/* =========================================================================
   Sandra Wissa — Portfolio site
   Shared design system. Mirrors HackerRank duotone + Puzzle magenta accent.
   ========================================================================= */

:root {
  /* Foundation — duotone */
  --black: #000000;
  --ink: #0B0F0D;
  --ink-2: #131815;
  --ink-3: #1B221E;
  --white: #FFFFFF;
  --paper: #F5F8F6;

  /* Accent — mint green */
  --green: #2FE8A0;
  --green-bright: #5FF2BC;
  --green-deep: #1FB877;
  --green-ink: #0E7A4B;
  --green-tint: rgba(47, 232, 160, 0.12);
  --green-glow: rgba(47, 232, 160, 0.30);

  /* Secondary accent — magenta (rare second note) */
  --magenta: #FF81FF;
  --magenta-deep: #B83FBF;
  --magenta-ink: #8E2C97;
  --magenta-tint: rgba(255, 129, 255, 0.12);
  --magenta-glow: rgba(255, 129, 255, 0.28);
  --grad-accent: linear-gradient(100deg, var(--green) 0%, var(--magenta) 100%);

  /* Hairlines */
  --border-dark: rgba(220, 255, 240, 0.10);
  --border-light: rgba(10, 20, 16, 0.10);
  --border-green: rgba(47, 232, 160, 0.45);

  /* Text on black */
  --on-black: #F4F8F6;
  --on-black-muted: #9AA7A0;
  --on-black-faint: #5B635E;
  --ghost: #44504A;

  /* Text on white */
  --on-white: #0B0F0D;
  --on-white-muted: #586660;
  --on-white-faint: #93A099;
  --ghost-light: #C4CEC9;

  --on-green: #04140C;
  --neg: #FF6B5E;

  /* Spacing */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;
  --space-9: 96px; --space-10: 128px;

  --container: 1200px;
  --container-narrow: 760px;
  --gutter: clamp(20px, 5vw, 64px);
  --section-y: clamp(72px, 10vw, 144px);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
  --glow-btn: 0 8px 40px -6px var(--green-glow);
  --glow-card: 0 0 80px -20px var(--green-glow);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;

  --font-sans: "Geist", "Geist Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--black);
  color: var(--on-black);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01";
  overflow-x: hidden;
}
img, svg, image-slot { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--green); color: var(--on-green); }

/* =========================================================================
   Layout primitives
   ========================================================================= */
.section { padding: var(--section-y) 0; position: relative; overflow: hidden; }
.section--black { background: var(--black); color: var(--on-black); }
.section--white { background: var(--white); color: var(--on-white); }
.section--ink { background: var(--ink); color: var(--on-black); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.container--narrow { max-width: var(--container-narrow); }

.center { text-align: center; }
.stack > * + * { margin-top: var(--space-5); }

/* Section header block */
.sec-head { max-width: 760px; margin: 0 auto; text-align: center; }
.sec-head .lede { margin-top: var(--space-5); }
.sec-head--left { margin: 0; text-align: left; }

/* =========================================================================
   Typography
   ========================================================================= */
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: 13px; font-weight: 600; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--green);
  margin-bottom: var(--space-5);
}
.section--white .eyebrow { color: var(--green-ink); }
.eyebrow::before { content: "✦"; font-size: 11px; color: var(--green); }
.section--white .eyebrow::before { color: var(--green-deep); }

h1, h2, h3 { font-weight: 600; line-height: 1.1; letter-spacing: -0.02em; }

.hero-type { font-size: clamp(48px, 8vw, 96px); line-height: 0.98; letter-spacing: -0.035em; font-weight: 600; }
.h1 { font-size: clamp(40px, 5vw, 64px); line-height: 1.02; letter-spacing: -0.03em; }
.h2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.08; letter-spacing: -0.02em; }
.h3 { font-size: 26px; line-height: 1.18; letter-spacing: -0.01em; }

.lede { font-size: clamp(17px, 1.5vw, 20px); font-weight: 400; line-height: 1.5; color: var(--on-black-muted); }
.section--white .lede { color: var(--on-white-muted); }

.small { font-size: 14px; font-weight: 500; line-height: 1.45; }
.muted { color: var(--on-black-muted); }
.section--white .muted { color: var(--on-white-muted); }
.faint { color: var(--on-black-faint); }
.section--white .faint { color: var(--on-white-faint); }

