/* ============================================================
   T. Handan Akyuz — Portfolio
   Pure HTML/CSS/JS
   ============================================================ */

/* ---------- Fonts (from Google Fonts) ---------- */
@import url("https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700&family=Gabarito:wght@500;600;700&display=swap");

/* ---------- Design Tokens ----------
   Channel triplets (R, G, B) so we can compose any alpha via rgba().
   The legacy `--color-*` names are kept so older rules keep working. */
:root,
:root[data-theme="dark"] {
  --font-sans: "Be Vietnam Pro", system-ui, sans-serif;
  --font-serif: "Gabarito", ui-serif, serif;

  /* Role channels (R,G,B only) */
  --bg-channels: 0, 0, 0;            /* page background */
  --surface-channels: 28, 35, 45;    /* cards / elevated */
  --fg-channels: 226, 232, 240;      /* primary text */
  --muted-channels: 148, 163, 184;   /* secondary text & borders */
  --primary-channels: 37, 99, 235;   /* accent (blue) */
  --shadow-channels: 0, 0, 0;        /* drop-shadow color */
  --polaroid-bg: #fff;
  --pattern-opacity: 0.05;

  /* Role solids */
  --bg: rgb(var(--bg-channels));
  --surface: rgb(var(--surface-channels));
  --fg: rgb(var(--fg-channels));
  --muted: rgb(var(--muted-channels));
  --primary: rgb(var(--primary-channels));

  /* Legacy aliases (older rules use these names) */
  --color-primary: var(--primary);
  --color-neutral: var(--muted);
  --color-white: var(--fg);
  --color-black: var(--bg);
  --color-card: var(--surface);
}

/* ---------- Light theme — soft sepia / parchment ---------- */
:root[data-theme="light"] {
  --bg-channels: 245, 239, 226;       /* warm cream parchment */
  --surface-channels: 235, 224, 203;  /* slightly deeper cream for cards */
  --fg-channels: 58, 46, 34;          /* dark sepia brown */
  --muted-channels: 125, 107, 83;     /* warm taupe */
  --primary-channels: 158, 86, 49;    /* clay / burnt sienna accent */
  --shadow-channels: 58, 46, 34;
  --polaroid-bg: #fdf8ec;
  --pattern-opacity: 0.08;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 300ms ease, color 300ms ease;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  padding: 0;
}

/* ---------- Layout ---------- */
main {
  max-width: 54rem; /* 768px = Tailwind max-w-3xl */
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  max-width: 64rem; /* max-w-5xl */
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg);
  padding: 1.5rem 1.25rem;
  animation: slide-in 600ms ease both;
  transition: background-color 300ms ease;
}

.header__controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ---------- Theme toggle button ---------- */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  border: 1px solid rgba(var(--muted-channels), 0.4);
  color: var(--muted);
  transition: color 200ms, border-color 200ms, transform 200ms;
}

.theme-toggle:hover {
  color: var(--fg);
  border-color: rgba(var(--muted-channels), 0.7);
  transform: rotate(15deg);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

/* Show sun icon in dark mode (clicking switches to light), moon in light mode */
.theme-toggle__sun { display: none; }
.theme-toggle__moon { display: block; }

:root[data-theme="dark"] .theme-toggle__sun { display: block; }
:root[data-theme="dark"] .theme-toggle__moon { display: none; }

@keyframes slide-in {
  10% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(0);
  }
}

.header__logo img {
  width: 45px;
  height: 45px;
  border-radius: 9999px;
  object-fit: cover;
}

.header__menu-button {
  color: var(--color-neutral);
  padding: 0 0.375rem;
  display: flex;
  align-items: center;
}

.header__menu-button svg {
  width: 24px;
  height: 24px;
}

.nav {
  position: absolute;
  top: 5rem;
  right: 1.25rem;
  display: none;
  background-color: var(--bg);
  border: 1px solid rgba(var(--muted-channels), 0.4);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  color: var(--muted);
}

