/*
	Cosmic theme for lindseykwok.com
	Loaded after main.css (the unmodified HTML5 UP "Strongly Typed" template)
	and overrides it. Edit this file, not main.css.
*/

/* ---------- Palette & tokens ---------- */
:root {
  --bg: #0B0D17;
  --purple-dark: #3E274A;
  --purple-mid: #813B82;
  --magenta: #BF4E78;
  --orange: #F29F5A;
  --text-hi: rgba(255,255,255,.92);

  /* path is relative to this CSS file */
  --star-img-url: url('images/starry_background.jpg');

  /* gradient used for rules & borders */
  --cosmic-grad: linear-gradient(90deg,
    var(--purple-dark) 0%,
    var(--purple-mid) 35%,
    var(--magenta) 70%,
    var(--orange) 100%);
}

/* ---------- Print (CV) ---------- */
@media print {
  #header, #nav, #footer { display: none !important; }
  body { color: #000; background: #fff; }
}

/* ---------- Page background: starfield ---------- */
html {
  background-color: var(--bg) !important;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  color: var(--text-hi) !important;
  background-color: var(--bg) !important;
  background-image: var(--star-img-url) !important;
  background-repeat: repeat !important;
  background-size: auto !important;
  background-attachment: fixed !important;
  background-position: center top !important;
}

/* Strip the template's section backgrounds so the starfield shows through */
#page-wrapper, #header, #main, #footer, #content, #sidebar, .post {
  background: transparent !important;
}
#page-wrapper, #header, #main, #footer, .post {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  box-shadow: none !important;
}

/* ---------- Section dividers ---------- */
section + section,
ul.divided li {
  border: 0;
  border-top: 2px solid transparent;
  border-image: var(--cosmic-grad) 1;
  margin: 2rem 0;
}
section + section {
  border-top: 2px solid rgba(255,255,255,.18) !important;
}

/* No rule above the header, thick gradient rule between header and features */
#header,
#header > .container {
  border: 0 !important;
  box-shadow: none !important;
  background-image: none !important;
}
#page-wrapper > section:first-of-type {
  border-top: 0 !important;
  box-shadow: none !important;
}
#page-wrapper > #header + #features {
  border-top: 8px solid transparent !important;
  border-image: var(--cosmic-grad) 1 !important;
}

/* Sidebar: no template rules, thick gradient rule between sections */
#sidebar > section,
#sidebar > article {
  border-top: 0 !important;
  border-bottom: 0 !important;
  box-shadow: none !important;
}
#sidebar > section + section {
  border-top: 8px solid transparent !important;
  border-image: var(--cosmic-grad) 1 !important;
  margin-top: 2rem !important;
  padding-top: 2rem !important;
}

/* ---------- Image frames ---------- */
.image, .image img {
  background: transparent !important;
  border: 3px solid transparent !important;
  border-image: var(--cosmic-grad) 1 fill !important;
  box-shadow: none !important;
}

.image.featured {
  aspect-ratio: 3/2;
  overflow: hidden;
}
.image.featured img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* small rounded photos in sidebars (students, etc.) */
.image img.thumb {
  max-width: 200px;
  height: auto;
  border-radius: 8px;
}

/* ---------- Header ---------- */
#header .container {
  padding-top: 11rem !important;
  padding-bottom: 3.5rem !important;
}

#header h1, #header h1 a {
  color: var(--magenta) !important;
  text-shadow:
    0.04em .09em 0 rgba(62, 39, 74, 0.9),
    0 .24em .45em rgba(0,0,0,.35);
  letter-spacing: .12em;
  text-transform: uppercase;
  border: 0 !important;
}
#header h1 {
  margin-bottom: 3.5rem;
}
#header p,
#nav > ul > li > a > span {
  color: var(--text-hi) !important;
  letter-spacing: .18em;
}
#header p {
  margin-top: 0;
}
#logo + p strong {
  font-size: 1.2rem;
}