/* The signature statement treatment */
.statement { font-weight: 600; }
.statement .ghost {
  color: var(--ghost);
  background: linear-gradient(180deg, #5A655F 0%, var(--ghost) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section--white .statement .ghost {
  background: linear-gradient(180deg, #D6DED9 0%, var(--ghost-light) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.statement .emph { color: var(--on-black); -webkit-text-fill-color: var(--on-black); }
.section--white .statement .emph { color: var(--on-white); -webkit-text-fill-color: var(--on-white); }
.statement .hl { color: var(--green); -webkit-text-fill-color: var(--green); }
.section--white .statement .hl { color: var(--green-deep); -webkit-text-fill-color: var(--green-deep); }

.glyph {
  display: inline-block; vertical-align: -0.08em;
  width: 0.92em; height: 0.92em; margin: 0 0.12em;
  color: var(--green);
  filter: drop-shadow(0 0 14px var(--green-glow));
}
.glyph--bloom { filter: drop-shadow(0 0 10px var(--green-glow)) drop-shadow(0 0 22px var(--magenta-glow)); }

/* =========================================================================
   Buttons
   ========================================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: 15px 26px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; letter-spacing: -0.01em;
  border: 1px solid transparent; min-height: 48px;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn .arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .arrow { transform: translate(3px, -3px); }

.btn--green { background: var(--green); color: var(--on-green); }
.btn--green:hover { background: var(--green-bright); transform: translateY(-2px); box-shadow: var(--glow-btn); }

.btn--spotlight { background: var(--black); color: var(--on-black); border-color: var(--border-dark); box-shadow: var(--glow-btn); }
.btn--spotlight:hover { border-color: var(--border-green); box-shadow: 0 10px 56px -6px var(--green-glow); transform: translateY(-2px); }

.btn--dark { background: var(--ink-2); color: var(--on-black); border-color: var(--border-dark); }
.btn--dark:hover { background: var(--ink-3); border-color: var(--border-green); transform: translateY(-2px); }

.btn--ghost-light { background: transparent; color: var(--on-white); border-color: var(--border-light); }
.btn--ghost-light:hover { border-color: var(--border-green); background: var(--green-tint); }

.btn--quiet { background: transparent; padding: 8px 0; color: var(--on-black-muted); min-height: auto; }
.btn--quiet:hover { color: var(--green); }
.section--white .btn--quiet { color: var(--on-white-muted); }
.section--white .btn--quiet:hover { color: var(--green-ink); }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.btn-row--center { justify-content: center; }

/* =========================================================================
   Nav
   ========================================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 72px; display: flex; align-items: center;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(0, 0, 0, 0.88); backdrop-filter: blur(12px);
  border-bottom-color: var(--border-dark);
}
.nav__inner { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
.brand { font-size: 17px; font-weight: 600; letter-spacing: -0.02em; color: var(--on-black);
  display: inline-flex; align-items: center; gap: var(--space-2); }
.brand .spark { color: var(--green); }
.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__links a { font-size: 15px; font-weight: 500; color: var(--on-black-muted);
  transition: color var(--dur) var(--ease); position: relative; padding: 4px 0; }
.nav__links a:hover { color: var(--on-black); }
.nav__links a.is-active { color: var(--green); }
.nav__links a.is-active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--green); border-radius: 2px; }
.nav__cta { display: flex; align-items: center; gap: var(--space-3); }
.nav__burger { display: none; background: none; border: none; color: var(--on-black); width: 44px; height: 44px; align-items: center; justify-content: center; }
.nav__burger svg { width: 24px; height: 24px; }

/* Mobile sheet */
.sheet {
  position: fixed; inset: 0; z-index: 200; background: var(--black);
  display: flex; flex-direction: column; padding: var(--space-6) var(--gutter);
  transform: translateY(-100%); transition: transform var(--dur) var(--ease);
}
.sheet.is-open { transform: translateY(0); }
.sheet__top { display: flex; align-items: center; justify-content: space-between; height: 40px; margin-bottom: var(--space-8); }
.sheet__links { display: flex; flex-direction: column; gap: var(--space-5); margin-top: var(--space-6); }
.sheet__links a { font-size: 32px; font-weight: 600; letter-spacing: -0.02em; color: var(--on-black); }
.sheet__links a.is-active { color: var(--green); }
.sheet__close { background: none; border: none; color: var(--on-black); width: 44px; height: 44px; }

