/* =====================================================
   Variables
   ===================================================== */
:root {
  --red: #ff4b4b;
  --text: #111;
  --muted: #666;
  --bg: #fff;

  --page-pad: clamp(12px, 2vw, 22px);
  --card-pad-sm: 12px 18px;
  --card-pad-lg: clamp(28px, 4vw, 48px);

  --container-max: 1200px;
  --container-pad: var(--page-pad);

  --radius-pill: 999px;
  --radius-card: 32px;
  --shadow-nav: 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.06);
}

/* =====================================================
   Reset / Base
   ===================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html.page-home,
html.page-contact {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #fff;
  color: var(--text);
}

/* =====================================================
   Layout Utilities
   ===================================================== */
.container {
  width: min(100% - (2 * var(--container-pad)), var(--container-max));
  margin-inline: auto;
}

/* =====================================================
   Components: Topbar / Navbar
   ===================================================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--page-pad);
  background: transparent;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: var(--card-pad-sm);
  background: var(--bg);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-nav);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}

.logo-dot {
  display: inline-block;
  width: 34px;
  height: 34px;
  background: var(--red);
  border-radius: 50%;
}

.brand-text strong {
  font-size: 16px;
  line-height: 1;
  letter-spacing: 0.5px;
}

.brand-text small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 1.5px;
}

.links {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  gap: 26px;
}

.link {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-decoration: none;
  opacity: 0.9;
  border-radius: 12px;
  cursor: pointer;
  transition: color 0.3s ease, opacity 0.3s ease;
}

.link:hover,
.link:focus-visible {
  color: var(--red);
  opacity: 1;
  background: transparent;
  outline: none;
}

.contact {
  padding: 10px 16px;
  color: var(--red);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--red);
  border-radius: var(--radius-pill);
  background: transparent;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.contact:hover {
  color: #fff;
  background-color: var(--red);
  border-color: var(--red);
}

.menu-toggle {
  display: none;
  padding: 10px 12px;
  color: var(--text);
  font-size: 22px;
  line-height: 1;
  background: transparent;
  border: 0;
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

/* =====================================================
   Components: Buttons / Links
   ===================================================== */
.hero-buttons {
  display: flex;
  gap: 14px;
}

.btn {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-pill);
}

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

.btn.outline {
  color: var(--red);
  border: 2px solid var(--red);
}

.cv-link,
.cv-link:link,
.cv-link:visited {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 16px;
  color: var(--red);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-decoration: none;
  background: transparent;
  border: 2px solid var(--red);
  border-radius: var(--radius-pill);
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.cv-link:hover,
.cv-link:focus-visible {
  color: #fff;
  background-color: var(--red);
  outline: none;
  transform: translateY(-1px);
}

.pub-link {
  color: inherit;
  font-size: 0.9em;
  text-decoration: underline;
}

#project3 .pub-link,
#project3 .pub-link:visited,
#project4 .pub-link,
#project4 .pub-link:visited {
  color: #000;
}

.pub-link:hover {
  opacity: 0.7;
}

/* =====================================================
   Components: Footer
   ===================================================== */
.site-footer {
  margin-top: 120px;
  padding-bottom: 40px;
  color: #9a9a9a;
  font-size: 0.9rem;
  text-align: center;
}

.footer-divider {
  width: 100%;
  height: 1px;
  margin-bottom: 40px;
  background: #e0e0e0;
}

.footer-text {
  margin-bottom: 24px;
}

.footer-social-box {
  position: relative;
  z-index: 10;
  display: inline-flex;
  gap: 24px;
  padding: 14px 28px;
  background: #f2f2f2;
  border-radius: 4px;
}

.footer-social-box a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--red);
  font-size: 1.2rem;
  text-decoration: none;
  cursor: pointer;
  pointer-events: auto;
}

.footer-social-box a:hover {
  opacity: 0.7;
}

.footer-social-box a i {
  pointer-events: none;
}

/* =====================================================
   Home Page
   ===================================================== */
.hero {
  padding: var(--page-pad);
  padding-top: 16px;
  padding-bottom: 20px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: stretch;
  padding: var(--card-pad-lg);
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.hero-text h1 {
  margin: 0 0 30px;
  font-size: clamp(42px, 4vw, 72px);
  line-height: 1.05;
}

