/*=============== GOOGLE FONTS ===============*/
@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap");

/*=============== VARIABLES ===============*/
:root {
  --header-height: 3.5rem;

  /* Warm & Earthy — Light */
  --accent:         #C2622D;
  --accent-soft:    rgba(194, 98, 45, .12);
  --accent-border:  rgba(194, 98, 45, .22);
  --title-color:    #1C1917;
  --text-color:     #44403C;
  --text-muted:     #78716C;
  --body-color:     #FAF7F2;
  --surface:        #F0E8DC;
  --surface-2:      #E8DDD0;
  --border:         rgba(28, 25, 23, .1);

  /* Typography */
  --font-body:      'Inter', sans-serif;
  --font-display:   'Space Grotesk', sans-serif;
  --font-mono:      'JetBrains Mono', 'Fira Code', monospace;
  --fs-xs:   .688rem;
  --fs-sm:   .813rem;
  --fs-base: .938rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.375rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.25rem;
  --fs-3xl:  3rem;
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semi:    600;

  /* Spacing */
  --radius-sm:  .5rem;
  --radius-md:  1rem;
  --radius-lg:  1.5rem;
  --radius-xl:  2rem;
  --radius-pill: 100rem;

  /* Z-index */
  --z-tooltip: 10;
  --z-fixed:   100;
}

@media (min-width: 1024px) {
  :root {
    --fs-base: 1rem;
    --fs-sm:   .875rem;
    --fs-xs:   .75rem;
    --fs-lg:   1.5rem;
    --fs-xl:   2rem;
    --fs-2xl:  2.75rem;
    --fs-3xl:  3.5rem;
  }
}

/*=============== DARK THEME ===============*/
body.dark-theme {
  --title-color: #F5EFE6;
  --text-color:  #D6CEC4;
  --text-muted:  #A8998A;
  --body-color:  #18120F;
  --surface:     #241C18;
  --surface-2:   #2E2520;
  --border:      rgba(245, 239, 230, .08);
  --accent:      #E07848;
  --accent-soft: rgba(224, 120, 72, .12);
  --accent-border: rgba(224, 120, 72, .25);
}

.dark-theme .nav,
.dark-theme .nav__menu,
.dark-theme .scrollup {
  background-color: var(--surface);
  box-shadow: 0 4px 24px rgba(0,0,0,.5);
}

.dark-theme .section__divider { border-color: var(--border); }

.dark-theme::-webkit-scrollbar { background-color: #241C18; }
.dark-theme::-webkit-scrollbar-thumb { background-color: #3D3028; }
.dark-theme::-webkit-scrollbar-thumb:hover { background-color: #52423A; }

/*=============== RESET ===============*/
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  background-color: var(--body-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background .35s, color .35s;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-semi);
  color: var(--title-color);
  line-height: 1.15;
  letter-spacing: -.02em;
}
ul  { list-style: none; }
a   { text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; }

/*=============== LAYOUT UTILITIES ===============*/
.container {
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: 5rem 2rem;
}

.section__header {
  margin-bottom: 3rem;
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .06em;
  color: var(--accent);
  margin-bottom: .75rem;
}

.section__title {
  font-size: var(--fs-2xl);
  color: var(--title-color);
}

.section__subtitle {
  font-size: var(--fs-base);
  color: var(--text-muted);
  margin-top: .5rem;
}

.section__divider {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: 0 4rem;
}

/* Card base */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color .25s, box-shadow .25s;
}
.card:hover {
  border-color: var(--accent-border);
  box-shadow: 0 8px 32px var(--accent-soft);
}

/* Tag pill */
.tag {
  display: inline-block;
  padding: .25rem .75rem;
  background-color: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
  letter-spacing: .02em;
}

/* Accent button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.25rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  font-family: var(--font-body);
  transition: background .25s, color .25s, transform .2s;
}
.btn--primary {
  background-color: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn--primary:hover { background-color: #A84F22; transform: translateY(-1px); }