/* =========================================================================
   Hero
   ========================================================================= */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center;
  padding-top: 120px; padding-bottom: var(--space-9); background: var(--black); overflow: hidden; }
.hero__glow {
  position: absolute; left: 50%; top: 58%; transform: translate(-50%, -50%);
  width: min(1100px, 120vw); height: min(700px, 80vh); pointer-events: none; z-index: 0;
  background:
    radial-gradient(closest-side, var(--green-glow), transparent 70%) ,
    radial-gradient(closest-side at 70% 60%, var(--magenta-glow), transparent 72%);
  filter: blur(20px); opacity: 0.85;
}
.hero__grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 72%);
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 72%);
}
.hero__inner { position: relative; z-index: 1; text-align: center; margin: 0 auto; max-width: 900px; }
.hero .lede { max-width: 620px; margin-left: auto; margin-right: auto; margin-top: var(--space-6); }
.hero .btn-row { margin-top: var(--space-7); }

/* Split hero with portrait */
.hero__split { position: relative; z-index: 1; display: grid; grid-template-columns: 1.12fr 0.88fr; gap: clamp(32px, 5vw, 80px); align-items: center; }
.hero__text { text-align: left; }
.hero__split .hero-type { font-size: clamp(38px, 5.2vw, 78px); }
.hero__split .lede { max-width: 540px; margin-left: 0; margin-right: 0; }
.hero__split .btn-row { justify-content: flex-start; }
.hero__portrait { position: relative; }
.hero__portrait image-slot { width: 100%; aspect-ratio: 4/5; border: 1px solid var(--border-dark); border-radius: var(--radius-lg); box-shadow: var(--glow-card); }

/* =========================================================================
   Proof strip / stat blocks
   ========================================================================= */
.proof { border-top: 1px solid var(--border-dark); border-bottom: 1px solid var(--border-dark); background: var(--black); }
.proof__inner { padding: var(--space-8) 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.proof__note { text-align: center; color: var(--on-black-muted); margin-bottom: var(--space-7); }
.proof__note b { color: var(--on-black); font-weight: 600; }

.stat { }
.stat__label { font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-black-faint); margin-bottom: var(--space-3); }
.section--white .stat__label { color: var(--on-white-faint); }
.stat__row { display: flex; align-items: baseline; gap: var(--space-3); flex-wrap: wrap; }
.stat__before { font-size: 18px; color: var(--on-black-faint); font-variant-numeric: tabular-nums; }
.section--white .stat__before { color: var(--on-white-faint); }
.stat__arrow { color: var(--green); }
.stat__after { font-size: clamp(34px, 4vw, 56px); font-weight: 600; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.stat__delta { display: inline-flex; align-items: center; gap: 4px; margin-top: var(--space-3);
  font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: var(--radius-pill);
  background: var(--green-tint); color: var(--green); font-variant-numeric: tabular-nums; }
.section--white .stat__delta { color: var(--green-ink); }
.stat__delta--neg { background: rgba(255,107,94,0.12); color: var(--neg); }

/* Filled reduction stat */
.stat--reduction .stat__big { display: flex; align-items: baseline; gap: 6px; font-size: clamp(36px, 4vw, 56px); font-weight: 600; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; margin-top: var(--space-2); }
.stat--reduction .stat__big-unit { font-size: 0.42em; color: var(--green); }
.section--white .stat--reduction .stat__big-unit { color: var(--green-deep); }
.stat--reduction .stat__sub { font-size: 13px; color: var(--on-black-faint); margin-top: var(--space-3); }
.section--white .stat--reduction .stat__sub { color: var(--on-white-faint); }
.mini-metrics .stat--reduction .stat__big { font-size: 28px; }
.mini-metrics .stat--reduction .stat__sub { font-size: 11.5px; margin-top: var(--space-1); }

