/* ============================================================
   ELEMENTAL STUDIOS — "The Human Element"
   Design system: dark cinematic, oxblood, grotesk + mono
   ============================================================ */

:root {
  /* palette */
  --ink:          #0a0807;
  --ink-2:        #100b0a;
  --ink-3:        #17100e;
  --oxblood:      #670c0d;
  --oxblood-2:    #8a1416;
  --oxblood-lite: #a5201f;
  --ember:        #e0563a;
  --ember-glow:   #ff6a45;
  --bone:         #f3ede6;
  --bone-dim:     #c9bcb2;
  --muted:        #8d817a;
  --line:         rgba(243,237,230,0.10);
  --line-2:       rgba(243,237,230,0.06);

  /* type */
  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* scale */
  --step--1: clamp(0.78rem, 0.74rem + 0.2vw, 0.9rem);
  --step-0:  clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  --step-1:  clamp(1.3rem, 1.1rem + 0.9vw, 1.9rem);
  --step-2:  clamp(1.9rem, 1.4rem + 2.2vw, 3rem);
  --step-3:  clamp(2.6rem, 1.6rem + 4.6vw, 5.2rem);
  --step-4:  clamp(3.4rem, 1.4rem + 9vw, 9rem);

  --maxw: 1280px;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset-ish ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }
body {
  font-family: var(--display);
  background: var(--ink);
  color: var(--bone);
  font-size: var(--step-0);
  line-height: 1.5;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: var(--oxblood-2); color: var(--bone); }

/* film grain + vignette overlays */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.035; mix-blend-mode: overlay;
}
.vignette {
  position: fixed; inset: 0; z-index: 9997; pointer-events: none;
  background: radial-gradient(120% 80% at 50% 0%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
section { position: relative; }
.eyebrow {
  font-family: var(--mono); font-size: var(--step--1); letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--ember); display: inline-flex; align-items: center; gap: 0.6em;
}
.eyebrow::before { content: ""; width: 1.8em; height: 1px; background: var(--oxblood-lite); }
.mono { font-family: var(--mono); letter-spacing: 0.05em; }

h1, h2, h3 { font-weight: 600; line-height: 1.02; letter-spacing: -0.02em; }
.display { font-size: var(--step-4); font-weight: 700; line-height: 0.92; letter-spacing: -0.035em; }

/* ---------- reveal animation base ---------- */
.reveal { opacity: 0; transform: translateY(28px); }
.reveal.in { opacity: 1; transform: none; transition: opacity 1s var(--ease), transform 1s var(--ease); }
.line-mask { overflow: hidden; display: block; }
.line-mask > span { display: block; transform: translateY(110%); }
.line-mask.in > span { transform: none; transition: transform 1.1s var(--ease); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem var(--gutter);
  transition: background 0.5s var(--ease), padding 0.5s var(--ease), border-color 0.5s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10,8,7,0.72); backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line-2); padding-top: 0.8rem; padding-bottom: 0.8rem;
}
.nav__brand { display: flex; align-items: center; gap: 0.7rem; opacity: 0; transition: opacity 0.6s var(--ease); }
.nav.reveal-brand .nav__brand { opacity: 1; }
.nav__brand img { height: 30px; width: auto; }
.nav__links { display: flex; align-items: center; gap: 2.2rem; }
.nav__links a { font-family: var(--mono); font-size: var(--step--1); letter-spacing: 0.14em; text-transform: uppercase; color: var(--bone-dim); position: relative; padding: 0.3rem 0; }
.nav__links a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 1px; background: var(--ember); transition: width 0.4s var(--ease); }
.nav__links a:hover { color: var(--bone); }
.nav__links a:hover::after { width: 100%; }
.nav__cta {
  font-family: var(--mono); font-size: var(--step--1); letter-spacing: 0.12em; text-transform: uppercase;
  border: 1px solid var(--line); padding: 0.6rem 1.1rem; border-radius: 100px; color: var(--bone);
  transition: background 0.4s var(--ease), border-color 0.4s, color 0.4s;
}
.nav__cta:hover { background: var(--oxblood); border-color: var(--oxblood-lite); }
.nav__burger { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero { height: 100svh; min-height: 640px; display: grid; place-items: center; text-align: center; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__bg video, .hero__bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.55; }
.hero__bg::after { content: ""; position: absolute; inset: 0; background: radial-gradient(90% 90% at 50% 45%, transparent 30%, var(--ink) 82%); }
.hero__sting {
  position: absolute; inset: 0; z-index: 2; display: grid; place-items: center;
  background: var(--ink); transition: opacity 1.1s var(--ease); pointer-events: none;
}
.hero__sting video { width: min(60vw, 640px); height: auto; }
.hero__sting.gone { opacity: 0; }
.hero__inner { position: relative; z-index: 3; padding-inline: var(--gutter); }
.hero__eyebrow { margin-bottom: 1.6rem; opacity: 0; transform: translateY(10px); }
.hero__title { font-size: var(--step-4); font-weight: 700; line-height: 0.9; letter-spacing: -0.04em; }
.hero__title em { font-style: normal; color: var(--ember); }
.hero__sub { margin: 1.8rem auto 0; max-width: 42ch; color: var(--bone-dim); font-size: var(--step-1); font-weight: 400; opacity: 0; transform: translateY(14px); }
.hero__scroll {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); z-index: 3;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--muted);
  display: flex; flex-direction: column; align-items: center; gap: 0.7rem; opacity: 0; transition: opacity 1s 2s var(--ease);
}
.hero__scroll .bar { width: 1px; height: 42px; background: linear-gradient(var(--ember), transparent); animation: scrolldrop 2s infinite; }
@keyframes scrolldrop { 0% { transform: scaleY(0); transform-origin: top; } 45% { transform: scaleY(1); transform-origin: top; } 55% { transform: scaleY(1); transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ============================================================
   MARQUEE / PROOF STRIP
   ============================================================ */
.proof { border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); padding: 2.4rem 0; overflow: hidden; }
.proof__inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.stat { text-align: center; }
.stat__num { font-size: var(--step-2); font-weight: 700; letter-spacing: -0.03em; color: var(--bone); line-height: 1; }
.stat__num .u { color: var(--ember); }
.stat__label { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-top: 0.6rem; }

