/*
  Based on the Vanilla template by TemplateMo
  https://templatemo.com/tm-526-vanilla
*/

:root {
  --accent: #ff7d27;
  --accent-light: #ff8e43;
  --link: #3cc;
  --panel: rgba(0, 0, 0, 0.55);
  --footer: #282b2f;
  --text: #fff;
}

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

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

body {
  margin: 0;
  font-family: "Open Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: #111;
  overflow-x: hidden;
}

[hidden] {
  display: none !important;
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--link);
}

a:hover,
a:focus {
  color: #ff0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  margin: 0;
}

em.accent,
.hero em,
.paper-authors em {
  color: var(--accent);
  font-weight: 600;
  font-style: normal;
}

.container {
  width: 100%;
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 16px;
}

.line-dec {
  width: 45px;
  height: 3px;
  background-color: var(--accent);
  margin: 18px auto;
}

.primary-button {
  display: inline-block;
  background-color: var(--accent);
  padding: 14px 24px;
  border-radius: 3px;
  text-transform: uppercase;
  font-size: 11px;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.5px;
}

.primary-button:hover,
.primary-button:focus {
  color: #fff;
  background-color: var(--accent-light);
}

/* Full-height photo sections. Fixed backgrounds give the parallax feel on
   desktop; they are switched off on touch devices, where they misbehave. */
.photo-section {
  min-height: 100vh;
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  padding: 12vh 0 8vh;
}

.section-title {
  font-size: 28px;
  font-weight: 600;
  text-transform: uppercase;
  text-align: center;
  letter-spacing: 1px;
}

/*----------
  NAV
----------*/

.site-nav {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  z-index: 100;
  padding: 30px 0;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: right;
}

.site-nav a {
  position: relative;
  display: block;
  min-height: 32px;
  padding: 5px 45px 5px 25px;
  color: #fff;
  text-decoration: none;
}

/* The dot */
.site-nav a::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 20px;
  margin-top: -5px;
  width: 10px;
  height: 10px;
  border-radius: 10px;
  background: rgba(250, 250, 250, 0.75);
  transition: transform 0.3s;
  transform: scale(0.6);
}

/* Ring around the dot for the current section */
.site-nav a.active::after {
  transform: scale(0.9);
}

.site-nav a.active::before {
  content: "";
  position: absolute;
  top: 50%;
  right: 17px;
  margin-top: -8px;
  width: 16px;
  height: 16px;
  border: 2px solid #fff;
  border-radius: 10px;
}

.site-nav span {
  display: none;
}

.site-nav:hover span,
.site-nav a:focus span {
  display: block;
  color: rgba(0, 0, 0, 0.6);
  background-color: #fff;
  text-align: center;
  text-transform: uppercase;
  font-size: 12px;
  padding: 2px 12px;
  border-radius: 15px;
}

.site-nav a:hover span {
  color: #000;
}

/*----------
  HERO
----------*/

.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-image: url(../img/mw.jpg);
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  padding: 0 16px;
}

.hero h1 {
  font-size: 72px;
  font-weight: 600;
  text-transform: uppercase;
  overflow-wrap: break-word;
}

.hero .subtitle {
  display: block;
  font-weight: 300;
  font-size: 48px;
}

/*----------
  ABOUT
----------*/

.about {
  /* Slight darkening keeps white text readable over the bright sky */
  background-image: linear-gradient(rgba(0, 0, 0, 0.25), rgba(0, 0, 0, 0.25)), url(../img/palomar.jpg);
}

.bio {
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 30px;
  align-items: start;
}

.bio img {
  width: 60%;
  max-width: 240px;
  margin: 0 auto 20px;
}

.bio h2 {
  font-size: 24px;
  font-weight: 500;
}

.bio .line-dec {
  margin-left: 0;
}

.bio .primary-button {
  margin: 12px 0 0;
}

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

.interest {
  background-color: var(--panel);
  padding: 25px 30px;
  text-align: center;
}

.interest h3 {
  font-size: 18px;
  font-weight: 600;
}

.interest p {
  margin: 0;
}

/*----------
  NEWS
----------*/

.news {
  background: #1b1d21;
  padding: 80px 0;
}

.news-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

.news-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.news-list li:last-child {
  border-bottom: 0;
}

.news-list time {
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding-top: 2px;
}

.news-list p {
  margin: 0;
}

/* Items past the first few are hidden until "Show older news" is pressed */
.news-list.collapsed li.older {
  display: none;
}

.news-more {
  display: block;
  margin: 24px auto 0;
  border: 0;
  cursor: pointer;
  font-family: inherit;
}

/*----------
  RESEARCH
----------*/

.research {
  background-image: url(../img/palomar_night.jpg);
  padding-top: 8vh;
}

.research .container {
  max-width: 1070px;
  text-align: center;
}

.research .section-title {
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

.project-thumb {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transition: opacity 0.3s;
}

.project-thumb:hover,
.project-thumb:focus-visible {
  opacity: 0.7;
}

.project-thumb img,
.project-thumb video {
  width: 100%;
}

.project-caption {
  background-color: var(--panel);
  padding: 25px;
  margin: 20px 0 0;
}

