styles.css

/* =========================================================
   DISSUF · Direction A: "Contour"
   A survey-map look: paper background, ink lines, one
   vermilion survey point. Contour lines are the only
   decoration, and they live in the hero and the dividers.

   Fonts are loaded in _quarto.yml (see the <link> there):
   Space Grotesk  -> headings
   IBM Plex Sans  -> body text
   IBM Plex Mono  -> small "map labels" (subtitle, coordinates)
========================================================= */

:root {
  /* Colours */
  --paper:      #F4F1EA;  /* page background, like map paper   */
  --paper-2:    #EAE5D9;  /* slightly darker paper for bands   */
  --paper-card: #FBF9F4;  /* card surface                      */
  --ink:        #1B2A3A;  /* main text and lines               */
  --ink-2:      #4A5868;  /* secondary text                    */
  --line:       #D6CFBF;  /* hairlines and borders             */
  --accent:     #E4572E;  /* vermilion: survey point, big type */
  --accent-ink: #B23F1A;  /* darker vermilion: readable links  */

  /* Type */
  --font-head: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  /* Shape */
  --radius: 6px;          /* small radius, like a map legend box */
  --measure: 68ch;        /* comfortable reading line length     */
}


/* =========================================================
   BASE
========================================================= */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  background-color: var(--paper);
  color: var(--ink);
  margin: 0;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

p {
  color: var(--ink);
}

main p,
main li {
  max-width: var(--measure);
}

strong {
  font-weight: 600;
}

a {
  color: var(--accent-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--ink);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 3px;
  border-radius: 2px;
}

.text-muted {
  color: var(--ink-2) !important;
}

::selection {
  background: var(--accent);
  color: var(--paper);
}


/* =========================================================
   HEADINGS
========================================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  overflow-wrap: break-word;
}

h1 { font-size: clamp(1.9rem, 1.4rem + 2vw, 2.6rem); }

h2 {
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.85rem);
  margin-top: 3rem;
  margin-bottom: 1rem;
}

h3 { font-size: 1.25rem; margin-top: 2rem; }
h4 { font-size: 1.05rem; }

/* Quarto adds a line under h2 by default; the contour divider replaces it */
h2, .h2 {
  border-bottom: none;
  padding-bottom: 0;
}


/* =========================================================
   HERO / TITLE BLOCK
   The one bold element: big title on paper, with contour
   lines rising on the right and a vermilion survey point.
========================================================= */
.quarto-title-banner,
.title-block-banner,
#title-block-header.quarto-title-block {
  position: relative;
  background-color: var(--paper) !important;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 640 420' preserveAspectRatio='xMaxYMid slice'%3E%3Cg transform='translate(430 210) rotate(0) scale(0.28)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.32' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(436 207) rotate(9) scale(0.55)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(442 204) rotate(18) scale(0.82)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(448 201) rotate(27) scale(1.09)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(454 198) rotate(36) scale(1.36)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.32' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(460 195) rotate(45) scale(1.63)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(466 192) rotate(54) scale(1.90)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(472 189) rotate(63) scale(2.17)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.16' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Cg transform='translate(478 186) rotate(72) scale(2.44)'%3E%3Cpath d='M0,-100 C55,-102 112,-62 106,-4 C101,52 58,97 4,99 C-58,102 -108,58 -101,-2 C-95,-57 -54,-98 0,-100Z' fill='none' stroke='%231B2A3A' stroke-opacity='0.32' stroke-width='1.1' vector-effect='non-scaling-stroke'/%3E%3C/g%3E%3Ccircle cx='432' cy='208' r='4' fill='%23E4572E'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: right center !important;
  background-size: auto 100% !important;
  color: var(--ink) !important;
  border: none !important;
  text-align: left;
}

.quarto-title-banner {
  padding: clamp(3rem, 2rem + 5vw, 6.5rem) 0 clamp(2.5rem, 2rem + 3vw, 4.5rem) !important;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--line) !important;
}

/* Coordinates of the Faculty of Architecture, as a map label */
.quarto-title-banner::after {
  content: "52.006° N  4.370° E";
  position: absolute;
  right: clamp(1rem, 4vw, 3rem);
  bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  letter-spacing: 0.02em;
}

.quarto-title-block .quarto-title h1.title,
.quarto-title-banner h1,
.page-header h1 {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(2.1rem, 1.3rem + 3.4vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink) !important;
  max-width: 17ch;
  margin: 0;
}

.quarto-title-block .subtitle,
.subtitle {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--accent-ink) !important;
  margin-top: 1.25rem;
  margin-bottom: 0;
}