/* Brand strip */
.brandstrip { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: var(--space-3) var(--space-5); margin-top: var(--space-7); }
.brandstrip__name { font-size: 16px; font-weight: 600; color: var(--on-black-muted); letter-spacing: -0.01em; }
.section--white .brandstrip__name { color: var(--on-white-muted); }
.brandstrip__dot { color: var(--green); font-size: 12px; }

/* Baked portrait frame (About) */
.portrait-frame { width: 100%; max-width: 420px; aspect-ratio: 4/5; border: 1px solid var(--border-dark); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--glow-card); background: var(--ink-2); position: relative; }
.portrait-frame::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 80px -30px var(--green-glow); pointer-events: none; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 22%; display: block; }

/* Human-in-the-loop diagram */
.loop { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: var(--space-3); margin-top: var(--space-8); }
.loop__node { padding: var(--space-6); border: 1px solid var(--border-dark); border-radius: var(--radius-lg); background: var(--ink); display: flex; flex-direction: column; gap: var(--space-2); }
.section--white .loop__node { background: var(--paper); border-color: var(--border-light); }
.loop__node--gate { border-color: var(--border-green); box-shadow: var(--glow-card); background: var(--ink-2); }
.section--white .loop__node--gate { background: var(--white); }
.loop__k { font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-black-faint); }
.section--white .loop__k { color: var(--on-white-faint); }
.loop__node--gate .loop__k { color: var(--green); }
.section--white .loop__node--gate .loop__k { color: var(--green-ink); }
.loop__t { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; color: var(--on-black); }
.section--white .loop__t { color: var(--on-white); }
.loop__d { font-size: 14px; color: var(--on-black-muted); line-height: 1.45; }
.section--white .loop__d { color: var(--on-white-muted); }
.loop__arrow { display: flex; align-items: center; justify-content: center; color: var(--green); font-size: 22px; }
.loop__cap { text-align: center; max-width: 760px; margin: var(--space-6) auto 0; }

/* Adapt cards */
.mcard { border-radius: var(--radius-lg); background: var(--ink); border: 1px solid var(--border-dark); padding: var(--space-6); transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.section--white .mcard { background: var(--paper); border-color: var(--border-light); }
.mcard:hover { transform: translateY(-3px); border-color: var(--border-green); box-shadow: var(--glow-card); }
.mcard__k { font-size: 13px; font-weight: 600; letter-spacing: 0.1em; color: var(--green); text-transform: uppercase; }
.section--white .mcard__k { color: var(--green-ink); }
.mcard__k--m { color: var(--magenta); }
.mcard p { margin-top: var(--space-3); color: var(--on-black-muted); }
.section--white .mcard p { color: var(--on-white-muted); }

/* PENDING placeholder slot */
.stat--pending .stat__pending {
  display: flex; align-items: center; justify-content: center;
  height: 64px; border: 1px dashed var(--border-green); border-radius: var(--radius-sm);
  color: var(--on-black-faint); font-size: 14px; letter-spacing: 0.02em;
  background: var(--green-tint); margin-top: var(--space-2);
}
.section--white .stat--pending .stat__pending { color: var(--on-white-faint); }

/* In-card mini metric slots (Home case previews) */
.mini-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin: var(--space-5) 0; }
.mini-metrics .stat__label { color: var(--on-black-faint); }
.mini-metrics .stat__pending { height: 46px; font-size: 12.5px; margin-top: var(--space-2); }
/* fcard is a dark card; keep its metric text light even when it sits on a light (section--white) section */
.section--white .fcard .stat__label,
.section--white .fcard .stat--reduction .stat__sub,
.section--white .fcard .stat--pending .stat__pending { color: var(--on-black-faint); }
.section--white .fcard .stat--reduction .stat__big-unit { color: var(--green); }

/* =========================================================================
   Cards
   ========================================================================= */
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-top: var(--space-8); }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); margin-top: var(--space-8); }

