/* ----------------------------------------------------
   Global reset & variables
---------------------------------------------------- */
/* latin-ext */
@font-face {
  font-family: "Poppins";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/poppins/poppins_400.woff2") format("woff2");
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: "Poppins", system-ui, -apple-system, sans-serif;
  font-weight: 400; 
  background: #000;
  color: #111;
}

/* Base design reference: 1920x1080
   - 40px   ≈ 3.7vh
   - 104px  ≈ 9.6vh
*/

:root {
  /* main knobs */
  --corner-size: calc(100vh * 104 / 1080);   /* ≈ 9.6vh */
  --corner-margin: calc(100vh * 40 / 1080);  /* ≈ 3.7vh */
  --nav-thickness: calc(100vh * 104 / 1080); /* same as corner, for alignment */
  --arrow-size: calc(100vh * 40 / 1080);     /* ≈ 3.7vh */
  --arrow-bg-size: 0.25em;

  /* card sizing */
  --card-radius: calc(100vh * 24 / 1080);    /* ≈ 2.2vh */
  --card-pad-v: calc(100vh * 40 / 1080);     /* ≈ 3.7vh */
  --card-pad-h: calc(100vh * 48 / 1080);     /* ≈ 4.4vh */

  /* card shadow (soft approximation of 24px 60px) */
  --card-shadow-y: calc(100vh * 24 / 1080);
  --card-shadow-blur: calc(100vh * 60 / 1080);

  /* card in navigation arrows rectangle */
  --safe-inset: calc(var(--corner-margin) + var(--corner-size));
}

/* ----------------------------------------------------
   Viewport & background
---------------------------------------------------- */

.viewport {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.viewport__background {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image 0.4s ease-out;
  z-index: 0;
}

/* ----------------------------------------------------
   Corners (base icons) & labels
---------------------------------------------------- */

/* ---------- Corners: pill background + icon + extra content ---------- */

.corner {
  position: absolute;
  height: var(--corner-size);
  padding: 0;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  cursor: pointer;
  z-index: 200;
}

/* ---------- Corner inner container ---------- */

.corner-inner {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: var(--corner-size);
  z-index: 210;
}

/* positions */

.corner--tl {
  top: var(--corner-margin);
  left: var(--corner-margin);
}

.corner--tr {
  top: var(--corner-margin);
  right: var(--corner-margin);
}

.corner--bl {
  bottom: var(--corner-margin);
  left: var(--corner-margin);
  cursor: default;
}

.corner--br {
  bottom: var(--corner-margin);
  right: var(--corner-margin);
}

/* If corners are buttons on mobile, remove iOS default blue text / styling */
button.corner {
  -webkit-appearance: none;
  appearance: none;
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: inherit;
}

/* ---------- White square background ---------- */

.corner-bg {
  position: absolute;
  width: calc(var(--corner-size) + 8px);
  height: calc(var(--corner-size) + 8px);
  background: rgba(255, 255, 255, 0.95);
  top: -4px;   /* 4px bigger: -2 top, -2 left */
  left: -4px;
  opacity: 0;                 /* hidden by default */
  pointer-events: none;       /* background never blocks interaction */
  transform: scale(0.92);
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
  z-index: 190;
}

/* BL + BR: background covers icon + label / socials (roll-out) */

.corner--bl .corner-bg,
.corner--br .corner-bg {
  top: -4px;
  bottom: -4px;
  left: -4px;
  right: -4px;
  width: auto;
  height: auto;
  transform: none; /* no extra scale on these */
}

/* icon inside pill */

.corner__icon {
  width: var(--corner-size);
  height: var(--corner-size);
  flex: 0 0 auto;
  z-index: 210;
}

/* ---------- Project label roll-out (BL) ---------- */

.corner-label {
  white-space: nowrap;
  overflow: hidden;
  max-width: 0;
  opacity: 0;
  transform: translateX(0);
  font-size: clamp(1.2rem, 2.4vh, 2.0rem);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition:
    max-width 0.2s ease-out,
    opacity 0.15s ease-out,
    transform 0.15s ease-out;
  z-index: 210;
}

/* ---------- Bottom-right corner (socials) ---------- */

.corner-bg--br {
  flex-direction: row-reverse; /* icon on the right, socials on the left */
}

/* stacked base / social icons */

.corner-main {
  position: relative;
  width: var(--corner-size);
  height: var(--corner-size);
  flex: 0 0 auto;
}

