/* ==========================================================================
   XPERTY — Design System
   Property management software for UK landlords & letting agencies
   --------------------------------------------------------------------------
   1.  Tokens
   2.  Reset & base
   3.  Layout primitives
   4.  Typography
   5.  Buttons & links
   6.  Header / navigation
   7.  Hero
   8.  Sections & components
   9.  Product UI mockups
   10. Forms
   11. Footer
   12. Motion & reveal
   13. Responsive
   ========================================================================== */

/* ------------------------------------------------------------- 0. Webfonts
   Self-hosted so the site renders identically offline, behind a firewall,
   or on a corporate network that blocks Google Fonts. ~164 KB total.        */
@font-face {
  font-family: "Instrument Serif"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/instrument-serif-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Instrument Serif"; font-style: italic; font-weight: 400; font-display: swap;
  src: url("../fonts/instrument-serif-latin-400-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 300; font-display: swap;
  src: url("../fonts/inter-latin-300-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/inter-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("../fonts/inter-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("../fonts/inter-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
}

/* ---------------------------------------------------------------- 1. Tokens */
:root {
  /* Core palette */
  --ink:        #0C0D0E;
  --ink-800:    #17191B;
  --ink-700:    #24272A;
  --ink-500:    #4A4E52;
  --ink-400:    #6E7276;
  --ink-300:    #9A9EA2;

  --paper:      #FBFAF7;
  --paper-warm: #F4F1EA;
  --stone-200:  #E9E4DA;
  --stone-300:  #D9D2C5;
  --stone-400:  #BDB4A3;

  /* Brand accents */
  --forest:     #1B3A31;
  --forest-600: #24493E;
  --forest-300: #6F8F83;
  --brass:      #B4986A;
  --brass-200:  #E4D8BF;

  --white:      #FFFFFF;

  /* Semantic */
  --bg:            var(--paper);
  --fg:            var(--ink);
  --fg-muted:      #6B6862;
  --rule:          rgba(12,13,14,.12);
  --rule-soft:     rgba(12,13,14,.07);
  --rule-invert:   rgba(255,255,255,.16);

  /* Type */
  --font-display: "Instrument Serif", "Times New Roman", Times, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Scale */
  --step--2: clamp(.6875rem, .67rem + .08vw, .75rem);
  --step--1: clamp(.8125rem, .79rem + .12vw, .875rem);
  --step-0:  clamp(.9375rem, .91rem + .14vw, 1.0625rem);
  --step-1:  clamp(1.125rem, 1.07rem + .28vw, 1.375rem);
  --step-2:  clamp(1.4rem, 1.28rem + .6vw, 1.9rem);
  --step-3:  clamp(1.85rem, 1.6rem + 1.2vw, 2.85rem);
  --step-4:  clamp(2.4rem, 1.9rem + 2.4vw, 4.2rem);
  --step-5:  clamp(3rem, 2rem + 4.6vw, 6.6rem);

  /* Space */
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(5rem, 9vw, 9.5rem);
  --maxw: 1320px;
  --maxw-narrow: 880px;

  /* Motion */
  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

/* ------------------------------------------------------- 2. Reset & base */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1, "cv11" 1;
  overflow-x: hidden;
}

img, svg, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--forest); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--ink); color: var(--paper); padding: .75rem 1.25rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* -------------------------------------------------- 3. Layout primitives */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: var(--maxw-narrow); }
.wrap--wide { max-width: 1560px; }

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(3.5rem, 6vw, 6rem); }
.section--flush-top { padding-top: 0; }

.section--dark {
  background: var(--ink);
  color: var(--paper);
  --rule: var(--rule-invert);
  --fg-muted: rgba(251,250,247,.62);
}
.section--forest {
  background: var(--forest);
  color: var(--paper);
  --rule: rgba(255,255,255,.18);
  --fg-muted: rgba(251,250,247,.7);
}
.section--warm { background: var(--paper-warm); }

.grid { display: grid; gap: clamp(1.5rem, 3vw, 3rem); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: center;
}
.split--lead { grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); align-items: start; }
.split--top { align-items: start; }