/* Feature card (dark card on white section) */
.fcard {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  background: var(--ink); border: 1px solid var(--border-dark); color: var(--on-black);
  padding: var(--space-7); min-height: 420px; display: flex; flex-direction: column;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.fcard::before {
  content: ""; position: absolute; top: -30%; right: -20%; width: 70%; height: 80%;
  background: radial-gradient(closest-side, var(--green-glow), transparent 70%);
  pointer-events: none; opacity: 0.8;
}
.fcard--magenta::before { background: radial-gradient(closest-side, var(--magenta-glow), transparent 70%); }
.fcard:hover { transform: translateY(-3px); border-color: var(--border-green); box-shadow: var(--glow-card); }
.fcard__body { position: relative; z-index: 1; max-width: 78%; }
.fcard h3 { color: var(--on-black); margin-bottom: var(--space-3); }
.fcard .fcard__lead { color: var(--on-black-muted); margin-bottom: var(--space-5); }
.fcard .btn { margin-top: auto; align-self: flex-start; position: relative; z-index: 1; }
.fcard__media {
  position: absolute; right: 0; top: 18%; bottom: 8%; width: 42%; z-index: 0;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  border: 1px solid var(--border-dark); border-right: none;
  background: var(--ink-2);
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: var(--on-black-faint); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; padding: var(--space-4);
  overflow: hidden;
}

/* + bullet list */
.plus-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); margin: var(--space-5) 0; }
.plus-list li { display: flex; gap: var(--space-3); align-items: flex-start; color: var(--on-black-muted); }
.plus-list li::before { content: "+"; color: var(--green); font-weight: 700; line-height: 1.5; flex: none; }
.section--white .plus-list li { color: var(--on-white-muted); }

/* Case card (preview, on black) */
.ccard {
  position: relative; border-radius: var(--radius-lg); background: var(--ink); border: 1px solid var(--border-dark);
  padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  overflow: hidden;
}
.ccard:hover { transform: translateY(-3px); border-color: var(--border-green); box-shadow: var(--glow-card); }
.ccard__num { font-size: 13px; font-weight: 600; letter-spacing: 0.12em; color: var(--green); }
.ccard__num--m { color: var(--magenta); }
.ccard h3 { color: var(--on-black); }
.ccard__chips { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-2); }
.chip { font-size: 12px; font-weight: 500; padding: 5px 11px; border-radius: var(--radius-pill);
  background: var(--ink-2); border: 1px solid var(--border-dark); color: var(--on-black-muted); }
.ccard__foot { margin-top: auto; padding-top: var(--space-4); }

/* =========================================================================
   Comparison columns (the Shift)
   ========================================================================= */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin-top: var(--space-8); align-items: stretch; }
.compare__col { border-radius: var(--radius-lg); padding: var(--space-7); border: 1px solid var(--border-dark); }
.compare__col--old { background: var(--ink); color: var(--on-black-muted); }
.compare__col--new { background: var(--ink-2); border-color: var(--border-green); box-shadow: var(--glow-card); transform: translateY(-8px); }
.compare__title { font-size: 14px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: var(--space-5); }
.compare__col--old .compare__title { color: var(--on-black-faint); }
.compare__col--new .compare__title { color: var(--green); }
.compare__list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: var(--space-4); }
.compare__list li { display: flex; gap: var(--space-3); align-items: flex-start; }
.compare__col--old li::before { content: "✕"; color: var(--neg); font-weight: 700; flex: none; }
.compare__col--new li { color: var(--on-black); }
.compare__col--new li::before { content: "+"; color: var(--green); font-weight: 700; flex: none; }
.sowhat { margin-top: var(--space-8); text-align: center; max-width: 820px; margin-left: auto; margin-right: auto; }

/* =========================================================================
   Pipeline (method)
   ========================================================================= */
.pipeline { margin-top: var(--space-9); }
.pipeline__track { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: var(--space-4); position: relative; }
.pnode { position: relative; padding-top: var(--space-7); }
.pnode__line { position: absolute; top: 23px; left: 0; right: 0; height: 2px; background: var(--border-dark); border-radius: 2px; overflow: hidden; }
.pnode__line::after { content: ""; position: absolute; inset: 0; width: var(--fill, 100%); background: var(--grad-accent); transition: width 900ms var(--ease); }
.pnode__num { position: relative; z-index: 1; width: 46px; height: 46px; border-radius: 50%;
  border: 2px solid var(--border-green); background: var(--ink); color: var(--on-black);
  display: flex; align-items: center; justify-content: center; font-weight: 600; font-variant-numeric: tabular-nums;
  font-size: 16px; margin-bottom: var(--space-4); }
.section--white .pnode__num { background: var(--white); color: var(--on-white); }
.pnode h3 { font-size: 19px; margin-bottom: var(--space-2); }
.section--white .pnode h3 { color: var(--on-white); }
.pnode__gate { font-size: 14px; color: var(--on-black-muted); line-height: 1.45; }
.section--white .pnode__gate { color: var(--on-white-muted); }

