/* Portfolio foundation: base, layout, components, pages and responsive rules. */
:root {
  color-scheme: dark;
  --color-bg: #07111f;
  --color-surface: #0d1a2b;
  --color-surface-raised: #13253b;
  --color-text: #edf7ff;
  --color-text-muted: #a9bdce;
  --color-accent: #42d9ff;
  --color-on-accent: #06131e;
  --color-accent-secondary: #ff9f43;
  --color-border: rgb(151 206 232 / 20%);
  --color-focus: #ffd166;
  --shadow-glow: 0 0 42px rgb(66 217 255 / 16%);
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "PT Serif", Georgia, serif;
  --container: 1120px;
  --header-height: 76px;
  --space-1: .5rem;
  --space-2: .75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --radius-control: .65rem;
  --radius-field: .55rem;
  --radius-card: 1rem;
  --radius-panel: .75rem;
  --radius-pill: 999px;
  --shadow-surface: 0 18px 50px rgb(0 0 0 / 28%);
  --shadow-elevated: 0 18px 50px rgb(0 0 0 / 28%);
  --color-ambient-glow: rgb(66 217 255 / 11%);
  --color-whatsapp: #168d5a;
  --color-whatsapp-border: #42c98c;
  --mechanical-line: color-mix(in srgb, var(--color-accent) 66%, transparent);
  --mechanical-line-muted: color-mix(in srgb, var(--color-accent) 28%, transparent);
  --mechanical-marker: var(--color-accent);
  --mechanical-connector: color-mix(in srgb, var(--color-accent) 84%, var(--color-surface));
  --mechanical-panel: color-mix(in srgb, var(--color-surface-raised) 74%, transparent);
}

:root[data-theme="light"] {
  color-scheme: light;
  --color-bg: #eff8fc;
  --color-surface: #ffffff;
  --color-surface-raised: #e1f0f7;
  --color-text: #0a1a2a;
  --color-text-muted: #466174;
  --color-accent: #007395;
  --color-on-accent: #ffffff;
  --color-accent-secondary: #b95a00;
  --color-border: rgb(12 77 106 / 20%);
  --color-focus: #7a3e00;
  --shadow-glow: 0 0 38px rgb(0 125 168 / 14%);
  --shadow-surface: 0 18px 50px rgb(21 48 67 / 12%);
  --shadow-elevated: 0 18px 50px rgb(21 48 67 / 12%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 0;
  margin: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font: 400 1rem/1.65 var(--font-body);
}
body::before {
  content: "";
  position: fixed;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(circle at 18% 10%, var(--color-ambient-glow), transparent 28rem);
  pointer-events: none;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.icon { display: block; width: 1em; height: 1em; flex: none; fill: currentColor; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 4px; }

.skip-link { position: absolute; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--color-focus); color: #09111a; font-family: var(--font-display); font-weight: 700; }
.skip-link:focus { top: 1rem; }
/* Shared header/navigation: menu state and current-route styling across ES/EN pages. */
.site-header { position: sticky; top: 0; z-index: 30; height: var(--header-height); border-bottom: 1px solid var(--color-border); background: color-mix(in srgb, var(--color-bg) 88%, transparent); backdrop-filter: blur(18px); }
.site-nav, .page-shell { width: min(var(--container), calc(100% - 2rem)); margin-inline: auto; }
.site-nav { height: 100%; display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: clamp(.65rem, 2vw, 1rem); }
.brand { display: inline-flex; min-width: 0; flex: 0 1 auto; align-items: center; gap: .55rem; color: var(--color-text); font: 700 1.05rem/1 var(--font-display); letter-spacing: .03em; white-space: nowrap; }
.brand__mark { display: grid; width: 2.25rem; aspect-ratio: 1; place-items: center; border: 1px solid var(--color-accent); border-radius: 50%; color: var(--color-accent); box-shadow: var(--shadow-glow); }
.nav-actions { display: flex; flex: 0 0 auto; align-items: center; gap: .6rem; }
.theme-toggle, .menu-toggle { display: inline-grid; width: 2.75rem; height: 2.75rem; place-items: center; border: 1px solid var(--color-border); border-radius: var(--radius-panel); background: var(--color-surface); color: var(--color-text); }