/* ============================================================
   SECTION HEADER
   ============================================================ */
.sec { padding: clamp(5rem, 12vh, 10rem) 0; }
.sec__head { display: flex; flex-direction: column; gap: 1.4rem; max-width: 60ch; margin-bottom: 4rem; }
.sec__title { font-size: var(--step-3); }
.sec__index { position: absolute; top: clamp(3rem,8vh,6rem); right: var(--gutter); font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.2em; color: var(--muted); }

/* ============================================================
   ELEMENTS (services as periodic tiles)
   ============================================================ */
.elements { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.el {
  position: relative; grid-column: span 3; aspect-ratio: 1 / 1.15; border: 1px solid var(--line);
  padding: 1.4rem; display: flex; flex-direction: column; justify-content: space-between;
  background: linear-gradient(160deg, var(--ink-2), var(--ink)); overflow: hidden;
  transition: border-color 0.5s var(--ease), transform 0.5s var(--ease);
}
.el__bg { position: absolute; inset: 0; z-index: 0; opacity: 0; transform: scale(1.1); transition: opacity 0.7s var(--ease), transform 0.9s var(--ease); }
.el__bg img { width: 100%; height: 100%; object-fit: cover; }
.el__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,8,7,0.4), rgba(10,8,7,0.88)); }
.el:hover { border-color: var(--oxblood-lite); transform: translateY(-6px); }
.el:hover .el__bg { opacity: 0.5; transform: scale(1); }
.el__top { position: relative; z-index: 1; display: flex; align-items: flex-start; justify-content: space-between; }
.el__sym { font-size: var(--step-2); font-weight: 700; letter-spacing: -0.04em; color: var(--ember); line-height: 1; }
.el__no { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.1em; }
.el__body { position: relative; z-index: 1; }
.el__name { font-size: var(--step-1); font-weight: 600; letter-spacing: -0.02em; }
.el__desc { font-family: var(--mono); font-size: 0.72rem; line-height: 1.5; color: var(--bone-dim); margin-top: 0.5rem; letter-spacing: 0.02em; }
.el--wide { grid-column: span 6; aspect-ratio: auto; }
.el--tall { grid-column: span 3; }
.el--human { grid-column: span 6; aspect-ratio: auto; border-color: var(--oxblood); background: linear-gradient(150deg, var(--oxblood) -40%, var(--ink-3) 60%); }
.el--human .el__sym, .el--human .el__no { color: var(--bone); }

