/* ==========================================================
   Stella Automation Studio: modern consulting, refined detail
   Palette: Ivory · Stone · Charcoal · Slate · Champagne accent
   ========================================================== */

:root {
  --ivory: #F6F4F0;
  --paper: #FFFFFF;
  --stone: #ECE8E1;
  --line: #DAD4CA;
  --muted: #8A857D;
  --slate: #4B4E53;
  --charcoal: #1E1E1F;
  --charcoal-2: #2A2A2C;
  --champagne: #B89A6A;
  --champagne-light: #D9C6A3;
  --green: #5F8A6B;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", Arial, sans-serif;

  --container: 1200px;
  --radius: 4px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--ivory);
  color: var(--charcoal);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; line-height: 1.08; letter-spacing: -.015em; }
h3 { font-family: var(--sans); font-weight: 600; font-size: 18px; line-height: 1.3; letter-spacing: -.005em; }
p { margin: 0 0 1em; }

.container { width: min(var(--container), 100% - 48px); margin-inline: auto; }
.section { padding: clamp(80px, 11vw, 136px) 0; }

.skip-link {
  position: absolute; left: -999px; top: 12px;
  background: var(--charcoal); color: var(--ivory); padding: 8px 16px; z-index: 100;
}
.skip-link:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--champagne); outline-offset: 3px; }

/* ---------- Type helpers ---------- */
.eyebrow {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--slate);
  margin-bottom: 20px;
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--champagne); }

.section-title { font-size: clamp(34px, 4.4vw, 52px); }
.section-head { max-width: 680px; margin-bottom: clamp(44px, 6vw, 72px); }
.section-lede { color: var(--slate); margin-top: 20px; font-size: 17px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  background: var(--charcoal);
  color: var(--ivory);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .01em;
  padding: 15px 28px;
  border: 1px solid var(--charcoal);
  border-radius: var(--radius);
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.btn:hover { background: var(--charcoal-2); border-color: var(--champagne); }
.btn-small { padding: 10px 18px; font-size: 13px; }
.btn-light { background: var(--ivory); color: var(--charcoal); border-color: var(--ivory); }
.btn-light:hover { background: var(--paper); border-color: var(--champagne); }

.link-arrow {
  text-decoration: none;
  font-size: 14px; font-weight: 500;
  display: inline-flex; gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: gap .3s var(--ease), border-color .3s;
}
.link-arrow:hover { gap: 14px; border-color: var(--champagne); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  padding: 20px 0;
  transition: background .35s var(--ease), box-shadow .35s var(--ease), padding .35s var(--ease);
}
.site-header.scrolled {
  background: rgba(246, 244, 240, .94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
  padding: 12px 0;
}
.nav { display: flex; align-items: center; justify-content: space-between; }

.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border-radius: var(--radius);
  background: var(--charcoal); color: var(--champagne-light);
  display: grid; place-items: center; font-size: 16px;
}
.brand-svg { display: block; width: 22px; height: 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-family: var(--serif); font-size: 21px; letter-spacing: .2em; text-transform: uppercase; }
.brand-sub { font-size: 9.5px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase; color: var(--muted); margin-top: 5px; }

.nav-links { list-style: none; display: flex; align-items: center; gap: 30px; margin: 0; padding: 0; }
.nav-links a:not(.btn) { text-decoration: none; font-size: 14px; font-weight: 500; color: var(--slate); transition: color .25s; }
.nav-links a:not(.btn):hover { color: var(--charcoal); }

.nav-toggle {
  display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer;
  position: relative; z-index: 60;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--charcoal);
  margin: 6px auto; transition: transform .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(140px, 18vw, 190px) 0 clamp(80px, 10vw, 120px);
  background:
    linear-gradient(var(--ivory), rgba(246, 244, 240, .0) 40%),
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(30, 30, 31, .045) 119px 120px);
}
.hero-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: clamp(40px, 6vw, 90px); align-items: center; }
.hero-title { font-size: clamp(44px, 5.6vw, 80px); line-height: 1.02; letter-spacing: -.025em; margin-bottom: 28px; }
.hero-lede { max-width: 560px; font-size: clamp(17px, 1.5vw, 19px); color: var(--slate); margin-bottom: 38px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; }