.theme-toggle__icon { color: var(--color-accent); font-size: 1.2rem; }
.menu-toggle { font-size: 1.3rem; }
.site-menu { position: fixed; z-index: 25; top: var(--header-height); right: 0; left: 0; display: none; max-height: calc(100dvh - var(--header-height)); overflow: auto; padding: var(--space-4) var(--space-3) var(--space-5); border-bottom: 1px solid var(--color-border); background: var(--color-surface); box-shadow: var(--shadow-elevated); }
.site-menu[data-open="true"] { display: block; }
.site-menu__list { display: grid; gap: .45rem; max-width: var(--container); margin: 0 auto; padding: 0; list-style: none; }
.site-menu__link { display: block; padding: .85rem var(--space-3); border-radius: var(--radius-control); color: var(--color-text-muted); font-family: var(--font-display); font-weight: 600; }
.site-menu__link:hover, .site-menu__link[aria-current="page"] { color: var(--color-text); background: color-mix(in srgb, var(--color-accent) 12%, transparent); }
.site-menu__link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--color-accent); }
.site-menu__language { display: inline-flex; align-items: center; margin: var(--space-3) auto 0; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-pill); color: var(--color-accent); font: 700 .85rem/1 var(--font-display); letter-spacing: .08em; }
.no-js .theme-toggle { display: none; }

/* Navigation fallback depends on controller readiness, not merely html.js:
   links remain in document flow until the header owns collapsible interaction. */
@media (max-width: 899px) {
  .site-header:not([data-enhanced="true"]) { height: auto; }
  .site-header:not([data-enhanced="true"]) .site-nav { min-height: var(--header-height); flex-wrap: wrap; padding-block: var(--space-2); }
  .site-header:not([data-enhanced="true"]) .nav-actions { display: none; }
  .site-header:not([data-enhanced="true"]) .site-menu { position: static; display: block; flex: 1 0 100%; min-width: 0; max-height: none; overflow: visible; padding: var(--space-2) 0 0; border: 0; background: transparent; box-shadow: none; }
  .site-header:not([data-enhanced="true"]) .site-menu__list { grid-template-columns: repeat(auto-fit, minmax(min(100%, 8rem), 1fr)); gap: .35rem; }
  .site-header:not([data-enhanced="true"]) .site-menu__link { padding: .7rem var(--space-2); }
  .site-header:not([data-enhanced="true"]) .site-menu__language { margin: var(--space-2) 0 0; }
}

.page-main { min-height: calc(100vh - var(--header-height)); }
.hero { position: relative; isolation: isolate; display: grid; align-items: center; min-height: calc(100svh - var(--header-height)); padding: 3.5rem 0 4rem; overflow: clip; }
.hero::after { content: ""; position: absolute; z-index: -1; inset: 15% 0 auto; height: 1px; background: linear-gradient(90deg, transparent, var(--color-border), transparent); }
.hero__grid { display: grid; align-items: center; gap: 2.5rem; }
.eyebrow { display: inline-flex; align-items: center; gap: .55rem; margin: 0 0 1rem; color: var(--color-accent); font: 700 .78rem/1.2 var(--font-display); letter-spacing: .13em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 1.8rem; height: 1px; background: currentColor; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); line-height: 1.08; }
.hero__title { max-width: 10ch; font-size: clamp(2.85rem, 9vw, 6.8rem); letter-spacing: -.07em; }
.hero__title span { color: var(--color-accent); }
.hero__lead { max-width: 56ch; margin: 1.5rem 0; color: var(--color-text-muted); font-size: clamp(1.05rem, 2vw, 1.2rem); }
.hero__meta { margin: 0 0 1.5rem; color: var(--color-text-muted); font-family: var(--font-display); font-size: .9rem; }