.nav.is-open {
  display: block;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav__item {
  position: relative;
}

.nav__link {
  position: relative;
  display: block;
  padding: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  transition: all 500ms;
}

.nav__link::after {
  content: "•";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 0.5rem;
  width: 0.25rem;
  color: var(--color-primary);
  opacity: 0;
}

.nav__link:hover {
  color: var(--fg);
}

.nav__link.is-active {
  color: var(--fg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 6rem 0;
}

.hero__name {
  margin-bottom: 0.375rem;
  font-family: var(--font-serif);
  font-size: 3.75rem; /* text-7xl */
  font-weight: 700;
  letter-spacing: -2px;
  color: var(--color-white);
  line-height: 1;
}

.hero__title {
  margin-bottom: 2.25rem;
  font-family: var(--font-serif);
  font-size: 2.25rem; /* text-4xl */
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--color-primary);
}

.hero__summary {
  margin-bottom: 4rem;
  font-size: 1.125rem;
  line-height: 1.625rem;
  font-weight: 400;
  color: var(--color-neutral);
}

.button {
  display: inline-block;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 9999px;
  padding: 1.25rem 2rem;
  font-size: 1rem;
  line-height: 1.25rem;
  font-weight: 500;
  transition: filter 200ms;
}

.button:hover {
  filter: brightness(1.1);
}

/* ============================================================
   HOMEPAGE SECTIONS
   ============================================================ */
.section {
  padding: 6rem 0;
}

.section__heading {
  margin-bottom: 3.5rem;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--color-white);
  line-height: 1.1;
}

.section__subheading {
  margin: 3rem 0 1.75rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(var(--muted-channels), 0.2);
}

/* ============================================================
   PAGE SECTIONS
   ============================================================ */
.page-section {
  padding: 0;
}

.page-section__heading {
  margin-bottom: 1rem;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--color-white);
  line-height: 1.1;
}

.page-section__subheading {
  margin: 1.5rem 0 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(var(--muted-channels), 0.2);
}

/* ============================================================
   EXPERIENCE
   ============================================================ */
.experience {
  margin-bottom: 2.5rem;
}

.experience__company {
  margin-bottom: 0.375rem;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-white);
}

.experience__role {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-bottom: 1.25rem;
}

.experience__hours {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.95rem;
  color: rgba(var(--fg-channels), 0.55);
  letter-spacing: 0;
}

.experience__position {
  margin-bottom: 0.125rem;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--color-primary);
}

.experience__dates {
  padding-bottom: 0.125rem;
  font-size: 1rem;
  color: rgba(var(--fg-channels), 0.7);
}

.experience__list {
  list-style: none;
}

.experience__list-item {
  position: relative;
  margin-bottom: 0.75rem;
  padding-left: 2rem;
  font-size: 1.125rem;
  color: var(--color-neutral);
  line-height: 1.625rem;
}

.experience__list-item::before {
  content: url("assets/icons/check.svg");
  position: absolute;
  top: 0.25rem;
  left: 0;
}

/* ============================================================
   PROJECTS — flat grid of clickable cards
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: fit-content;
  gap: 1.5rem;
}

.project-card {
  display: flex;
  height: fit-content;
  flex-direction: column;
  border-radius: 1rem;
  border: 1px solid rgba(var(--muted-channels), 0.2);
  background-color: rgba(var(--surface-channels), 0.85);
  overflow: hidden;
  color: inherit;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.project-card:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--muted-channels), 0.5);
  box-shadow: 0 12px 30px -10px rgba(var(--shadow-channels), 0.4);
  text-decoration: none;
}

.project-card__media {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: 15%;
  position: relative;
  overflow: hidden;
}

.project-card__body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  flex: 1;
}

.project__tag {
  display: inline-block;
  margin-bottom: 0.25rem;
  padding: 0.25rem 0.625rem;
  border: 1px solid rgba(var(--muted-channels), 0.4);
  border-radius: 9999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-neutral);
  align-self: flex-start;
}