.hero-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 30px 60px -30px rgba(30, 30, 31, .25), 0 2px 6px rgba(30, 30, 31, .04);
  padding: 26px;
}
.panel-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--stone); }
.panel-title { font-weight: 600; font-size: 15px; }
.panel-status { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 500; color: var(--green); background: rgba(95, 138, 107, .1); padding: 5px 10px; border-radius: 20px; }
.panel-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.panel-steps { list-style: none; margin: 8px 0 0; padding: 0; position: relative; }
.panel-steps::before { content: ""; position: absolute; left: 11px; top: 26px; bottom: 26px; width: 1px; background: var(--line); }
.panel-steps li { display: flex; gap: 16px; align-items: center; padding: 13px 0; position: relative; }
.step-check {
  flex: none; width: 23px; height: 23px; border-radius: 50%;
  background: var(--charcoal); position: relative;
}
.step-check::after {
  content: ""; position: absolute; left: 8px; top: 5px; width: 5px; height: 9px;
  border: solid var(--champagne-light); border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.panel-steps b { display: block; font-size: 14.5px; font-weight: 500; }
.panel-steps small { display: block; font-size: 12.5px; color: var(--muted); }
.panel-foot { margin: 14px 0 0; padding-top: 14px; border-top: 1px solid var(--stone); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }

/* ---------- Tools strip ---------- */
.tools { border-block: 1px solid var(--line); padding: 24px 0; background: var(--paper); }
.tools-inner { display: flex; align-items: center; gap: 36px; flex-wrap: wrap; }
.tools-label { font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.tools-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 30px; font-size: 15px; font-weight: 500; color: var(--slate); }

/* ---------- Intro ---------- */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 110px); align-items: start; }
.intro-copy { color: var(--slate); font-size: 17px; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 40px 0 0; border-top: 1px solid var(--line); padding-top: 28px; }
.facts dt { font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.facts dd { margin: 0; font-family: var(--serif); font-size: 26px; color: var(--charcoal); line-height: 1.2; }

/* ---------- Services ---------- */
.services { background: var(--stone); }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.service-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px 28px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -24px rgba(30, 30, 31, .3); border-color: var(--champagne-light); }
.service-num { font-size: 13px; font-weight: 600; color: var(--champagne); letter-spacing: .06em; }
.service-card h3 { font-size: 20px; margin: 30px 0 12px; }
.service-card p { color: var(--slate); font-size: 15px; }
.service-card ul { list-style: none; padding: 18px 0 0; margin: 18px 0 0; border-top: 1px solid var(--stone); font-size: 14px; color: var(--charcoal); }
.service-card li { padding: 4px 0 4px 18px; position: relative; }
.service-card li::before { content: ""; position: absolute; left: 0; top: 13px; width: 8px; height: 2px; background: var(--champagne); }

/* ---------- Use cases ---------- */
.work-list { border-top: 1px solid var(--line); }
.work-item {
  display: grid; grid-template-columns: 200px 1fr 1.15fr; gap: 16px 48px;
  padding: 40px 0; border-bottom: 1px solid var(--line); align-items: start;
}
.work-meta { font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); padding-top: 8px; }
.work-item h3 { font-family: var(--serif); font-weight: 400; font-size: clamp(24px, 2.5vw, 30px); letter-spacing: -.01em; grid-column: 2; }
.work-item p { grid-column: 3; grid-row: 1; color: var(--slate); margin: 0; font-size: 15.5px; }
.flow { grid-column: 2 / -1; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.flow span {
  font-size: 12.5px; font-weight: 500;
  padding: 7px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper);
}
.flow i { width: 24px; height: 1px; background: var(--muted); position: relative; }
.flow i::after {
  content: ""; position: absolute; right: 0; top: -3px; width: 6px; height: 6px;
  border-top: 1px solid var(--muted); border-right: 1px solid var(--muted); transform: rotate(45deg);
}

