/* CSS Variables */
:root {
  --font-family: "Apple Myungjo", serif;
  --font-size: 20px;
  --margin: 20px;
  --gutter: 20px;
  --color-text: #000000;
  --color-bg: #ffffff;
  --transition-speed: 180ms;

  /* Index page */
  --index-row-height: 180px;
  --index-gap: var(--gutter);
  --index-placeholder-color: #e0e0e0;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

/* Typography */
body {
  font-family: var(--font-family);
  font-size: var(--font-size);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

p {
  margin: 0;
}

/* -------------------------------------------------Layout------------------------------------------------- */
.portfolio {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  grid-template-rows: repeat(7, 1fr);
  gap: var(--gutter);
  padding: var(--margin);
  height: 100svh;
  min-height: 100svh;
}

/* -------------------------------------------------Header------------------------------------------------- */
.portfolio__header {
  grid-column: 1 / -1;
  grid-row: 1 / 2;
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: var(--gutter);
  align-items: start;
}

/*  -------------------------------------------------Name------------------------------------------------- */
.portfolio__name {
  grid-column: 1 / 3;
}

.portfolio__name:hover {
  font-style: italic;
}

/*  -------------------------------------------------Roles------------------------------------------------- */
.portfolio__roles {
  grid-column: 5 / 10;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.portfolio__role {
  font-size: var(--font-size);
}

/*  -------------------------------------------------Navigation------------------------------------------------- */
.portfolio__nav {
  grid-column: 12 / 13;
  text-align: left;
}

.portfolio__nav-link {
  font-size: var(--font-size);
  transition: font-style var(--transition-speed) ease;
}

.portfolio__nav-link:hover {
  font-style: italic;
}

/* -------------------------------------------------Projects Section------------------------------------------------- */
.portfolio__projects {
  grid-column: 1 / -1;
  grid-row: 2 / 7;
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: var(--gutter);
  align-items: center;
  position: relative;
  overflow: visible;
}

.projects-container {
  grid-column: 1 / -1;
  display: contents;
}

.projects-media {
  grid-column: 4 / 11;
  width: 100%;
  height: 60svh;
  object-fit: contain;
  visibility: hidden;
}

.projects-info {
  grid-column: 1 / 4;
  font-size: var(--font-size);
  text-align: left;
  visibility: hidden;
}

.projects-year {
  grid-column: 12 / 13;
  font-size: var(--font-size);
  text-align: left;
  visibility: hidden;
}

.portfolio__projects:hover .projects-info,
.portfolio__projects:hover .projects-media,
.portfolio__projects:hover .projects-year {
  visibility: visible;
}

/* -------------------------------------------------Projects Pointers (Hover Navigation)------------------------------------------------- */
.projects-pointers {
  position: absolute;
  inset: 0;
  display: grid;
  gap: 0;
  pointer-events: auto;
  z-index: 20;
}

.project-pointer {
  height: 100%;
  width: 100%;
  cursor: pointer;
  background-color: transparent;
  border: none;
  padding: 0;
  transition: background-color var(--transition-speed) ease;
  position: relative;
  opacity: 0;
}

.project-pointer:hover {
  background-color: rgba(0, 0, 0, 0.03);
  opacity: 1;
}

.project-pointer.active {
  opacity: 0;
}

.project-pointer--has-media {
  display: flex;
  flex-direction: column;
}

.media-sub-pointer {
  flex: 1;
  width: 100%;
  cursor: pointer;
}

/* -------------------------------------------------Bio------------------------------------------------- */
.portfolio__bio {
  grid-column: 5 / 10;
  grid-row: 2 / 7;
  align-self: center;
  text-align: center;
  display: none;
  z-index: 30;
  pointer-events: none;
}

/* -------------------------------------------------Footer------------------------------------------------- */
.portfolio__footer {
  grid-column: 1 / -1;
  grid-row: 7 / -1;
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  column-gap: var(--gutter);
  align-content: end;
}

.portfolio__letter-archive {
  grid-column: 12 / 13;
  grid-row: 1;
  text-align: left;
  visibility: hidden;
}

.portfolio__contact {
  display: contents;
}

.portfolio__contact-item {
  grid-column: 1 / 3;
  font-size: var(--font-size);
  margin-bottom: 5px;
}

.portfolio__contact-item:last-child {
  margin-bottom: 0;
}

/* -------------------------------------------------Index Page------------------------------------------------- */

/* Active nav link — italic when on the index page */
.portfolio__nav-link--active {
  font-style: italic;
}

/* Override main portfolio constraints for the index page */
.portfolio--index {
  height: 100svh;
  grid-template-rows: auto 1fr auto;
}

.portfolio--index .portfolio__header {
  grid-row: 1;
}

.portfolio--index .portfolio__footer {
  grid-row: 3;
}

/* Index content section */
.portfolio__index {
  grid-column: 1 / -1;
  grid-row: 2;
  display: flex;
  align-items: center;
}

/* Grid wrapper — flex column so each row is an independent div */
.index-grid {
  display: flex;
  flex-direction: column;
  gap: var(--index-gap);
}

/* Each row: fixed height, cells flex to their content's aspect ratio */
.index-row {
  display: flex;
  gap: var(--index-gap);
  height: var(--index-row-height);
}

/* Individual cell — equal fixed width, image fills the cell */
.index-cell {
  flex: 1 1 0;
  min-width: 0;
  overflow: hidden;
  background-color: transparent;
  cursor: pointer;
  position: relative;
}

