@font-face {
  font-family: "League Gothic";
  src: url("../fonts/league_gothic-webfont.woff") format("woff"),
       url("../fonts/league_gothic-webfont.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;
  --bg-center: #ffffff;
  --bg-edge: #f7f2d3;
  --bg-fallback: #f7f3de;
  --fg: #333333;
  --link: #8b743d;
  --link-hover: #c0a86e;
  --code-bg: #3f3f3f;
  --code-fg: #dcdcdc;
  --code-string: #cc9393;
  --nav-color: rgba(139, 116, 61, 0.6);
  --nav-color-hover: #c0a86e;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

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

body {
  background-color: var(--bg-fallback);
  background: radial-gradient(circle at center, var(--bg-center) 0%, var(--bg-edge) 100%);
  color: var(--fg);
  font-family: "Lato", sans-serif;
  font-weight: 400;
  letter-spacing: -0.02em;
  overflow: hidden;
}

.deck {
  height: 100vh;
  height: 100dvh;
  width: 100%;
  position: relative;
}

.slide {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  padding: 4rem 6vw 7rem;
  text-align: center;
}

.slide.active {
  display: flex;
}

.slide h1,
.slide h2 {
  margin: 0;
  color: var(--fg);
  font-family: "League Gothic", Impact, sans-serif;
  font-weight: normal;
  line-height: 0.9;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.slide h1 {
  font-size: clamp(3rem, 11vw, 8.5rem);
  text-shadow:
    0 1px 0 #cccccc,
    0 2px 0 #c9c9c9,
    0 3px 0 #bbbbbb,
    0 4px 0 #b9b9b9,
    0 5px 0 #aaaaaa,
    0 6px 1px rgba(0, 0, 0, 0.1),
    0 0 5px rgba(0, 0, 0, 0.1),
    0 1px 3px rgba(0, 0, 0, 0.3),
    0 3px 5px rgba(0, 0, 0, 0.2),
    0 5px 10px rgba(0, 0, 0, 0.25),
    0 20px 20px rgba(0, 0, 0, 0.15);
}

.slide h2 {
  font-size: clamp(2.25rem, 8vw, 4.75rem);
}

.slide .subtitle {
  font-family: "League Gothic", Impact, sans-serif;
  font-weight: normal;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--fg);
  font-size: clamp(1.75rem, 6vw, 3.5rem);
  margin-top: -0.3rem;
}

.slide p {
  max-width: 46rem;
  line-height: 1.5;
  margin: 0;
  font-size: clamp(1.15rem, 3.4vw, 2.25rem);
}

.slide .byline {
  font-size: clamp(0.95rem, 2.2vw, 1.5rem);
  margin-top: 0.5rem;
}

.slide .note {
  font-size: clamp(0.95rem, 2.4vw, 1.4rem);
  max-width: 44rem;
}

.slide a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.15s ease;
}

.slide a:hover {
  color: var(--link-hover);
}

.slide code {
  font-family: "Consolas", "Menlo", "Monaco", monospace;
}

.slide p > code,
.slide .note code {
  background: rgba(139, 116, 61, 0.12);
  color: var(--link);
  padding: 0.1rem 0.4rem;
  border-radius: 0.2rem;
  font-size: 0.85em;
}

.slide pre {
  display: block;
  width: 90%;
  max-width: 50rem;
  margin: 0.15rem auto;
  background: var(--code-bg);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.3);
  text-align: left;
}

.slide pre code {
  display: block;
  color: var(--code-fg);
  padding: 0.6rem 0.9rem;
  font-size: clamp(0.85rem, 2.6vw, 1.24rem);
  line-height: 1.3;
  white-space: pre-wrap;
  word-break: break-word;
}

.slide img {
  margin: 0.5rem 0;
  border: 4px solid var(--fg);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}

.slide .license {
  color: var(--fg);
  font-size: 0.85rem;
  line-height: 1.7;
}

.slide .license img {
  border: 0;
  box-shadow: none;
  vertical-align: middle;
  margin-right: 0.4rem;
  margin-top: 0;
}

.deck-nav {
  position: fixed;
  right: calc(1.5rem + env(safe-area-inset-right, 0px));
  bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 10;
}

.deck-nav button {
  background: transparent;
  color: var(--nav-color);
  border: none;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.15s ease;
}

.deck-nav button:not(:disabled):hover {
  color: var(--nav-color-hover);
}

.deck-nav button:disabled {
  opacity: 0.25;
  cursor: default;
}

.slide-counter {
  min-width: 3rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--nav-color);
  font-size: 0.8rem;
}

.progress-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  height: 4px;
  width: 100%;
  background: rgba(0, 0, 0, 0.1);
  z-index: 10;
}

.progress-bar span {
  display: block;
  height: 100%;
  background: var(--link);
  transition: width 0.4s ease;
}

@media (max-width: 480px) {
  .slide {
    padding: 3rem 1.25rem 6rem;
  }
}