/* ==========================================================
   Xfervent — design tokens
   ========================================================== */
:root {
  /* Neutral scale (warm-cool neutral, low chroma) */
  --bg:          #fcfcfd;
  --bg-alt:      #f7f8f9;
  --surface:     #ffffff;
  --surface-2:   #fafbfc;

  --border:      #e6e8ec;
  --border-soft: #eef0f3;
  --border-firm: #d7dae0;

  --text:        #14161a;
  --text-2:      #4a5057;
  --text-3:      #6d747d;
  --text-4:      #8b929b;

  /* Restrained accent */
  --accent:      #3a5bd9;
  --accent-ink:  #2f4ab4;
  --accent-soft: #eef1fd;

  --ok:          #2f8f5b;

  /* Typography */
  --font: "Inter var", Inter, ui-sans-serif, system-ui, -apple-system,
          "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  /* Spacing / layout */
  --gutter: 24px;
  --maxw: 1140px;
  --radius: 8px;
  --radius-lg: 12px;

  /* Elevation — very soft, never glossy */
  --shadow-sm: 0 1px 2px rgba(16, 20, 28, .04);
  --shadow-md: 0 1px 2px rgba(16, 20, 28, .04), 0 4px 12px rgba(16, 20, 28, .04);
  --shadow-lg: 0 1px 2px rgba(16, 20, 28, .04), 0 8px 24px rgba(16, 20, 28, .06),
               0 24px 48px rgba(16, 20, 28, .04);

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ==========================================================
   Reset / base
   ========================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.021em;
  line-height: 1.15;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

button { font: inherit; color: inherit; }

/* Focus: visible, consistent, never removed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: #d9e0fb; color: var(--text); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0; left: 50%;
  transform: translate(-50%, -120%);
  z-index: 200;
  padding: 10px 18px;
  background: var(--text);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

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

/* ==========================================================
   Buttons
   ========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 19px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: -0.008em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .16s var(--ease), border-color .16s var(--ease),
              color .16s var(--ease), transform .16s var(--ease),
              box-shadow .16s var(--ease);
}
.btn:active { transform: translateY(.5px); }

.btn-primary {
  background: var(--text);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: #24272d; }

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-firm);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { background: var(--bg-alt); border-color: #c6cad2; }

.btn-sm { padding: 8px 15px; font-size: 14px; }

.btn-icon {
  width: 15px; height: 15px;
  transition: transform .18s var(--ease);
}
.btn-ghost:hover .btn-icon { transform: translateX(2px); }

/* ==========================================================
   Header
   ========================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.site-header.is-stuck {
  border-bottom-color: var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 16.5px;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.brand-mark { width: 19px; height: 19px; color: var(--text); }
.brand-name { color: var(--text); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-list a {
  position: relative;
  font-size: 14.5px;
  color: var(--text-2);
  transition: color .16s var(--ease);
}
.nav-list a:hover { color: var(--text); }
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -5px;
  height: 1.5px;
  background: var(--text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s var(--ease);
}
.nav-list a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color .16s var(--ease), border-color .16s var(--ease);
}
.nav-toggle:hover { background: var(--bg-alt); border-color: var(--border-firm); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px; height: 10px;
}
.nav-toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .22s var(--ease), opacity .16s var(--ease);
}
.nav-toggle-bars span:nth-child(1) { top: 0; }
.nav-toggle-bars span:nth-child(2) { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(4.25px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) {
  transform: translateY(-4.25px) rotate(-45deg);
}

/* ==========================================================
   Hero
   ========================================================== */
.hero {
  position: relative;
  padding: clamp(76px, 12vw, 132px) 0 clamp(48px, 6vw, 68px);
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
  /* fade the grid out — subtle texture, not decoration */
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 22%, #000 0%, transparent 100%);
          mask-image: radial-gradient(ellipse 78% 62% at 50% 22%, #000 0%, transparent 100%);
  opacity: .75;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 880px;
  text-align: center;
}

.status-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  padding: 5px 13px 5px 11px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: -0.004em;
}
.status-dot {
  position: relative;
  width: 6px; height: 6px;
  background: var(--ok);
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 1px solid var(--ok);
  border-radius: 50%;
  opacity: .45;
  animation: ping 2.6s var(--ease) infinite;
}
@keyframes ping {
  0%        { transform: scale(.7); opacity: .5; }
  70%, 100% { transform: scale(1.5); opacity: 0; }
}

.hero-title {
  font-size: clamp(2.35rem, 6.2vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.06;
}

.hero-sub {
  margin: 22px auto 0;
  max-width: 620px;
  font-size: clamp(1.03rem, 1.9vw, 1.175rem);
  line-height: 1.55;
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 11px;
  margin-top: 34px;
}