/* Pages with a plain (non-banner) title: no contours, smaller title.
   The #id is needed to outrank the hero rule above. */
#title-block-header.quarto-title-block:not(:has(.quarto-title-banner)) {
  background-image: none !important;
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem) 0 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--line) !important;
}

#title-block-header.quarto-title-block:not(:has(.quarto-title-banner)) h1.title {
  font-size: clamp(1.9rem, 1.4rem + 2vw, 2.6rem);
  max-width: none;
}

#title-block-header.quarto-title-block:not(:has(.quarto-title-banner)) .subtitle {
  margin-top: 0.75rem;
}


/* =========================================================
   INTRO PARAGRAPH  (::: intro in index.qmd)
========================================================= */
.intro {
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.65rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 30ch;
  margin: 1rem 0 2.5rem;
}

.intro p {
  color: inherit;
  max-width: none;
}


/* =========================================================
   NAVBAR
   Flat bar on paper with a hairline underneath.
========================================================= */
.navbar,
#quarto-header .navbar {
  background-color: var(--paper) !important;
  border-bottom: 1px solid var(--line);
  box-shadow: none;
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
}

.navbar-brand,
.navbar-title,
.navbar-brand:hover,
.navbar-title:hover {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--ink) !important;
  text-decoration: none;
}

.navbar .nav-link,
.navbar a {
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-2) !important;
  text-decoration: none;
}

.navbar .nav-link:hover {
  color: var(--ink) !important;
}

/* Active page: a short vermilion underline, like a highlighted route */
.navbar .nav-link.active {
  color: var(--ink) !important;
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* "Contact us" as a small outlined button */
.navbar-nav .nav-link[href*="contact"] {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 0.35rem 0.9rem !important;
  margin-left: 0.75rem;
  color: var(--ink) !important;
  box-shadow: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Mobile menu icon and search icon in ink (defaults are white) */
.navbar-toggler {
  border-color: var(--line);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%231B2A3A' stroke-linecap='round' stroke-width='2' d='M4 8h22M4 15h22M4 22h22'/%3E%3C/svg%3E") !important;
}

.navbar .aa-DetachedSearchButton .aa-DetachedSearchButtonIcon,
.navbar #quarto-search .aa-SubmitIcon {
  color: var(--ink) !important;
}


/* =========================================================
   BUTTONS
   Works for real buttons and for the "::: btn-primary"
   div used in index.qmd.
========================================================= */
.btn-primary,
div.btn-primary {
  display: inline-block;
  background-color: var(--ink);
  border: 1px solid var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 0.6em 1.3em;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

div.btn-primary p {
  margin: 0;
  color: inherit;
}

div.btn-primary a {
  color: var(--paper);
  text-decoration: none;
}

.btn-primary:active {
  transform: translateY(1px);
}


/* =========================================================
   SECTIONS  (::: section-gray / ::: content-wrapper)
========================================================= */
.section-gray {
  background-color: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 3rem 0;
  padding: 0.5rem 0 2.5rem;
}

.content-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-gray h2 {
  margin-top: 2rem;
}


/* =========================================================
   CARDS
   Quiet legend-box cards: no shadow, hairline border.
========================================================= */
.card,
.project-card {
  background-color: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: none;
  padding: 1.5rem;
  color: var(--ink);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.card img {
  display: block;
  margin: 0 auto;
  border-radius: 50%;
  width: 96px;
  height: 96px;
  object-fit: cover;
  border: 1px solid var(--ink);
  filter: grayscale(15%);
}

.card-title {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  margin: 0.4rem 0 0.15rem;
}

.card-text,
.card p {
  font-size: 0.875rem;
  color: var(--ink-2);
  margin: 0.15rem 0;
}


/* =========================================================
   GRIDS
========================================================= */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}


/* =========================================================
   SUPERVISORY TEAM (team page)
========================================================= */
.supervisor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 2rem 0 0;
}

.supervisor-grid > .col {
  width: auto;
  max-width: none;
  padding: 0;
  margin: 0;
}

.supervisor-grid .card {
  height: 100%;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.supervisor-grid .card img {
  margin: 0 0 1rem;
}

.supervisor-grid .card h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  margin-top: 0;
}

.supervisor-grid .card p {
  font-size: 0.875rem;
  line-height: 1.4;
  overflow-wrap: anywhere;  /* long e-mail addresses */
}

.supervisor-grid .card ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
}

.supervisor-grid .card li {
  font-size: 0.85rem;
  line-height: 1.4;
  margin-bottom: 0.3rem;
  color: var(--ink);
}


/* =========================================================
   TEAM CAROUSEL (home page)
========================================================= */
.team-carousel-card {
  max-width: 160px;
  margin: 0 auto;
  padding: 0;
  text-align: center;
}