/* Homepage hero: logo | name | headshot, in one row until small screens */
#header .hero-head {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3vw, 3rem);   /* gap shrinks on smaller screens */
  flex-wrap: nowrap;
}
.hero-text {
  text-align: center;
  flex: 1 1 auto;
  min-width: 0;
  white-space: normal !important;
}
/* name: one line, responsive size */
.hero-text h1 {
  white-space: nowrap !important;
  font-size: clamp(2.1rem, 4vw, 3.2rem);
}
/* subtitle may wrap */
.hero-text p,
.hero-text p strong {
  white-space: normal !important;
  overflow-wrap: anywhere;
}
.hero-left,
.hero-right {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}
.hero-avatar,
.hero-logo {
  width: clamp(180px, 20vw, 230px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255,255,255,0.6);
  box-shadow: 0 0 10px rgba(0,0,0,0.35);
}
/* stack and shrink on small screens */
@media screen and (max-width: 900px) {
  #header .hero-head {
    flex-direction: column;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  .hero-left,
  .hero-right {
    justify-content: center;
  }
  .hero-avatar,
  .hero-logo {
    width: 170px;
    height: 170px;
  }
  #header .hero-text h1 {
    font-size: 1.8rem;
  }
}

/* ---------- Typography ---------- */
h2, h3 {
  color: var(--magenta) !important;
  text-shadow: 0 0 6px rgba(191, 78, 120, 0.4);
  letter-spacing: 0.05em;
  font-weight: 700;
}
h2 {
  color: var(--orange) !important;
  text-shadow: 0 0 8px rgba(242,159,90,0.4);
}

a, a:visited {
  color: var(--orange) !important;
  text-decoration: none;
  border-bottom: 1px dotted rgba(242,159,90,0.5);
  transition: all 0.25s ease-in-out;
}
a:hover, a:focus {
  color: var(--magenta) !important;
  border-bottom-color: rgba(191,78,120,0.7);
  text-shadow: 0 0 6px rgba(191,78,120,0.4);
}

strong, b {
  color: #ffffff !important;
  font-weight: 700;
  text-shadow: 0 0 6px rgba(255,255,255,0.25);
}
h2 strong, h3 strong {
  color: #ffffff !important;
  text-shadow: 0 0 8px rgba(255,255,255,0.35);
}
p strong {
  color: #ffffff !important;
  text-shadow: 0 0 4px rgba(255,255,255,0.2);
}

/* ---------- Buttons (outline style) ---------- */
.button,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  background: transparent !important;
  color: var(--orange) !important;
  border: 2px solid var(--orange) !important;
  border-radius: 4px;
  padding: 0.7em 1.6em;
  font-weight: 600;
  letter-spacing: 0.05em;
  box-shadow:
    0.04em 0.09em 0 rgba(62, 39, 74, 0.7),
    0 .25em .5em rgba(0, 0, 0, 0.45);
  background-clip: padding-box;
  transition: all 0.3s ease-in-out;
}
.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  color: var(--magenta) !important;
  border-color: var(--magenta) !important;
  box-shadow:
    0 0 8px rgba(191, 78, 120, 0.5),
    0 .35em .7em rgba(0, 0, 0, 0.5);
  transform: translateY(-2px);
}
.button:active,
button:active {
  transform: translateY(0);
  box-shadow: 0 .2em .4em rgba(0,0,0,0.4);
}

ul.actions,
.actions {
  margin-top: 0.75rem !important;
  margin-bottom: 0.75rem !important;
}
ul.actions li {
  margin: 0 0.5rem 0 0 !important;
}

/* ---------- Translucent text card ---------- */
.text-cloud {
  display: inline-block;
  max-width: 1000ch;
  background: rgba(11,13,23,.6);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  box-shadow:
    0 6px 20px rgba(0,0,0,.35),
    0 1px 0 rgba(255,255,255,.04) inset;
  border: 1px solid rgba(255,255,255,.08);
}
.text-cloud a {
  color: var(--orange) !important;
  font-weight: 600;
}
.text-cloud a:hover {
  color: var(--magenta) !important;
}

/* ---------- Homepage: features panel ---------- */
#features {
  background: transparent;   /* template sets #fff */
  border-top: 0 !important;
  box-shadow: none !important;
  background-image: none !important;
  padding: 4rem 2rem;
  width: fit-content;
  margin: 0 auto;
}
#features > .container {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 6px;
  padding: 2rem;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  border-top: 0 !important;
  box-shadow: none !important;
}
#features header h2 {
  color: #666A73 !important;
  text-shadow: 0 0 6px rgba(242, 159, 90, 0.3);
}
#features h2 strong {
  color: var(--magenta) !important;
  text-shadow: 0 0 6px rgba(191, 78, 120, 0.3);
}
#features p {
  color: #55546B;
  line-height: 1.65;
}
#features a:hover {
  text-decoration: underline;
}
#features .button {
  color: var(--purple-mid) !important;
  border: 2px solid var(--purple-mid) !important;
  transition: all 0.25s ease-in-out;
  border-radius: 6px;
}
#features .button:hover {
  background: var(--purple-mid) !important;
  color: #fff !important;
  border-color: var(--purple-mid) !important;
  box-shadow: 0 0 12px rgba(129, 59, 130, 0.5);
}