.stack > * + * { margin-top: 1.25rem; }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }

hr.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* ------------------------------------------------------- 4. Typography */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: .96;
  letter-spacing: -.015em;
  text-wrap: balance;
}
.d1 { font-size: var(--step-5); }
.d2 { font-size: var(--step-4); }
.d3 { font-size: var(--step-3); }

h1,h2,h3,h4,h5 { font-weight: 500; letter-spacing: -.02em; line-height: 1.14; text-wrap: balance; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); }
h4 { font-size: var(--step-0); }

.eyebrow {
  font-size: var(--step--2);
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--fg-muted);
  display: inline-flex;
  align-items: center;
  gap: .75rem;
}
.eyebrow::before {
  content: "";
  width: 2rem; height: 1px;
  background: currentColor;
  opacity: .45;
}
.eyebrow--bare::before { display: none; }

.lead {
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--fg-muted);
  letter-spacing: -.01em;
  text-wrap: pretty;
}

.muted { color: var(--fg-muted); }
.small { font-size: var(--step--1); }
.tiny { font-size: var(--step--2); }
.mono {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: .04em;
}

.measure { max-width: 62ch; }
.measure-sm { max-width: 46ch; }

.serif-accent { font-family: var(--font-display); font-style: italic; }

/* ------------------------------------------------- 5. Buttons & links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: .95rem 1.6rem;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .01em;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition: background .35s var(--ease), color .35s var(--ease),
              border-color .35s var(--ease), transform .35s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--forest); }

.btn--forest { background: var(--forest); color: var(--paper); }
.btn--forest:hover { background: var(--ink); }

.btn--ghost { border-color: var(--rule); color: inherit; }
.btn--ghost:hover { border-color: currentColor; background: rgba(12,13,14,.04); }
.section--dark .btn--ghost:hover,
.section--forest .btn--ghost:hover { background: rgba(255,255,255,.08); }

.btn--light { background: var(--paper); color: var(--ink); }
.btn--light:hover { background: var(--brass-200); }

.btn--sm { padding: .65rem 1.2rem; font-size: var(--step--2); }
.btn--lg { padding: 1.1rem 2rem; font-size: var(--step-0); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: var(--step--1);
  font-weight: 500;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--rule);
  transition: border-color .3s var(--ease), gap .3s var(--ease);
}
.link-arrow:hover { border-color: currentColor; gap: .8rem; }
.link-arrow svg { width: 13px; height: 13px; }

.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }

/* ------------------------------------------- 6. Header / navigation */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background .45s var(--ease), border-color .45s var(--ease),
              backdrop-filter .45s var(--ease), transform .5s var(--ease);
  border-bottom: 1px solid transparent;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 76px;
}
.header.is-stuck {
  background: rgba(251,250,247,.82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom-color: var(--rule-soft);
}
.header.is-hidden { transform: translateY(-100%); }

/* Header over a dark hero */
.header--on-dark { color: var(--paper); }
.header--on-dark.is-stuck {
  color: var(--ink);
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: -.02em;
  line-height: 1;
}
.logo__mark {
  width: 22px; height: 22px;
  align-self: center;
  flex: none;
}
.logo__mark path, .logo__mark rect { fill: currentColor; }
.logo__uk {
  font-family: var(--font-sans);
  font-size: .5rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  opacity: .55;
  align-self: center;
  padding-left: .1rem;
}

.nav { display: flex; align-items: center; gap: clamp(1rem, 2.2vw, 2.2rem); }
.nav__link {
  font-size: var(--step--1);
  font-weight: 450;
  position: relative;
  padding-block: .35rem;
  opacity: .85;
  transition: opacity .3s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .4s var(--ease);
}
.nav__link:hover { opacity: 1; }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav__link.is-active { opacity: 1; font-weight: 500; }