/* ==========================================================
   Sections
   ========================================================== */
.section { padding: clamp(60px, 8.5vw, 104px) 0; }
.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border-soft);
}
.section-product { padding-top: clamp(8px, 2vw, 20px); }

.section-head {
  max-width: 660px;
  margin-bottom: clamp(38px, 5vw, 56px);
}
.eyebrow {
  margin-bottom: 14px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .085em;
  text-transform: uppercase;
  color: var(--text-4);
}
.section-title {
  font-size: clamp(1.65rem, 3.7vw, 2.4rem);
  letter-spacing: -0.03em;
  line-height: 1.13;
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ==========================================================
   Product mockup
   ========================================================== */
.app-frame {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.app-frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.app-frame-label {
  font-size: 13px;
  font-weight: 550;
  color: var(--text);
  letter-spacing: -0.006em;
}
.app-frame-note {
  font-size: 11.5px;
  color: var(--text-4);
  font-family: var(--mono);
  letter-spacing: -0.01em;
}

.app {
  display: grid;
  grid-template-columns: 202px minmax(0, 1fr) 224px;
  min-height: 428px;
  font-size: 13px;
}

/* — Sidebar — */
.app-sidebar {
  padding: 14px;
  background: var(--surface-2);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.app-search {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-4);
  font-size: 12.5px;
}
.app-search-icon { width: 13px; height: 13px; flex-shrink: 0; }
.app-search kbd {
  margin-left: auto;
  padding: 1px 4px;
  font-family: var(--font);
  font-size: 10.5px;
  color: var(--text-4);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.app-nav, .app-sidebar-group { display: flex; flex-direction: column; gap: 1px; }
.app-nav-item, .app-project {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  border-radius: 6px;
  color: var(--text-2);
  font-size: 12.5px;
  letter-spacing: -0.005em;
}
.app-nav-item.is-active {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  color: var(--text);
  font-weight: 500;
  padding: 5px 8px;
}
.app-sidebar-title {
  padding: 0 9px;
  margin-bottom: 6px;
  font-size: 10.5px;
  font-weight: 550;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-4);
}
.app-project { color: var(--text-3); }
.app-project.is-active {
  color: var(--accent-ink);
  background: var(--accent-soft);
  font-weight: 500;
}

/* Tiny inline glyphs */
.app-ico {
  width: 13px; height: 13px;
  flex-shrink: 0;
  border-radius: 2.5px;
  border: 1.25px solid currentColor;
  opacity: .5;
}
.app-ico-layers { border-radius: 2px; box-shadow: 0 3px 0 -1.25px currentColor; height: 8px; }
.app-ico-box    { border-radius: 3px; }
.app-ico-doc    { border-radius: 2px; width: 10.5px; height: 13px; }
.app-ico-check  { border-radius: 50%; }
.app-ico-book   { border-radius: 2px 4px 4px 2px; }

/* — Main — */
.app-main {
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}
.app-crumb {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--text-4);
}
.app-crumb-sep { color: var(--border-firm); }
.app-crumb-current { color: var(--text-2); }

.app-head {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-wrap: wrap;
}
.app-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.022em;
}
.app-chip {
  padding: 2.5px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  background: var(--surface-2);
}
.app-chip-active {
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-color: #dbe1fa;
}
.app-context {
  margin-top: -6px;
  font-size: 13.5px;
  color: var(--text-2);
}

.app-card {
  padding: 13px 15px 15px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 9px;
}
.app-card-ai {
  background: linear-gradient(180deg, #fbfcff 0%, var(--surface) 100%);
  border-color: #e2e7f9;
}
.app-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 9px;
}
.app-card-title {
  font-size: 12px;
  font-weight: 550;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-4);
}
.app-card-meta { font-size: 11px; color: var(--text-4); }

.app-ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  font-weight: 550;
  color: var(--accent-ink);
  letter-spacing: -0.004em;
}
.app-ai-badge svg { width: 13px; height: 13px; }
.app-ai-text {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text);
}
.app-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 11px;
}
.app-source {
  padding: 3px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 11px;
  color: var(--text-3);
}

.app-work { display: flex; flex-direction: column; }
.app-work-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 2px;
  border-top: 1px solid var(--border-soft);
}
.app-work-item:first-child { border-top: 0; padding-top: 2px; }
.app-work-state {
  width: 11px; height: 11px;
  border: 1.5px solid var(--border-firm);
  border-radius: 50%;
  flex-shrink: 0;
}
.app-work-state.is-progress {
  border-color: var(--accent);
  background:
    conic-gradient(var(--accent) 0 50%, transparent 50% 100%);
}
.app-work-name {
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.app-tag {
  margin-left: auto;
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 10.5px;
  color: var(--text-3);
  background: var(--surface-2);
  flex-shrink: 0;
}

