/* ============================================================
   THEME — change colours and fonts here.
   ============================================================ */
:root {
  /* Colours: "Deep Space Violet" */
  --color-bg: #0b1024;            /* page background (deep navy) */
  --color-surface: #111734;       /* card background */
  --color-surface-hover: #151c3f; /* card background on hover */
  --color-border: #20294f;        /* card borders, dividers */
  --color-border-hover: #333f78;
  --color-text: #eceafb;          /* main text (off-white) */
  --color-text-muted: #9ca1c6;    /* secondary text */
  --color-text-faint: #4b5280;    /* decorative lines only (low contrast) */
  --color-accent: #a78bfa;        /* violet accent */
  --color-accent-soft: rgba(167, 139, 250, 0.12); /* accent at 12% — update with --color-accent */
  --color-accent-ink: #140b2e;    /* text on top of the accent colour */

  /* Background effects */
  --glow-1: rgba(150, 110, 250, 0.26);     /* violet glow, top left */
  --glow-2: rgba(34, 211, 238, 0.09);      /* cyan glow, bottom right */
  --grid-dot: rgba(196, 181, 253, 0.15);   /* dot grid colour */
  --color-accent-glow: rgba(167, 139, 250, 0.75); /* neon glow on nav line, button, markers */
  --cursor-glow: rgba(240, 238, 255, 0.05); /* light that follows the mouse */

  /* Fonts */
  --font-heading: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Sizing */
  --radius: 10px;
  --radius-sm: 6px;
  --gutter: 1.5rem;
  --sidebar-breakpoint: 1024px; /* reference only — media queries below use 1024px */
}

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

html {
  -webkit-text-size-adjust: 100%;
  scrollbar-gutter: stable; /* page doesn't jump sideways when the gallery locks scrolling */
}

/* Set by main.js while the gallery pop-up is open. */
html.modal-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Background effects: two soft static glows, then a faint dot grid that fades
   out from the top-left corner. Both are fixed layers, so scrolling costs nothing. */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  z-index: -2;
  background:
    radial-gradient(64rem 44rem at 0% 0%, var(--glow-1), transparent 70%),
    radial-gradient(50rem 36rem at 105% 110%, var(--glow-2), transparent 65%);
}

body::after {
  z-index: -1;
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 70% 65% at 0% 0%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 65% at 0% 0%, #000 25%, transparent 75%);
}

/* Soft light that follows the mouse (created by main.js on mouse devices only).
   It moves with transform, so the browser never has to repaint the page. */
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 5;
  width: 700px;
  height: 700px;
  margin: -350px 0 0 -350px;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--cursor-glow), transparent);
  pointer-events: none;
  opacity: 0;
  transition: opacity 400ms ease;
  will-change: transform;
}

.cursor-glow.is-visible {
  opacity: 1;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-heading);
  line-height: 1.2;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

a {
  color: var(--color-text);
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

main:focus {
  outline: none;
}

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

/* Hidden visually, still read by screen readers. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Skip link
   ============================================================ */
.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* ============================================================
   Layout — mobile first (single column)
   ============================================================ */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.sidebar {
  padding: 4rem 0 2rem;
}

main {
  padding-bottom: 3rem;
}

/* ============================================================
   Sidebar / header
   ============================================================ */
.intro-name {
  font-size: clamp(2.5rem, 7vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

/* Name fades from the text colour into the accent. */
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .intro-name {
    width: fit-content; /* gradient spans the name, not the whole column */
    background: linear-gradient(100deg, var(--color-text) 35%, var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.intro-headline {
  margin-top: 0.75rem;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
}

.intro-tagline {
  max-width: 22rem;
  margin-top: 1rem;
  white-space: pre-line; /* a "\n" in the tagline in data.js starts a new line */
}

/* Section nav: hidden on small screens, where sticky section titles take over. */
.section-nav {
  display: none;
}

.sidebar-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.5rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 0 20px -6px var(--color-accent-glow);
  transition: background-color 150ms ease, color 150ms ease, box-shadow 150ms ease;
}