.button-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-control); background: var(--color-surface); color: var(--color-text); font: 700 .88rem/1 var(--font-display); letter-spacing: .02em; transition: transform .2s ease, border-color .2s ease, background-color .2s ease; }
.button:hover { transform: translateY(-2px); border-color: var(--color-accent); }
.button--primary { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-on-accent); box-shadow: 0 0 28px rgb(66 217 255 / 23%); }
.button--secondary { background: transparent; }
.hero__links { display: flex; align-items: center; flex-wrap: wrap; gap: .9rem; margin-top: 1.4rem; }
.social-link { display: inline-grid; width: 2.6rem; aspect-ratio: 1; place-items: center; border: 1px solid var(--color-border); border-radius: 50%; color: var(--color-text-muted); transition: color .2s ease, border-color .2s ease, transform .2s ease; }
.social-link:hover { transform: translateY(-2px); border-color: var(--color-accent); color: var(--color-accent); }

.hero-visual { position: relative; width: min(100%, 30rem); min-height: 26rem; margin-inline: auto; display: grid; place-items: center; pointer-events: none; isolation: isolate; }
.hero-visual::before { content: ""; position: absolute; width: 68%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgb(66 217 255 / 20%), transparent 68%); filter: blur(12px); }
.hero-instrument { position: absolute; z-index: 0; width: min(112%, 34rem); height: auto; color: var(--mechanical-line); opacity: .72; pointer-events: none; }
.hero-instrument use { stroke: currentColor; }
.hero-visual__photo { position: relative; z-index: 2; width: min(68%, 19rem); -webkit-mask-image: linear-gradient(to bottom, #000 0 85%, transparent 100%); mask-image: linear-gradient(to bottom, #000 0 85%, transparent 100%); }
.hero__scroll { position: absolute; bottom: 1.3rem; left: 50%; color: var(--color-text-muted); font: 700 .72rem/1 var(--font-display); letter-spacing: .12em; text-transform: uppercase; transform: translateX(-50%); }

.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section--surface { background: color-mix(in srgb, var(--color-surface) 82%, transparent); border-block: 1px solid var(--color-border); }
.section__heading { display: grid; gap: 1rem; max-width: 44rem; margin-bottom: 2.5rem; }
.section__title { font-size: clamp(2rem, 5vw, 3.8rem); letter-spacing: -.05em; }
.section__intro { margin: 0; color: var(--color-text-muted); }
.card-grid { display: grid; gap: var(--space-3); }
.card { min-width: 0; padding: 1.35rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-surface); }
.card__label { margin: 0 0 .8rem; color: var(--color-accent); font: 700 .76rem/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; }
.card h3 { font-size: 1.4rem; }
.card p { margin: .8rem 0 0; color: var(--color-text-muted); }
.text-link { color: var(--color-accent); font: 700 .88rem/1 var(--font-display); text-decoration: underline; text-underline-offset: .3rem; }
.project-tags { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.tag { max-width: 100%; overflow-wrap: anywhere; }
.tag--status { border: 1px solid var(--color-border); border-radius: var(--radius-pill); color: var(--color-text); }
.tag--technology, .tag--category { border: 1px solid var(--color-border); border-radius: var(--radius-pill); }
.project-tags li { padding: .35rem .55rem; color: var(--color-text-muted); font: 600 .75rem/1 var(--font-display); }
.case-study { overflow: clip; }
.case-hero { padding: clamp(4.5rem, 11vw, 9rem) 0 clamp(3rem, 7vw, 5rem); border-bottom: 1px solid var(--color-border); background: linear-gradient(135deg, color-mix(in srgb, var(--color-surface) 78%, transparent), transparent 72%); }
.case-hero h1 { max-width: 13ch; margin: .85rem 0 0; font-size: clamp(3rem, 8vw, 6.2rem); letter-spacing: -.07em; }