.hero-text p {
  margin-bottom: 30px;
  color: #939393ff;
  font-size: 16px;
}

.hero-visuals {
  display: flex;
  align-items: stretch;
  align-self: stretch;
}

.hero-animation {
  display: flex;
  flex: 1;
  align-self: stretch;
  overflow: hidden;
  border-radius: 24px;
}

.hero-animation img {
  display: block;
  flex: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.services {
  padding: var(--page-pad);
  padding-top: 0;
  padding-bottom: 80px;
}

.services-inner {
  padding-inline: var(--card-pad-lg);
}

.services-inner h2 {
  margin-bottom: 40px;
  font-size: 36px;
  font-weight: 700;
}

.services-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.services-content p {
  color: #939393ff;
  font-size: 18px;
  line-height: 1.6;
  text-align: justify;
}

.background-figures {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(12px, 3vw, 40px);
  margin-top: 28px;
}

.bg-figure {
  display: grid;
  place-items: center;
  height: clamp(120px, 16vw, 180px);
  color: rgba(0, 0, 0, 0.45);
  letter-spacing: 3px;
  background: transparent;
  border-radius: 16px;
}

.bg-figure > picture {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.bg-figure-icon {
  display: block;
  width: auto;
  max-width: 100%;
  height: 68%;
  object-fit: contain;
}

.about {
  padding: var(--page-pad);
  padding-top: 120px;
  padding-bottom: 80px;
}

.about-inner {
  display: grid;
  grid-template-columns: 1.7fr 0.7fr;
  gap: 0;
  overflow: hidden;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.about-text {
  padding: var(--card-pad-lg);
}

.about-text h2 {
  margin: 0 0 18px;
  font-size: 44px;
}

.about-text p {
  max-width: 62ch;
  margin: 0 0 18px;
  color: #939393ff;
  font-size: 16px;
  line-height: 1.7;
  text-align: justify;
}

.about-figure {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: clamp(130px, 22vw, 180px);
  margin: 0;
}

.about-figure > picture {
  display: block;
  width: 100%;
  height: 100%;
}

.about-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-placeholder {
  display: grid;
  flex: 1;
  place-items: center;
  color: rgba(0, 0, 0, 0.5);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 3px;
  background: linear-gradient(135deg, #d9d9d9, #f2f2f2);
}

/* =====================================================
   Research Page
   ===================================================== */
.hero.hero-research .hero-inner {
  display: block !important;
}

.hero.hero-research .hero-text.hero-research-box {
  width: 100% !important;
  max-width: 100% !important;
  text-align: center;
  flex: none !important;
}

.hero.hero-research .hero-text.hero-research-box p {
  text-align: justify;
}

.project {
  margin-top: 0.75rem;
}

.about.project {
  padding-top: 10px;
  padding-bottom: 10px;
}

.about.project .project-card {
  display: flex !important;
  flex-direction: column;
  gap: 0;
  overflow: hidden;
}

.about.project .project-card .project-media {
  width: 100%;
  height: 360px;
  margin: 0;
}

.about.project .project-card .project-media > picture,
#project4 .project-media > picture {
  display: block;
  width: 100%;
  height: 100%;
}

.about.project .project-card .project-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.about.project .project-card .project-body {
  width: 100%;
  max-width: none;
  padding: var(--card-pad-lg);
}

.about.project .project-card .project-body p {
  max-width: none;
}

/* Keep project titles visually consistent across cards (projects 1–4). */
.about.project .project-card .project-body h2,
#project4 .project-body h2 {
  margin: 0 0 0.83em;
  font-size: 1.5em;
  font-weight: 700;
  letter-spacing: normal;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

#project1 .project-body p,
#project2 .project-body p,
#project3 .project-body p {
  color: #939393ff;
  text-align: justify;
}

#project1 .project-media {
  height: 300px;
}

#project2 .project-media {
  height: 360px;
}

#project3 .project-media {
  height: 240px;
}

.project-media {
  width: 100%;
  aspect-ratio: 3 / 4;
}

#project4 .project-media {
  aspect-ratio: auto;
  max-width: none;
  height: 100%;
  margin: 0;
}

#project4 .project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#project4 .project-card {
  display: grid !important;
  grid-template-columns: 1.5fr 0.9fr;
  align-items: stretch;
}

