/* ============================================================================
   KOIOS Kitchen Guide — design system
   Visual language borrowed from the KOIOS wordmark: thin rounded geometric
   strokes, warm amber-orange on clean white, circular "O" ring motif.
   Namespace: koi-* / .frame — unique to this build.
   ========================================================================== */
:root {
  --amber: #f7941e;
  --amber-deep: #e07800;
  --amber-soft: #fff4e5;
  --amber-line: #ffdcae;
  --ink: #232733;
  --ink-soft: #5c6270;
  --paper: #ffffff;
  --cream: #fffaf2;
  --line: #eee7dc;
  --radius: 22px;
  --shadow: 0 10px 30px -12px rgba(35, 39, 51, .14);
  --shadow-lg: 0 24px 60px -20px rgba(224, 120, 0, .22);
  --font-disp: 'Quicksand', sans-serif;
  --font-body: 'Nunito Sans', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--amber-deep); text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-disp); font-weight: 700; line-height: 1.18; color: var(--ink); }

.frame { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.frame--slim { max-width: 820px; }

/* ---------- buttons ---------- */
.koi-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-disp); font-weight: 700; font-size: 15px;
  padding: 12px 26px; border-radius: 999px; white-space: nowrap;
  background: var(--amber); color: #fff;
  border: 2px solid var(--amber);
  transition: background .18s, border-color .18s, transform .18s, box-shadow .18s;
}
.koi-btn:hover { background: var(--amber-deep); border-color: var(--amber-deep); transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.koi-btn--ghost { background: transparent; color: var(--amber-deep); }
.koi-btn--ghost:hover { background: var(--amber-soft); color: var(--amber-deep); box-shadow: none; }
.koi-btn--big { padding: 15px 34px; font-size: 16px; }

/* ---------- header ---------- */
.koi-top {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.koi-top__bar { display: flex; align-items: center; justify-content: space-between; gap: 28px; height: 76px; }

.koi-mark { display: inline-flex; flex-direction: column; align-items: flex-start; line-height: 1; }
.koi-mark__logo { display: block; height: 27px; width: auto; color: var(--amber); }
.koi-mark__sub {
  font-family: var(--font-body); font-weight: 700; font-size: 10px;
  letter-spacing: .32em; color: var(--ink-soft); text-transform: uppercase; margin-top: 6px;
}
.koi-mark--foot .koi-mark__logo { color: #fff; }
.koi-mark--foot .koi-mark__sub { color: rgba(255, 255, 255, .55); }

.koi-nav { display: flex; align-items: center; gap: 17px; }
.koi-nav a { font-family: var(--font-disp); font-weight: 600; font-size: 14.5px; color: var(--ink); transition: color .15s; white-space: nowrap; }
.koi-nav a:hover, .koi-nav a[aria-current] { color: var(--amber-deep); }
.koi-nav .koi-btn { color: #fff; }
.koi-nav .koi-btn:hover { color: #fff; }
.koi-burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.koi-burger i { display: block; width: 24px; height: 2.5px; border-radius: 3px; background: var(--ink); margin: 5px 0; }

/* ---------- hero ---------- */
.koi-hero { position: relative; overflow: hidden; background: var(--cream); }
.koi-hero__bg { position: absolute; inset: 0; }
.koi-hero__bg img { width: 100%; height: 100%; object-fit: cover; object-position: center 62%; }
.koi-hero__bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(255, 250, 242, .97) 0%, rgba(255, 250, 242, .88) 42%, rgba(255, 250, 242, .25) 78%, rgba(255, 250, 242, .05) 100%);
}
.koi-hero__inner { position: relative; padding: 92px 0 100px; max-width: 590px; }
.koi-kicker {
  display: inline-block; font-family: var(--font-disp); font-weight: 700; font-size: 13px;
  letter-spacing: .22em; text-transform: uppercase; color: var(--amber-deep);
  background: var(--amber-soft); border: 1.5px solid var(--amber-line);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 22px;
}
.koi-hero h1 { font-size: clamp(34px, 5vw, 54px); font-weight: 700; margin-bottom: 18px; }
.koi-hero h1 em { font-style: normal; color: var(--amber); }
.koi-hero p { font-size: 19px; color: var(--ink-soft); margin-bottom: 30px; max-width: 480px; }
.koi-hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- category chips row ---------- */
.koi-cats { margin-top: -44px; position: relative; z-index: 5; }
.koi-cats__row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.koi-chip {
  display: flex; align-items: center; gap: 14px;
  background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--shadow);
  transition: border-color .18s, transform .18s;
}
.koi-chip:hover { border-color: var(--amber); transform: translateY(-3px); }
.koi-chip__ring {
  flex: 0 0 52px; width: 52px; height: 52px; border-radius: 50%;
  border: 2px solid var(--amber); color: var(--amber-deep);
  display: grid; place-items: center; background: var(--amber-soft);
}
.koi-chip__ring svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.koi-chip b { display: block; font-family: var(--font-disp); font-size: 16px; color: var(--ink); }
.koi-chip span { font-size: 13.5px; color: var(--ink-soft); }