.case-status { display: inline-flex; margin: 0; padding: .4rem .65rem; font: 700 .76rem/1 var(--font-display); letter-spacing: .05em; text-transform: uppercase; }
.case-hero__lead { max-width: 62ch; margin: 1.5rem 0 0; color: var(--color-text-muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.case-hero__tags { margin-bottom: 1.5rem; }
.case-nav { display: flex; gap: .35rem; overflow-x: auto; padding-block: 1rem; border-bottom: 1px solid var(--color-border); }
.case-nav a { flex: 0 0 auto; padding: .5rem .7rem; border-radius: .5rem; color: var(--color-text-muted); font: 700 .78rem/1 var(--font-display); }
.case-nav a:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-accent) 12%, transparent); }
.case-section h2 { max-width: 16ch; font-size: clamp(2rem, 5vw, 3.8rem); letter-spacing: -.05em; }
.case-layout { display: grid; gap: 2rem; }
.case-copy { max-width: 63ch; }
.case-copy p { margin: 0; color: var(--color-text-muted); }
.case-copy p + p { margin-top: 1rem; }
.case-problem-grid, .case-decision-grid, .case-compare { display: grid; gap: 1rem; }
.case-problem-grid .card, .case-decision-grid .card { min-height: 100%; }
.case-problem-grid h3, .case-decision-grid h3 { font-size: 1.25rem; }
.case-phase-list { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; counter-reset: case-phase; }
.case-phase-list li { position: relative; padding: 1.25rem 1.25rem 1.25rem 4.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-surface); counter-increment: case-phase; }
.case-phase-list li::before { position: absolute; top: 1.15rem; left: 1.25rem; content: "0" counter(case-phase); color: var(--color-accent); font: 700 1.05rem/1 var(--font-display); }
.case-phase-list h3 { font-size: 1.3rem; }
.case-phase-list p { margin: .5rem 0 0; color: var(--color-text-muted); }
.case-routes { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-top: 1.5rem; padding: 1rem; border: 1px solid var(--color-border); border-radius: .75rem; background: var(--color-bg); color: var(--color-accent); overflow-wrap: anywhere; }
.case-study code { padding: .12rem .32rem; border-radius: .25rem; background: color-mix(in srgb, var(--color-accent) 10%, transparent); color: var(--color-text); font: 600 .88em/1.3 ui-monospace, SFMono-Regular, Consolas, monospace; }
.case-routes code { white-space: nowrap; }
.case-study--engineering .case-problem-grid--inspection .card, .case-study--engineering .case-decision-grid--assembly .card { position: relative; border-color: color-mix(in srgb, var(--mechanical-line-muted) 62%, var(--color-border)); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.case-study--engineering .case-problem-grid--inspection .card::before, .case-study--engineering .case-decision-grid--assembly .card::before { content: ""; position: absolute; top: .72rem; right: .72rem; width: .68rem; height: .68rem; border-top: 1px solid var(--mechanical-line-muted); border-right: 1px solid var(--mechanical-line-muted); pointer-events: none; }
.case-study--engineering .case-problem-grid--inspection .card::after, .case-study--engineering .case-decision-grid--assembly .card::after { content: ""; position: absolute; right: .76rem; bottom: .76rem; width: .4rem; height: .4rem; border: 1px solid var(--mechanical-connector); border-radius: 50%; pointer-events: none; }
.case-study--engineering .case-problem-grid--inspection .card:hover, .case-study--engineering .case-problem-grid--inspection .card:focus-within, .case-study--engineering .case-decision-grid--assembly .card:hover, .case-study--engineering .case-decision-grid--assembly .card:focus-within { transform: translateY(-2px); border-color: var(--mechanical-line); box-shadow: var(--shadow-elevated); }
.case-study--engineering .case-problem-grid--inspection .card:hover::before, .case-study--engineering .case-problem-grid--inspection .card:focus-within::before, .case-study--engineering .case-decision-grid--assembly .card:hover::before, .case-study--engineering .case-decision-grid--assembly .card:focus-within::before { border-color: var(--mechanical-marker); }