.header__actions { display: flex; align-items: center; gap: .9rem; }

.burger {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  place-items: center;
}
.burger span {
  display: block; width: 16px; height: 1.5px;
  background: currentColor;
  transition: transform .4s var(--ease), opacity .3s var(--ease);
}
.burger span + span { margin-top: 4px; }
body.menu-open .burger span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
body.menu-open .burger span:nth-child(2) { opacity: 0; }
body.menu-open .burger span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--ink);
  color: var(--paper);
  padding: 110px var(--gutter) 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  clip-path: inset(0 0 100% 0);
  transition: clip-path .7s var(--ease-out);
  pointer-events: none;
  overflow-y: auto;
}
body.menu-open .mobile-menu { clip-path: inset(0 0 0 0); pointer-events: auto; }
body.menu-open { overflow: hidden; }

.mobile-menu__nav a {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 9vw, 3.2rem);
  line-height: 1.15;
  padding-block: .35rem;
  border-bottom: 1px solid var(--rule-invert);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
body.menu-open .mobile-menu__nav a { opacity: 1; transform: none; }
body.menu-open .mobile-menu__nav a:nth-child(1) { transition-delay: .12s; }
body.menu-open .mobile-menu__nav a:nth-child(2) { transition-delay: .17s; }
body.menu-open .mobile-menu__nav a:nth-child(3) { transition-delay: .22s; }
body.menu-open .mobile-menu__nav a:nth-child(4) { transition-delay: .27s; }
body.menu-open .mobile-menu__nav a:nth-child(5) { transition-delay: .32s; }
body.menu-open .mobile-menu__nav a:nth-child(6) { transition-delay: .37s; }
body.menu-open .mobile-menu__nav a:nth-child(7) { transition-delay: .42s; }

.mobile-menu__foot { margin-top: 3rem; display: grid; gap: 1rem; }

/* ------------------------------------------------------------- 7. Hero */
.hero {
  position: relative;
  min-height: min(100svh, 900px);
  display: flex;
  align-items: flex-end;
  color: var(--paper);
  background: var(--ink);
  overflow: hidden;
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem);
  padding-top: 140px;
}
.hero__bg {
  position: absolute; inset: 0;
  z-index: 0;
}
.hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(12,13,14,.72) 0%, rgba(12,13,14,.25) 38%, rgba(12,13,14,.88) 100%);
}
.hero__content { position: relative; z-index: 2; width: 100%; }

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--step-5);
  line-height: .95;
  letter-spacing: -.02em;
  max-width: 15ch;
}
.hero__headline em { font-style: italic; color: var(--brass-200); }

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: clamp(2rem, 4vw, 3.5rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule-invert);
}

.hero__scroll {
  display: inline-flex; align-items: center; gap: .6rem;
  font-size: var(--step--2); letter-spacing: .18em; text-transform: uppercase;
  opacity: .7;
}
.hero__scroll span.dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--brass);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: .3; transform: scale(.8);} 50% { opacity: 1; transform: scale(1.25);} }

/* Interior page hero */
.page-hero {
  padding-top: clamp(9rem, 14vw, 13rem);
  padding-bottom: clamp(3rem, 6vw, 5.5rem);
  position: relative;
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: var(--step-4);
  line-height: .98;
  letter-spacing: -.02em;
  max-width: 18ch;
}
.page-hero__title em { font-style: italic; }

/* ------------------------------------------ 8. Sections & components */
.section-head {
  display: grid;
  gap: 1.25rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.section-head--split {
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}

/* Marquee / trust strip */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--rule);
  padding-block: 1.6rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex;
  gap: clamp(2.5rem, 6vw, 5rem);
  width: max-content;
  animation: slide 38s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }
.marquee__item {
  font-size: var(--step--1);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap;
  display: inline-flex; align-items: center; gap: .7rem;
}

/* Stat row */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); }
.stats__item {
  padding: clamp(1.5rem,3vw,2.5rem) clamp(1rem,2vw,2rem);
  border-left: 1px solid var(--rule);
}
.stats__item:first-child { border-left: 0; padding-left: 0; }
.stats__value {
  font-family: var(--font-display);
  font-size: var(--step-3);
  line-height: 1;
  letter-spacing: -.02em;
}
.stats__label {
  font-size: var(--step--1);
  color: var(--fg-muted);
  margin-top: .6rem;
  max-width: 22ch;
}