.project-card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.25;
}

.project-card__summary {
  font-size: 0.95rem;
  color: var(--color-neutral);
  line-height: 1.5rem;
  margin: 0;
}

.project-card__cta {
  margin-top: auto;
  padding-top: 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-white);
  transition: color 200ms;
}

.project-card__cta::after {
  display: inline-block;
  margin-left: 0.125rem;
  transition: transform 200ms;
}

.project-card:hover .project-card__cta {
  color: var(--color-primary);
}

/* Colored placeholder block fills the media area when no real screenshot exists */
.project__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -1px;
  color: rgba(var(--fg-channels), 0.9);
  text-align: center;
  padding: 1rem;
  background-image: linear-gradient(135deg, var(--ph-from, #2563eb) 0%, var(--ph-to, #1e40af) 100%);
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.25);
}

.project__placeholder--blue   { --ph-from: #3b82f6; --ph-to: #1d4ed8; }
.project__placeholder--teal   { --ph-from: #14b8a6; --ph-to: #0f766e; }
.project__placeholder--purple { --ph-from: #a855f7; --ph-to: #6b21a8; }
.project__placeholder--amber  { --ph-from: #f59e0b; --ph-to: #b45309; }
.project__placeholder--rose   { --ph-from: #f43f5e; --ph-to: #9f1239; }
.project__placeholder--green  { --ph-from: #22c55e; --ph-to: #15803d; }

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
}

.about__description {
  width: auto;
  font-size: 1.125rem;
  color: var(--color-neutral);
  line-height: 1.625rem;
  white-space: pre-line;
}

.about__photo-frame {
  height: 20rem;
  width: 16rem;
  flex-shrink: 0;
  transform: rotate(5deg);
  background-color: var(--polaroid-bg);
  padding: 1rem;
  box-shadow: 0 12px 30px -10px rgba(var(--shadow-channels), 0.3);
}

.about__photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  width: 100%;
  border-top: 1px solid rgba(var(--muted-channels), 0.2);
  padding: 1.25rem 1.25rem 2rem;
  text-align: center;
  color: var(--color-white);
}

.footer__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 1.25rem;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
}

.footer__link {
  display: inline-block;
  padding: 0.75rem 1rem;
  position: relative;
  transition: color 200ms;
}

.footer__link[target="_blank"]::after {
  content: url("assets/icons/external.svg");
  position: relative;
  bottom: -4px;
  margin-left: 4px;
}

.footer__link:hover {
  color: var(--color-primary);
}

.footer__credit {
  font-size: 0.875rem;
}

.footer__credit-by {
  color: var(--color-neutral);
}

/* ============================================================
   RESPONSIVE — sm (640px+)
   ============================================================ */
@media (min-width: 640px) {
  .header__menu-button {
    display: none;
  }

  .nav {
    position: static;
    display: block;
    background: transparent;
    border: 0;
    padding: 0;
  }

  .nav__list {
    flex-direction: row;
  }

  .hero__name {
    font-size: 4.5rem; /* text-8xl */
  }

  .hero__title {
    font-size: 2.5rem; /* text-5xl */
  }

  .projects-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
  }
}

/* ============================================================
   RESPONSIVE — md (768px+)
   ============================================================ */
@media (min-width: 768px) {
  .hero__name {
    margin-bottom: 0;
    font-size: 6rem; /* text-9xl */
  }

  .hero__title {
    font-size: 3rem; /* text-6xl */
  }

  .hero__summary {
    font-size: 1.25rem;
  }

  .section__heading {
    font-size: 2.5rem;
  }

  .about {
    flex-direction: row;
    gap: 2rem;
  }

  .about__text {
    padding-right: 1.25rem;
  }

  .about__photo-frame {
    transform: rotate(7deg);
  }

  .nav__link.is-active::after {
    opacity: 1;
  }
}

/* ============================================================
   SKILLS & TOOLS
   ============================================================ */
.skills {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.skills__group {
  border-top: 1px solid rgba(var(--muted-channels), 0.2);
  padding-top: 1.25rem;
}