.case-study--engineering .case-phase-list--flow { position: relative; }
.case-study--engineering .case-phase-list--flow::before { content: ""; position: absolute; z-index: 0; top: 2rem; bottom: 2rem; left: 1.55rem; width: 1px; background: var(--mechanical-line-muted); pointer-events: none; }
.case-study--engineering .case-phase-list--flow li { border-color: color-mix(in srgb, var(--mechanical-line-muted) 54%, var(--color-border)); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.case-study--engineering .case-phase-list--flow li::after { content: ""; position: absolute; z-index: 1; top: 1.53rem; left: 1.38rem; width: .34rem; height: .34rem; border: 1px solid var(--mechanical-marker); border-radius: 50%; background: var(--color-surface); box-shadow: 0 0 .4rem color-mix(in srgb, var(--mechanical-marker) 30%, transparent); pointer-events: none; }
.case-study--engineering .case-phase-list--flow li:hover, .case-study--engineering .case-phase-list--flow li:focus-within { transform: translateX(.15rem); border-color: var(--mechanical-line); box-shadow: var(--shadow-elevated); }
.case-study--engineering .case-phase-list--flow li:hover::after, .case-study--engineering .case-phase-list--flow li:focus-within::after { background: var(--mechanical-marker); }
.case-study--engineering .case-section--evolution .section__heading { margin-bottom: 2.5rem; }
.case-study--engineering .case-architecture { display: grid; gap: 1rem; margin-top: 1.5rem; padding: clamp(1rem, 3vw, 1.5rem); border: 1px solid color-mix(in srgb, var(--mechanical-line-muted) 72%, var(--color-border)); border-radius: var(--radius-panel); background: var(--mechanical-panel); }
.case-study--engineering .case-architecture__state { display: grid; gap: .8rem; min-width: 0; }
.case-study--engineering .case-architecture__label { margin: 0; color: var(--color-accent); font: 700 .74rem/1.2 var(--font-display); letter-spacing: .1em; text-transform: uppercase; }
.case-study--engineering .case-architecture__node, .case-study--engineering .case-architecture__locale { display: grid; gap: .45rem; padding: .85rem; border: 1px solid var(--mechanical-line-muted); border-radius: var(--radius-control); background: var(--color-surface); color: var(--color-text-muted); }
.case-study--engineering .case-architecture__node--core { border-color: var(--mechanical-line); }
.case-study--engineering .case-architecture__routes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; margin: 0; padding: 0; list-style: none; }
.case-study--engineering .case-architecture__routes li { min-width: 0; padding: .6rem; border-left: 1px solid var(--mechanical-line-muted); background: color-mix(in srgb, var(--color-surface) 76%, transparent); }
.case-study--engineering .case-architecture__connector { justify-self: center; width: 1px; height: 1.5rem; background: linear-gradient(var(--mechanical-line), var(--mechanical-line)) center / 1px 100% no-repeat, radial-gradient(circle at 50% 0, var(--mechanical-marker) 0 .15rem, transparent .17rem), radial-gradient(circle at 50% 100%, var(--mechanical-marker) 0 .15rem, transparent .17rem); pointer-events: none; }
.case-study--engineering .case-section--outcome .case-layout { position: relative; }
.case-study--engineering .case-section--outcome .case-layout::before { content: ""; position: absolute; top: .2rem; bottom: .2rem; left: -1rem; width: 1px; background: var(--mechanical-line-muted); pointer-events: none; }
.case-list { max-width: 60ch; }
.case-closing { display: grid; gap: 1.2rem; max-width: 50rem; }
.case-closing h2 { font-size: clamp(2rem, 5vw, 4rem); letter-spacing: -.05em; }
.page-hero { padding: clamp(4rem, 10vw, 8rem) 0 3rem; }