.tabs {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.tabs button {
  display: block;
  font-family: inherit;
  text-transform: uppercase;
  color: #fff;
  background: transparent;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 15px;
  border: 4px solid #fff;
  cursor: pointer;
}

.tabs button:hover {
  color: var(--accent);
}

.tabs button[aria-selected="true"] {
  border-color: var(--accent);
}

/*----------
  PAPER POP-UPS
----------*/

.paper-dialog {
  width: 80%;
  max-width: 1100px;
  max-height: 90vh;
  padding: 0;
  border: 0;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.8);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.paper-dialog[open] {
  animation: dialog-in 0.3s;
}

.paper-dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

.dialog-body {
  padding: 25px 100px 30px;
}

.paper-dialog h2 {
  font-size: 30px;
  font-weight: 500;
  margin: 10px 0 20px;
}

.paper-dialog ol {
  margin: 0 0 1em;
}

.paper-dialog .primary-button {
  margin-top: 10px;
}

/* Sticks to the top corner while scrolling; the negative margin stops it
   taking up its own row above the image */
.dialog-close {
  position: sticky;
  top: 0;
  z-index: 1;
  display: block;
  margin: 0 0 -44px auto;
  width: 44px;
  height: 44px;
  border: 0;
  background: rgba(0, 0, 0, 0.5);
  color: #ccc;
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
}

.dialog-close:hover,
.dialog-close:focus-visible {
  color: #fff;
}

body.dialog-open {
  overflow: hidden;
}

@keyframes dialog-in {
  from {
    transform: translateY(-40px);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}

/*----------
  FOOTER
----------*/

footer {
  text-align: center;
  background-color: var(--footer);
  padding: 70px 0;
}

footer .primary-button {
  margin-bottom: 30px;
}

footer p {
  font-size: 12px;
  margin: 15px 0 0;
  letter-spacing: 0.5px;
}

.social {
  list-style: none;
  margin: 15px 0 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.social a {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent);
  color: var(--footer);
  border-radius: 50%;
  text-decoration: none;
  transition: background-color 0.3s;
  font-size: 18px;
}

.social a:hover {
  color: var(--footer);
  background-color: var(--accent-light);
}

footer em {
  color: var(--accent-light);
  font-weight: 600;
  font-style: normal;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/*----------
  TABLET
----------*/

@media (max-width: 991px) {
  .hero h1 {
    font-size: 56px;
  }

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

  .bio {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
  }

  .bio .line-dec {
    margin-left: auto;
  }

  .dialog-body {
    padding: 20px 40px 30px;
  }
}

/*----------
  PHONE
----------*/

@media (max-width: 767px) {
  body {
    padding-top: 48px;
  }

  /* Side dots become a bar of text links along the top */
  .site-nav {
    top: 0;
    left: 0;
    right: 0;
    transform: none;
    padding: 0;
    background: rgba(20, 22, 26, 0.92);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
  }

  .site-nav ul {
    display: flex;
    justify-content: space-around;
    text-align: center;
  }

  .site-nav a {
    min-height: 48px;
    padding: 14px 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.75);
  }

  .site-nav a::after,
  .site-nav a.active::before {
    display: none;
  }

  .site-nav span,
  .site-nav:hover span,
  .site-nav a:focus span {
    display: inline;
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
  }

  .site-nav a.active {
    color: var(--accent);
  }

  .hero {
    min-height: calc(100vh - 48px);
    min-height: calc(100svh - 48px);
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero .subtitle {
    font-size: 22px;
    margin-top: 8px;
  }

  .photo-section,
  .hero {
    background-attachment: scroll;
  }

  .photo-section {
    min-height: 0;
    padding: 50px 0;
  }

  [id] {
    scroll-margin-top: 48px;
  }

  .interests {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .interest {
    padding: 20px;
  }

  .section-title {
    font-size: 24px;
  }

  .news {
    padding: 50px 0;
  }

  .news-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .project-caption {
    padding: 16px;
  }

  .tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .tabs button {
    width: 100%;
    height: 100%;
    font-size: 12px;
    padding: 8px;
    border-width: 3px;
  }

  .paper-dialog {
    width: 100%;
    max-width: 100%;
    height: 100%;
    max-height: 100%;
    background-color: rgba(0, 0, 0, 0.94);
  }

  .dialog-body {
    padding: 8px 16px 30px;
  }

  .paper-dialog h2 {
    font-size: 22px;
  }

  .paper-dialog ol {
    padding-left: 20px;
  }

  footer {
    padding: 50px 0;
  }
}

/* Very narrow phones: tighten the nav bar so all five links fit */
@media (max-width: 380px) {
  .site-nav a {
    padding-left: 2px;
    padding-right: 2px;
    font-size: 11px;
    letter-spacing: 0;
  }
}

/* iOS ignores fixed backgrounds and scales them badly; use normal ones on touch screens */
@media (hover: none) {
  .photo-section,
  .hero {
    background-attachment: scroll;
  }
}

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

  .paper-dialog[open] {
    animation: none;
  }
}