/* =========================
   Fonts
========================= */
@import url("https://fonts.googleapis.com/css2?family=Special+Elite&display=swap");

@font-face {
  font-family: "2Dumb";
  src: url(../fonts/2Dumb.ttf) format("truetype");
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: "SabonLTPaneuropean";
  src: url(../fonts/SabonLTPaneuropean.ttf) format("truetype");
  font-weight: 400;
  font-style: normal;
}

/* =========================
   Design tokens
========================= */
:root {
  /* Fonts */
  --font-card: "2Dumb";
  --font-special: "Special Elite", cursive;
  --font-base: "SabonLTPaneuropean", serif;

  /* Colors */
  --c-bg: #070707;
  --c-fg: #fff;
  --c-muted: rgba(255, 255, 255, 0.72);

  --c-card-front-bg: #fff;
  --c-card-front-fg: #000;

  --c-card-back-bg: #1c1c1c;
  --c-card-back-fg: #fff;

  --c-border-soft: rgba(255, 255, 255, 0.1);
  --c-border-card: rgba(0, 0, 0, 0.15);

  --c-link: #fff;
  --c-link-hover-bg: #fff;
  --c-link-hover-fg: #1c1c1c;

  /* Playing-card suit / corner */
  --suit-color: #000;

  /* Layout sizing */
  --stage-max: 1200px;
  --content-max: 1100px;

  /* Intro animation */
  --p: 0; /* 0..1 scroll progress */
  --intro-height: 180vh;
  --intro-pad: 22px;

  /* Spacing */
  --gutter: 48px;
  --side-offset: 10px;
  --pair-gap: 120px;

  /* Logo sizing */
  --logo-w: min(700px, 70vw);
  --logo-scale-min: 0.65; /* end scale */
  --logo-opacity-drop: 0.1;

  /* Card sizing */
  --card-w: 130px;
  --card-h: 200px;
  --card-w-mobile: 150px;
  --card-h-mobile: 220px;

  /* Radii */
  --r-card: 18px;
  --r-link: 5px;
  --r-about: 16px;
  --r-photo: 50%;

  /* Typography */
  --fs-section-title: 20px;
  --fs-corner: 22px;
  --fs-card-title: 17px;
  --fs-link: 14px;

  --lh-card-title: 1.25;
  --lh-body: 1.55;

  /* Shadows */
  --shadow-soft: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-focus: 0 0 0 2px rgba(255, 255, 255, 0.15);

  /* Motion */
  --t-fast: 0.15s;
  --t-med: 0.2s;
  --t-flip: 0.6s;
  --t-logo: 0.06s;
  --e-smooth: cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Mobile breakpoint */
  --bp-mobile: 600px;

  /* About image */
  --photo-size: 200px;
  --photo-size-mobile: 150px;

  /* Mobile spacing knobs */
  --intro-height-mobile: 220vh;
  --intro-sticky-height-mobile: 210vh;
  --mobile-logo-top-pad: 80px;
  --mobile-layout-gap: 60px;
  --mobile-cards-gap: 80px;

  /* About section spacing */
  --about-gap: 32px;
  --about-mb: 64px;
}

/* =========================
   Global
========================= */
* {
  box-sizing: border-box;
}
html,
body {
  min-height: 100vh;
}

body {
  margin: 0;
  background-color: var(--c-bg);
  background-image:
    repeating-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.02) 0 1px,
      transparent 1px 4px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(0, 0, 0, 0.35) 0 1px,
      transparent 1px 4px
    );
  color: var(--c-fg);
  font-family: var(--font-base);
  width: 100%;
  overflow-x: hidden;
  overscroll-behavior: none;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;

  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23grain)' opacity='0.035'/%3E%3C/svg%3E");
  background:
    radial-gradient(
      ellipse at top left,
      rgba(120, 0, 0, 0.02),
      transparent 65%
    ),
    radial-gradient(
      ellipse at top right,
      rgba(120, 0, 0, 0.02),
      transparent 65%
    ),
    radial-gradient(
      ellipse at bottom left,
      rgba(120, 0, 0, 0.04),
      transparent 70%
    ),
    radial-gradient(
      ellipse at bottom right,
      rgba(120, 0, 0, 0.04),
      transparent 70%
    );

  filter: blur(40px);
}

/* =========================
   Intro stage
========================= */
.intro-stage {
  height: var(--intro-height);
  position: relative;
  overflow-x: clip;
}

.intro-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--intro-pad);
  overflow-x: clip;
}

.intro-layout {
  width: min(var(--stage-max), calc(100% - var(--gutter)));
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  justify-items: center;
}

.scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  font-size: 24px;
  letter-spacing: 2px;
  opacity: 0.7;
  animation: float 1.8s ease-in-out infinite;
  pointer-events: none;
}

.scroll-hint i {
  display: block;
  font-size: 28px;
  margin-top: 4px;
  transition: opacity 0.3s ease;
}

@keyframes float {
  0% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, 8px);
  }
  100% {
    transform: translate(-50%, 0);
  }
}

/* Logo */
.hero-logo-img {
  width: var(--logo-w);
  height: auto;
  max-width: 120%;
  will-change: transform, opacity;

  /* scale: 1 -> --logo-scale-min as --p goes 0->1 */
  transform: scale(calc(1 - (var(--p) * (1 - var(--logo-scale-min)))));
  opacity: calc(1 - (var(--p) * var(--logo-opacity-drop)));
  transition:
    transform var(--t-logo) linear,
    opacity var(--t-logo) linear;
}

/* Cards side containers */
.cards-side {
  display: flex;
  flex-direction: row;
  gap: var(--pair-gap);
  align-items: center;
  justify-content: center;

  /*opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-med) ease;*/
}

.cards-side.left {
  padding-right: var(--side-offset);
}
.cards-side.right {
  padding-left: var(--side-offset);
}