.corner-main .corner__icon {
  position: absolute;
  inset: 0;
}

.icon-base {
  opacity: 1;
  transition: opacity 0.15s ease-out;
  z-index: 210;
}

.icon-social {
  opacity: 0;
  transition: opacity 0.15s ease-out;
  z-index: 210;
}

.corner--br .corner-inner {
  flex-direction: row-reverse;
  gap: calc(var(--corner-size) * 0.1);
}

.corner--bl .corner-inner {
  align-items: flex-end;
}

.corner--br .social-list a {
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
}

.corner--br.is-open .social-list a {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (hover: hover) and (pointer: fine) {
  .corner--br:hover .social-list a {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

/* social list sits inside the same pill, to the left of the icon */

.social-list {
  display: inline-flex;
  align-items: center;
  overflow: hidden;
  max-width: 0;
  opacity: 0;
  transition:
    max-width 0.25s ease-out,
    opacity 0.15s ease-out,
    transform 0.15s ease-out;
  z-index: 210;
}

/* same size as corner icons */

.social-list a img {
  width: var(--corner-size);
  height: var(--corner-size);
  display: block;
  opacity: 0.8;
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
}

/* small spacing between social icons */

.social-list a + a {
  margin-left: calc(var(--corner-size) * 0.1);
}

/* ------------------------------
   TAP (mobile) state = .is-open
------------------------------ */

.corner--bl.is-open .corner-label--project {
  max-width: 40vh;
  opacity: 1;
  margin-left: 0.1rem;
  transform: translateX(0.2rem);
}

.corner--br.is-open .icon-base { opacity: 0; }
.corner--br.is-open .icon-social { opacity: 1; }

.corner.is-open .corner-bg {
  opacity: 1;
  transform: scale(1);
}

.corner--br.is-open .social-list {
  max-width: 999px;
  opacity: 1;
}

/* ------------------------------
   HOVER (desktop only)
------------------------------ */
@media (hover: hover) and (pointer: fine) {

  .corner--bl:hover .corner-label--project {
    max-width: 40vh;
    opacity: 1;
    margin-left: 0.1rem;
    transform: translateX(0.2rem);
  }

  .corner--br:hover .icon-base { opacity: 0; }
  .corner--br:hover .icon-social { opacity: 1; }

  .corner:hover .corner-bg {
    opacity: 1;
    transform: scale(1);
  }

  .corner--br:hover .social-list {
    max-width: 999px;
    opacity: 1;
  }

  .social-list a:hover img {
    opacity: 1;
    transform: scale(0.98);
  }
}


/* ----------------------------------------------------
   Navigation edge zones (centered between corners)
---------------------------------------------------- */

/* transparent middle strips between corner icons */

.nav {
  position: absolute;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

/* LEFT / RIGHT:
   inset horizontally by corner margin
   vertical space between top & bottom corners
*/

.nav--left,
.nav--right {
  top: calc(var(--corner-margin) + var(--corner-size));
  bottom: calc(var(--corner-margin) + var(--corner-size));
  width: var(--nav-thickness);
}

.nav--left {
  left: var(--corner-margin);
}

.nav--right {
  right: var(--corner-margin);
}

/* TOP / BOTTOM:
   inset vertically by corner margin
   horizontal space between left & right corners
*/

.nav--top,
.nav--bottom {
  left: calc(var(--corner-margin) + var(--corner-size));
  right: calc(var(--corner-margin) + var(--corner-size));
  height: var(--nav-thickness);
}

.nav--top {
  top: var(--corner-margin);
}

.nav--bottom {
  bottom: var(--corner-margin);
}

/* Arrow icon – one SVG rotated (base arrow.svg points LEFT) */

.nav img {
  width: var(--arrow-size);
  height: var(--arrow-size);
  opacity: 0.55;
  transition: opacity 0.15s ease-out,
    transform 0.15s ease-out,
    box-shadow 0.15s ease-out,
    background-color 0.15s ease-out;
}

/* Active for mobile */
@media (hover: none) and (pointer: coarse) {
  .nav:active img {
    /* white press background */
    background-color: #fff;
    box-shadow: 0 0 0 var(--arrow-bg-size) #fff;
  }
}

/* rotations */

.nav--left img {
  transform: rotate(0deg);
}

.nav--right img {
  transform: rotate(180deg);
}

.nav--top img {
  transform: rotate(90deg);
}

.nav--bottom img {
  transform: rotate(-90deg);
}

/* keep rotation + add scale on hover (DESKTOP ONLY) */
@media (hover: hover) and (pointer: fine) {

