/* =========================================================
   Watt & Why — innovative.land
   Palette : deep indigo night, signal amber, trace blue
   Type    : Bricolage Grotesque (display) / IBM Plex Sans (body)
             IBM Plex Mono (labels, data)
   ========================================================= */

:root {
  --ink:      #0E0B1F;
  --ink-2:    #16112F;
  --ink-3:    #241C52;
  --paper:    #F3F0FF;
  --muted:    #A099CE;
  --signal:   #FFC24B;
  --trace:    #7FB2FF;

  --display: "Bricolage Grotesque", "Trebuchet MS", sans-serif;
  --body:    "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, "Courier New", monospace;

  --wrap: 1120px;
  --pad:  clamp(1.25rem, 5vw, 3rem);
  --r:    14px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(900px 500px at 15% -10%, rgba(127,178,255,.13), transparent 60%),
    radial-gradient(700px 420px at 92% 4%, rgba(255,194,75,.10), transparent 65%);
  background-repeat: no-repeat;
}

img { max-width: 100%; display: block; }
a   { color: var(--paper); }

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem; top: 1rem;
  z-index: 99;
  background: var(--signal);
  color: var(--ink);
  padding: .6rem 1rem;
  border-radius: 8px;
  font-weight: 600;
}

/* ---------- masthead ---------- */

.masthead {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 1.4rem var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  color: var(--signal);
}
.brand__name {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -.02em;
  color: var(--paper);
}
.brand__name em { color: var(--signal); font-style: normal; }
.brand__eye { transform-origin: center; }
.brand:hover .brand__eye { animation: blink .5s steps(1, end); }
.brand:hover .brand__eye--b { animation-delay: .08s; }
@keyframes blink { 0%,100% { opacity: 1 } 40% { opacity: .15 } }

.nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-size: .95rem;
}
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--paper); }
.nav .btn { color: var(--ink); }

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  background: var(--signal);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  padding: .85rem 1.5rem;
  border-radius: 999px;
  border: 2px solid var(--signal);
  transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-2px); background: #FFD37B; border-color: #FFD37B; }
.btn--sm    { padding: .45rem 1rem; font-size: .9rem; }
.btn--ghost { background: transparent; color: var(--paper); border-color: var(--ink-3); }
.btn--ghost:hover { background: transparent; border-color: var(--trace); color: var(--trace); }

/* ---------- shared section furniture ---------- */

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--pad); }

.block { padding-block: clamp(3.5rem, 8vw, 6rem); }
.block + .block { border-top: 1px solid var(--ink-3); }

.eyebrow {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--trace);
  margin: 0 0 .9rem;
}

.h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -.025em;
  margin: 0 0 .8rem;
}

.lede { color: var(--muted); max-width: 60ch; margin: 0 0 2rem; }

/* ---------- hero ---------- */

.hero { padding-block: clamp(2.5rem, 7vw, 5rem) clamp(3rem, 7vw, 5rem); }

.hero__label {
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.4rem;
}
.hero__label b { color: var(--signal); font-weight: 500; }

.hero__q {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7.2vw, 4.6rem);
  line-height: 1.03;
  letter-spacing: -.035em;
  margin: 0;
  max-width: 17ch;
  min-height: 3.15em;
}
.hero__q span { position: relative; }
.hero__q .mark { color: var(--signal); }

.hero__caret {
  display: inline-block;
  width: .06em;
  height: .82em;
  background: var(--signal);
  vertical-align: -.06em;
  margin-left: .1em;
  animation: caret 1s steps(1) infinite;
}
@keyframes caret { 0%,50% { opacity: 1 } 51%,100% { opacity: 0 } }

.hero__answer {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 54ch;
  margin: 1.8rem 0 2.2rem;
}
.hero__answer strong { color: var(--paper); font-weight: 600; }

.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.feature {
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: 18px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color .18s ease, transform .18s ease;
}
.feature:hover { border-color: var(--signal); transform: translateY(-3px); }
.feature__tag {
  display: block;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--trace);
  padding: .9rem 1.1rem .1rem;
}
.feature__shot { aspect-ratio: 16 / 9; margin: .8rem 0 0; background: var(--ink-3); }
.feature__shot img { width: 100%; height: 100%; object-fit: cover; }
.feature__q {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.15rem;
  line-height: 1.25;
  letter-spacing: -.015em;
  margin: 0;
  padding: 1rem 1.1rem 1.2rem;
}