.skills__heading {
  margin-bottom: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
}

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

.skills__list li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3125rem 0.75rem 0.3125rem 0.3125rem;
  border: 1px solid rgba(var(--muted-channels), 0.3);
  border-radius: 9999px;
  font-size: 0.9rem;
  color: var(--color-neutral);
  background-color: rgba(var(--surface-channels), 0.5);
}

/* Mini brand-logo badge (CSS-only — no external icon downloads) */
.skill-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0;
  color: #fff;
  flex-shrink: 0;
  line-height: 1;
}

/* Learning Management Systems */
.skill-logo--moodle     { background: #f98012; }
.skill-logo--d2l        { background: #00abe7; font-size: 0.6rem; }
.skill-logo--articulate { background: #e2511f; }

/* Authoring & Interactivity */
.skill-logo--h5p        { background: #1f8541; font-size: 0.6rem; }
.skill-logo--vyond      { background: #6a4fb6; }
.skill-logo--powtoon    { background: #f7931e; }

/* Media Production */
.skill-logo--photoshop  { background: #001e36; color: #31a8ff; border: 1px solid #31a8ff; }
.skill-logo--acrobat    { background: #b30b00; }
.skill-logo--canva      { background: #00c4cc; }
.skill-logo--descript   { background: #ff6f61; }
.skill-logo--wellsaid   { background: #1a5cf1; }
.skill-logo--clipchamp  { background: #6f2f8a; font-size: 0.6rem; }
.skill-logo--hitfilm    { background: #da0029; font-size: 0.6rem; }
.skill-logo--gimp       { background: #5c5543; }
.skill-logo--envato     { background: #82b541; }

/* Productivity & Web */
.skill-logo--ms365      { background: #d83b01; }
.skill-logo--google     { background: #4285f4; }
.skill-logo--html       { background: #e34f26; font-size: 0.55rem; padding: 0 2px; }

/* Maker & Fabrication */
.skill-logo--inkscape   { background: #000; border: 1px solid rgba(var(--muted-channels), 0.4); }
.skill-logo--lightburn  { background: #cc0000; }
.skill-logo--graphtec   { background: #d32f2f; font-size: 0.6rem; }
.skill-logo--tinkercad  { background: #1d7cc2; }
.skill-logo--bambulab   { background: #00ae42; }
.skill-logo--orca       { background: #ff6b00; }

@media (min-width: 640px) {
  .skills {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 2.5rem;
  }
}

/* ============================================================
   EDUCATION AND CERTIFICATIONS
   ============================================================ */
.education {
  margin-bottom: 2.5rem;
}

.education__school {
  margin-bottom: 0.375rem;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-white);
}

.education__degree {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-bottom: 1.25rem;
}

.education__major {
  margin-bottom: 0.125rem;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--color-primary);
}

.education__specialization {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.95rem;
  color: rgba(var(--fg-channels), 0.55);
  letter-spacing: 0;
}

.education__dates {
  padding-bottom: 0.125rem;
  font-size: 1rem;
  color: rgba(var(--fg-channels), 0.7);
}

.education__list {
  list-style: none;
}

.education__list-item {
  position: relative;
  margin-bottom: 0.75rem;
  padding-left: 2rem;
  font-size: 1.125rem;
  color: var(--color-neutral);
  line-height: 1.625rem;
}

.education__list-item::before {
  content: url("assets/icons/check.svg");
  position: absolute;
  top: 0.25rem;
  left: 0;
}

.certs__subheading {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
}

.certifications {
  list-style: disc inside;
  padding-left: 0.5rem;
  color: var(--color-neutral);
}

.certifications__list {
  list-style: none;
}

.certifications__list-item {
  position: relative;
  margin-bottom: 0.75rem;
  padding-left: 2rem;
  font-size: 1.125rem;
  color: var(--color-neutral);
  line-height: 1.625rem;
}