  .nav--left:hover img {
    opacity: 0.95;
    transform: rotate(0deg) scale(1.05);
    background-color: #fff;
    box-shadow: 0 0 0 var(--arrow-bg-size) #fff;
  }

  .nav--right:hover img {
    opacity: 0.95;
    transform: rotate(180deg) scale(1.05);
    background-color: #fff;
    box-shadow: 0 0 0 var(--arrow-bg-size) #fff;
  }

  .nav--top:hover img {
    opacity: 0.95;
    transform: rotate(90deg) scale(1.05);
    background-color: #fff;
    box-shadow: 0 0 0 var(--arrow-bg-size) #fff;
  }

  .nav--bottom:hover img {
    opacity: 0.95;
    transform: rotate(-90deg) scale(1.05);
    background-color: #fff;
    box-shadow: 0 0 0 var(--arrow-bg-size) #fff;
  }
}

/* ----------------------------------------------------
   Central card (popup)
---------------------------------------------------- */

.card {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #ffffff;
  /*border-radius: var(--card-radius);*/
  box-shadow: 0 var(--card-shadow-y) var(--card-shadow-blur)
    rgba(0, 0, 0, 0.4);
  padding: var(--card-pad-v) var(--card-pad-h);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.25s ease-out,
    transform 0.25s ease-out;
  z-index: 100;
  /* keep your current positioning (approx center) */
  max-width: min(90ch, calc(100vw - (2 * var(--safe-inset))));
  max-height: calc(100vh - (2 * var(--safe-inset)));
  overflow: auto; /* important on small screens */
  /* animation offset (only this changes) */
  --card-shift-y: 1vh;

  transform: translate(-50%, -50%) translateY(var(--card-shift-y));
}

.card--visible {
  opacity: 1;
  z-index: 1000;
  pointer-events: auto;
  --card-shift-y: 0vh;
}

.card-overlay {
  position: absolute;
  inset: 0;
  z-index: 900;              /* below .card (1000) but above background */
  opacity: 0;
  pointer-events: none;
}

.card-overlay--visible {
  pointer-events: auto;
}

.card__close {
  position: absolute;
  top: calc(var(--card-pad-v) * 0.45);
  right: calc(var(--card-pad-h) * 0.45);
  border: none;
  background: transparent;
  font-size: clamp(1.4rem, 2vh, 1.8rem);
  line-height: 1;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
}

.card__close:hover {
  opacity: 1;
  transform: scale(1.05);
}

.card__content {
  display: flex;
  flex-direction: column;
  align-items: center;      /* horizontal centering */
  justify-content: center;  /* vertical centering */
  text-align: center;
  height: 100%;
}

.card__content h1 {
  font-size: clamp(1.6rem, 3vh, 2.2rem);
  margin: 0 0 0.6rem;
  letter-spacing: 0.08em;
}

.card__content h2 {
  font-size: clamp(1.1rem, 2.1vh, 1.4rem);
  margin: 0 0 1.3rem;
  color: #555;
}

.card__content p {
  max-width: 60ch;
  margin: 0 0 1rem;
  line-height: 1.6;
  font-size: clamp(0.9rem, 1.7vh, 1rem);
}

/* Links inside card texts */

.card__content a {
  color: #0055ff;
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 85, 255, 0.3);
}

.card__content a:hover {
  border-bottom-color: rgba(0, 85, 255, 0.7);
}

/* Hide empty paragraphs via [hidden] attribute */

.card__content p[hidden] {
  display: none;
}

/* Full-page white background for D slide */
.project-page {
  position: absolute;
  inset: 0;
  background: #ffffff;
  z-index: 3; /* below nav & corners */
  display: none;
}

/* visible only on D */
.project-page--visible {
  display: block;
}

/* inline card version */
.card--inline {
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: transparent;
  opacity: 1;
  pointer-events: auto;
  z-index: 3;
  /* keep your current positioning (approx center) */
  max-width: min(90ch, calc(100vw - (2 * var(--safe-inset))));
  max-height: calc(100vh - (2 * var(--safe-inset)));
  overflow: auto; /* important on small screens */
}

/* spacing similar to popup card */
.card--inline .card__content {
  padding: clamp(3rem, 8vh, 6rem) 2rem;
}

.corner-inner { position: relative; }
.corner-bg { z-index: 1; }
.corner-main, .social-list, .corner__icon { position: relative; z-index: 2; }

