/* Yoshi Investor Whitepaper — deck theme. Edit freely; loaded as an external stylesheet. */

:root {
  --ink: #0a0b0e;
  --ink-2: #101218;
  --panel: #141821;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --fg: #edeff3;
  --fg-soft: #c6cbd4;
  --muted: #868d99;
  --accent: #ffc857;      /* egg-yolk amber */
  --accent-2: #5fe3b3;    /* mint */
  --accent-soft: rgba(255, 200, 87, 0.14);
  --display: "Fraunces", Georgia, serif;
  --body: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --maxw: 860px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--ink);
  color: var(--fg);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ambient glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(70% 55% at 78% -5%, rgba(255, 200, 87, 0.10), transparent 60%),
    radial-gradient(60% 50% at 12% 108%, rgba(95, 227, 179, 0.07), transparent 60%),
    linear-gradient(180deg, #0b0c11, #07080b);
  z-index: -1;
}

/* top progress */
#progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px var(--accent-soft);
  z-index: 50;
  transition: width 0.45s var(--ease);
}

#loading { color: var(--muted); padding: 4rem; font-size: 0.95rem; }

/* ── deck + slides ── */
#deck { position: relative; height: 100vh; width: 100%; }

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: clamp(2.5rem, 7vh, 6rem) 1.5rem 7.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.slide.active { opacity: 1; visibility: visible; transform: none; }
.slide::-webkit-scrollbar { width: 8px; }
.slide::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 8px; }

.slide-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: auto;
  position: relative;
}

/* faint section number */
.slide-num {
  font-family: var(--display);
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  font-weight: 600;
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1.3px var(--line-strong);
  margin: 0 0 1.4rem;
  letter-spacing: -0.02em;
  user-select: none;
}

/* ── typography ── */
h1, h2, h3 { font-family: var(--display); font-weight: 600; letter-spacing: -0.02em; color: #fff; }
.slide-inner > h2:first-of-type,
.slide-inner h2 {
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  line-height: 1.05;
  margin: 0 0 1.3rem;
}
.slide-inner h2 + h2 { color: var(--accent); font-size: clamp(1.3rem, 3vw, 1.8rem); margin-top: -0.6rem; }
.slide-inner h3 { font-size: 1.15rem; margin: 1.8rem 0 0.6rem; color: var(--fg); }

p { font-size: clamp(1rem, 1.35vw, 1.12rem); line-height: 1.66; color: var(--fg-soft); margin: 0 0 1rem; }
strong { color: #fff; font-weight: 600; }
em { color: var(--fg); }
a { color: var(--accent-2); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
a:hover { border-color: var(--accent-2); }

ul { margin: 0.4rem 0 1.2rem; padding-left: 0; list-style: none; }
li {
  position: relative;
  padding-left: 1.5rem;
  margin: 0.55rem 0;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.6;
  color: var(--fg-soft);
}
li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* inline placeholder + code */
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  padding: 0.1em 0.42em;
  border-radius: 5px;
  color: var(--accent-2);
}
.ph {
  font-family: var(--mono);
  font-size: 0.82em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px dashed rgba(255, 200, 87, 0.5);
  padding: 0.06em 0.45em;
  border-radius: 5px;
  letter-spacing: 0.02em;
}

/* code block / diagram */
pre {
  background: #0c0e13;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.2rem 1.3rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}
pre code {
  background: none; border: none; padding: 0;
  color: var(--accent-2);
  font-size: clamp(0.62rem, 1.15vw, 0.82rem);
  line-height: 1.5;
  white-space: pre;
}

/* mermaid diagrams */
.mermaid {
  display: flex;
  justify-content: center;
  margin: 0.5rem 0 1.5rem;
  padding: 1.3rem 1rem;
  background: #0c0e13;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow-x: auto;
}
.mermaid svg { max-width: 100%; height: auto; }
.mermaid .edgeLabel { color: var(--muted); }

/* tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1.4rem;
  font-size: clamp(0.84rem, 1.15vw, 0.97rem);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
thead th {
  text-align: left;
  font-family: var(--body);
  font-weight: 600;
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--line-strong);
  padding: 0.72rem 0.95rem;
  white-space: nowrap;
}
tbody td { padding: 0.68rem 0.95rem; border-bottom: 1px solid var(--line); color: var(--fg-soft); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(255, 255, 255, 0.025); }
td strong { color: var(--accent); }

/* blockquote = callout */
blockquote {
  margin: 1.2rem 0;
  padding: 1rem 1.3rem;
  background: linear-gradient(90deg, var(--accent-soft), transparent 90%);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
}
blockquote p { margin: 0; color: var(--fg); font-size: 1.05rem; }
blockquote p strong { color: var(--accent); }

/* ── cover slide ── */
.cover { text-align: center; }
.cover .slide-inner { max-width: 760px; }
.cover h1 {
  font-size: clamp(4rem, 16vw, 9rem);
  line-height: 0.86;
  margin: 0;
  background: linear-gradient(180deg, #fff 30%, var(--accent) 160%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cover h2 {
  font-size: clamp(1.3rem, 3.4vw, 2rem);
  font-weight: 400;
  color: var(--fg-soft);
  margin: 1.1rem 0 2rem;
}
.cover p { font-size: 0.85rem; letter-spacing: 0.32em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.cover .cover-meta { display: block; margin-top: 0.7rem; letter-spacing: 0.18em; color: var(--muted); font-weight: 500; }

/* ── bottom-center navigation ── */
#nav {
  position: fixed;
  bottom: clamp(1rem, 3vh, 1.8rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.45rem;
  background: rgba(18, 20, 27, 0.72);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}
.nav-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--fg);
  font-size: 1.15rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.2s, color 0.2s, transform 0.1s;
}
.nav-btn:hover:not(:disabled) { background: var(--accent); color: #1a1407; }
.nav-btn:active:not(:disabled) { transform: scale(0.92); }
.nav-btn:disabled { opacity: 0.28; cursor: default; }

.nav-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  min-width: 168px;
  padding: 0.25rem 1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  transition: background 0.2s;
}
.nav-label:hover { background: rgba(255, 255, 255, 0.06); }
#counter { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--accent); }
#pageName { font-size: 0.86rem; font-weight: 600; color: var(--fg); white-space: nowrap; }

/* ── jump-to-page (TOC) overlay ── */
#toc {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(6, 7, 10, 0.7);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none; /* don't eat clicks while invisible */
  transition: opacity 0.25s var(--ease);
  padding: 2rem;
}
#toc[hidden] { display: none; } /* id selector was overriding [hidden]'s display:none — restore it */
#toc.open { opacity: 1; pointer-events: auto; }
.toc-list {
  width: min(560px, 100%);
  max-height: 78vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 0.6rem;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6);
}
.toc-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  text-align: left;
  padding: 0.7rem 0.9rem;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: var(--fg-soft);
  font-family: var(--body);
  font-size: 0.98rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.toc-item:hover { background: var(--accent-soft); color: #fff; }
.toc-num { font-family: var(--mono); font-size: 0.72rem; color: var(--accent); min-width: 1.6rem; }

@media (max-width: 640px) {
  .slide { padding: 2rem 1.1rem 7rem; }
  .nav-label { min-width: 120px; }
  #pageName { font-size: 0.78rem; }
  table { font-size: 0.8rem; }
}