/* Cards */
.card {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(1.5rem, 2.6vw, 2.25rem);
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: .9rem;
  transition: border-color .4s var(--ease), transform .5s var(--ease), box-shadow .5s var(--ease);
}
.section--dark .card, .section--forest .card {
  background: rgba(255,255,255,.035);
  border-color: var(--rule-invert);
}
.card:hover {
  border-color: var(--stone-400);
  transform: translateY(-3px);
  box-shadow: 0 18px 44px -28px rgba(12,13,14,.35);
}
.section--dark .card:hover, .section--forest .card:hover {
  border-color: rgba(255,255,255,.34);
  box-shadow: none;
}
.card__num {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--brass);
  letter-spacing: .1em;
}
.card__title { font-size: var(--step-1); font-family: var(--font-display); letter-spacing: -.01em; line-height: 1.15; }
.card__body { font-size: var(--step--1); color: var(--fg-muted); }
.card--flat { background: transparent; border: 0; padding: 0; }

.icon-badge {
  width: 44px; height: 44px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  display: grid; place-items: center;
  flex: none;
}
.icon-badge svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.4; }

/* Feature list rows */
.rows { border-top: 1px solid var(--rule); }
.row-item {
  display: grid;
  grid-template-columns: 4rem minmax(0,1fr) minmax(0,1.1fr);
  gap: clamp(1rem, 3vw, 3rem);
  padding-block: clamp(1.75rem, 3vw, 2.6rem);
  border-bottom: 1px solid var(--rule);
  align-items: start;
  transition: background .4s var(--ease);
}
.row-item:hover { background: rgba(12,13,14,.02); }
.section--dark .row-item:hover { background: rgba(255,255,255,.03); }
.row-item__idx { font-family: var(--font-mono); font-size: var(--step--2); color: var(--fg-muted); padding-top: .3rem; }
.row-item__title { font-size: var(--step-2); font-family: var(--font-display); line-height: 1.05; letter-spacing: -.015em; }
.row-item__body { font-size: var(--step--1); color: var(--fg-muted); }
.row-item__tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }

.tag {
  font-size: var(--step--2);
  letter-spacing: .04em;
  padding: .3rem .7rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--fg-muted);
}

/* Pull quote */
.quote {
  font-family: var(--font-display);
  font-size: var(--step-3);
  line-height: 1.16;
  letter-spacing: -.015em;
  text-wrap: balance;
}
.quote__cite {
  margin-top: 2rem;
  display: flex; align-items: center; gap: 1rem;
  font-size: var(--step--1);
  color: var(--fg-muted);
}
.avatar {
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 1.1rem;
  background: var(--forest); color: var(--paper);
  flex: none;
}

/* Testimonial grid */
.testimonial {
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  height: 100%;
}
.testimonial__text { font-size: var(--step-0); line-height: 1.55; }
.testimonial__meta { margin-top: auto; display: flex; align-items: center; gap: .85rem; font-size: var(--step--1); }

/* Audience split panels */
.panel {
  position: relative;
  min-height: 460px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(1.75rem, 3vw, 2.75rem);
  color: var(--paper);
  overflow: hidden;
  border-radius: 4px;
  isolation: isolate;
}
.panel__bg { position: absolute; inset: 0; z-index: -2; transition: transform 1.1s var(--ease-out); }
.panel:hover .panel__bg { transform: scale(1.045); }
.panel::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(12,13,14,.15) 0%, rgba(12,13,14,.82) 100%);
}
.panel__kicker { font-size: var(--step--2); letter-spacing: .2em; text-transform: uppercase; opacity: .8; }
.panel__title { font-family: var(--font-display); font-size: var(--step-3); line-height: 1; margin-top: .6rem; }
.panel__body { font-size: var(--step--1); opacity: .82; margin-top: .9rem; max-width: 38ch; }
.panel__cta { margin-top: 1.5rem; }

