@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');


/* =========================================================
   THEME SYSTEM
   ========================================================= */

/*
   Six intentionally distinct visual themes.

   Midnight   = default, deep blue-black
   Graphite   = neutral charcoal
   Dusk       = indigo / muted purple
   Paper      = soft neutral light
   Parchment  = warm ivory / literary
   Sage       = muted green-grey
*/


/* ---------------------------------------------------------
   Midnight — DEFAULT
   Deep blue-black, cool, technical, academic.
   --------------------------------------------------------- */

:root,
html[data-theme="midnight"] {
  color-scheme: dark;

  --bg: #0b1220;
  --surface: #111a2b;
  --surface-raised: #172235;

  --text: #d7e1eb;
  --heading: #f1f5f9;
  --muted: #8fa1b5;

  --link: #7db7ff;
  --link-hover: #a9d0ff;

  --accent: #5ea7ff;
  --accent-hover: #8bc1ff;

  --border: #26364d;
  --border-strong: #344962;

  --nav-bg: #0e1726;
  --nav-border: #26364d;

  --code-bg: #0a101b;

  --shadow: rgba(0, 0, 0, 0.28);
  --shadow-hover: rgba(0, 0, 0, 0.42);
}


/* ---------------------------------------------------------
   Graphite
   Neutral charcoal, understated and monochrome.
   --------------------------------------------------------- */

html[data-theme="graphite"] {
  color-scheme: dark;

  --bg: #151719;
  --surface: #1d2023;
  --surface-raised: #25292d;

  --text: #d4d7da;
  --heading: #f0f1f2;
  --muted: #969ba1;

  --link: #c3c9cf;
  --link-hover: #ffffff;

  --accent: #b8c0c8;
  --accent-hover: #e1e5e8;

  --border: #30353a;
  --border-strong: #41474e;

  --nav-bg: #191b1e;
  --nav-border: #30353a;

  --code-bg: #101214;

  --shadow: rgba(0, 0, 0, 0.32);
  --shadow-hover: rgba(0, 0, 0, 0.48);
}


/* ---------------------------------------------------------
   Dusk
   Dark indigo / muted purple.
   --------------------------------------------------------- */

html[data-theme="dusk"] {
  color-scheme: dark;

  --bg: #171622;
  --surface: #211f30;
  --surface-raised: #2a273b;

  --text: #d9d6e5;
  --heading: #f2eff8;
  --muted: #a19caf;

  --link: #b7a8ff;
  --link-hover: #d1c7ff;

  --accent: #9b8cff;
  --accent-hover: #b8adff;

  --border: #353148;
  --border-strong: #48415e;

  --nav-bg: #1b1928;
  --nav-border: #353148;

  --code-bg: #11101a;

  --shadow: rgba(7, 5, 15, 0.32);
  --shadow-hover: rgba(7, 5, 15, 0.48);
}


/* ---------------------------------------------------------
   Paper
   Soft neutral light mode.
   Deliberately NOT pure white.
   --------------------------------------------------------- */

html[data-theme="paper"] {
  color-scheme: light;

  --bg: #f3f4f2;
  --surface: #e9ebe8;
  --surface-raised: #ffffff;

  --text: #394047;
  --heading: #1f2529;
  --muted: #687178;

  --link: #315f86;
  --link-hover: #214966;

  --accent: #3d718f;
  --accent-hover: #2f5b75;

  --border: #d5d9d5;
  --border-strong: #c3c9c4;

  --nav-bg: #e7e9e6;
  --nav-border: #d1d5d1;

  --code-bg: #e3e6e3;

  --shadow: rgba(31, 37, 41, 0.07);
  --shadow-hover: rgba(31, 37, 41, 0.13);
}


/* ---------------------------------------------------------
   Parchment
   Warm ivory, literary / archival.
   --------------------------------------------------------- */

html[data-theme="parchment"] {
  color-scheme: light;

  --bg: #f2ecdf;
  --surface: #e9e0d0;
  --surface-raised: #f8f3e9;

  --text: #4c443b;
  --heading: #29231d;
  --muted: #766b5e;

  --link: #7b5434;
  --link-hover: #5e3e25;

  --accent: #a46a3f;
  --accent-hover: #80502f;

  --border: #d8ccba;
  --border-strong: #c6b9a5;