/* ---------- section head ---------- */
.koi-shead { text-align: center; max-width: 640px; margin: 0 auto 46px; }
.koi-shead .koi-kicker { margin-bottom: 14px; }
.koi-shead h2 { font-size: clamp(27px, 3.4vw, 38px); margin-bottom: 12px; }
.koi-shead p { color: var(--ink-soft); }

section { padding: 84px 0; }
.koi-tint { background: var(--cream); }

/* ---------- why / perks ---------- */
.koi-why__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.koi-why__item { text-align: center; padding: 34px 22px; border: 1.5px dashed var(--amber-line); border-radius: var(--radius); background: #fff; }
.koi-why__ring {
  width: 74px; height: 74px; margin: 0 auto 18px; border-radius: 50%;
  border: 2.5px solid var(--amber); display: grid; place-items: center; color: var(--amber-deep);
  background: var(--amber-soft);
}
.koi-why__ring svg { width: 34px; height: 34px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.koi-why__item h3 { font-size: 19px; margin-bottom: 8px; }
.koi-why__item p { font-size: 15px; color: var(--ink-soft); }

/* ---------- product cards ---------- */
.koi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.koi-grid--3 { grid-template-columns: repeat(3, 1fr); max-width: 900px; margin: 0 auto; }
.koi-card {
  background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .18s, transform .18s, box-shadow .18s;
}
.koi-card:hover { border-color: var(--amber); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.koi-card__pic { position: relative; background: #fff; padding: 26px; }
.koi-card__pic img { width: 100%; height: 210px; object-fit: contain; }
.koi-flag {
  position: absolute; top: 14px; left: 14px;
  font-family: var(--font-disp); font-weight: 700; font-size: 11.5px; letter-spacing: .08em;
  text-transform: uppercase; color: #fff; background: var(--amber);
  padding: 5px 12px; border-radius: 999px;
}
.koi-card__body { padding: 6px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.koi-card__cat { font-size: 12.5px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--amber-deep); margin-bottom: 8px; }
.koi-card__name { font-size: 16px; font-family: var(--font-disp); line-height: 1.4; margin-bottom: 10px; }
.koi-card__name a { color: var(--ink); }
.koi-card__name a:hover { color: var(--amber-deep); }
.koi-stars { color: var(--amber); letter-spacing: 2px; font-size: 14px; }
.koi-card__meta { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 14px; }
.koi-card__row { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.koi-price { font-family: var(--font-disp); font-weight: 700; font-size: 22px; color: var(--ink); }
.koi-card__row .koi-btn { padding: 10px 18px; font-size: 14px; }

/* ---------- steps ---------- */
.koi-steps__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; counter-reset: koi-step; }
.koi-step {
  position: relative; background: #fff; border: 1.5px solid var(--line);
  border-radius: var(--radius); padding: 38px 28px 30px; counter-increment: koi-step;
}
.koi-step::before {
  content: counter(koi-step, decimal-leading-zero);
  position: absolute; top: -22px; left: 26px;
  font-family: var(--font-disp); font-weight: 700; font-size: 15px;
  color: var(--amber-deep); background: var(--amber-soft);
  border: 2px solid var(--amber); border-radius: 999px; padding: 6px 15px;
}
.koi-step h3 { font-size: 20px; margin-bottom: 8px; }
.koi-step p { font-size: 15.5px; color: var(--ink-soft); }