/* ============================================================
   WORK
   ============================================================ */
.work__list { display: flex; flex-direction: column; }
.wk {
  display: grid; grid-template-columns: 0.5fr 2fr 1.3fr auto; align-items: center; gap: 2rem;
  padding: 2.2rem 0; border-top: 1px solid var(--line); position: relative; transition: padding 0.5s var(--ease);
}
.wk:last-child { border-bottom: 1px solid var(--line); }
.wk__no { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.wk__client { font-size: var(--step-2); font-weight: 600; letter-spacing: -0.03em; transition: color 0.4s, transform 0.5s var(--ease); }
.wk__logline { font-family: var(--mono); font-size: 0.8rem; color: var(--bone-dim); line-height: 1.55; }
.wk__metric { text-align: right; }
.wk__metric b { display: block; font-size: var(--step-1); font-weight: 700; color: var(--ember); letter-spacing: -0.02em; }
.wk__metric span { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.wk__glow { position: absolute; inset: 0; z-index: -1; opacity: 0; background: linear-gradient(90deg, rgba(103,12,13,0.28), transparent 70%); transition: opacity 0.5s var(--ease); }
.wk:hover { padding-left: 1.4rem; }
.wk:hover .wk__client { color: var(--bone); transform: translateX(4px); }
.wk:hover .wk__glow { opacity: 1; }

/* ============================================================
   HUMAN ELEMENT (story)
   ============================================================ */
.human { position: relative; overflow: hidden; }
.human__bg { position: absolute; inset: 0; z-index: 0; }
.human__bg img, .human__bg video { width: 100%; height: 100%; object-fit: cover; opacity: 0.32; }
.human__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--ink) 20%, transparent 90%); }
.human__inner { position: relative; z-index: 1; max-width: 58ch; }
.human__quote { font-size: var(--step-2); font-weight: 500; line-height: 1.22; letter-spacing: -0.02em; }
.human__quote em { color: var(--ember); font-style: normal; }
.human__by { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin-top: 2rem; letter-spacing: 0.1em; }

/* ============================================================
   AI / HUMAN split
   ============================================================ */
.thesis { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); }
.thesis__col { padding: clamp(2rem, 5vw, 4rem); }
.thesis__col:first-child { border-right: 1px solid var(--line); }
.thesis__k { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.2rem; }
.thesis__v { font-size: var(--step-1); font-weight: 500; letter-spacing: -0.01em; line-height: 1.25; }
.thesis__v b { color: var(--ember); font-weight: 600; }

/* ============================================================
   CTA
   ============================================================ */
.cta { text-align: center; padding: clamp(6rem, 16vh, 12rem) 0; position: relative; overflow: hidden; }
.cta__title { font-size: var(--step-3); font-weight: 700; letter-spacing: -0.035em; line-height: 0.98; }
.cta__title em { color: var(--ember); font-style: normal; }
.btn {
  display: inline-flex; align-items: center; gap: 0.8rem; margin-top: 2.6rem;
  font-family: var(--mono); font-size: var(--step--1); letter-spacing: 0.14em; text-transform: uppercase;
  background: var(--oxblood); color: var(--bone); padding: 1.1rem 2rem; border-radius: 100px;
  border: 1px solid var(--oxblood-lite); transition: background 0.4s var(--ease), transform 0.4s var(--ease), box-shadow 0.4s;
}
.btn:hover { background: var(--oxblood-2); transform: translateY(-3px); box-shadow: 0 18px 50px -12px rgba(103,12,13,0.7); }
.btn .arw { transition: transform 0.4s var(--ease); }
.btn:hover .arw { transform: translateX(5px); }
.btn--ghost { background: transparent; border-color: var(--line); }
.btn--ghost:hover { background: rgba(243,237,230,0.06); box-shadow: none; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--line); padding: clamp(3rem,7vh,5rem) 0 2.4rem; }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2rem; padding-bottom: 3rem; }
.footer__slogan { font-size: var(--step-2); font-weight: 500; letter-spacing: -0.02em; max-width: 16ch; }
.footer__slogan em { color: var(--ember); font-style: normal; }
.footer__col h4 { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.2rem; }
.footer__col a, .footer__col p { display: block; color: var(--bone-dim); font-size: 0.92rem; margin-bottom: 0.6rem; transition: color 0.3s; }
.footer__col a:hover { color: var(--ember); }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 2rem; border-top: 1px solid var(--line-2); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--muted); }
.footer__bottom img { height: 26px; opacity: 0.7; }

/* ============================================================
   PAGE HEADER (interior pages)
   ============================================================ */
.pagehead { padding: clamp(9rem, 22vh, 15rem) 0 clamp(3rem,8vh,6rem); border-bottom: 1px solid var(--line-2); position: relative; }
.pagehead h1 { font-size: var(--step-3); letter-spacing: -0.035em; }
.pagehead p { color: var(--bone-dim); max-width: 52ch; margin-top: 1.4rem; font-size: var(--step-1); font-weight: 400; }