.btn--ghost {
  background: none;
  color: var(--accent);
  border: 1px solid var(--accent-border);
}
.btn--ghost:hover { background-color: var(--accent-soft); }

/* Arch diagram: generic node */
.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/*=============== SCROLLBAR ===============*/
::-webkit-scrollbar { width: .5rem; background-color: var(--surface); }
::-webkit-scrollbar-thumb { background-color: var(--surface-2); border-radius: var(--radius-pill); }
::-webkit-scrollbar-thumb:hover { background-color: var(--text-muted); }

/*=============== HEADER & NAV ===============*/
.header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  transition: background .35s, box-shadow .35s;
}

.header.bg-header {
  background-color: var(--body-color);
  box-shadow: 0 1px 0 var(--border);
}

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

.nav__logo {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--title-color);
  letter-spacing: -.01em;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
  transition: color .2s;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -.25rem;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent);
  transition: width .25s;
}

.nav__link:hover,
.nav__link.active-link {
  color: var(--title-color);
}

.nav__link:hover::after,
.nav__link.active-link::after {
  width: 100%;
}

/* Remove icons from nav links on desktop */
.nav__link i { display: none; }

.nav__buttons {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.change-theme {
  font-size: 1.15rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color .2s;
}
.change-theme:hover { color: var(--title-color); }

.nav__toggle {
  display: none;
  font-size: 1.25rem;
  color: var(--title-color);
  cursor: pointer;
}

.nav__close {
  display: none;
}

/* Mobile nav */
@media (max-width: 1023px) {
  .nav__toggle { display: flex; align-items: center; }

  .nav__menu {
    position: fixed;
    inset: 0 0 auto 0;
    background-color: var(--body-color);
    padding: 5rem 2rem 3rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform .35s cubic-bezier(.4,0,.2,1);
    z-index: var(--z-fixed);
    box-shadow: 0 8px 32px rgba(0,0,0,.08);
  }

  .nav__menu.show-menu { transform: translateY(0); }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .nav__item { width: 100%; border-bottom: 1px solid var(--border); }

  .nav__link {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 1rem 0;
    font-size: var(--fs-md);
    color: var(--title-color);
  }

  .nav__link i { display: inline; font-size: 1.2rem; }
  .nav__link::after { display: none; }

  .nav__close {
    display: flex;
    align-items: center;
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    font-size: 1.5rem;
    color: var(--title-color);
    cursor: pointer;
  }

  .header { background-color: var(--body-color); }
}

/*=============== HERO ===============*/
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 4rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr 300px;
    gap: 4rem;
  }
}

@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr 340px;
    gap: 5rem;
  }
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.5rem;
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .35rem 1rem;
  background-color: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
}

.hero__status-dot {
  width: 6px; height: 6px;
  background-color: #22C55E;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(34,197,94,.25);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 2px rgba(34,197,94,.25); }
  50%       { box-shadow: 0 0 0 5px rgba(34,197,94,.08); }
}

.hero__title {
  font-size: var(--fs-2xl);
  line-height: 1.1;
  margin-bottom: 1.25rem;
  letter-spacing: -.02em;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

@media (min-width: 1024px) {
  .hero__title { font-size: var(--fs-3xl); }
}

.hero__bio {
  font-size: var(--fs-md);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 52ch;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero__stats {
  display: flex;
  gap: 2.5rem;
}

.hero__stat-number {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semi);
  color: var(--title-color);
  line-height: 1;
}

.hero__stat-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: .25rem;
}

/* Photo card */
.hero__photo-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  background-color: var(--surface);
  border: 1px solid var(--border);
}

.hero__photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero__photo-badge {
  position: absolute;
  bottom: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  background-color: rgba(250, 247, 242, .85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: .85rem 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.dark-theme .hero__photo-badge {
  background-color: rgba(24, 18, 15, .85);
}

.hero__photo-badge-icon {
  width: 2rem; height: 2rem;
  background-color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .875rem;
  flex-shrink: 0;
}

.hero__photo-badge-icon img {
  width: 1.25rem;
  height: auto;
  object-fit: contain;
}

