
    display: inline-block;
    white-space: nowrap;
    overflow: hidden;
    width: 0;
  }

  .typed-mobile-line-1 {
    animation: typing-mobile-line-1 1.9s steps(34, end) 0.2s forwards;
  }

  .typed-mobile-line-2 {
    animation: typing-mobile-line-2 1.1s steps(13, end) 2.15s forwards;
  }

  .hero-actions {
    justify-content: center;
  }

  .button {
    width: 100%;
    max-width: 18rem;
  }

  .publication-card {
    flex-direction: column;
    text-align: center;
  }
}

/* ===== Responsive: Phone (<=640px) ===== */
@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1rem, 1120px);
  }

  .topbar {
    justify-content: center;
    padding: 0.65rem 0;
    flex-wrap: wrap;
  }

  .nav-links {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(6, max-content);
    justify-content: space-between;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  .resume-dropdown {
    left: auto;
    right: 0;
    transform: none;
    min-width: 10.75rem;
  }

  .theme-toggle {
    padding: 0.38rem 0.62rem;
  }

  .hero-section {
    padding: 3.5rem 0 3rem;
  }

  .hero-main {
    width: 100%;
  }

  .timeline-wrap {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 0.75rem;
  }

  .timeline-rail,
  .timeline-rail-progress {
    left: 0.7rem;
  }

  .timeline-rail-glow {
    left: 0.7rem;
    width: 12px;
    height: 12px;
    box-shadow:
      0 0 0 6px rgba(96, 165, 250, 0.12),
      0 0 22px rgba(96, 165, 250, 0.56);
  }

  .hero-main .eyebrow {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
    text-align: center;
  }

  .hero-title {
    font-size: clamp(0.9rem, 5.2vw, 1.35rem);
    line-height: 1.25;
    letter-spacing: -0.04em;
    margin-top: 0.7rem;
  }

  .hero-summary {
    font-size: 0.98rem;
  }

  .typed-text {
    font-size: inherit;
    text-align: center;
    white-space: normal;
    width: 100%;
  }

  .hero-title-typed {
    min-height: auto;
    padding-bottom: 0;
  }

  .typed-mobile {
    font-size: clamp(0.92rem, 4.9vw, 1.22rem);
  }

  .timeline-item {
    padding: 0.95rem 0.9rem 1rem;
  }

  .timeline-heading {
    gap: 0.7rem;
  }

  .timeline-company-logo {
    width: 4rem;
    height: 4rem;
  }

  .timeline-main h3 {
    font-size: 1.15rem;
  }

  .timeline-summary,
  .timeline-main .role,
  .timeline-meta,
  .timeline-main ul {
    font-size: 0.9rem;
  }

  .timeline-toggle {
    width: 100%;
    justify-content: center;
  }
}

@keyframes typing-mobile-line-1 {
  from {
    width: 0;
  }
  to {
    width: 34ch;
  }
}

@keyframes typing-mobile-line-2 {
  from {
    width: 0;
  }
  to {
    width: 13ch;
  }
}