/* ============================================================
   PRICING
   ============================================================ */
.ptable { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
.ptable th { text-align: left; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); padding: 0.9rem 1rem; border-bottom: 1px solid var(--line); font-weight: 400; }
.ptable td { padding: 1.1rem 1rem; border-bottom: 1px solid var(--line-2); font-size: 0.92rem; color: var(--bone-dim); vertical-align: top; }
.ptable td:first-child { color: var(--bone); font-weight: 500; }
.ptable td .price { color: var(--ember); font-family: var(--mono); font-weight: 500; white-space: nowrap; }
.ptable tr:hover td { background: rgba(243,237,230,0.02); }
.pcard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 1.5rem; }
.pcard { border: 1px solid var(--line); padding: 1.6rem; display: flex; flex-direction: column; gap: 0.5rem; transition: border-color 0.4s, transform 0.4s var(--ease); }
.pcard:hover { border-color: var(--oxblood-lite); transform: translateY(-4px); }
.pcard.feature { border-color: var(--oxblood); background: linear-gradient(160deg, rgba(103,12,13,0.22), transparent); }
.pcard h4 { font-size: var(--step-1); font-weight: 600; }
.pcard .amt { font-family: var(--mono); font-size: var(--step-1); color: var(--ember); }
.pcard .per { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }
.pcard ul { list-style: none; margin-top: 0.8rem; display: flex; flex-direction: column; gap: 0.5rem; }
.pcard li { font-size: 0.85rem; color: var(--bone-dim); padding-left: 1.2rem; position: relative; }
.pcard li::before { content: "+"; position: absolute; left: 0; color: var(--ember); }
.dept { margin-top: 4rem; }
.dept__title { font-size: var(--step-2); display: flex; align-items: baseline; gap: 1rem; }
.dept__title .no { font-family: var(--mono); font-size: 0.8rem; color: var(--ember); }

/* ============================================================
   TEAM (studio page)
   ============================================================ */
.team { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.member { border: 1px solid var(--line); padding: 1.8rem; transition: border-color 0.4s, transform 0.4s var(--ease); }
.member:hover { border-color: var(--oxblood-lite); transform: translateY(-4px); }
.member h4 { font-size: var(--step-1); font-weight: 600; }
.member .role { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ember); margin: 0.4rem 0 1rem; }
.member p { font-size: 0.86rem; color: var(--bone-dim); line-height: 1.55; }

/* ============================================================
   CONTACT
   ============================================================ */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; margin-top: 2.5rem; }
.form .full { grid-column: 1 / -1; }
.field label { display: block; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.6rem; }
.field input, .field textarea, .field select {
  width: 100%; background: var(--ink-2); border: 1px solid var(--line); color: var(--bone);
  padding: 0.9rem 1rem; font-family: var(--display); font-size: 0.95rem; transition: border-color 0.3s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--oxblood-lite); }
.field textarea { min-height: 140px; resize: vertical; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: flex; flex-direction: column; gap: 5px; padding: 8px; }
  .nav__burger span { width: 24px; height: 2px; background: var(--bone); transition: 0.3s; }
  .proof__inner { grid-template-columns: repeat(2, 1fr); gap: 2.5rem 1rem; }
  .el, .el--wide, .el--human { grid-column: span 6; aspect-ratio: 1/1; }
  .wk { grid-template-columns: auto 1fr; gap: 0.6rem 1.2rem; }
  .wk__logline { grid-column: 2; }
  .wk__metric { grid-column: 2; text-align: left; }
  .thesis { grid-template-columns: 1fr; }
  .thesis__col:first-child { border-right: none; border-bottom: 1px solid var(--line); }
  .footer__top { grid-template-columns: 1fr; gap: 2.5rem; }
  .team, .pcard-grid { grid-template-columns: 1fr 1fr; }
  .form { grid-template-columns: 1fr; }
  .mobile-menu { display: flex; }
  .sec__index { display: none; }
  .ptable { display: block; overflow-x: auto; white-space: nowrap; }
  .dept__title { font-size: var(--step-1); }
  .human__bg::after { background: linear-gradient(180deg, rgba(10,8,7,0.55), rgba(10,8,7,0.9)); }
  .pagehead { padding-top: clamp(7rem, 18vh, 11rem); }
}
@media (max-width: 560px) {
  .proof__inner { grid-template-columns: 1fr 1fr; }
  .el, .el--wide, .el--human { grid-column: span 12; }
  .team, .pcard-grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