.team-carousel-card .card-img-top {
  width: 100%;
  height: 130px;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  border: none;
  border-bottom: 1px solid var(--line);
}

.team-carousel-card .card-body {
  padding: 0.75rem 0.75rem 1rem;
}

.team-carousel-card .card-title {
  font-size: 0.85rem;
  line-height: 1.2;
}

.team-carousel-card .card-text {
  font-size: 0.75rem;
  line-height: 1.3;
}

#teamCarousel .row {
  flex-wrap: nowrap;
  justify-content: center;
}

#teamCarousel .carousel-item {
  padding: 2rem 3rem 3rem;
}

/* The prev/next buttons in index.qmd are empty, so draw arrows here
   using the Bootstrap Icons font that Quarto already loads */
#teamCarousel .carousel-control-prev,
#teamCarousel .carousel-control-next {
  width: 2.5rem;
  opacity: 1;
  color: var(--ink);
}

#teamCarousel .carousel-control-prev::before,
#teamCarousel .carousel-control-next::before {
  font-family: "bootstrap-icons";
  font-size: 1.4rem;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
}

#teamCarousel .carousel-control-prev::before { content: "\F284"; }
#teamCarousel .carousel-control-next::before { content: "\F285"; }

#teamCarousel .carousel-indicators {
  margin-bottom: 0.5rem;
}

#teamCarousel .carousel-indicators [data-bs-target] {
  width: 22px;
  height: 3px;
  background-color: var(--ink);
  opacity: 0.25;
  border: none;
}

#teamCarousel .carousel-indicators .active {
  background-color: var(--accent);
  opacity: 1;
}


/* =========================================================
   LISTS, DIVIDERS
========================================================= */
ul li::marker {
  color: var(--accent);
}

ul li strong {
  color: var(--ink);
}

/* Horizontal rules become a single contour line */
hr {
  border: none;
  height: 12px;
  margin: 2.5rem 0;
  opacity: 1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='12' viewBox='0 0 120 12'%3E%3Cpath d='M0 6 C20 0 40 0 60 6 S100 12 120 6' fill='none' stroke='%231B2A3A' stroke-opacity='0.35' stroke-width='1'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: left center;
}


/* =========================================================
   FOOTER
========================================================= */
footer,
.nav-footer,
.nav-footer .container,
.nav-footer .container-fluid {
  background-color: var(--paper-2) !important;
  color: var(--ink-2) !important;
  box-shadow: none !important;
}

.nav-footer {
  border-top: 1px solid var(--line) !important;
  margin: 0 !important;
  padding: 1.25rem 0;
  font-size: 0.85rem;
}

.nav-footer a,
.nav-footer .nav-link {
  color: var(--ink) !important;
}

.quarto-back-to-top {
  background-color: var(--paper) !important;
  color: var(--ink) !important;
  border: 1px solid var(--ink) !important;
  box-shadow: none !important;
}


/* =========================================================
   HOVER (only on devices with a real mouse)
========================================================= */
@media (hover: hover) and (pointer: fine) {
  .card:hover,
  .project-card:hover {
    border-color: var(--ink);
  }

  .btn-primary:hover,
  div.btn-primary:hover {
    background-color: var(--accent-ink);
    border-color: var(--accent-ink);
  }

  .navbar-nav .nav-link[href*="contact"]:hover {
    background-color: var(--ink);
    color: var(--paper) !important;
  }
}


/* =========================================================
   TABLET & PHONE
========================================================= */
@media (max-width: 991.98px) {
  .navbar-nav .nav-link {
    padding: 0.6rem 0.25rem;   /* bigger tap targets */
  }

  .navbar-nav .nav-link[href*="contact"] {
    display: inline-block;
    margin: 0.5rem 0 0.75rem;
  }

  .navbar .nav-link.active {
    box-shadow: inset 2px 0 0 var(--accent);
    padding-left: 0.6rem;
  }
}

@media (max-width: 767.98px) {
  /* Contours fade back so the title stays readable on small screens */
  .quarto-title-banner {
    background-size: auto 85% !important;
    background-position: 140% center !important;
  }

  .quarto-title-banner::after {
    position: static;
    display: block;
    margin-top: 1.5rem;
    padding: 0 1rem;
  }

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

  .card,
  .project-card {
    padding: 1.25rem;
  }

  #teamCarousel .carousel-item {
    padding: 1.5rem 2.25rem 2.75rem;
  }

  #teamCarousel .col-3 {
    flex: 0 0 33.333%;
    max-width: 33.333%;
    padding: 0 0.25rem;
  }

  .team-carousel-card .card-img-top {
    height: 90px;
  }
}


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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}