.page-hero__title { max-width: 13ch; font-size: clamp(2.8rem, 8vw, 5.5rem); letter-spacing: -.06em; }
.page-hero__lead { max-width: 58ch; margin: 1.3rem 0 0; color: var(--color-text-muted); font-size: 1.1rem; }
.content-stack { display: grid; gap: 1rem; }
.list { display: grid; gap: .75rem; margin: 1rem 0 0; padding: 0; list-style: none; color: var(--color-text-muted); }
.list li { padding-left: 1.1rem; position: relative; }
.list li::before { content: ""; position: absolute; left: 0; top: .68em; width: .38rem; height: .38rem; border-radius: 50%; background: var(--color-accent); }
.contact-page__stack { display: grid; gap: 1.5rem; }
.contact-page__conversation-grid, .contact-page__channel-grid { display: grid; gap: 1rem; }
.contact-page__conversation, .contact-channel { display: grid; align-content: start; gap: .85rem; min-height: 100%; padding: 1.25rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-surface); }
.contact-page__conversation h3, .contact-channel h3 { margin: 0; font-size: 1.25rem; overflow-wrap: anywhere; }
.contact-page__conversation > p:not(.contact-page__number), .contact-channel > p:not(.contact-channel__type) { margin: 0; color: var(--color-text-muted); }
.contact-page__number, .contact-channel__type { margin: 0; color: var(--color-accent); font: 700 .76rem/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; }
.contact-channel .button { justify-self: start; margin-top: auto; }
.contact-channel--location { background: linear-gradient(135deg, color-mix(in srgb, var(--color-accent) 10%, var(--color-surface)), var(--color-surface)); }
.contact-page__form-layout { display: grid; gap: 2rem; align-items: start; }
.contact-page__form-intro { max-width: 38rem; }
.contact-page__form-intro h2, .contact-page__closing h2 { max-width: 17ch; font-size: clamp(2rem, 5vw, 3.8rem); letter-spacing: -.05em; }
.contact-page__form-intro > p, .contact-page__closing > p { color: var(--color-text-muted); }
.contact-form { display: grid; gap: var(--space-3); padding: clamp(1.25rem, 4vw, 2rem); border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-surface); }
.contact-form h2 { margin: 0; font-size: clamp(1.5rem, 3vw, 2rem); }
.contact-form__notice, .contact-form__noscript { margin: 0; padding: .85rem; border-left: 3px solid var(--color-accent-secondary); background: color-mix(in srgb, var(--color-accent-secondary) 10%, transparent); color: var(--color-text-muted); }
.contact-form__fields { display: grid; gap: 1rem; }
.field span { color: var(--color-text-muted); font-weight: 500; }
.field input, .field textarea, .field select { min-height: 2.9rem; }
.field input, .field textarea, .field select { width: 100%; padding: var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-field); background: var(--color-bg); color: var(--color-text); }
.field select { font: inherit; }
.field input:focus-visible, .field textarea:focus-visible, .field select:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.contact-form__status { min-height: 1.5em; margin: 0; color: var(--color-text-muted); }
.contact-page__closing { display: grid; gap: 1.2rem; max-width: 55rem; }
.field { display: grid; gap: .4rem; color: var(--color-text-muted); font-family: var(--font-display); font-size: .86rem; font-weight: 600; }
.field textarea { min-height: 9rem; resize: vertical; }

/* Engineering Notes: documentary reading surfaces and reusable entry metadata. */
.notes-page { overflow: clip; }
.notes-hero .page-hero__title { max-width: 15ch; }
.note-list { display: grid; gap: var(--space-4); max-width: 72rem; }
.note-entry { display: grid; gap: var(--space-3); padding: clamp(1.25rem, 4vw, 2rem); border: 1px solid color-mix(in srgb, var(--mechanical-line-muted) 66%, var(--color-border)); border-radius: var(--radius-panel); background: var(--mechanical-panel); }