/* Accordion */
.accordion { border-top: 1px solid var(--rule); }
.acc__item { border-bottom: 1px solid var(--rule); }
.acc__btn {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
  background: none; border: 0; cursor: pointer;
  padding: 1.4rem 0;
  text-align: left;
  font-size: var(--step-1);
  font-family: var(--font-display);
  letter-spacing: -.01em;
  line-height: 1.2;
}
.acc__icon { flex: none; width: 22px; height: 22px; position: relative; }
.acc__icon::before, .acc__icon::after {
  content: ""; position: absolute; inset: 50% 0 auto 0; height: 1px; background: currentColor;
  transition: transform .4s var(--ease);
}
.acc__icon::after { transform: rotate(90deg); }
.acc__item.is-open .acc__icon::after { transform: rotate(0); }
.acc__panel {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows .5s var(--ease);
}
.acc__item.is-open .acc__panel { grid-template-rows: 1fr; }
.acc__panel > div { overflow: hidden; }
.acc__panel p { padding-bottom: 1.6rem; color: var(--fg-muted); font-size: var(--step--1); max-width: 68ch; }

/* Tabs */
.tabs__nav { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 2.5rem; }
.tabs__btn {
  border: 1px solid var(--rule);
  background: transparent;
  border-radius: 999px;
  padding: .6rem 1.15rem;
  font-size: var(--step--1);
  cursor: pointer;
  color: var(--fg-muted);
  transition: all .35s var(--ease);
}
.tabs__btn:hover { color: var(--fg); border-color: var(--stone-400); }
.tabs__btn.is-active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.section--dark .tabs__btn.is-active { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.tabs__panel { display: none; }
.tabs__panel.is-active { display: block; animation: fadeUp .6s var(--ease-out) both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* Pricing */
.toggle {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 4px;
  gap: 2px;
}
.toggle button {
  border: 0; background: transparent; cursor: pointer;
  padding: .5rem 1.1rem; border-radius: 999px;
  font-size: var(--step--1); color: var(--fg-muted);
  transition: all .3s var(--ease);
}
.toggle button.is-active { background: var(--ink); color: var(--paper); }

.price-card {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(1.5rem, 2.6vw, 2.25rem);
  display: flex; flex-direction: column;
  background: var(--white);
  position: relative;
}
.price-card--featured {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  --rule: var(--rule-invert);
  --fg-muted: rgba(251,250,247,.62);
}
.price-card__flag {
  position: absolute; top: -1px; right: 1.5rem;
  background: var(--brass); color: var(--ink);
  font-size: var(--step--2); letter-spacing: .12em; text-transform: uppercase;
  padding: .3rem .7rem;
  border-radius: 0 0 3px 3px;
}
.price-card__name { font-family: var(--font-display); font-size: var(--step-2); line-height: 1; }
.price-card__price {
  font-family: var(--font-display);
  font-size: var(--step-4); line-height: 1;
  margin-top: 1.25rem; display: flex; align-items: baseline; gap: .35rem;
}
.price-card__price .cur { font-size: .5em; }
.price-card__per { font-size: var(--step--1); color: var(--fg-muted); }
.feature-list { list-style: none; padding: 0; margin: 1.75rem 0 2rem; display: grid; gap: .7rem; font-size: var(--step--1); }
.feature-list li { display: grid; grid-template-columns: 1.1rem 1fr; gap: .7rem; align-items: start; }
.feature-list svg { width: 13px; height: 13px; margin-top: .42em; stroke: var(--brass); fill: none; stroke-width: 2; }
.price-card .btn { margin-top: auto; width: 100%; }

.compare { width: 100%; border-collapse: collapse; font-size: var(--step--1); }
.compare th, .compare td { padding: 1rem .9rem; text-align: left; border-bottom: 1px solid var(--rule); vertical-align: top; }
.compare thead th { font-size: var(--step--2); letter-spacing: .14em; text-transform: uppercase; color: var(--fg-muted); font-weight: 500; }
.compare td:not(:first-child), .compare th:not(:first-child) { text-align: center; }
.compare tbody tr:hover { background: rgba(12,13,14,.02); }
.compare .yes { color: var(--forest); font-weight: 600; }
.compare .no { color: var(--stone-400); }
.compare .group-row td { background: var(--paper-warm); font-weight: 500; letter-spacing: .06em; text-transform: uppercase; font-size: var(--step--2); }