.cards-side.show {
  opacity: 1;
  pointer-events: auto;
}

.cards-side .card {
  opacity: 0;
  transition: opacity 0.35s ease;
}

.cards-side.show .card {
  opacity: 1;
}

/* =========================
   Playing card component
========================= */
.card {
  width: var(--card-w);
  height: var(--card-h);
  perspective: 1200px;
  cursor: pointer;
  user-select: none;

  opacity: 0; /* animated in JS */
  transform: translateX(0) rotate(0deg);
  transition:
    opacity 0.35s ease,
    transform 0.55s var(--e-smooth);

  --title-rot: 0deg;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform var(--t-flip) var(--e-smooth);
  border-radius: var(--r-card);
  will-change: transform;
}

.card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  border-radius: var(--r-card);
  border: 1px solid var(--c-border-card);
  background: var(--c-card-front-bg);
  color: var(--c-card-front-fg);
  box-shadow: var(--shadow-card);
  backface-visibility: hidden;

  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  text-align: center;
}

.card-face::before,
.card-face::after {
  content: attr(data-corner);
  position: absolute;
  font-size: var(--fs-corner);
  letter-spacing: 0.8px;
  color: var(--suit-color);
}
.card-face::before {
  top: 12px;
  left: 12px;
}
.card-face::after {
  bottom: 12px;
  right: 12px;
  transform: rotate(180deg);
}

.card-front h3 {
  margin: 0;
  font-size: var(--fs-card-title);
  letter-spacing: 0.4px;
  line-height: var(--lh-card-title);
  font-family: var(--font-card);
  font-weight: 400;
  color: var(--c-card-front-fg);
  transform: rotate(var(--title-rot));
  transform-origin: center;
  white-space: pre-line;
}

/* Card back */
.card-back {
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  background: var(--c-card-back-bg);
  color: var(--c-card-back-fg);
}

.card-back::before,
.card-back::after {
  content: none;
}

.card-back .links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 80%;
}

.card-back a {
  display: block;
  text-align: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;

  font-weight: 500;
  font-size: var(--fs-link);
  text-decoration: none;

  padding: 8px 14px;
  border-radius: var(--r-link);

  color: var(--c-link);
  background: transparent;
  border: 1px solid var(--c-link);

  transition:
    background var(--t-med) ease,
    color var(--t-med) ease,
    transform var(--t-fast) ease;
}

.card-back a:hover {
  background: var(--c-link-hover-bg);
  color: var(--c-link-hover-fg);
  box-shadow: var(--shadow-focus);
}

.card-back a:active {
  transform: scale(0.97);
}

/* =========================
   About + Footer
========================= */
.section-title {
  width: min(var(--content-max), 92vw);
  margin: 0 auto 18px;
  font-size: var(--fs-section-title);
  letter-spacing: 0.4px;
}

#about {
  display: flex;
  align-items: center;
  gap: var(--about-gap);
  width: min(var(--content-max), 92vw);
  margin: 0 auto var(--about-mb);
}

#about p {
  text-align: justify;
}

.about-card {
  background-color: rgba(255, 255, 255, 0.04);
}

.about-card {
  width: min(var(--content-max), 92vw);
  margin: 0 auto;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-about);
  padding: 18px;
  color: var(--c-muted);
  line-height: var(--lh-body);
}

.about-card a:link,
.about-card a:visited {
  color: var(--c-link);
  text-decoration: underline;
  font-family: var(--font-special);
}

.about-photo {
  width: var(--photo-size);
  height: var(--photo-size);
  border-radius: var(--r-photo);
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.footer {
  border-top: none; /*1px solid rgba(255, 255, 255, 0.08);*/
  position: relative;
  padding: 10px 0;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.35),
    transparent
  );
}

.footer-inner {
  width: min(var(--content-max), 92vw);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

footer a {
  color: var(--c-fg);
  text-decoration: none;
}

footer a:hover {
  color: var(--c-fg);
}

/* =========================
   Mobile
========================= */
@media (max-width: 600px) {
  :root {
    --c-bg: #0c0c0c;
  }

  .intro-stage {
    height: var(--intro-height-mobile);
  }

  .intro-sticky {
    position: relative;
    height: var(--intro-sticky-height-mobile);
    justify-content: flex-start;
    padding: 0;
  }

  .hero-logo-img {
    display: block;
    width: min(600px, 100vw);
    height: auto;
    max-height: 60vh;
    background: transparent;
  }

  .intro-layout {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
      "logo"
      "left"
      "right";
    gap: var(--mobile-layout-gap);
    width: min(520px, calc(100% - 24px));
    margin: 0 auto;
    justify-items: center;
    padding-bottom: 20px;
  }

  .hero-logo-container {
    grid-area: logo;
  }
  .cards-side.left {
    grid-area: left;
  }
  .cards-side.right {
    grid-area: right;
  }

  .cards-side {
    opacity: 1;
    pointer-events: auto;
    transition: none;
    flex-direction: column;
    gap: var(--mobile-cards-gap);
    padding: 0;
    margin: 0;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
  }

  .card {
    width: var(--card-w-mobile);
    height: var(--card-h-mobile);
    -webkit-tap-highlight-color: transparent;
    outline: none;
  }

  #about {
    flex-direction: column;
    text-align: center;
    margin-top: 10px;
  }

  #about p {
    text-align: justify;
  }

  .about-card {
    background-color: rgba(255, 255, 255, 0.09);
  }

  .about-photo {
    margin-top: 10px;
    margin-bottom: 20px;
    width: var(--photo-size-mobile);
    height: var(--photo-size-mobile);
  }

  .footer {
    padding: 25px 0;
  }

  .footer-inner p {
    margin: 0;
  }
}