  --nav-bg: #e7dece;
  --nav-border: #d1c4b1;

  --code-bg: #e1d7c6;

  --shadow: rgba(65, 48, 31, 0.08);
  --shadow-hover: rgba(65, 48, 31, 0.15);
}


/* ---------------------------------------------------------
   Sage
   Muted green-grey, calm and natural.
   --------------------------------------------------------- */

html[data-theme="sage"] {
  color-scheme: light;

  --bg: #e9eee9;
  --surface: #dfe7e0;
  --surface-raised: #f3f6f3;

  --text: #3c4941;
  --heading: #202c25;
  --muted: #68766d;

  --link: #416b55;
  --link-hover: #2d503e;

  --accent: #527d63;
  --accent-hover: #3d624d;

  --border: #ccd7ce;
  --border-strong: #bac8bd;

  --nav-bg: #dfe7e0;
  --nav-border: #c8d3ca;

  --code-bg: #d8e1d9;

  --shadow: rgba(34, 49, 40, 0.07);
  --shadow-hover: rgba(34, 49, 40, 0.14);
}


/* =========================================================
   BASE
   ========================================================= */

body {
  background-color: var(--bg);
  padding: 25px 50px 50px 50px;
  font: 15px/1.6 "JetBrains Mono", "Fira Code", "SF Mono",
        Monaco, "Cascadia Code", "Roboto Mono", Consolas,
        "Courier New", monospace;
  color: var(--text);
  font-weight: 400;
  margin: 0;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}


h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  margin: 0 0 20px;
  line-height: 1.1;
}

h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 10px;
}

h2 {
  font-size: 28px;
}

h3 {
  color: var(--heading);
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
  margin: 30px 0 20px 0;
}

h4, h5, h6 {
  color: var(--muted);
}

p, ul, ol, table, pre, dl {
  margin: 0 0 20px;
}

ol {
  padding-left: 15px;
}


/* =========================================================
   LINKS
   ========================================================= */

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

a small {
  font-size: 11px;
  color: var(--muted);
  margin-top: -0.3em;
  display: block;
}


/* =========================================================
   LAYOUT
   ========================================================= */

.wrapper {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}


/* =========================================================
   SKIP LINK
   ========================================================= */

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
}


/* =========================================================
   NAVIGATION
   ========================================================= */

.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.main-nav .nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.main-nav .nav-brand {
  font-weight: 700;
  font-size: 16px;
  color: var(--heading);
  text-decoration: none;
}

.nav-brand {
  margin-right: 5px;
  align-items: left;
}

.main-nav .nav-brand:hover {
  color: var(--accent);
}

.main-nav .nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

.main-nav .nav-links a {
  font-size: 14px;
  color: var(--text);
  padding: 4px 8px;
  border-radius: 4px;
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.main-nav .nav-links a:hover {
  background: var(--surface);
  color: var(--accent);
  text-decoration: none;
}

.main-nav .nav-links a.active {
  color: var(--accent);
  font-weight: 600;
}


/* =========================================================
   PROFILE / HEADER
   ========================================================= */

.profile-section {
  text-align: center;
  margin-bottom: 30px;
}

.profile-section .title {
  color: var(--muted);
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 20px 0;
  font-style: italic;
}

.profile-image {
  margin: 20px 0;
}

#face_img {
  width: 280px;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px var(--shadow);
  transition:
    transform 0.3s ease,
    box-shadow 0.2s ease;
}

#face_img:hover {
  transform: scale(1.02);
}

header img:not(#face_img) {
  height: 28px;
  width: auto;
}

header {
  padding-top: 25px;
  width: 270px;
  float: left;
  position: fixed;
  -webkit-font-smoothing: subpixel-antialiased;
}

header h3 {
  margin: 20px 0 10px 0;
}

main {
  padding-top: 25px;
}


/* =========================================================
   CONTENT LINKS / VIEW
   ========================================================= */

.view a {
  display: inline-block;
  margin: 2px 0;
  padding: 4px 8px;
  background: var(--surface);
  border-radius: 6px;
  border: 1px solid var(--border);
  transition:
    background 0.3s ease,
    border-color 0.3s ease,
    transform 0.3s ease;
  font-size: 13px;
}

.view a:hover {
  background: var(--surface-raised);
  border-color: var(--border-strong);
  transform: translateY(-1px);
  text-decoration: none;
}