/* condensed */
.pipeline--condensed .pnode { padding-top: var(--space-6); }
.pipeline--condensed .pnode__gate { display: none; }

/* principles bar */
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); margin-top: var(--space-8); }
.principle { display: flex; gap: var(--space-3); align-items: flex-start; }
.principle::before { content: "+"; color: var(--green); font-weight: 700; font-size: 20px; line-height: 1.2; flex: none; }
.principle span { font-size: 16px; color: var(--on-black); font-weight: 500; }

/* meta-method steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-8); }
.step { border-top: 1px solid var(--border-dark); padding-top: var(--space-4); }
.step__n { font-size: 13px; font-weight: 600; color: var(--green); font-variant-numeric: tabular-nums; letter-spacing: 0.1em; }
.step h3 { font-size: 20px; margin: var(--space-3) 0 var(--space-2); color: var(--on-black); }
.step p { color: var(--on-black-muted); font-size: 15px; }

/* =========================================================================
   Article cards
   ========================================================================= */
.articles { display: flex; flex-direction: column; gap: 0; margin-top: var(--space-8); border-top: 1px solid var(--border-dark); }
.acard { display: grid; grid-template-columns: auto 1fr auto auto; gap: var(--space-5); align-items: center;
  padding: var(--space-6) var(--space-2); border-bottom: 1px solid var(--border-dark);
  transition: background var(--dur) var(--ease); }
.acard:hover { background: var(--ink); }
.section--white .acard:hover { background: var(--paper); }
.acard__part { font-size: 13px; font-weight: 600; letter-spacing: 0.1em; color: var(--green); white-space: nowrap; }
.section--white .acard__part { color: var(--green-ink); }
.acard__main h3 { font-size: 22px; }
.acard__geo { font-size: 13px; color: var(--on-black-faint); margin-top: 4px; }
.section--white .acard__geo { color: var(--on-white-faint); }
.acard__status { font-size: 12px; font-weight: 600; padding: 5px 11px; border-radius: var(--radius-pill);
  background: var(--ink-2); border: 1px solid var(--border-dark); color: var(--on-black-faint); white-space: nowrap; }
.section--white .acard__status { background: var(--paper); border-color: var(--border-light); color: var(--on-white-faint); }
.acard__arrow { color: var(--on-black-faint); transition: transform var(--dur) var(--ease), color var(--dur) var(--ease); }
.acard:hover .acard__arrow { color: var(--green); transform: translate(3px, -3px); }

/* =========================================================================
   CTA band + footer
   ========================================================================= */
.cta { position: relative; text-align: center; background: var(--black); overflow: hidden; }
.cta__glow { position: absolute; left: 50%; top: 0; transform: translate(-50%, -40%);
  width: 900px; height: 500px; pointer-events: none;
  background: radial-gradient(closest-side, var(--green-glow), transparent 70%),
              radial-gradient(closest-side at 65% 50%, var(--magenta-glow), transparent 72%);
  filter: blur(20px); opacity: 0.8; }
.cta__inner { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.cta .lede { margin: var(--space-6) auto var(--space-7); max-width: 620px; }

.footer { background: var(--black); border-top: 1px solid var(--border-dark); padding: var(--space-8) 0 var(--space-7); color: var(--on-black-faint); }
.footer__inner { display: flex; justify-content: space-between; gap: var(--space-7); flex-wrap: wrap; }
.footer__brand .brand { color: var(--on-black); margin-bottom: var(--space-4); }
.footer__fine { font-size: 13px; line-height: 1.7; max-width: 420px; }
.footer__nav { display: flex; gap: var(--space-8); flex-wrap: wrap; }
.footer__col h4, .footer__col .footer__col-title { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-black-faint); margin-bottom: var(--space-4); font-weight: 600; }
.footer__col a { display: block; font-size: 15px; color: var(--on-black-muted); padding: 5px 0; transition: color var(--dur) var(--ease); }
.footer__col a:hover { color: var(--green); }
.footer__sign { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--border-dark); font-size: 13px; display: flex; align-items: center; gap: var(--space-2); }
.footer__sign .spark { color: var(--green); }