.hero__photo-badge-text strong {
  display: block;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  color: var(--title-color);
}

.hero__photo-badge-text span {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/*=============== VENTURES ===============*/
.ventures__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .ventures__grid { grid-template-columns: 1fr 1fr; }
}

.venture-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s;
}

.venture-card:hover {
  border-color: var(--accent-border);
  box-shadow: 0 12px 40px var(--accent-soft);
}

.venture-card__header {
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.venture-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.venture-card__icon {
  width: 3rem; height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--accent-soft);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--accent);
}

.venture-card__icon--img img {
  width: 1.5rem;
  height: auto;
  object-fit: contain;
}

.dark-theme .venture-card__icon--img img {
  filter: invert(1);
}

.venture-card__name {
  font-size: var(--fs-lg);
  margin-bottom: .35rem;
}

.venture-card__tagline {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.venture-card__link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  color: var(--accent);
  letter-spacing: .04em;
  transition: gap .2s;
}
.venture-card__link:hover { gap: .6rem; }

/* Architecture diagram section */
.venture-card__arch {
  padding: 1.75rem 2rem;
}

.arch-title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* Node-based arch diagram */
.arch-flow {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.arch-row {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.arch-node {
  flex: 1;
  background-color: var(--body-color);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .5rem .75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--text-color);
  text-align: center;
  transition: border-color .2s;
}

.arch-node--accent {
  background-color: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}

.arch-node--dark {
  background-color: var(--title-color);
  border-color: var(--title-color);
  color: var(--body-color);
}

.dark-theme .arch-node--dark {
  background-color: var(--title-color);
  color: var(--body-color);
}

.arch-arrow {
  font-size: .75rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.arch-arrow--down {
  display: flex;
  justify-content: center;
  margin: .1rem 0;
  color: var(--text-muted);
  font-size: .8rem;
}

.arch-cols {
  display: grid;
  gap: .5rem;
}

.arch-cols-2 { grid-template-columns: 1fr 1fr; }
.arch-cols-3 { grid-template-columns: 1fr 1fr 1fr; }

/*=============== SKILLS ===============*/
.skills__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .skills__grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 900px) {
  .skills__grid { grid-template-columns: 1fr 1fr 1fr; }
}

.skill-group {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color .25s, box-shadow .25s;
}

.skill-group:hover {
  border-color: var(--accent-border);
  box-shadow: 0 8px 32px var(--accent-soft);
}

.skill-group__title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .85rem;
  background-color: var(--body-color);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--text-color);
  transition: border-color .2s, background .2s;
}

.skill-tag:hover {
  border-color: var(--accent-border);
  background-color: var(--accent-soft);
  color: var(--accent);
}

.skill-tag--active {
  border-color: var(--accent-border);
  background-color: var(--accent-soft);
  color: var(--accent);
  font-weight: var(--fw-semi);
}

.skill-tag img {
  width: 14px; height: 14px;
  object-fit: contain;
}

.dark-theme .skill-tag--invert-dark img {
  filter: brightness(0) invert(1);
}

/*=============== TIMELINE / EXPERIENCE ===============*/
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: .75rem;
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  padding-left: 2.5rem;
  padding-bottom: 2.25rem;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: .35rem;
  top: .4rem;
  width: .85rem; height: .85rem;
  border-radius: 50%;
  background-color: var(--body-color);
  border: 2px solid var(--border);
  transition: border-color .2s;
}

.timeline__item--active .timeline__dot {
  background-color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.timeline__period {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
  letter-spacing: .02em;
  margin-bottom: .35rem;
}

.timeline__role {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--title-color);
  font-family: var(--font-display);
  margin-bottom: .2rem;
}

.timeline__company {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: .5rem;
}

.timeline__note {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.55;
  max-width: 52ch;
  margin-bottom: .75rem;
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-top: .25rem;
}

.timeline__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  background-color: var(--body-color);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: .15rem .6rem;
}

/*=============== EXPERIENCE & EDUCATION LAYOUT ===============*/
.qualification__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