.button:hover {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  box-shadow: 0 0 26px -4px var(--color-accent-glow);
}

.button-icon {
  width: 1.1em;
  height: 1.1em;
}

.socials {
  display: flex;
  gap: 1rem;
}

.socials a {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--color-text-muted);
  transition: color 150ms ease, filter 150ms ease;
}

.socials a:hover {
  color: var(--color-accent);
  filter: drop-shadow(0 0 6px var(--color-accent-glow));
}

.socials svg {
  width: 1.4rem;
  height: 1.4rem;
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding-top: 1rem;
  margin-bottom: 5rem;
  scroll-margin-top: 1rem;
}

/* On mobile the title sticks to the top while you scroll its section. */
.section-title {
  position: sticky;
  top: 0;
  z-index: 10;
  margin: 0 calc(var(--gutter) * -1) 1.5rem;
  padding: 1rem var(--gutter);
  background: var(--color-bg);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--color-text);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.75rem;
  border-radius: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
  vertical-align: 0.1em;
}

.about-text p + p {
  margin-top: 1.1rem;
}

/* ============================================================
   Cards (hackathons + projects)
   ============================================================ */
.card-list {
  display: grid;
  gap: 1.25rem;
}

.card {
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color 200ms ease, background-color 200ms ease, transform 200ms ease;
}

.card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-hover);
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .card:hover {
    transform: translateY(-2px);
  }
}

/* Cards with a thumbnail get two columns on wider screens. */
@media (min-width: 600px) {
  .card.has-media {
    grid-template-columns: 9rem minmax(0, 1fr);
  }
}

.card-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.card-body {
  display: grid;
  gap: 0.85rem;
  min-width: 0;
}

.card-meta {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.card-summary {
  color: var(--color-text);
  font-weight: 500;
}

.card-role strong {
  color: var(--color-text);
  font-weight: 600;
}

.badge {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--color-accent-soft);
  border-color: color-mix(in srgb, var(--color-accent) 35%, transparent);
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.4;
}

.badge svg {
  width: 0.95em;
  height: 0.95em;
  flex: none;
}

.metrics {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tags li {
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.6;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.card-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  text-decoration: none;
}

.card-links a:hover {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
}

.link-arrow {
  color: var(--color-accent);
}

/* A hackathon's "Watch demo" button, shrunk to the size of the links beside it. */
.card-links .button {
  gap: 0.3rem;
  padding: 0.1rem 0.5rem;
  font-size: 0.8rem;
  line-height: 1.4;
}

.card-links .button:hover {
  text-decoration: none;
}

.empty-note {
  font-style: italic;
}

/* ============================================================
   Hackathon gallery — "Photos & clips" button and pop-up
   ============================================================ */
/* Styled to match the GitHub link beside it. */
.gallery-button {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-text);
  font: inherit;
  cursor: pointer;
}

.gallery-button:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

.gallery-dialog {
  width: min(56rem, 100% - 2rem);
  max-height: calc(100% - 2rem);
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text-muted);
  box-shadow: 0 0 70px -20px var(--color-accent-glow);
  overscroll-behavior: contain;
}

.gallery-dialog[open] {
  animation: gallery-in 220ms ease-out;
}

/* ::backdrop can't read the colour variables in older browsers: this is --color-bg. */
.gallery-dialog::backdrop {
  background: rgba(11, 16, 36, 0.78);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.gallery-dialog[open]::backdrop {
  animation: gallery-fade 220ms ease-out;
}

@keyframes gallery-in {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.97);
  }
}

@keyframes gallery-fade {
  from {
    opacity: 0;
  }
}

.gallery-panel {
  display: grid;
  gap: 1.5rem;
  padding: 1.5rem;
}

.gallery-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.gallery-header .card-meta {
  margin-top: 0.35rem;
}

.gallery-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.gallery-close {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin: -0.4rem -0.4rem 0 0;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 150ms ease;
}