/* ---------- Approach ---------- */
.process { background: var(--charcoal); color: var(--ivory); }
.process .eyebrow { color: var(--champagne-light); }
.process-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: step; }
.process-steps li { border-top: 2px solid rgba(246, 244, 240, .16); padding-top: 26px; position: relative; }
.process-steps li::before { content: ""; position: absolute; top: -2px; left: 0; width: 40px; height: 2px; background: var(--champagne); }
.process-steps span { font-size: 13px; font-weight: 600; color: var(--champagne-light); letter-spacing: .06em; }
.process-steps h3 { font-family: var(--serif); font-weight: 400; font-size: 30px; margin: 16px 0 12px; }
.process-steps p { color: rgba(246, 244, 240, .68); font-size: 15px; }

/* ---------- Audience ---------- */
.audience-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.audience-cols > div { padding: 32px 32px 8px 0; }
.audience-cols > div + div { padding-left: 32px; border-left: 1px solid var(--line); }
.audience-cols h3 { margin-bottom: 12px; }
.audience-cols p { color: var(--slate); font-size: 15.5px; }

/* ---------- Security ---------- */
.security { background: var(--paper); border-block: 1px solid var(--line); }
.security-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 7vw, 100px); }
.security-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; }
.security-list li { padding: 24px 0; border-top: 1px solid var(--stone); }
.security-list h3 { font-size: 16.5px; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.security-list h3::before { content: ""; width: 8px; height: 8px; background: var(--champagne); border-radius: 1px; flex: none; }
.security-list p { color: var(--slate); font-size: 15px; margin: 0; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: .75fr 1fr; gap: clamp(48px, 7vw, 96px); align-items: center; }
.portrait { margin: 0; position: relative; aspect-ratio: 4 / 5; width: 100%; max-width: 380px; justify-self: end; }
.portrait img, .portrait-placeholder {
  width: 100%; height: 100%; object-fit: cover; border-radius: 6px;
}
.portrait::after {
  content: ""; position: absolute; left: -14px; bottom: -14px; width: 38%; height: 38%;
  border-left: 2px solid var(--champagne); border-bottom: 2px solid var(--champagne);
  pointer-events: none;
}
.portrait-placeholder { display: none; background: var(--stone); place-items: center; font-size: 40px; color: var(--muted); }
.portrait.is-placeholder .portrait-placeholder { display: grid; }
.about-lead { font-family: var(--serif); font-size: clamp(22px, 2.2vw, 27px); line-height: 1.35; margin: 22px 0 24px; color: var(--charcoal); }
.about-copy > p:not(.about-lead):not(.eyebrow) { color: var(--slate); font-size: 16.5px; }
.about-tags { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.about-tags li { font-size: 13px; font-weight: 500; padding: 7px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }

/* ---------- Principle ---------- */
.principle { background: var(--stone); padding: clamp(70px, 9vw, 110px) 0; }
.principle blockquote { margin: 0 auto; max-width: 860px; text-align: center; }
.principle p { font-family: var(--serif); font-size: clamp(26px, 3.4vw, 40px); line-height: 1.3; letter-spacing: -.01em; margin: 0 0 22px; }
.principle cite { font-style: normal; font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 8vw, 100px); }
.faq-list { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 24px 44px 24px 0; position: relative;
  font-size: 17px; font-weight: 500;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-size: 22px; font-weight: 400; color: var(--champagne);
  transition: transform .3s var(--ease);
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--slate); padding-right: 44px; padding-bottom: 10px; }
.faq .section-lede a { color: var(--charcoal); }