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

.qual-section__title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

/*=============== SERVICES ===============*/
.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .services__grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .services__grid { grid-template-columns: 1fr 1fr 1fr; }
}

.service-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color .25s, box-shadow .25s;
}

.service-card:hover {
  border-color: var(--accent-border);
  box-shadow: 0 8px 32px var(--accent-soft);
}

.service-card__icon {
  width: 2.75rem; height: 2.75rem;
  background-color: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--accent);
}

.service-card__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--title-color);
}

.service-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

/*=============== PROJECTS ===============*/
.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .projects__grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .projects__grid { grid-template-columns: repeat(3, 1fr); }
}

.project-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .25s, box-shadow .25s, transform .25s;
}

.project-card:hover {
  border-color: var(--accent-border);
  box-shadow: 0 12px 40px var(--accent-soft);
  transform: translateY(-3px);
}

.project-card__thumb {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}

.project-card:hover .project-card__thumb img { transform: scale(1.04); }

.project-card__thumb-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--surface) 0%, var(--accent-soft) 100%);
  color: var(--accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
}

.project-card__thumb-placeholder i { font-size: 2rem; }

.project-card__thumb-placeholder--logo img {
  width: 3rem;
  height: auto;
  object-fit: contain;
}

.project-card__thumb-placeholder--logo-md img {
  width: 6rem;
}

.project-card__thumb-placeholder--logo-lg img {
  width: 10rem;
}

.dark-theme .project-card__thumb-placeholder--logo img {
  filter: invert(1);
}

.dark-theme .project-card__thumb-placeholder--logo-retain-colors img {
  filter: none;
}

.project-card__body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.project-card__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
}

.project-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.project-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: .5rem;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  color: var(--accent);
  transition: gap .2s;
}
.project-card__link:hover { gap: .6rem; }

/*=============== RESEARCH / PUBLICATION ===============*/
.pub-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color .25s;
}
.pub-card:hover { border-color: var(--accent-border); }

.pub-card__quote {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--title-color);
  line-height: 1.4;
  font-style: italic;
}

.pub-card__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.pub-card__doi {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/*=============== CONTACT ===============*/
.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .contact__grid { grid-template-columns: 1fr 1.5fr; }
}

.contact-info__title {
  font-size: var(--fs-lg);
  margin-bottom: 1rem;
}

.contact-info__list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-info__item {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.contact-info__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
}

.contact-info__value {
  font-size: var(--fs-sm);
  color: var(--title-color);
}

.contact-info__link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--accent);
  transition: gap .2s;
}
.contact-info__link:hover { gap: .6rem; }

/* Contact form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.form__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
}

.form__input,
.form__textarea {
  width: 100%;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: .85rem 1rem;
  font-size: var(--fs-sm);
  font-family: var(--font-body);
  color: var(--title-color);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

.form__submit {
  align-self: flex-start;
}

.contact__message {
  font-size: var(--fs-sm);
  margin-top: .25rem;
}

.color-red   { color: hsl(4, 71%, 50%); }
.color-blue  { color: hsl(207, 56%, 45%); }

/*=============== FOOTER ===============*/
.footer {
  padding-block: 3rem;
  border-top: 1px solid var(--border);
  margin-top: 4rem;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer__logo {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--title-color);
  letter-spacing: -.01em;
}

.footer__tagline {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

.footer__nav-link {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color .2s;
}
.footer__nav-link:hover { color: var(--title-color); }

.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__social-link {
  width: 2.25rem; height: 2.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  color: var(--text-muted);
  transition: border-color .2s, color .2s;
}
.footer__social-link:hover { border-color: var(--accent-border); color: var(--accent); }

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/*=============== SCROLL UP ===============*/
.scrollup {
  position: fixed;
  right: 1.5rem;
  bottom: -50%;
  width: 2.5rem; height: 2.5rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--title-color);
  z-index: var(--z-tooltip);
  transition: bottom .3s, transform .2s, border-color .2s;
}
.scrollup:hover { transform: translateY(-3px); border-color: var(--accent-border); }
.show-scroll { bottom: 2rem; }