/* ---------- banner band ---------- */
.koi-band { padding: 0; }
.koi-band__wrap {
  position: relative; border-radius: calc(var(--radius) + 6px); overflow: hidden;
  min-height: 340px; display: flex; align-items: center;
  box-shadow: var(--shadow-lg);
}
.koi-band__wrap img.koi-band__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.koi-band__scrim { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(35, 39, 51, .78) 0%, rgba(35, 39, 51, .45) 55%, rgba(35, 39, 51, .08) 100%); }
.koi-band__copy { position: relative; padding: 56px; max-width: 520px; }
.koi-band__copy .koi-kicker { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .3); color: #ffd9a3; }
.koi-band__copy h2 { color: #fff; font-size: clamp(26px, 3vw, 36px); margin-bottom: 14px; }
.koi-band__copy p { color: rgba(255, 255, 255, .85); margin-bottom: 26px; }

/* ---------- quotes ---------- */
.koi-quotes__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.koi-quote {
  background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; display: flex; flex-direction: column; gap: 14px;
}
.koi-quote__stars { color: var(--amber); font-size: 16px; letter-spacing: 3px; }
.koi-quote blockquote { font-size: 15.5px; color: var(--ink-soft); font-style: italic; }
.koi-quote figcaption { display: flex; flex-direction: column; }
.koi-quote__name { font-family: var(--font-disp); font-weight: 700; font-size: 15px; }
.koi-quote__tag { font-size: 13px; color: var(--ink-soft); }
.koi-quotes__score { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-disp); font-size: 19px; }

/* ---------- faq ---------- */
.koi-faq__list { max-width: 760px; margin: 0 auto; display: grid; gap: 14px; }
.koi-faq__item { background: #fff; border: 1.5px solid var(--line); border-radius: 18px; padding: 4px 24px; }
.koi-faq__item[open] { border-color: var(--amber); }
.koi-faq__item summary {
  cursor: pointer; list-style: none; position: relative;
  font-family: var(--font-disp); font-weight: 700; font-size: 16.5px; padding: 16px 40px 16px 0;
}
.koi-faq__item summary::-webkit-details-marker { display: none; }
.koi-faq__item summary::after {
  content: '+'; position: absolute; right: 2px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--amber);
  color: var(--amber-deep); display: grid; place-items: center; font-size: 18px; font-weight: 600;
}
.koi-faq__item[open] summary::after { content: '−'; background: var(--amber); color: #fff; }
.koi-faq__item p { padding: 0 0 18px; color: var(--ink-soft); font-size: 15.5px; }

/* ---------- final CTA ---------- */
.koi-final { background: linear-gradient(135deg, var(--amber) 0%, var(--amber-deep) 100%); text-align: center; }
.koi-final h2 { color: #fff; font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 12px; }
.koi-final p { color: rgba(255, 255, 255, .9); max-width: 520px; margin: 0 auto 28px; }
.koi-final .koi-btn { background: #fff; border-color: #fff; color: var(--amber-deep); }
.koi-final .koi-btn:hover { background: var(--cream); box-shadow: 0 18px 40px -14px rgba(0, 0, 0, .35); }

/* ---------- breadcrumbs & doc pages ---------- */
.koi-path { display: flex; flex-wrap: wrap; gap: 8px; font-size: 13.5px; margin-bottom: 26px; color: var(--ink-soft); }
.koi-path a { color: var(--ink-soft); }
.koi-path a:hover { color: var(--amber-deep); }
.koi-path .sep { color: var(--amber); }
.koi-path .cur { color: var(--ink); font-weight: 700; }
.koi-doc { padding: 64px 0; }
.koi-doc__title { font-size: clamp(30px, 4vw, 42px); margin-bottom: 18px; }
.koi-doc__body .lead { font-size: 19px; color: var(--ink-soft); margin-bottom: 26px; }
.koi-doc__body h3 { font-size: 22px; margin: 30px 0 10px; }
.koi-doc__body p { margin-bottom: 14px; color: var(--ink-soft); }
.koi-doc__body ul { margin: 0 0 16px 22px; color: var(--ink-soft); }
.koi-doc__body li { margin-bottom: 8px; }