.index-cell img,
.index-cell video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.index-cell--empty {
  cursor: default;
}

.index-grid--hovered .index-cell img,
.index-grid--hovered .index-cell video {
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

.index-grid--hovered .index-cell--active img,
.index-grid--hovered .index-cell--active video {
  opacity: 1;
}

/* -------------------------------------------------Project Page------------------------------------------------- */
.portfolio--project {
  height: 100svh;
}

.portfolio--project .portfolio__header,
.portfolio--project .portfolio__footer {
  position: relative;
  z-index: 2;
  background-color: transparent;
}

.portfolio--project .portfolio__letter-archive {
  display: none;
}

.portfolio__project {
  grid-column: 1 / -1;
  grid-row: 2 / 7;
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: var(--gutter);
  min-height: 0;
}

.project-info__name {
  grid-column: 1 / 4;
  grid-row: 2 / 3;
  align-self: start;
  position: relative;
  z-index: 2;
}

.project-info__year {
  grid-column: 5 / 6;
  grid-row: 2 / 3;
  position: relative;
  z-index: 2;
}

.project-info__description {
  grid-column: 1 / 7;
  grid-row: 3 / 4;
  align-self: start;
  position: relative;
  z-index: 2;
}

.project-media {
  position: fixed;
  top: var(--margin);
  bottom: var(--margin);
  --_row: calc((100svh - 2 * var(--margin) - 6 * var(--gutter)) / 7);
  padding-top: calc(var(--_row) + var(--gutter));
  --_col: calc((100vw - 2 * var(--margin) - 12 * var(--gutter)) / 13);
  left: calc(var(--margin) + 7 * (var(--_col) + var(--gutter)));
  width: calc(5 * var(--_col) + 4 * var(--gutter));
  z-index: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
  scrollbar-width: none;
}

.project-media::-webkit-scrollbar {
  display: none;
}

.project-media__item {
  width: 100%;
  height: auto;
  display: block;
  flex-shrink: 0;
}

/* -------------------------------------------------Responsive Design------------------------------------------------- */
@media (max-width: 768px) {

  /* --- Base: flex column, full viewport --- */
  .portfolio {
    display: flex;
    flex-direction: column;
    height: 100svh;
    min-height: 100svh;
    gap: var(--gutter);
    grid-template-columns: none;
    grid-template-rows: none;
  }

  /* --- Header: name left, nav right --- */
  .portfolio__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-shrink: 0;
    grid-column: unset;
    grid-template-columns: none;
    gap: 0;
    margin-bottom: 0;
  }

  .portfolio__name { grid-column: unset; }

  .portfolio__roles { display: none; }

  .portfolio__nav {
    grid-column: unset;
    text-align: right;
  }

  /* --- Projects: fill remaining space, always show content --- */
  .portfolio__projects {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    grid-column: unset;
    grid-row: unset;
    grid-template-columns: none;
    align-items: unset;
  }

  /* Override display:contents so we can use grid inside */
  .projects-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr;
    gap: var(--gutter);
    width: 100%;
    height: 100%;
  }

  .projects-info {
    grid-column: 1;
    grid-row: 1;
    visibility: visible;
    text-align: left;
    font-size: var(--font-size);
  }

  .projects-year {
    grid-column: 2;
    grid-row: 1;
    visibility: visible;
    text-align: right;
    font-size: var(--font-size);
  }

  .projects-media {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    height: 100%;
    object-fit: contain;
    visibility: visible;
  }

  /* Always visible on mobile (override hover-only rule) */
  .portfolio__projects .projects-info,
  .portfolio__projects .projects-media,
  .portfolio__projects .projects-year {
    visibility: visible;
  }

  /* Hide desktop pointer overlay */
  .projects-pointers { display: none; }

  /* Hide bio (shown on name hover on desktop) */
  .portfolio__bio { display: none; }

  /* --- Footer --- */
  .portfolio__footer {
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    grid-column: unset;
    grid-row: unset;
    grid-template-columns: none;
    column-gap: 0;
  }

  .portfolio__letter-archive { display: none; }

  .portfolio__contact {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .portfolio__contact-item {
    grid-column: unset;
    margin-bottom: 0;
  }

  /* --- Works / Index page --- */
  .portfolio--index {
    height: auto;
    min-height: 100svh;
    overflow-y: auto;
  }

  .portfolio--index .portfolio__index {
    align-items: flex-start;
    overflow-y: auto;
    padding: var(--gutter) 0;
  }

  .index-grid { width: 100%; }

  .index-row {
    flex-wrap: wrap;
    height: auto;
  }

  .index-cell {
    flex: 0 0 calc(33.333% - var(--index-gap) * 2 / 3);
    height: 110px;
  }

  .index-cell--empty { display: none; }

  /* --- Project page --- */
  .portfolio--project {
    height: auto;
    min-height: 100svh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
  }

  .portfolio--project .portfolio__header,
  .portfolio--project .portfolio__footer {
    flex-shrink: 0;
  }

  .portfolio__project {
    flex: 1;
    grid-column: unset;
    grid-row: unset;
    display: flex;
    flex-direction: column;
    gap: var(--gutter);
    grid-template-columns: none;
    grid-template-rows: none;
    min-height: 0;
  }

  .project-info__name,
  .project-info__year,
  .project-info__description {
    grid-column: unset;
    grid-row: unset;
    position: static;
  }

  .project-media {
    position: relative;
    top: auto;
    bottom: auto;
    left: auto;
    width: 100%;
    padding-top: 0;
    overflow-y: visible;
    height: auto;
  }
}