/* Timeline */
.timeline { border-left: 1px solid var(--rule); padding-left: clamp(1.5rem, 3vw, 2.5rem); display: grid; gap: 2.5rem; }
.timeline__item { position: relative; }
.timeline__item::before {
  content: ""; position: absolute;
  left: calc(-1 * clamp(1.5rem, 3vw, 2.5rem) - 4.5px);
  top: .55em; width: 8px; height: 8px; border-radius: 50%;
  background: var(--brass);
}
.timeline__year { font-family: var(--font-mono); font-size: var(--step--2); color: var(--brass); letter-spacing: .1em; }
.timeline__title { font-family: var(--font-display); font-size: var(--step-2); line-height: 1.05; margin-top: .35rem; }
.timeline__body { color: var(--fg-muted); font-size: var(--step--1); margin-top: .6rem; max-width: 60ch; }
@media (min-width: 900px) {
  .timeline--2col {
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(2.5rem, 5vw, 4.5rem);
    row-gap: 3rem;
  }
}

/* CTA band */
.cta-band {
  background: var(--forest);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.cta-band__inner { padding-block: clamp(4rem, 8vw, 7.5rem); position: relative; z-index: 1; }
.cta-band__glow {
  position: absolute; z-index: 0;
  width: 60vw; height: 60vw; max-width: 780px; max-height: 780px;
  right: -12%; top: -30%;
  background: radial-gradient(circle, rgba(180,152,106,.30), transparent 62%);
  border-radius: 50%;
  filter: blur(10px);
}

/* Editorial plate — abstract architectural artwork used in place of photography */
.plate {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: 4px;
  overflow: hidden;
  background: var(--ink);
}
.plate--wide { aspect-ratio: 16/10; }
.plate--square { aspect-ratio: 1; }
.plate svg { width: 100%; height: 100%; display: block; }
.plate__caption {
  position: absolute; left: 1.25rem; bottom: 1.15rem; right: 1.25rem;
  color: rgba(255,255,255,.78);
  font-size: var(--step--2);
  letter-spacing: .12em;
  text-transform: uppercase;
  display: flex; justify-content: space-between; gap: 1rem;
}

/* Note / callout */
.note {
  border-left: 2px solid var(--brass);
  padding: .35rem 0 .35rem 1.25rem;
  font-size: var(--step--1);
  color: var(--fg-muted);
}

/* ------------------------------------------------ 9. Product UI mockups */
.ui {
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--white);
  overflow: hidden;
  box-shadow: 0 40px 80px -50px rgba(12,13,14,.5), 0 2px 6px -2px rgba(12,13,14,.08);
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--ink);
}
.section--dark .ui, .section--forest .ui, .hero .ui {
  box-shadow: 0 50px 90px -40px rgba(0,0,0,.75);
  border-color: rgba(255,255,255,.14);
}
.ui__chrome {
  display: flex; align-items: center; gap: .5rem;
  padding: .65rem .9rem;
  border-bottom: 1px solid var(--rule-soft);
  background: var(--paper-warm);
}
.ui__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--stone-300); }
.ui__url {
  margin-left: .6rem; font-family: var(--font-mono); font-size: 10px;
  color: var(--ink-400); background: var(--white);
  border: 1px solid var(--rule-soft); border-radius: 4px;
  padding: .2rem .6rem; letter-spacing: .02em;
}
.ui__body { display: grid; grid-template-columns: 168px minmax(0,1fr); min-height: 380px; }
.ui__side {
  border-right: 1px solid var(--rule-soft);
  padding: 1rem .8rem;
  background: #FCFBF9;
  display: flex; flex-direction: column; gap: .15rem;
}
.ui__brand {
  font-family: var(--font-display); font-size: 1.05rem; letter-spacing: -.02em;
  padding: .1rem .5rem .9rem;
}
.ui__navitem {
  display: flex; align-items: center; gap: .55rem;
  padding: .42rem .5rem; border-radius: 5px; color: var(--ink-400);
  font-size: 11.5px;
}
.ui__navitem.is-active { background: var(--ink); color: var(--paper); }
.ui__navitem i { width: 6px; height: 6px; border-radius: 2px; background: currentColor; opacity: .55; flex: none; }
.ui__main { padding: 1.1rem 1.2rem; display: grid; gap: .9rem; align-content: start; }
.ui__h {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding-bottom: .8rem; border-bottom: 1px solid var(--rule-soft);
}
.ui__title { font-size: 15px; font-weight: 550; letter-spacing: -.01em; }
.ui__meta { font-size: 10.5px; color: var(--ink-400); font-family: var(--font-mono); }
.ui__kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: .55rem; }
.ui__kpi { border: 1px solid var(--rule-soft); border-radius: 6px; padding: .6rem .65rem; }
.ui__kpi b { display: block; font-family: var(--font-display); font-size: 1.15rem; font-weight: 400; line-height: 1.1; letter-spacing: -.01em; }
.ui__kpi span { font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-400); }
.ui__kpi em { font-style: normal; font-size: 10px; color: var(--forest); }
.ui__kpi em.dn { color: #A2543C; }