/* — Right rail — */
.app-rail {
  padding: 18px 16px;
  background: var(--surface-2);
  border-left: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.app-rail-block { display: flex; flex-direction: column; gap: 7px; }
.app-rail-title {
  font-size: 10.5px;
  font-weight: 550;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 2px;
}
.app-rail-doc {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 13px;
  padding-left: 11px;
}
.app-timeline::before {
  content: "";
  position: absolute;
  left: 2.5px; top: 5px; bottom: 5px;
  width: 1px;
  background: var(--border);
}
.app-timeline li {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 7px;
  font-size: 11.5px;
}
.app-tl-dot {
  position: absolute;
  left: -11px; top: 5px;
  width: 6px; height: 6px;
  background: var(--surface-2);
  border: 1.5px solid var(--border-firm);
  border-radius: 50%;
}
.app-timeline li:first-child .app-tl-dot {
  border-color: var(--accent);
  background: var(--accent);
}
.app-tl-text { color: var(--text-2); }
.app-tl-time {
  margin-left: auto;
  color: var(--text-4);
  font-size: 10.5px;
  flex-shrink: 0;
}

/* ==========================================================
   Problem
   ========================================================== */
.problem { padding-top: 22px; border-top: 1px solid var(--border-firm); }
.problem-title {
  font-size: 1.02rem;
  margin-bottom: 9px;
  letter-spacing: -0.018em;
}
.problem-text { font-size: 14.5px; color: var(--text-2); }

/* ==========================================================
   Steps
   ========================================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.step {
  position: relative;
  padding: 26px 24px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease),
              transform .2s var(--ease);
}
.step:hover {
  border-color: var(--border-firm);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.step-num {
  display: block;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: .03em;
}
.step-title {
  font-size: 1.02rem;
  margin-bottom: 9px;
  letter-spacing: -0.018em;
}
.step-text { font-size: 14.5px; color: var(--text-2); }

/* ==========================================================
   Features
   ========================================================== */
.feature {
  padding: 26px 26px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease),
              transform .2s var(--ease);
}
.feature:hover {
  border-color: var(--border-firm);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  margin-bottom: 16px;
  background: var(--accent-soft);
  border: 1px solid #e0e5fa;
  border-radius: 8px;
  color: var(--accent-ink);
}
.feature-icon svg { width: 19px; height: 19px; }
.feature-title {
  font-size: 1.02rem;
  margin-bottom: 9px;
  letter-spacing: -0.018em;
}
.feature-text { font-size: 14.5px; color: var(--text-2); }

/* Planned integrations — explicitly labelled, not implied */
.planned {
  margin-top: 26px;
  padding: 24px 26px 26px;
  border: 1px dashed var(--border-firm);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}
.planned-label {
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .085em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 14px;
}
.planned-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.planned-list li {
  padding: 6px 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-2);
}
.planned-note {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-4);
  max-width: 62ch;
}

/* ==========================================================
   Personas
   ========================================================== */
.persona {
  padding: 24px 24px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.persona:hover { border-color: var(--border-firm); box-shadow: var(--shadow-md); }
.persona-title {
  font-size: 1.02rem;
  margin-bottom: 9px;
  letter-spacing: -0.018em;
}
.persona-text { font-size: 14.5px; color: var(--text-2); }

/* ==========================================================
   Callout (early by design)
   ========================================================== */
.callout {
  position: relative;
  padding: clamp(36px, 5vw, 56px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  overflow: hidden;
}
.callout::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .5;
}
.callout-title {
  font-size: clamp(1.6rem, 3.4vw, 2.15rem);
  letter-spacing: -0.03em;
}
.callout-text {
  margin: 16px auto 28px;
  max-width: 60ch;
  font-size: 1.02rem;
  color: var(--text-2);
}

/* ==========================================================
   About / prose
   ========================================================== */
.prose { max-width: 68ch; }
.prose .section-title { margin-bottom: 22px; }
.prose p {
  font-size: 1.02rem;
  color: var(--text-2);
  margin-bottom: 15px;
}
.prose p:first-of-type {
  font-size: 1.13rem;
  color: var(--text);
  letter-spacing: -0.012em;
}
.prose p:last-child { margin-bottom: 0; }

/* ==========================================================
   Contact
   ========================================================== */
.contact { max-width: 640px; }
.contact-text {
  margin-top: 16px;
  font-size: 1.02rem;
  color: var(--text-2);
}
.contact-email {
  display: inline-block;
  margin-top: 26px;
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.022em;
  color: var(--text);
  border-bottom: 1.5px solid var(--border-firm);
  padding-bottom: 3px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.contact-email:hover { color: var(--accent-ink); border-color: var(--accent); }
.contact-actions { margin-top: 30px; }

