/* Home page sections: hero, services, process loop, engagement models, FAQ, contact */

/* Hero */
.hero { position: relative; padding-block: clamp(48px, 8vw, 96px) clamp(64px, 9vw, 120px); }
.hero::before { /* blueprint grid fading out to the left */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 85% 30%, #000 0%, transparent 60%);
  opacity: .7;
}
.hero-grid { display: grid; gap: 48px; align-items: center; }
.hero h1 { margin: 20px 0 24px; }
.hero .lead { margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 40px; padding-top: 20px; border-top: 1px dashed var(--line); }
.hero-art { width: 100%; max-width: 480px; justify-self: center; }
.hero-art .trend { stroke-dasharray: 700; stroke-dashoffset: 700; animation: draw 2s .3s var(--ease) forwards; }
.hero-art .area { opacity: 0; animation: fade 1.2s 1.2s var(--ease) forwards; }
.hero-art .node { opacity: 0; animation: pop .5s var(--ease) forwards; }
.hero-art .n1 { animation-delay: .9s; } .hero-art .n2 { animation-delay: 1.4s; } .hero-art .n3 { animation-delay: 1.9s; } .hero-art .n4 { animation-delay: 2.3s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (min-width: 960px) { .hero-grid { grid-template-columns: 1.15fr .85fr; } .hero-art { justify-self: end; } }

/* Problem strip */
.symptoms { border-block: 1px solid var(--line); background: var(--paper-2); }
.symptoms ul { list-style: none; margin: 0; padding: 28px 0; display: grid; gap: 14px 40px; }
.symptoms li { display: flex; gap: 12px; color: var(--ink-2); font-size: var(--fs-sm); }
.symptoms li::before { content: "—"; font-family: var(--font-body); color: var(--accent); }
@media (min-width: 760px) { .symptoms ul { grid-template-columns: repeat(2, 1fr); } }

/* Services: numbered zig-zag rows */
.service { display: grid; gap: 20px; align-items: start; padding-block: 40px; border-top: 1px solid var(--line); }
.service:last-of-type { border-bottom: 1px solid var(--line); }
.service-num { font: var(--w-strong) 2.6rem/1 var(--font-display); letter-spacing: -.02em; color: var(--accent); }
.service h3 { margin-bottom: 12px; }
.service p { color: var(--ink-2); max-width: 58ch; }
.service ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; align-content: start; }
.service-list { padding-top: 2px; }
.service li { padding-left: 22px; position: relative; color: var(--ink-2); font-size: var(--fs-sm); }
/* dash sits on the optical middle of the first line (line-height 1.65 → .825em) */
.service li::before { content: ""; position: absolute; left: 0; top: calc(.825em - .75px); width: 10px; height: 1.5px; background: var(--accent); }
.service .example { margin-top: 16px; padding: 14px 16px; background: var(--accent-soft); border-left: 3px solid var(--accent); font-size: var(--fs-sm); color: var(--ink-2); }
@media (min-width: 900px) {
  .service { grid-template-columns: 120px 1fr 1fr; gap: 40px; }
  .service:nth-of-type(even) .service-body { order: 3; }
  .service:nth-of-type(even) .service-list { order: 2; }
}