/* =========================================================
   MAIN SECTIONS
   ========================================================= */

section,
main {
  width: 800px;
  float: right;
  padding-bottom: 50px;
}


/* =========================================================
   PUBLICATIONS
   ========================================================= */

.publication-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 10px 0;
  padding: 25px 15px 25px 8px;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  box-shadow: 0 2px 8px var(--shadow);
  transition:
    background-color 0.2s ease,
    box-shadow 0.3s ease,
    border-left-color 0.3s ease;
}

.publication-item:hover {
  box-shadow: 0 6px 20px var(--shadow-hover);
  border-left-color: var(--accent-hover);
}

.publication-thumbnail {
  margin-right: 16px;
  flex-shrink: 0;
  width: 128px;
  transition: transform 0.3s ease;
  white-space: nowrap;
  text-align: center;
}

.publication-thumbnail:hover {
  transform: scale(1.05);
}

.helper {
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

.publication-thumbnail img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 2px 8px var(--shadow);
  transition: opacity 0.3s ease;
  vertical-align: middle;
}

.publication-content {
  flex: 1;
  min-width: 0;
}


/* =========================================================
   NEWS
   ========================================================= */

.news-list li {
  margin-bottom: 8px;
}


/* =========================================================
   BLOG
   ========================================================= */

.blog-list {
  list-style: none;
  padding: 0;
}

.blog-list li {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.blog-list .excerpt {
  margin-top: 5px;
}

.post-meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 25px;
}

.post-content {
  line-height: 1.7;
}


/* =========================================================
   PROJECTS
   ========================================================= */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-hover);
}

.project-card .project-thumbnail img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.project-card .project-content {
  padding: 15px;
}

.project-card h3 {
  margin: 0 0 10px 0;
}


/* =========================================================
   TAGS
   ========================================================= */

.tag {
  display: inline-block;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  color: var(--muted);
}

.project-tags {
  margin-bottom: 10px;
}


/* =========================================================
   BUTTONS
   ========================================================= */

.btn-cv {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  font-weight: 600;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.btn-cv:hover {
  background: var(--accent-hover);
  color: var(--bg);
  transform: translateY(-1px);
  text-decoration: none;
}


/* =========================================================
   EMAIL COPY
   ========================================================= */

.email-copy {
  cursor: pointer;
  position: relative;
}

.email-copy:hover::after {
  content: "Click to copy";
  position: absolute;
  background: var(--surface-raised);
  color: var(--heading);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  top: -30px;
  left: 0;
  white-space: nowrap;
  z-index: 1000;
}


/* =========================================================
   BLOCKQUOTES
   ========================================================= */

blockquote {
  border-left: 1px solid var(--border-strong);
  margin: 0;
  padding: 0 0 0 20px;
  font-style: italic;
}


/* =========================================================
   CODE
   ========================================================= */

code,
pre {
  font-family:
    Monaco,
    "Bitstream Vera Sans Mono",
    "Lucida Console",
    Terminal,
    Consolas,
    "Liberation Mono",
    "DejaVu Sans Mono",
    "Courier New",
    monospace;
  font-size: 13px;
}

pre {
  padding: 8px 15px;
  background: var(--code-bg);
  color: var(--text);
  border-radius: 5px;
  border: 1px solid var(--border);
  overflow-x: auto;
}


/* Pygments / syntax highlighting */

pre.highlight,
.highlight pre,
.highlight {
  background: var(--code-bg);
}


/* =========================================================
   TABLES
   ========================================================= */

table {
  width: 100%;
  border-collapse: collapse;
}

table th,
table td {
  text-align: left;
  padding: 5px 10px;
  border-bottom: 1px solid var(--border);
}

dt {
  color: var(--heading);
  font-weight: 700;
}

th {
  color: var(--heading);
}


/* =========================================================
   IMAGES
   ========================================================= */

img {
  max-width: 100%;
}


/* =========================================================
   HORIZONTAL RULE
   ========================================================= */

hr {
  border: 0;
  background: var(--border);
  height: 1px;
  margin: 0 0 20px;
}


/* =========================================================
   TEXT EMPHASIS
   ========================================================= */

strong {
  color: var(--heading);
  font-weight: 700;
}

small {
  font-size: 11px;
}


/* =========================================================
   THEME PICKER
   ========================================================= */

