:root {
  --color-bg: #fbfaf8;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-text-muted: #5c6770;
  --color-accent: #0f766e;
  --color-accent-dark: #0b5c56;
  --color-accent-soft: #e6f4f2;
  --color-border: #e5e9ec;
  --color-dark: #101418;
  --color-header-bg: rgba(251, 250, 248, 0.85);
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Sora", system-ui, -apple-system, sans-serif;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 20, 24, 0.06);
  --shadow-md: 0 10px 30px rgba(16, 20, 24, 0.08);
  --container-max: 1080px;
  --nav-height: 68px;
}

[data-theme="dark"] {
  --color-bg: #0f1419;
  --color-surface: #1a2128;
  --color-text: #e7edf3;
  --color-text-muted: #9aa7b3;
  --color-accent: #2dd4bf;
  --color-accent-dark: #5eead4;
  --color-accent-soft: #0f302d;
  --color-border: #2a3540;
  --color-dark: #090c10;
  --color-header-bg: rgba(15, 20, 25, 0.85);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-dark);
}

.container {
  width: min(var(--container-max), 100% - 2.5rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--radius) 0;
  z-index: 1000;
}

.skip-link:focus {
  left: 0;
  color: #fff;
}

/* ---------- Header & Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-header-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.brand-dot {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 0.5rem 0.8rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: 8px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-cta {
  margin-left: 0.5rem;
  color: #fff;
  background: var(--color-accent);
}

.nav-cta:hover {
  color: #fff;
  background: var(--color-accent-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

[data-theme="light"] .theme-icon-sun,
[data-theme="dark"] .theme-icon-moon {
  display: none;
}

[data-theme="light"] .theme-icon-moon,
[data-theme="dark"] .theme-icon-sun {
  display: block;
}

/* Smooth theme color transitions */
body,
.site-header,
.job,
.edu-item,
.passion-card,
.contact-item,
.training-card,
.skill-chip,
.section-alt,
.theme-toggle {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.28);
  color: #fff;
}

.btn-outline {
  color: var(--color-text);
  border-color: var(--color-border);
  background: var(--color-surface);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 5.5rem 0 5rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -160px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 14%, transparent), transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -200px;
  left: -180px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 10%, transparent), transparent 65%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  align-items: center;
  gap: 3rem;
}

.hero-eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.hero-subtitle {
  max-width: 36rem;
  margin: 0 0 2rem;
  font-size: 1.08rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 2.25rem;
}

.hero-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero-contact li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  font-size: 0.8rem;
  color: var(--color-accent);
}

svg.contact-icon {
  display: block;
  flex-shrink: 0;
}

.hero-contact .contact-icon {
  font-size: 1.25rem;
}

/* Hero card (monogram) */

.hero-card {
  display: flex;
  justify-content: center;
}

.hero-card-ring {
  width: min(340px, 78vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(from 210deg, var(--color-accent), #2dd4bf, var(--color-accent-soft), var(--color-accent));
  padding: 10px;
}

.hero-card-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-bg);
}

.hero-card-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- Sections ---------- */

.section {
  padding: 4.5rem 0;
  scroll-margin-top: var(--nav-height);
}

.section-alt {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
}

.section-label {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  margin: 0 0 2rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.prose {
  max-width: 62ch;
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

.prose p {
  margin: 0;
}

/* ---------- Skills ---------- */

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skill-chip {
  padding: 0.55rem 1.2rem;
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: 999px;
}

/* ---------- Timeline ---------- */

.timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.4rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), rgba(15, 118, 110, 0.12));
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 26px;
  left: -1.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-accent);
  transform: translateX(-50%);
}

.job {
  padding: 1.75rem 1.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.job:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.job-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.job-role {
  margin: 0 0 0.15rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-text);
}

.job-company {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.job-period {
  flex-shrink: 0;
  padding: 0.3rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border-radius: 999px;
  white-space: nowrap;
}

.job-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.job-bullets li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.job-bullets li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.55;
}

/* ---------- Education ---------- */

.edu-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.edu-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.edu-meta {
  flex-shrink: 0;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  border-radius: 999px;
  height: fit-content;
}

.edu-degree {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
}

.edu-school {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ---------- Training ---------- */

.training-card {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1.5rem 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.training-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
}

.training-org {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ---------- Passions ---------- */

.passion-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.passion-card {
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.passion-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.passion-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  font-size: 1.4rem;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  border-radius: 12px;
}

.passion-name {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
}

.passion-desc {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ---------- Contact ---------- */

.contact-section {
  text-align: center;
}

.contact-intro {
  margin: 0 0 2rem;
  color: var(--color-text-muted);
}

.contact-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 46rem;
  text-align: left;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.contact-item .contact-icon {
  width: 44px;
  height: 44px;
  font-size: 1.1rem;
  background: var(--color-accent-soft);
  border-radius: 10px;
}

.contact-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact-item a,
.contact-item span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 1.75rem 0;
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.88rem;
}

.site-footer p {
  margin: 0;
  text-align: center;
}

/* ---------- Back to top ---------- */

.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 46px;
  height: 46px;
  border: none;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, background-color 0.2s ease;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-dark);
}

/* ---------- Reveal animations ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    text-align: center;
  }

  .hero-subtitle {
    margin-inline: auto;
  }

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

  .hero-card {
    order: -1;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem 1.25rem 1.25rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }

  .nav-cta {
    margin-left: 0;
    text-align: center;
  }

  .edu-list,
  .passion-grid,
  .contact-list {
    grid-template-columns: 1fr;
  }

  .job-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .job-period {
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 3.5rem 0 3.5rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .timeline {
    padding-left: 1rem;
  }

  .timeline-item::before {
    left: -1rem;
  }
}