/* mobile menu overlay */
.mobile-menu {
  position: fixed; inset: 0; z-index: 99; background: var(--ink-2); display: none;
  flex-direction: column; align-items: center; justify-content: center; gap: 1.5rem;
  opacity: 0; pointer-events: none; transition: opacity 0.4s var(--ease);
}
.mobile-menu.open { display: flex; opacity: 1; pointer-events: auto; }
.mobile-menu a { font-size: var(--step-2); font-weight: 600; }
.mobile-menu a .mono { font-size: 0.8rem; color: var(--ember); margin-right: 0.5rem; }

/* ============================================================
   PRICING CALCULATOR
   ============================================================ */
.calc__grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.calc__controls { display: flex; flex-direction: column; }
.calc__group { padding: 1.6rem 0; border-top: 1px solid var(--line-2); }
.calc__group:first-child { border-top: none; padding-top: 0; }
.calc__label { display: flex; align-items: center; gap: 0.7rem; font-size: var(--step-1); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 1.1rem; }
.calc__label .no { font-family: var(--mono); font-size: 0.7rem; color: var(--ember); border: 1px solid var(--oxblood); border-radius: 5px; padding: 0.25em 0.5em; letter-spacing: 0.05em; }
.calc__label .calc__hint { margin-left: auto; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); font-weight: 400; }
.calc__opts { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.calc__opt {
  display: flex; flex-direction: column; gap: 0.25rem; align-items: flex-start;
  border: 1px solid var(--line); background: var(--ink-2); padding: 0.7rem 1rem; border-radius: 12px;
  font-family: var(--display); font-size: 0.9rem; color: var(--bone-dim); min-width: 84px;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), transform 0.2s var(--ease);
}
.calc__opt b { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); font-weight: 500; transition: color 0.3s; }
.calc__opt:hover { border-color: var(--oxblood-lite); transform: translateY(-2px); }
.calc__opt.is-active { background: var(--oxblood); border-color: var(--oxblood-lite); color: var(--bone); box-shadow: 0 10px 30px -14px rgba(103,12,13,0.9); }
.calc__opt.is-active b { color: var(--bone); }

/* summary */
.calc__summary { position: sticky; top: 90px; }
.calc__card { border: 1px solid var(--line); border-radius: 18px; padding: 1.8rem; background: linear-gradient(165deg, var(--ink-3), var(--ink)); overflow: hidden; position: relative; }
.calc__card::before { content: ""; position: absolute; top: -40%; right: -30%; width: 70%; height: 70%; background: radial-gradient(circle, rgba(103,12,13,0.35), transparent 70%); pointer-events: none; }
.calc__sum-row { display: flex; justify-content: space-between; align-items: baseline; position: relative; }
.calc__sum-row + .calc__sum-row { margin-top: 1.1rem; }
.calc__sum-row span { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bone-dim); }
.calc__sum-row b { font-size: var(--step-2); font-weight: 700; letter-spacing: -0.03em; color: var(--bone); font-variant-numeric: tabular-nums; }
.calc__sum-row.one b { font-size: var(--step-1); color: var(--bone-dim); }
.calc__sum-row b .u { color: var(--ember); font-size: 0.6em; }
.calc__discount { font-family: var(--mono); font-size: 0.72rem; color: var(--ember); margin-top: 0.5rem; min-height: 1em; opacity: 0; transition: opacity 0.4s; }
.calc__discount.show { opacity: 1; }
.calc__divider { height: 1px; background: var(--line); margin: 1.5rem 0; }
.calc__lines { list-style: none; display: flex; flex-direction: column; gap: 0.55rem; min-height: 1rem; margin-bottom: 1.6rem; }
.calc__lines li { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--mono); font-size: 0.76rem; color: var(--bone-dim); animation: lineIn 0.4s var(--ease); }
.calc__lines li .lp { color: var(--muted); white-space: nowrap; }
.calc__lines .empty { color: var(--muted); }
@keyframes lineIn { from { opacity: 0; transform: translateX(-6px); } to { opacity: 1; transform: none; } }
.calc__cta { width: 100%; justify-content: center; margin-top: 0; }
.calc__note { margin-top: 1rem; font-size: 0.68rem; color: var(--muted); line-height: 1.5; letter-spacing: 0.02em; }

@media (max-width: 900px) {
  .calc__grid { grid-template-columns: 1fr; }
  .calc__summary { position: static; margin-top: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .line-mask > span { opacity: 1 !important; transform: none !important; }
  .hero__sting { display: none; }
}