/* Desktop: do NOT constrain wrapper width */
.corner--br .social-wrap {
  width: auto;
  display: contents;
}

.corner--br .social-bg {
  display: none;
}

/* ----------------------------------------------------
   Preloader (full white screen + centered pulsing icon)
---------------------------------------------------- */

.preloader {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 9999; /* above everything */
  display: grid;
  place-items: center;
  opacity: 1;
  transition: opacity 0.35s ease-out, visibility 0.35s ease-out;
}

.preloader__icon {
  width: clamp(56px, 10vh, 110px);
  height: auto;
  animation: preloaderPulse 1.1s ease-in-out infinite;
  transform-origin: center;
}

/* fade out state */
.preloader--hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

@keyframes preloaderPulse {
  0%   { transform: scale(0.92); opacity: 0.55; }
  50%  { transform: scale(1.00); opacity: 1; }
  100% { transform: scale(0.92); opacity: 0.55; }
}

/* ----------------------------------------------------
   Responsiveness tweaks (optional, extra control)
---------------------------------------------------- */

@media (max-aspect-ratio: 4/3) {
  /* on taller screens, slightly reduce sizes */
  :root {
    --corner-size: calc(100vh * 90 / 1080);
    --corner-margin: calc(100vh * 32 / 1080);
    --nav-thickness: calc(100vh * 90 / 1080);
    --arrow-size: calc(100vh * 32 / 1080);
  }
}

@media (max-width: 768px) {
  .card {
    top: calc(env(safe-area-inset-top, 16px) + 22vh);
    left: auto;
    right: auto;
    bottom: auto;
    transform: none;

    position: fixed;

    width: auto;
    max-width: none;
    max-height: 60vh;

    overflow-y: auto;
  }

  .corner--br {
    position: absolute; /* keep as positioning context */
  }

  .corner--br .social-wrap {
    display: block;
    position: absolute;
    right: 0;
    bottom: calc(var(--corner-size) + 0.4rem);
    width: var(--corner-size); /* keep your good width */
    z-index: 220;
  }

  /* white background that hugs the social-list area */
  .corner--br .social-bg {
    display: block; /* re-enable on mobile */
    position: absolute;
    top: -4px;
    bottom: -4px;
    right: -4px;
    width: calc(var(--corner-size) + 8px);
    background: rgba(255, 255, 255, 0.95);
    opacity: 0;
    transition: opacity 0.15s ease-out;
    z-index: 0;
    pointer-events: none;
  }

  /* vertical rollout list */
  .corner--br .social-list {
    display: flex;
    flex-direction: column;   /* <- this is what keeps it vertical */
    align-items: flex-end;    /* <- keeps it aligned to BR icon */
    position: relative;
    z-index: 1;
    max-width: none;
    width: auto;
  }

  /* spacing between vertical icons */
  .corner--br .social-list a + a {
    margin-left: 0;
    margin-top: calc(var(--corner-size) * 0.08);
  }
}

/* Touch devices: don't use :hover (it can stick). Use .is-open instead. */
@media (hover: none) and (pointer: coarse) {

  /* neutralize hover-driven BR visuals on touch */
  .corner:hover .corner-bg { opacity: 0; }
  .corner--br:hover .social-bg { opacity: 0; }

  /* open state (tap toggles .is-open on .corner--br) */
  .corner--br.is-open .corner-bg { opacity: 1; }
  .corner--br.is-open .social-bg { opacity: 1; }

  /* make sure list shows/hides from the class, not hover */
  .corner--br .social-list { opacity: 0; max-height: 0; overflow: hidden; }
  .corner--br.is-open .social-list { opacity: 1; max-height: calc(var(--corner-size) * 10); }

  /* icon swap also from class */
  .corner--br.is-open .icon-base { opacity: 0; }
  .corner--br.is-open .icon-social { opacity: 1; }

  .corner--br .social-list { max-width: none; } 
  /* BL: use .is-open instead of sticky :hover */
  .corner--bl.is-open .corner-bg {
    opacity: 1;
  }

  .corner--bl.is-open .corner-label {
    max-width: 40vh;
    opacity: 1;
    margin-left: 0.1rem;
    transform: translateX(0.2rem);
  }

    .corner--br .social-list {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    pointer-events: none;
  }

  .corner--br.is-open .social-list {
    opacity: 1;
    max-height: 300px; /* or whatever fits */
    pointer-events: auto;
  }
}