.certifications__list-item::before {
  content: url("assets/icons/check.svg");
  position: absolute;
  top: 0.25rem;
  left: 0;
}

/* ============================================================
   ABOUT (multi-paragraph)
   ============================================================ */
.about__text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.about__description + .about__description {
  margin-top: 0;
}

/* ============================================================
   PROJECT DETAIL PAGE
   ============================================================ */
main > .project-page {
  padding: 2rem 0 4rem;
}

.project-page__tag {
  display: inline-block;
  margin-bottom: 1.25rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--color-primary);
  border-radius: 9999px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-primary);
}

.project-page__title {
  margin-bottom: 1rem;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.1;
  color: var(--color-white);
}

.project-page__lede {
  margin-bottom: 2.5rem;
  font-size: 1.125rem;
  line-height: 1.625rem;
  color: var(--color-neutral);
}

.project-page__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 3rem;
  padding: 1.5rem;
  border: 1px solid rgba(var(--muted-channels), 0.2);
  border-radius: 1rem;
  background-color: rgba(var(--surface-channels), 0.4);
}

.project-page__meta-item dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-neutral);
  margin-bottom: 0.25rem;
}

.project-page__meta-item dd {
  margin: 0;
  font-size: 1rem;
  color: var(--color-white);
}

@media (min-width: 640px) {
  .project-page__meta {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .project-page__title {
    font-size: 3rem;
  }
}

.project-page__block {
  margin-bottom: 2.5rem;
}

.project-page__block-heading {
  margin-bottom: 1rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
}

.project-page__body p {
  margin-bottom: 1rem;
  font-size: 1.0625rem;
  line-height: 1.625rem;
  color: var(--color-neutral);
}

.project-page__list {
  list-style: none;
}

.project-page__list li {
  position: relative;
  margin-bottom: 0.75rem;
  padding-left: 2rem;
  font-size: 1.0625rem;
  color: var(--color-neutral);
  line-height: 1.625rem;
}

.project-page__list li::before {
  content: url("assets/icons/check.svg");
  position: absolute;
  top: 0.25rem;
  left: 0;
}

.project-page__pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-page__pill-list li {
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(var(--muted-channels), 0.3);
  border-radius: 9999px;
  font-size: 0.9rem;
  color: var(--color-neutral);
  background-color: rgba(var(--surface-channels), 0.5);
}

.project-page__note {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--primary);
  background-color: rgba(var(--primary-channels), 0.08);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.95rem;
  color: rgba(var(--fg-channels), 0.85);
  line-height: 1.5rem;
}

.project-page__iframe-wrapper {
  position: center;
  margin-bottom: 2.5rem;
}

/* ============================================================
   "BACK TO ..." TEXT LINK 
   ============================================================ */

main > .back-link {
  padding: 2rem 0 4rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
  color: var(--color-neutral);
  transition: color 200ms;
}

.back-link:hover {
  color: var(--color-white);
}

.back-link::before {
  content: "←";
  display: inline-block;
  transition: transform 200ms;
}

.back-link:hover::before {
  transform: translateX(-3px);
}

/* ============================================================
   Responsive 16:9 video embed wrapper
   ============================================================ */

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: rgba(var(--surface-channels), 0.6);
  border: 1px solid rgba(var(--muted-channels), 0.2);
  border-radius: 0.75rem;
  overflow: hidden;
  margin-bottom: 1rem;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-embed--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: var(--color-neutral);
  font-family: var(--font-sans);
}

.video-caption {
  font-size: 0.875rem;
  color: rgba(var(--fg-channels), 0.55);
  font-style: italic;
  margin-bottom: 1.5rem;
}

/* ============================================================
   Stl Viewer Javascript Plugin
   ============================================================ */

.stl-cont {
  overflow: auto;
  position: static;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  margin-bottom: 1rem;
}