/* ---------- product detail ---------- */
.koi-pdp { padding: 56px 0 72px; }
.koi-pdp__grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 56px; align-items: start; }
.koi-pdp__pic {
  background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 36px; position: sticky; top: 100px;
}
.koi-pdp__pic img { width: 100%; height: 420px; object-fit: contain; }
.koi-pdp__cat { font-size: 13px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--amber-deep); }
.koi-pdp h1 { font-size: clamp(23px, 2.6vw, 31px); margin: 10px 0 14px; }
.koi-pdp__score { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--ink-soft); margin-bottom: 22px; }
.koi-pdp__buy {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  background: var(--amber-soft); border: 1.5px solid var(--amber-line); border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 26px;
}
.koi-pdp__price { font-family: var(--font-disp); font-weight: 700; font-size: 34px; }
.koi-pdp__price span { display: block; font-family: var(--font-body); font-weight: 600; font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
.koi-pdp__list { list-style: none; display: grid; gap: 12px; margin-bottom: 22px; }
.koi-pdp__list li { position: relative; padding-left: 30px; font-size: 15.5px; color: var(--ink-soft); }
.koi-pdp__list li::before {
  content: ''; position: absolute; left: 0; top: 5px; width: 14px; height: 14px;
  border: 2.5px solid var(--amber); border-radius: 50%;
}
.koi-pdp__note { font-size: 13px; color: var(--ink-soft); border-top: 1px dashed var(--amber-line); padding-top: 16px; }

/* ---------- footer ---------- */
.koi-foot { background: var(--ink); color: rgba(255, 255, 255, .75); padding: 64px 0 30px; }
.koi-foot__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 44px; margin-bottom: 44px; }
.koi-foot__brand p { margin-top: 16px; font-size: 14.5px; max-width: 340px; }
.koi-foot__col h4 { color: #fff; font-size: 15px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 16px; }
.koi-foot__col a { display: block; color: rgba(255, 255, 255, .72); font-size: 14.5px; margin-bottom: 10px; }
.koi-foot__col a:hover { color: var(--amber); }
.koi-foot__base { border-top: 1px solid rgba(255, 255, 255, .14); padding-top: 24px; }
.koi-foot__base p { font-size: 12.5px; color: rgba(255, 255, 255, .5); margin-bottom: 8px; }
.koi-foot__base a { color: rgba(255, 255, 255, .7); }
.koi-foot__base a:hover { color: var(--amber); }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .koi-grid { grid-template-columns: repeat(3, 1fr); }
  .koi-why__grid { grid-template-columns: repeat(2, 1fr); }
  .koi-cats__row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1120px) {
  .koi-burger { display: block; }
  .koi-nav {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 10px 24px 20px; display: none;
  }
  .koi-nav--open { display: flex; }
  .koi-nav a { padding: 10px 0; font-size: 17px; }
}
@media (max-width: 820px) {
  .koi-grid, .koi-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .koi-steps__grid, .koi-quotes__grid { grid-template-columns: 1fr; }
  .koi-pdp__grid { grid-template-columns: 1fr; gap: 30px; }
  .koi-pdp__pic { position: static; }
  .koi-pdp__pic img { height: 300px; }
  .koi-foot__grid { grid-template-columns: 1fr; gap: 30px; }
  .koi-hero__inner { padding: 64px 0 84px; }
  .koi-hero__bg::after { background: linear-gradient(180deg, rgba(255, 250, 242, .96) 0%, rgba(255, 250, 242, .82) 100%); }
  section { padding: 60px 0; }
  .koi-band__copy { padding: 36px 28px; }
}
@media (max-width: 520px) {
  .koi-grid, .koi-grid--3 { grid-template-columns: 1fr; }
  .koi-cats__row { grid-template-columns: 1fr; }
  .koi-why__grid { grid-template-columns: 1fr; }
  .koi-mark__word { font-size: 22px; }
}