/* ---------- Homepage: banner ---------- */
#banner {
  background: linear-gradient(rgba(10, 10, 30, 0.4), rgba(10, 10, 30, 0.6)),
              url('../../images/21aefx_galaxy.webp') center / cover no-repeat;
  color: white;
  text-align: center;
  padding: 13rem 0rem;
  border-top: 4px solid transparent;
  border-image: var(--cosmic-grad) 1;
}
#banner > .container:before,
#banner > .container:after {
  opacity: 0.9;
}

/* ---------- Homepage: video thumbnail link ---------- */
.video-thumb {
  position: relative;
  padding-bottom: 42%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
}
.video-thumb a {
  display: block;
  position: relative;
  max-width: 100%;
}
.video-thumb img {
  width: 100%;
  border-radius: 8px;
}
.video-thumb .play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 220%);
  background: rgba(255, 0, 0, 0.6);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
}

/* ---------- Gradient frames for figures & videos ---------- */
.gradient-border {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 6px;
  border-radius: 10px;
  background: linear-gradient(180deg, #1e1e4e, #ff7aa8, #ffae70);
  line-height: 0;
}
.gradient-border img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.gradient-border.video-pair {
  flex-direction: column;
  gap: 10px;
  padding: 10px;
  line-height: 1.2;
  max-width: 900px;
  margin: 0 auto 1.5rem;
}
.gradient-border.video-pair .video-title {
  margin: 0;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 500;
  color: #fff;
}
.gradient-border.video-pair .video-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
/* two videos per row, capped in size */
.gradient-border.video-pair .video-grid video {
  flex: 0 1 48%;
  max-width: 430px;
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}
@media (max-width: 700px) {
  .gradient-border.video-pair .video-grid video {
    flex: 0 1 100%;
    max-width: 100%;
  }
}

/* video with a caption label in the corner */
.video-wrapper {
  position: relative;
  flex: 0 1 48%;
  max-width: 430px;
}
.video-wrapper video {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}
.video-label {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.6);
  color: var(--orange);
  font-size: 1.1rem;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 5px;
  pointer-events: none;
}

/* ---------- Page-specific bits ---------- */

/* research.html section headings */
#JWST_programs { margin-bottom: 1em; }
#projects { margin-bottom: 0.6em; }

/* teaching.html headings */
.teaching-title { margin-bottom: 0.4em; }
.teaching-award {
  color: var(--accent-color);
  font-size: 1.2em;
  font-weight: 600;
}

/* cv.html embedded PDF */
.cv-embed {
  height: 800px;
  overflow: auto;
  border: 1px solid #ddd;
}
.cv-embed iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* aboutme.html portrait */
.about-portrait {
  float: right;
  max-width: 400px;
  height: auto;
  margin: 17px 0 1.5em 1.5em;
  border-radius: 8px;
}

/* cv.html publication list */
.pub-minimal {
  margin: 0;
  padding-left: 1.25rem;
  list-style: decimal;
  line-height: 1.4;
  font-size: 1.1rem;
}
.pub-minimal li {
  margin-bottom: 0.35rem;
}
.pub-minimal a {
  font-weight: normal;
}
.pub-minimal a:hover {
  text-decoration: underline;
}

/* ---------- Footer: contact box ---------- */
.contact-centered {
  max-width: 600px;
  width: 100%;
  margin: 2rem auto;
  text-align: center;
  background: rgba(10, 10, 25, 0.85);
  padding: 2rem 2rem;
  border-radius: 10px;
}
.contact-centered header h2 {
  margin-bottom: 1rem;
}
.contact-centered p {
  color: #ddd;
  font-size: 1.1rem;
  text-align: center;
  margin: 0 auto 1.5rem auto;
  max-width: 550px;
  line-height: 1.6;
}
.contact-centered ul.contact {
  list-style: none;
  padding: 0;
  color: #ccc;
}
.contact-centered ul.contact li {
  margin: 0.5rem 0;
}
.contact-centered a:hover {
  text-decoration: underline;
}