/* Process loop (dark band) */
.process { background: var(--night); color: var(--night-ink); }
.process .label { color: var(--night-ink-2); }
.process .lead { color: var(--night-ink-2); }
.steps { margin: 0 0 32px; display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; position: relative; }
.steps::-webkit-scrollbar { display: none; }
.step-tab {
  flex: 1 0 auto; min-width: 128px; text-align: left; cursor: pointer;
  background: transparent; color: var(--night-ink-2);
  border: 0; border-top: 2px solid var(--night-2); padding: 14px 10px 10px 0;
  font: var(--w-strong) var(--fs-sm)/1.3 var(--font-body);
  transition: color .25s, border-color .25s;
}
.step-tab small { display: block; font: var(--w-strong) var(--fs-xs)/1 var(--font-body); margin-bottom: 8px; }
.step-tab:hover { color: var(--night-ink); }
.step-tab[aria-selected="true"] { color: var(--night-ink); border-top-color: var(--accent-2); }
.step-panel { display: grid; gap: 28px; padding: clamp(24px, 4vw, 44px); background: var(--night-2); border-radius: 2px; border-left: 4px solid var(--accent-2); }
.step-panel h3 { font-size: var(--fs-h3-lg); margin: 8px 0 14px; }
.step-panel p:not(.label) { color: var(--night-ink-2); }
.step-panel dl { margin: 0; display: grid; gap: 18px; }
.step-panel dt { font: var(--w-strong) var(--fs-xs)/1 var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 6px; }
.step-panel dd { margin: 0; color: var(--night-ink); font-size: var(--fs-sm); }
.step-panel[hidden] { display: none; }
.js .step-panel:not([hidden]) { animation: pop .4s var(--ease); }
.no-js .step-panel { margin-bottom: 12px; }
.loop-note { display: flex; gap: 12px; align-items: center; margin-top: 24px; color: var(--night-ink-2); font-size: var(--fs-sm); }
.loop-note svg { width: 28px; height: 28px; color: var(--accent-2); flex: none; }
@media (min-width: 860px) { .step-panel { grid-template-columns: 1.2fr 1fr; } }

/* Engagement models */
.models { display: grid; gap: 0; border: 1px solid var(--line); border-radius: 2px; overflow: hidden; }
.model { padding: 32px 28px; background: var(--paper); display: grid; gap: 10px; align-content: start; }
.model + .model { border-top: 1px solid var(--line); }
.model.featured { background: var(--ink); color: #fff; }
.model.featured .label, .model.featured p:not(.label):not(.duration) { color: var(--night-ink-2); }
.model h3 { font-size: var(--fs-h3); }
.model p { margin: 0; }
.model p:not(.label):not(.duration) { color: var(--ink-2); font-size: var(--fs-sm); }
.model .duration { font: var(--w-strong) 1.6rem/1 var(--font-display); letter-spacing: -.02em; }
.pricing-note { margin-top: 20px; color: var(--ink-3); font-size: var(--fs-sm); }
@media (min-width: 900px) {
  .models { grid-template-columns: 1fr 1.25fr 1fr; }
  .model + .model { border-top: 0; border-left: 1px solid var(--line); }
}

/* FAQ */
.faq-grid { display: grid; gap: 40px; }
.faq details { border-top: 1px solid var(--line); padding-block: 20px; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 20px; font: var(--w-strong) var(--fs-base)/1.4 var(--font-body); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.4rem/1 var(--font-body); color: var(--accent); transition: transform .25s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 14px 0 0; color: var(--ink-2); max-width: 64ch; }
@media (min-width: 900px) { .faq-grid { grid-template-columns: .8fr 1.2fr; } }

/* Contact */
.contact { background: var(--accent); color: #fff; }
.contact .label { color: #fff; }
.contact-grid { display: grid; gap: 32px; align-items: end; }
.contact h2 { color: #fff; max-width: 20ch; }
.contact p:not(.label) { color: #e3e9ff; max-width: 52ch; }
.contact .btn-primary { background: #fff; color: var(--ink); border-color: #fff; }
.contact .btn-primary:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.contact .contact-mail { font: var(--w-strong) var(--fs-sm)/1 var(--font-body); color: #fff; }
@media (min-width: 900px) { .contact-grid { grid-template-columns: 1.3fr 1fr; } }

/* Scroll reveal: only hide when JS is present, so content never stays invisible */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* Polish: hint that the step strip scrolls on narrow screens */
@media (max-width: 1023px) { .steps { mask-image: linear-gradient(90deg, #000 85%, transparent); } }
.faq-grid { align-items: start; }

/* Animated hero parts start hidden; show them fully when animations are disabled */
@media (prefers-reduced-motion: reduce) {
  .hero-art .trend { stroke-dashoffset: 0; }
  .hero-art .area, .hero-art .node { opacity: 1; }
}
@media print {
  .js .reveal { opacity: 1; transform: none; }
  .step-panel[hidden] { display: grid; }
  .steps { display: none; }
}
/* Without JS all panels are shown in sequence, so the tab strip is meaningless */
.no-js .steps { display: none; }
.js:not(.tabs-ready) .step-panel:not(#step-1) { display: none; }