/* =========================================================================
   Case study detail
   ========================================================================= */
.case { padding: var(--section-y) 0; }
.case__head { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-7); align-items: start; }
.case__head .h2 { margin-bottom: var(--space-4); }
.case__metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); margin-top: var(--space-8); }
.confnote { font-size: 13px; color: var(--on-black-faint); margin-top: var(--space-4); display: inline-flex; align-items: center; gap: var(--space-2); }
.section--white .confnote { color: var(--on-white-faint); }

/* =========================================================================
   Contact form
   ========================================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); margin-top: var(--space-8); align-items: start; }
.contact-actions { display: flex; flex-direction: column; gap: var(--space-4); }
.contact-link { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-5); border: 1px solid var(--border-dark); border-radius: var(--radius-md);
  background: var(--ink); transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease); }
.contact-link:hover { border-color: var(--border-green); transform: translateY(-2px); }
.contact-link__label { font-size: 13px; color: var(--on-black-faint); }
.contact-link__value { font-size: 17px; color: var(--on-black); font-weight: 500; }

.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.field label { font-size: 13px; font-weight: 600; letter-spacing: 0.04em; color: var(--on-black-muted); }
.field input, .field textarea {
  font-family: inherit; font-size: 16px; color: var(--on-black);
  background: var(--ink-2); border: 1px solid var(--border-dark); border-radius: var(--radius-sm);
  padding: 14px 16px; transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--border-green); box-shadow: 0 0 0 3px var(--green-tint); }
.field textarea { resize: vertical; min-height: 120px; }
.field.is-error input, .field.is-error textarea { border-color: var(--neg); }
.field__error { font-size: 13px; color: var(--neg); display: none; }
.field.is-error .field__error { display: block; }
.form__success { display: none; padding: var(--space-5); border-radius: var(--radius-md); background: var(--green-tint); border: 1px solid var(--border-green); color: var(--on-black); }
.form__success.is-shown { display: block; }

/* =========================================================================
   Reveal — content is always visible; .is-in is a no-op kept for markup parity.
   (Entrance animations are intentionally omitted: the preview freezes
    animation timelines, which would otherwise strand content at opacity 0.)
   ========================================================================= */
.reveal { opacity: 1; }

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 1023px) {
  .proof__inner { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .principles { grid-template-columns: repeat(2, 1fr); }
  .case__metrics { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .nav__links, .nav__cta .btn { display: none; }
  .nav__burger { display: flex; }
  .cards-2, .cards-3, .compare, .case__head, .contact-grid { grid-template-columns: 1fr; }
  .hero__split { grid-template-columns: 1fr; gap: var(--space-7); }
  .hero__portrait { max-width: 360px; }
  .compare__col--new { transform: none; }
  .pipeline__track { grid-auto-flow: row; grid-auto-columns: auto; gap: var(--space-6); }
  .loop { grid-template-columns: 1fr; }
  .loop__arrow { transform: rotate(90deg); padding: var(--space-2) 0; }
  .pnode { padding-top: 0; padding-left: var(--space-7); }
  .pnode__line { top: 0; bottom: 0; left: 22px; right: auto; width: 2px; height: auto; }
  .pnode__line::after { width: 100%; height: var(--fill, 0%); }
  .fcard { min-height: auto; }
  .fcard__body { max-width: 100%; }
  .fcard__media { position: relative; right: auto; top: auto; bottom: auto; width: 100%; height: 160px;
    border-radius: var(--radius-md); border-right: 1px solid var(--border-dark); margin-top: var(--space-6); }
  .acard { grid-template-columns: 1fr auto; grid-template-areas: "part status" "main arrow"; row-gap: var(--space-3); }
  .acard__part { grid-area: part; } .acard__status { grid-area: status; justify-self: end; }
  .acard__main { grid-area: main; } .acard__arrow { grid-area: arrow; align-self: center; }
}
@media (max-width: 560px) {
  .proof__inner, .case__metrics { grid-template-columns: 1fr; }
  .steps, .principles { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; }
}