.note-entry__type, .note-header__type { margin: 0; color: var(--color-accent); font: 700 .76rem/1.2 var(--font-display); letter-spacing: .11em; text-transform: uppercase; }
.note-entry h3 { max-width: 28ch; margin: 0; font-size: clamp(1.5rem, 3vw, 2.35rem); letter-spacing: -.04em; }
.note-entry h3 a:hover { color: var(--color-accent); }
.note-entry > p:not(.note-entry__type) { max-width: 66ch; margin: 0; color: var(--color-text-muted); }
.note-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0; list-style: none; }
.note-tags li { padding: .38rem .58rem; border: 1px solid var(--mechanical-line-muted); border-radius: var(--radius-pill); color: var(--color-text-muted); font: 600 .75rem/1 var(--font-display); letter-spacing: .04em; }
.note-article { padding: clamp(3.5rem, 8vw, 6rem) 0 var(--space-7); }
.note-header { display: grid; gap: var(--space-3); padding-bottom: clamp(2rem, 5vw, 4rem); border-bottom: 1px solid var(--mechanical-line-muted); }
.note-breadcrumb { display: flex; flex-wrap: wrap; gap: .55rem; color: var(--color-text-muted); font: 600 .88rem/1.5 var(--font-display); }
.note-breadcrumb a { color: var(--color-accent); }
.note-breadcrumb span[aria-current="page"] { min-width: 0; overflow-wrap: anywhere; }
.note-header h1 { max-width: 17ch; margin: 0; font-size: clamp(2.65rem, 7vw, 5.5rem); letter-spacing: -.06em; line-height: .98; }
.note-header__summary { max-width: 65ch; margin: 0; color: var(--color-text-muted); font-size: clamp(1.05rem, 2vw, 1.22rem); }
.note-content { display: grid; gap: clamp(2.5rem, 6vw, 4.5rem); max-width: 74ch; padding-top: clamp(2.5rem, 6vw, 5rem); }
.note-content section { display: grid; gap: var(--space-3); }
.note-content h2, .note-related h2 { max-width: 24ch; margin: 0; font-size: clamp(1.7rem, 4vw, 2.8rem); letter-spacing: -.045em; line-height: 1.06; }
.note-content h3 { margin: 0; font-size: 1.1rem; font-family: var(--font-display); }
.note-content p { margin: 0; color: var(--color-text-muted); }
.note-content code { padding: .12rem .32rem; border-radius: .25rem; background: color-mix(in srgb, var(--color-accent) 10%, transparent); color: var(--color-text); font: 600 .88em/1.3 ui-monospace, SFMono-Regular, Consolas, monospace; }
.note-diagram { width: min(100%, 72rem); padding: clamp(1rem, 3vw, 1.5rem); border: 1px solid color-mix(in srgb, var(--mechanical-line-muted) 74%, var(--color-border)); border-radius: var(--radius-panel); background: var(--mechanical-panel); }
.note-diagram__grid { display: grid; gap: var(--space-3); }
.note-diagram pre { margin: 0; padding: var(--space-3); overflow: auto; border-left: 1px solid var(--mechanical-line); background: color-mix(in srgb, var(--color-surface) 82%, transparent); color: var(--color-text); font: 500 .88rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace; }
.note-diagram pre code { padding: 0; background: transparent; color: inherit; font: inherit; }
.note-related { display: grid; gap: var(--space-3); max-width: 74ch; margin-top: clamp(3.5rem, 8vw, 6rem); padding-top: clamp(2rem, 5vw, 4rem); border-top: 1px solid var(--mechanical-line-muted); }
.note-related ul { display: grid; gap: .75rem; margin: 0; padding: 0; list-style: none; }
.note-related li { min-width: 0; }
.site-footer { padding: var(--space-5) 0 max(5.75rem, calc(5.75rem + env(safe-area-inset-bottom))); border-top: 1px solid var(--color-border); color: var(--color-text-muted); }
.site-footer__inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-footer__copy { margin: 0; }

.floating-actions { position: fixed; z-index: 20; right: max(1rem, calc(1rem + env(safe-area-inset-right))); bottom: max(1rem, calc(1rem + env(safe-area-inset-bottom))); display: grid; gap: .65rem; }