#project4 .project-body p {
  margin: 0 0 18px;
  color: #939393ff;
  text-align: justify;
  overflow-wrap: anywhere;
  word-break: normal;
}

#project4 .project-body {
  text-align: justify;
}

.project-links {
  margin-top: 0.6rem;
  font-size: 0.9rem;
}

.project-links-pubs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
}

.project-links a {
  color: #000;
  font-weight: 500;
  text-decoration: underline;
}

.project-links a i {
  margin-right: 0.25rem;
}

.project-links a:hover {
  opacity: 0.75;
}

.project-note a,
.project-note a:visited {
  color: #000;
  text-decoration: underline;
}

.project-note a:hover {
  opacity: 0.7;
}

.closing-quote {
  margin: 4rem 1rem 2rem;
  text-align: center;
}

.quote-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
}

.quote-greek,
.quote-english {
  color: var(--red);
  font-size: 1.1rem;
  font-style: italic;
  letter-spacing: 0.02em;
}

.quote-dot {
  color: var(--red);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
}

.quote-author {
  margin-top: 0.6rem;
  color: #777;
  font-size: 0.9rem;
}

/* =====================================================
   Publications Page
   ===================================================== */
.pub-divider {
  width: 100%;
  height: 2px;
  margin: 1.5rem 0;
  background-color: #000;
  border: none;
}

.pub-section-title {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
}

.pub-list li {
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.pub-link {
  margin-right: 0.75rem;
}

.hero.hero-publications .hero-inner {
  display: block !important;
  align-items: initial !important;
  grid-template-columns: 1fr !important;
}

.hero.hero-publications .hero-text,
.hero.hero-publications .hero-publications-box {
  width: 100% !important;
  max-width: 100% !important;
  flex: none !important;
}

.hero.hero-publications .hero-publications-box > h1,
.hero.hero-publications .hero-publications-box > p,
.hero.hero-publications .hero-publications-box > h2 {
  text-align: center;
}

.hero.hero-publications .pub-list {
  text-align: left;
}

.hero.hero-publications .hero-publications-box a {
  color: #000;
  text-decoration: underline;
}

.hero.hero-publications .hero-publications-box a:hover {
  opacity: 0.7;
}

/* =====================================================
   Contact Page
   ===================================================== */
.hero.hero-contact .hero-inner {
  display: block !important;
}

.hero.hero-contact .hero-text.hero-contact-box {
  width: 100% !important;
  max-width: 100% !important;
  flex: none !important;
}

.hero.hero-contact .contact-grid {
  width: 100%;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
  gap: 3rem;
}

.hero-contact-box {
  max-width: 100%;
}

.contact-form-column {
  margin-top: 0.5rem;
}

.contact-form {
  margin-top: 2rem;
  text-align: left;
}

.contact-label {
  display: block;
  margin: 1.25rem 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.contact-input,
.contact-textarea {
  width: 100%;
  padding: 1rem 1.1rem;
  font-size: 1.05rem;
  color: #939393ff;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 14px;
  outline: none;
}

.contact-input::placeholder,
.contact-textarea::placeholder {
  color: #939393ff;
}

.contact-textarea {
  min-height: 160px;
  resize: vertical;
}

.contact-input:focus,
.contact-textarea:focus {
  border-color: rgba(0, 0, 0, 0.35);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.18);
}

.contact-submit {
  margin-top: 1.5rem;
  padding: 0.95rem 1.25rem;
  color: #fff;
  font-weight: 700;
  background: #000;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.contact-submit:hover {
  opacity: 0.85;
}

.contact-note {
  margin-top: 0.9rem;
  font-size: 0.95rem;
  opacity: 0.85;
}

.contact-note a {
  color: inherit;
  text-decoration: underline;
}

.contact-social {
  margin-top: 1.5rem;
}

.contact-social-icons {
  display: flex;
  gap: 1.2rem;
  margin-top: 0.6rem;
  font-size: 1.4rem;
}