.gallery-close:hover {
  color: var(--color-accent);
}

.gallery-close svg {
  width: 1.3rem;
  height: 1.3rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 1rem;
}

.gallery-item {
  display: grid;
  align-content: start;
  gap: 0.5rem;
  margin: 0;
}

.gallery-item img,
.gallery-item video {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.gallery-item video {
  object-fit: contain; /* never crop a clip; letterbox it instead */
}

.gallery-item figcaption {
  font-size: 0.8rem;
  line-height: 1.5;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
}

.noscript {
  padding: 1rem var(--gutter);
  text-align: center;
}

/* ============================================================
   Desktop — two columns, sticky sidebar (1024px and wider)
   ============================================================ */
@media (min-width: 1024px) {
  :root {
    /* Top spacing shrinks on shorter screens so the left column always fits. */
    --desktop-top: clamp(2.5rem, 11vh, 6rem);
  }

  .layout {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 5rem;
    padding: 0 3rem;
  }

  /* The left column is pinned to the screen and never scrolls.
     Only the page (right column) scrolls. */
  .sidebar {
    position: sticky;
    top: 0;
    align-self: start;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    height: 100dvh;
    padding: var(--desktop-top) 0 clamp(2rem, 7vh, 4rem);
  }

  main {
    padding: var(--desktop-top) 0 4rem;
  }

  .section {
    padding-top: 0;
    margin-bottom: 7rem;
    scroll-margin-top: var(--desktop-top);
  }

  /* Titles are a normal heading on desktop; the sidebar nav shows position. */
  .section-title {
    position: static;
    margin: 0 0 1.75rem;
    padding: 0;
    background: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .section-nav {
    display: block;
    margin-top: clamp(1.5rem, 6vh, 3.5rem);
  }

  .section-nav a {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: clamp(0.35rem, 1.2vh, 0.55rem) 0;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-decoration: none;
    text-transform: uppercase;
  }

  .nav-line {
    display: block;
    width: 1.75rem;
    height: 1px;
    background: var(--color-text-faint);
    transition: width 200ms ease, background-color 200ms ease, box-shadow 200ms ease;
  }

  .nav-text {
    transition: color 200ms ease;
  }

  .section-nav a:hover .nav-line,
  .section-nav a:focus-visible .nav-line,
  .section-nav a.is-active .nav-line {
    width: 3.75rem;
    background: var(--color-accent);
    box-shadow: 0 0 8px var(--color-accent-glow);
  }

  .section-nav a:hover .nav-text,
  .section-nav a:focus-visible .nav-text,
  .section-nav a.is-active .nav-text {
    color: var(--color-text);
  }

  .sidebar-bottom {
    margin-top: 1.5rem;
  }
}

/* Short desktop windows (laptops with display scaling or browser zoom):
   tighten the left column's spacing so it still fits and stays pinned. */
@media (min-width: 1024px) and (max-height: 600px) {
  :root {
    --desktop-top: clamp(1.25rem, 8vh, 6rem);
  }

  .sidebar {
    padding-bottom: clamp(1rem, 5vh, 4rem);
  }

  .intro-name {
    font-size: clamp(2.25rem, 9vh, 3.5rem);
    line-height: 1.1;
  }

  .intro-headline {
    margin-top: 0.5rem;
    font-size: 1.05rem;
    line-height: 1.35;
  }

  .intro-tagline {
    margin-top: 0.6rem;
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .section-nav {
    margin-top: clamp(0.75rem, 4vh, 3.5rem);
  }

  .section-nav a {
    padding: 0.25rem 0;
  }

  .sidebar-bottom {
    margin-top: 0.75rem;
  }

  .button {
    padding: 0.5rem 1rem;
  }
}

/* Last resort for extremely short windows, where the left column cannot fit
   at all: let it scroll with the page so the CV button stays reachable. */
@media (min-width: 1024px) and (max-height: 360px) {
  .sidebar {
    position: static;
    height: auto;
  }
}

/* ============================================================
   Reduced motion — switch off all transitions
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}