.hero__meta {
  margin-top: 2.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem 2.4rem;
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--muted);
}
.hero__meta b { display: block; color: var(--paper); font-weight: 500; font-size: .95rem; }

/* ---------- episode grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.6rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.card {
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color .18s ease, transform .18s ease;
}
.card:hover { border-color: var(--signal); transform: translateY(-3px); }

.card__link { text-decoration: none; color: inherit; display: block; }

.card__shot { position: relative; aspect-ratio: 16 / 9; background: var(--ink-3); }
.card__shot img { width: 100%; height: 100%; object-fit: cover; }
.card__play {
  position: absolute;
  inset: auto .7rem .7rem auto;
  background: rgba(14,11,31,.82);
  color: var(--signal);
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .1em;
  padding: .25rem .55rem;
  border-radius: 6px;
}

.card__body { padding: 1.1rem 1.15rem 1.3rem; }
.card__q {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.12rem;
  line-height: 1.25;
  letter-spacing: -.015em;
  margin: 0 0 .6rem;
}
.card__date {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

.empty {
  border: 1px dashed var(--ink-3);
  border-radius: var(--r);
  padding: 2rem;
  color: var(--muted);
  text-align: center;
}

/* ---------- three-up pillars ---------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin: 0;
  padding: 0;
}
.pillar__t {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.2rem;
  letter-spacing: -.015em;
  margin: 0 0 .5rem;
  color: var(--signal);
}
.pillar p { color: var(--muted); margin: 0; }

/* ---------- FAQ ---------- */

.faq { border-top: 1px solid var(--ink-3); }
.faq details {
  border-bottom: 1px solid var(--ink-3);
  padding: 1.15rem 0;
}
.faq summary {
  cursor: pointer;
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.1rem;
  letter-spacing: -.01em;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--signal); font-family: var(--mono); }
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--muted); margin: .8rem 0 0; max-width: 68ch; }

/* ---------- closing CTA ---------- */

.cta {
  text-align: center;
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: 22px;
  padding: clamp(2.2rem, 6vw, 3.6rem);
  margin: clamp(3rem, 7vw, 5rem) 0;
}
.cta .h2 { margin-inline: auto; max-width: 18ch; }
.cta .lede { margin-inline: auto; text-align: center; }

/* ---------- article ---------- */

.article { max-width: 44rem; margin-inline: auto; padding-block: 3rem 4rem; }
.article h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -.03em;
  margin: .4rem 0 1rem;
}
.article h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -.02em;
  margin: 2.6rem 0 .7rem;
  color: var(--signal);
}
.article p  { margin: 0 0 1.15rem; }
.article ul { margin: 0 0 1.15rem; padding-left: 1.2rem; }
.article li { margin-bottom: .45rem; }
.article a  { color: var(--trace); }
.article .byline {
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.article .pull {
  border-left: 3px solid var(--signal);
  padding-left: 1.2rem;
  margin: 2rem 0;
  font-family: var(--display);
  font-size: 1.3rem;
  line-height: 1.35;
  letter-spacing: -.02em;
}
.article .embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--r);
  overflow: hidden;
  border: 1px solid var(--ink-3);
  margin: 2rem 0;
}
.article .embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--ink-3);
  padding: 3rem var(--pad) 2rem;
  max-width: var(--wrap);
  margin: 0 auto;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2rem;
}
.footer__mark {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.2rem;
  margin: 0 0 .5rem;
}
.footer__mark em { color: var(--signal); font-style: normal; }
.footer__line { color: var(--muted); font-size: .92rem; max-width: 42ch; margin: 0; }
.footer__head {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--trace);
  margin: 0 0 .7rem;
}
.footer nav a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  font-size: .92rem;
  margin-bottom: .4rem;
}
.footer nav a:hover { color: var(--paper); }
.footer__legal {
  margin: 2.5rem 0 0;
  font-family: var(--mono);
  font-size: .76rem;
  color: var(--muted);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .footer__grid { grid-template-columns: 1fr; }
  .nav { gap: 1rem; font-size: .9rem; width: 100%; justify-content: flex-start; }
  .hero__q { max-width: none; min-height: 2.95em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}