.ui__table { width: 100%; border-collapse: collapse; font-size: 11.5px; }
.ui__table th {
  text-align: left; font-weight: 500; font-size: 9.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-400);
  padding: .45rem .5rem; border-bottom: 1px solid var(--rule-soft);
}
.ui__table td { padding: .55rem .5rem; border-bottom: 1px solid var(--rule-soft); }
.ui__table tr:last-child td { border-bottom: 0; }
.ui__addr { font-weight: 500; }
.ui__sub { color: var(--ink-400); font-size: 10.5px; }

.pill {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: 9.5px; letter-spacing: .06em; text-transform: uppercase;
  padding: .18rem .5rem; border-radius: 999px;
  border: 1px solid var(--rule-soft);
}
.pill::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.pill--ok { color: #2E6B4F; background: rgba(46,107,79,.07); }
.pill--warn { color: #9A6A1E; background: rgba(154,106,30,.08); }
.pill--due { color: #A2543C; background: rgba(162,84,60,.08); }
.pill--info { color: #3C5B7A; background: rgba(60,91,122,.08); }

.ui__chart { border: 1px solid var(--rule-soft); border-radius: 6px; padding: .8rem; }
.ui__bars { display: flex; align-items: flex-end; gap: 6px; height: 84px; }
.ui__bars i { flex: 1; background: var(--stone-300); border-radius: 2px 2px 0 0; display: block; }
.ui__bars i.hi { background: var(--forest); }
.ui__legend { display: flex; gap: 1rem; font-size: 9.5px; color: var(--ink-400); margin-top: .6rem; letter-spacing: .06em; text-transform: uppercase; }

.ui--float {
  position: absolute;
  width: 260px;
  border-radius: 8px;
  padding: .85rem .95rem;
  background: var(--white);
  border: 1px solid var(--rule-soft);
  box-shadow: 0 30px 60px -30px rgba(12,13,14,.45);
  display: grid; gap: .5rem;
}
.ui-stack { position: relative; }

/* ------------------------------------------------------------ 10. Forms */
.field { display: grid; gap: .45rem; }
.field label { font-size: var(--step--2); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-muted); }
.field input, .field select, .field textarea {
  width: 100%;
  background: transparent;
  border: 0; border-bottom: 1px solid var(--rule);
  padding: .7rem 0;
  font-size: var(--step-0);
  border-radius: 0;
  transition: border-color .3s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: var(--stone-400); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-bottom-color: var(--forest);
}
.section--dark .field input:focus, .section--dark .field textarea:focus,
.section--dark .field select:focus { border-bottom-color: var(--brass); }
.field textarea { resize: vertical; min-height: 120px; }
.field select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'><path d='M2 4l4 4 4-4' fill='none' stroke='%236B6862' stroke-width='1.4'/></svg>");
  background-repeat: no-repeat; background-position: right .2rem center; background-size: 12px;
}
.section--dark .field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'><path d='M2 4l4 4 4-4' fill='none' stroke='%23BDB4A3' stroke-width='1.4'/></svg>");
}
.section--dark option { color: var(--ink); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.75rem; }
.form-grid .full { grid-column: 1 / -1; }
.checkline { display: flex; gap: .7rem; align-items: flex-start; font-size: var(--step--1); color: var(--fg-muted); }
.checkline input { width: 16px; height: 16px; margin-top: .25em; accent-color: var(--forest); flex: none; }