.contact-social-icons a {
  color: #000;
  text-decoration: none;
}

.contact-social-icons a:hover {
  opacity: 0.7;
}

.contact-text-column a {
  color: #000;
  text-decoration: none;
}

.contact-text-column a:hover {
  text-decoration: underline;
  opacity: 0.7;
}

.contact-justify {
  text-align: justify;
}

/* =====================================================
   Dark Mode
   ===================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --red: #ff4b4b;
    --text: #fff;
    --muted: #c6cada;
    --bg: #0d0d0dff;
    --shadow-nav: 0 6px 18px rgba(0, 0, 0, 0.45);
    --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.4);
  }

  body {
    background: #000;
    color: var(--text);
  }

  .hero-inner,
  .about-inner,
  .nav,
  .footer-social-box {
    background: var(--bg);
  }

  .hero-text p,
  .services-content p,
  .about-text p,
  .project-links a,
  .project-note a,
  .project-note a:visited,
  #project3 .pub-link,
  #project3 .pub-link:visited,
  #project4 .pub-link,
  #project4 .pub-link:visited,
  .hero.hero-publications .hero-publications-box a,
  .contact-social-icons a,
  .contact-text-column a {
    color: var(--text);
  }

  .services-content p {
    color: #939393ff;
  }

  .hero-text p {
    color: #939393ff;
  }

  .about-text p {
    color: #939393ff;
  }

  .brand,
  .brand-text small,
  .link,
  .menu-toggle,
  .contact {
    color: #fff;
  }

  .contact {
    border-color: #939393ff;
  }

  .hero-text h1,
  .services-inner h2,
  .about-text h2,
  .about.project .project-card .project-body h2,
  #project4 .project-body h2,
  .hero.hero-publications .hero-publications-box > h1,
  .hero.hero-publications .hero-publications-box > h2,
  .hero.hero-contact .hero-text.hero-contact-box h1 {
    color: #fff;
  }

  .site-footer,
  .quote-author {
    color: rgba(255, 255, 255, 0.78);
  }

  .bg-figure,
  .figure-placeholder {
    color: rgba(255, 255, 255, 0.62);
  }

  .footer-divider {
    background: rgba(255, 255, 255, 0.22);
  }

  .pub-divider {
    background-color: rgba(255, 255, 255, 0.38);
  }

  .contact-input,
  .contact-textarea {
    color: #939393ff;
    background: #e6e6e6;
    border-color: rgba(255, 255, 255, 0.22);
  }

  .contact-input::placeholder,
  .contact-textarea::placeholder {
    color: #939393ff;
  }

  .contact-input:focus,
  .contact-textarea:focus {
    border-color: rgba(255, 255, 255, 0.42);
    box-shadow: 0 0 0 3px rgba(0, 51, 160, 0.35);
  }

  .contact-submit {
    background: var(--red);
  }
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    padding: var(--card-pad-lg);
  }

  .hero-visuals {
    height: 320px;
  }

  .services-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .services-inner h2 {
    font-size: 32px;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-text {
    padding: var(--card-pad-lg);
  }

  .about-figure {
    min-height: 180px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 22px;
  }

  .brand {
    order: 1;
  }

  .menu-toggle {
    display: inline-flex;
    order: 2;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  .contact {
    order: 3;
    margin-left: auto;
    padding: 8px 12px;
  }

  .links {
    display: none;
    flex: 0 0 100%;
    flex-direction: column;
    order: 4;
    align-items: stretch;
    gap: 8px;
    margin-top: 6px;
    padding: 14px 6px 6px;
  }

  .links.is-open {
    display: flex;
  }

  .links .link {
    display: block;
    width: 100%;
    padding: 12px 14px;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-align: left;
    opacity: 1;
    border-radius: 14px;
  }

  .links .link:hover,
  .links .link:focus-visible {
    color: var(--red);
    background: transparent;
  }

  #project4 .project-card {
    display: flex !important;
    flex-direction: column;
  }

  #project4 .project-media {
    order: -1;
    height: 260px;
  }

  .background-figures {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 22px;
  }

  .bg-figure {
    height: auto;
    min-height: 0;
    padding-block: 4px;
  }

  .bg-figure-icon {
    width: 40vw;
    max-width: 100%;
    height: auto;
  }
}

@media print {
  body {
    background: #fff;
  }

  .topbar {
    position: static;
    padding: 0;
  }

  .nav {
    box-shadow: none;
  }

  section {
    page-break-inside: avoid;
  }

  .hero,
  .services,
  .about {
    padding: 0;
  }

  .hero-animation {
    display: none;
  }
}