.floating-actions__button { display: grid; width: 3rem; height: 3rem; place-items: center; border: 1px solid var(--color-border); border-radius: 50%; box-shadow: var(--shadow-elevated); color: var(--color-text); font-size: 1.4rem; transition: transform .2s ease, border-color .2s ease, background-color .2s ease; }
.floating-actions__button:hover { transform: translateY(-2px); }
.floating-actions__button--top { background: var(--color-surface-raised); color: var(--color-accent); }
.floating-actions__button--top:hover { border-color: var(--color-accent); }
.floating-actions__button--whatsapp { background: var(--color-whatsapp); color: #fff; }
.floating-actions__button--whatsapp:hover { border-color: var(--color-whatsapp-border); }
.floating-actions__button[hidden] { display: none; }

/* Responsive breakpoints: 480px actions, 900px desktop navigation/layout, 1000px wide navigation spacing. */
@media (min-width: 900px) {
  .site-menu { position: static; display: flex; min-width: 0; align-items: center; overflow: visible; padding: 0; border: 0; background: transparent; box-shadow: none; }
  .site-menu__list { display: flex; min-width: 0; align-items: center; gap: .15rem; }
  .site-menu__link { padding: .55rem .7rem; font-size: .8rem; }
  .site-menu__language { margin: 0 0 0 .5rem; padding: .55rem .7rem; }
  .menu-toggle { display: none; }
  .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(22rem, .95fr); gap: 2rem; }
  .hero-visual { min-height: 33rem; }
  .card-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .case-layout { grid-template-columns: minmax(13rem, .72fr) minmax(0, 1.28fr); gap: 4rem; }
  .case-problem-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .case-decision-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .case-compare { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-study--engineering .case-architecture { grid-template-columns: minmax(0, .72fr) 2rem minmax(0, 1.28fr); align-items: center; }
  .case-study--engineering .case-architecture__connector { width: 2rem; height: .5rem; background: radial-gradient(circle at 0 50%, var(--mechanical-marker) 0 .15rem, transparent .17rem), radial-gradient(circle at 100% 50%, var(--mechanical-marker) 0 .15rem, transparent .17rem), linear-gradient(var(--mechanical-line), var(--mechanical-line)) center / 100% 1px no-repeat; }
  .case-study--engineering .case-architecture__routes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .contact-page__conversation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-page__channel-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-page__form-layout { grid-template-columns: minmax(15rem, .8fr) minmax(0, 1.2fr); gap: 4rem; }
  .contact-form__fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field--full { grid-column: 1 / -1; }
  .note-diagram__grid { grid-template-columns: minmax(12rem, .65fr) minmax(0, 1.35fr); align-items: start; }
}
@media (min-width: 1000px) { .site-menu__link { padding-inline: .9rem; } .hero-visual { width: 32rem; } .hero-instrument { width: 35rem; } }
@media (max-width: 480px) {
  .floating-actions__button { width: 2.8rem; height: 2.8rem; }

  html.no-js .floating-actions {
    position: static;
    justify-content: end;
    margin: 0 var(--space-3) var(--space-4);
  }
}
@media (max-width: 480px) {
  .case-study--engineering .case-problem-grid--inspection .card::before, .case-study--engineering .case-problem-grid--inspection .card::after, .case-study--engineering .case-decision-grid--assembly .card::before, .case-study--engineering .case-decision-grid--assembly .card::after { display: none; }
  .case-study--engineering .case-architecture__routes { grid-template-columns: minmax(0, 1fr); }
  .case-study--engineering .case-section--outcome .case-layout::before { display: none; }
  .hero-instrument { width: min(108%, 23rem); clip-path: inset(0 0 34% 0); opacity: .58; translate: 0 -1.25rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}