.form-success {
  display: none;
  border: 1px solid var(--rule);
  border-left: 2px solid var(--brass);
  padding: 1.5rem;
  font-size: var(--step--1);
}
.form-success.is-visible { display: block; animation: fadeUp .5s var(--ease-out) both; }

/* ----------------------------------------------------------- 11. Footer */
.footer { background: var(--ink); color: var(--paper); --rule: var(--rule-invert); --fg-muted: rgba(251,250,247,.55); }
.footer__top { padding-block: clamp(3.5rem, 6vw, 5.5rem); }
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0,1.4fr) repeat(3, minmax(0,1fr));
  gap: clamp(2rem, 4vw, 3.5rem);
}
.footer__col h5 {
  font-size: var(--step--2); letter-spacing: .18em; text-transform: uppercase;
  color: var(--fg-muted); font-weight: 500; margin-bottom: 1.1rem;
}
.footer__col ul { list-style: none; padding: 0; display: grid; gap: .65rem; font-size: var(--step--1); }
.footer__col a { opacity: .8; transition: opacity .3s var(--ease); }
.footer__col a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 4px; }
.footer__bottom {
  border-top: 1px solid var(--rule);
  padding-block: 1.6rem;
  display: flex; flex-wrap: wrap; gap: 1rem 2rem;
  justify-content: space-between; align-items: center;
  font-size: var(--step--2); color: var(--fg-muted);
}
.footer__legal { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer__wordmark {
  font-family: var(--font-display);
  font-size: clamp(4rem, 17vw, 15rem);
  line-height: .8;
  letter-spacing: -.03em;
  opacity: .07;
  user-select: none;
  padding-bottom: .06em;
  white-space: nowrap;
}

/* ------------------------------------------------- 12. Motion & reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .9s var(--ease-out), transform .9s var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }
[data-reveal][data-delay="3"] { transition-delay: .24s; }
[data-reveal][data-delay="4"] { transition-delay: .32s; }
[data-reveal][data-delay="5"] { transition-delay: .40s; }

.reveal-mask { overflow: hidden; display: block; }
.reveal-mask > span {
  display: block;
  transform: translateY(105%);
  transition: transform 1s var(--ease-out);
}
.is-in .reveal-mask > span, .reveal-mask.is-in > span { transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .reveal-mask > span { transform: none; }
}

/* ------------------------------------------------------ 13. Responsive */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats__item:nth-child(3) { border-left: 0; padding-left: 0; }
  .stats__item { border-top: 1px solid var(--rule); }
  .stats__item:nth-child(-n+2) { border-top: 0; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .nav, .header__actions .btn { display: none; }
  .burger { display: grid; }
  .split, .split--lead, .section-head--split { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .row-item { grid-template-columns: 2.5rem minmax(0,1fr); }
  .row-item__body-cell { grid-column: 2; }
  .form-grid { grid-template-columns: 1fr; gap: 1.4rem; }
  .ui__body { grid-template-columns: 1fr; }
  .ui__side { display: none; }
  .ui__kpis { grid-template-columns: 1fr 1fr; }
  .compare-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .compare-scroll .compare { min-width: 680px; }
  .compare th, .compare td { padding: .8rem .6rem; }
}

@media (max-width: 640px) {
  .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .stats__item { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); }
  .stats__item:first-child { border-top: 0; }
  .hero { min-height: auto; padding-top: 130px; padding-bottom: 3rem; }
  .hero__meta { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .footer__grid { grid-template-columns: 1fr; }
  .panel { min-height: 380px; }
  .ui--float { position: static; width: auto; margin-top: 1rem; }
}

/* Utilities */
.u-hide-mobile { }
@media (max-width: 640px) { .u-hide-mobile { display: none !important; } }
.u-mt-0 { margin-top: 0 !important; }
.u-mt-1 { margin-top: 1rem; }
.u-mt-2 { margin-top: 2rem; }
.u-mt-3 { margin-top: 3rem; }
.u-mb-2 { margin-bottom: 2rem; }
.u-full { grid-column: 1 / -1; }