.theme-toggle {
  position: fixed;
  top: 60px;
  right: 20px;
  z-index: 200;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 40px;
  height: 40px;
  padding: 0;

  background: var(--nav-bg);
  color: var(--text);
  border: 1px solid var(--nav-border);
  border-radius: 8px;

  cursor: pointer;
  font-size: 18px;

  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle:active {
  transform: scale(0.95);
}

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

.theme-toggle .theme-icon {
  pointer-events: none;
}


/* =========================================================
   THEME MENU
   ========================================================= */

.theme-menu {
  position: fixed;
  top: 108px;
  right: 20px;
  z-index: 199;

  width: 220px;
  padding: 8px;

  background: var(--surface-raised);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;

  box-shadow: 0 12px 35px var(--shadow-hover);

  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);

  transition:
    opacity 0.15s ease,
    visibility 0.15s ease,
    transform 0.15s ease;
}

.theme-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.theme-menu-title {
  padding: 6px 8px 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.theme-option {
  width: 100%;

  display: flex;
  align-items: center;
  gap: 10px;

  padding: 8px;
  border: 0;
  border-radius: 6px;

  background: transparent;
  color: var(--text);

  font: inherit;
  font-size: 13px;
  text-align: left;

  cursor: pointer;

  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.theme-option:hover {
  background: var(--surface);
}

.theme-option.is-active {
  background: var(--surface);
  color: var(--accent);
  font-weight: 600;
}

.theme-option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}


/* Theme swatches */

.theme-swatch {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;

  border-radius: 50%;
  border: 1px solid var(--border-strong);
}

.theme-swatch-midnight {
  background: #0b1220;
}

.theme-swatch-graphite {
  background: #151719;
}

.theme-swatch-dusk {
  background: #171622;
}

.theme-swatch-paper {
  background: #f3f4f2;
}

.theme-swatch-parchment {
  background: #f2ecdf;
}

.theme-swatch-sage {
  background: #e9eee9;
}


/* =========================================================
   FOOTER
   ========================================================= */

.wrapper > p > small {
  display: block;
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}


/* =========================================================
   RESPONSIVE — TABLET
   ========================================================= */

@media print, screen and (max-width: 1200px) {

  .wrapper {
    width: auto;
    margin: 0;
  }

  header,
  section,
  main,
  footer {
    float: none;
    position: static;
    width: auto;
  }

  header {
    margin-top: 10px;
    padding-right: 0;
    margin-bottom: 30px;
  }

  main {
    margin-top: 10px;
  }

  section,
  main {
    border: 1px solid var(--border);
    border-width: 1px 0;
    padding: 20px 0;
    margin: 0 0 20px;
  }

  #face_img {
    width: 200px;
  }

  .main-nav .nav-inner {
    padding: 10px 20px;
  }

  .theme-toggle {
    top: 55px;
    right: 15px;
  }

  .theme-menu {
    top: 103px;
    right: 15px;
  }

  header img:not(#face_img) {
    height: 24px;
    width: auto;
  }
}


/* =========================================================
   RESPONSIVE — SMALL
   ========================================================= */

@media print, screen and (max-width: 720px) {

  body {
    word-wrap: break-word;
  }

  header {
    padding: 0;
  }

  header ul,
  header p.view {
    position: static;
  }

  pre,
  code {
    word-wrap: normal;
  }

  .theme-menu {
    width: 200px;
  }
}


/* =========================================================
   RESPONSIVE — MOBILE
   ========================================================= */

@media print, screen and (max-width: 480px) {

  body {
    padding: 15px;
  }

  .main-nav .nav-inner {
    flex-direction: column;
    gap: 10px;
  }

  .main-nav .nav-links {
    gap: 5px;
    flex-wrap: wrap;
    justify-content: center;
  }

  #face_img {
    width: 160px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 22px;
  }

  .theme-toggle {
    top: 15px;
    right: 15px;
  }

  .theme-menu {
    top: 63px;
    right: 15px;
    width: min(220px, calc(100vw - 30px));
  }
}


/* =========================================================
   PRINT
   ========================================================= */

@media print {

  body {
    padding: 0.4in;
    font-size: 12pt;
    color: #444;
    background: #fff;
  }

  .main-nav,
  .theme-toggle,
  .theme-menu {
    display: none;
  }
}