/* ==========================================================
   Footer
   ========================================================== */
.site-footer {
  padding: clamp(48px, 6vw, 68px) 0 32px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
.footer-brand { max-width: 300px; }
.footer-tag {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-3);
}
.footer-nav-title {
  font-size: 12px;
  font-weight: 550;
  letter-spacing: .075em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 14px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a {
  font-size: 14px;
  color: var(--text-2);
  transition: color .16s var(--ease);
}
.footer-nav a:hover { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-4);
}
.footer-bottom a { transition: color .16s var(--ease); }
.footer-bottom a:hover { color: var(--text-2); }

/* ==========================================================
   Legal pages
   ========================================================== */
.legal { padding: clamp(56px, 8vw, 92px) 0 clamp(48px, 6vw, 72px); }
.legal-inner { max-width: 70ch; }
.legal h1 {
  font-size: clamp(1.85rem, 4.2vw, 2.5rem);
  letter-spacing: -0.03em;
}
.legal-updated {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--text-4);
  font-family: var(--mono);
}
.legal h2 {
  margin-top: 42px;
  margin-bottom: 12px;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.legal p, .legal li {
  font-size: 15.5px;
  color: var(--text-2);
  margin-bottom: 13px;
}
.legal ul { padding-left: 20px; list-style: disc; }
.legal li { padding-left: 4px; }
.legal a {
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal a:hover { color: var(--accent); }
.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 44px;
  font-size: 14px;
  color: var(--text-2);
}
.legal-back:hover { color: var(--text); }

/* ==========================================================
   Scroll reveal
   ========================================================== */
/* Hidden only when JS is active. The `reveal-failsafe` animation guarantees
   content becomes visible even if main.js errors or never runs, so text can
   never be permanently stuck at opacity 0. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: calc(var(--d, 0) * 70ms);
  will-change: opacity, transform;
  animation: reveal-failsafe 0s linear 3s forwards;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  animation: none;
}
@keyframes reveal-failsafe {
  to { opacity: 1; transform: none; }
}
[data-reveal-delay="1"] { --d: 1; }
[data-reveal-delay="2"] { --d: 2; }
[data-reveal-delay="3"] { --d: 3; }

/* ==========================================================
   Responsive
   ========================================================== */

/* Product mockup: drop the right rail before it gets cramped */
@media (max-width: 1000px) {
  .app { grid-template-columns: 186px minmax(0, 1fr); min-height: 0; }
  .app-rail {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid var(--border-soft);
    flex-direction: row;
    gap: 32px;
  }
  .app-rail-block { flex: 1; min-width: 0; }
}

@media (max-width: 860px) {
  .grid-2, .grid-3, .steps { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 32px; }
}

/* Mobile navigation */
@media (max-width: 800px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);

    /* closed state */
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity .2s var(--ease), transform .2s var(--ease),
                visibility .2s var(--ease);
  }
  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list li + li { border-top: 1px solid var(--border-soft); }
  .nav-list a {
    display: block;
    padding: 14px 2px;
    font-size: 15.5px;
    color: var(--text);
  }
  .nav-list a::after { display: none; }
  .nav-cta {
    margin-top: 16px;
    padding: 12px 18px;
    justify-content: center;
  }
}

@media (max-width: 680px) {
  :root { --gutter: 20px; }

  .app { grid-template-columns: 1fr; }
  .app-sidebar { display: none; }
  .app-main { padding: 16px 16px 20px; }
  .app-rail { flex-direction: column; gap: 20px; padding: 16px; }
  .app-frame-bar { flex-direction: column; align-items: flex-start; gap: 3px; }

  .hero { padding-top: 56px; }
  .hero-inner { text-align: left; }
  .hero-sub { margin-inline: 0; }
  .hero-actions { justify-content: flex-start; }
  .hero-grid {
    -webkit-mask-image: radial-gradient(ellipse 120% 55% at 30% 15%, #000 0%, transparent 100%);
            mask-image: radial-gradient(ellipse 120% 55% at 30% 15%, #000 0%, transparent 100%);
  }

  .btn { width: 100%; }
  .hero-actions .btn { width: auto; flex: 1 1 auto; min-width: 0; }
  .callout { text-align: left; }
  .callout-text { margin-inline: 0; }
}

@media (max-width: 420px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
}

/* ==========================================================
   Motion / print preferences
   ========================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .site-header, .nav-toggle, .hero-grid { display: none; }
  body { background: #fff; }
  .js [data-reveal] { opacity: 1; transform: none; }
}