/* ---------- Contact ---------- */
.contact { background: var(--charcoal); color: var(--ivory); text-align: center; }
.contact .eyebrow { color: var(--champagne-light); }
.contact .eyebrow::before { display: none; }
.contact-title { font-size: clamp(38px, 5.4vw, 64px); margin-bottom: 22px; }
.contact-lede { max-width: 560px; margin: 0 auto 38px; color: rgba(246, 244, 240, .7); font-size: 17px; }
.contact-actions { display: flex; justify-content: center; }
.contact-details {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 16px;
  margin-top: 48px; padding-top: 40px; border-top: 1px solid rgba(246, 244, 240, .12);
  max-width: 640px; margin-inline: auto;
}
.contact-details a {
  flex: 1 1 240px;
  text-decoration: none; text-align: left;
  border: 1px solid rgba(246, 244, 240, .16); border-radius: 6px;
  padding: 18px 22px; font-size: 16px; font-weight: 500;
  transition: border-color .3s, background .3s;
}
.contact-details { max-width: 820px; }
.contact-details a { overflow-wrap: anywhere; }
.contact-details a[href^="mailto:"] { flex: 2 1 420px; font-size: clamp(13px, 3.4vw, 16px); }
.contact-details a:hover { border-color: var(--champagne); background: rgba(246, 244, 240, .04); }
.contact-details span { display: block; font-size: 11px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--champagne-light); margin-bottom: 4px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--charcoal); color: rgba(246, 244, 240, .6); border-top: 1px solid rgba(246, 244, 240, .1); padding: 36px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.brand-footer .brand-mark { background: var(--charcoal-2); border: 1px solid rgba(246, 244, 240, .14); }
.brand-footer .brand-name { color: var(--ivory); font-size: 19px; }
.brand-footer .brand-sub { color: rgba(246, 244, 240, .5); }
.footer-tag { font-family: var(--serif); font-size: 17px; margin: 0; }
.footer-copy { font-size: 13px; margin: 0; }

/* ---------- Inner pages ---------- */
.facts-4 { grid-template-columns: repeat(2, 1fr); gap: 22px 24px; margin-top: 30px; }
.about-copy > p.about-areas-label { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 30px 0 0; }
.about-areas-label + .about-tags { margin-top: 12px; }
.page-first .about-grid { align-items: start; }
.page-first .portrait { margin-top: 4px; position: sticky; top: 112px; }
@media (max-width: 860px) { .page-first .portrait { position: relative; top: 0; margin-top: 0; } }
.text-link { color: var(--charcoal); text-decoration-color: var(--champagne); text-underline-offset: 3px; }
.page-hero { padding: clamp(140px, 16vw, 190px) 0 clamp(56px, 7vw, 88px); border-bottom: 1px solid var(--line); }
.page-title { font-size: clamp(40px, 5.6vw, 68px); max-width: 900px; margin-bottom: 22px; }
.page-lede { max-width: 620px; font-size: clamp(17px, 1.5vw, 19px); color: var(--slate); margin: 0; }
.page-first { padding-top: clamp(140px, 16vw, 190px); }
.section-more { margin: 40px 0 0; }
.nav-links a[aria-current="page"] { color: var(--charcoal); box-shadow: inset 0 -2px 0 var(--champagne); padding-bottom: 4px; }

/* ---------- Reveal animation ---------- */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-panel { max-width: 480px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 44px 32px; }
  .work-item { grid-template-columns: 1fr 1fr; }
  .work-meta { grid-column: 1 / -1; padding-top: 0; }
  .work-item h3 { grid-column: 1; }
  .work-item p { grid-column: 2; grid-row: 2; }
  .flow { grid-column: 1 / -1; }
  .security-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .container { width: min(var(--container), 100% - 32px); }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 0; background: var(--ivory);
    flex-direction: column; justify-content: center; gap: 26px;
    opacity: 0; visibility: hidden; transition: opacity .35s var(--ease), visibility .35s;
  }
  .nav-links.open { opacity: 1; visibility: visible; }
  .nav-links a:not(.btn) { font-family: var(--serif); font-size: 30px; font-weight: 400; color: var(--charcoal); }
  .nav-links .btn-small { margin-top: 10px; padding: 14px 26px; font-size: 14px; }

  .intro-grid, .about-grid, .faq-grid { grid-template-columns: 1fr; }
  .portrait { max-width: 300px; margin-left: 14px; justify-self: start; }
  .work-item { grid-template-columns: 1fr; padding: 34px 0; }
  .work-item h3, .work-item p, .flow { grid-column: 1; grid-row: auto; }
  .flow i { width: 14px; }
  .audience-cols { grid-template-columns: 1fr; }
  .audience-cols > div, .audience-cols > div + div { padding: 26px 0 6px; border-left: 0; }
  .audience-cols > div + div { border-top: 1px solid var(--line); }
}

@media (max-width: 560px) {
  .service-grid, .process-steps, .security-list { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; gap: 16px; }
  .hero-panel { padding: 20px; }
  .tools-inner { gap: 14px; }
  .tools-list { gap: 6px 20px; font-size: 14px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}