/*
 * DieselSS Industrial — design system
 *
 * Kinship with aerialss.com (shared blue depth, industrial sans), retuned
 * for diesel: near-black base inherited from the original Rajdhani
 * placeholder, heavier display weight, amber diesel accent where the
 * sister site uses green. See theme README for the token table.
 */

/* ---------------------------------------------------------------- *
 * Self-hosted fonts (latin subsets; no external requests)
 * ---------------------------------------------------------------- */
@font-face {
  font-family: 'Rajdhani';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/rajdhani-latin-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Rajdhani';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/rajdhani-latin-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Rajdhani';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/rajdhani-latin-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Barlow';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/barlow-latin-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Barlow';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/barlow-latin-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Barlow';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/barlow-latin-600.woff2') format('woff2');
}

/* ---------------------------------------------------------------- *
 * Design tokens
 * ---------------------------------------------------------------- */
:root {
  /* Palette — family blues from aerialss.com, diesel-dark base */
  --di-ink-900: #070b10;      /* deepest base (page bg) */
  --di-ink-800: #0a0e12;      /* placeholder black, lifted */
  --di-ink-700: #11161d;      /* raised surface */
  --di-ink-600: #161e28;      /* cards, panels */
  --di-ink-500: #1e2933;      /* borders on dark */
  --di-steel-400: #64798c;    /* muted text */
  --di-steel-300: #9fb0c0;    /* body text on dark */
  --di-steel-100: #e8eef4;    /* headings on dark */
  --di-blue-900: #004a59;     /* deep teal (aerialss kinship) */
  --di-blue-700: #005a87;     /* family blue */
  --di-blue-600: #006ba1;     /* family blue */
  --di-blue-500: #007cba;     /* family blue, bright */
  --di-amber-500: #ffb020;    /* diesel accent (replaces aerialss green) */
  --di-amber-600: #e09a12;    /* pressed/hover accent */
  --di-focus: #4db2ff;        /* keyboard focus ring */

  /* Typography */
  --di-font-display: 'Rajdhani', 'Arial Narrow', system-ui, sans-serif;
  --di-font-body: 'Barlow', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --di-step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --di-step-0: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --di-step-1: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --di-step-2: clamp(1.6rem, 1.4rem + 1vw, 2.2rem);
  --di-step-3: clamp(2.1rem, 1.7rem + 2vw, 3.4rem);
  --di-step-4: clamp(2.6rem, 1.9rem + 3.5vw, 4.8rem);

  /* Spacing scale (rem) */
  --di-space-1: 0.25rem;
  --di-space-2: 0.5rem;
  --di-space-3: 1rem;
  --di-space-4: 1.5rem;
  --di-space-5: 2.5rem;
  --di-space-6: 4rem;
  --di-space-7: 6.5rem;

  /* Rhythm + shape */
  --di-line-body: 1.65;
  --di-radius: 6px;
  --di-radius-lg: 10px;
  --di-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --di-header-h: 72px;
  --di-container: 1160px;
}

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

html {
  scroll-behavior: smooth;
}

body.di-theme {
  margin: 0;
  background: var(--di-ink-900);
  color: var(--di-steel-300);
  font-family: var(--di-font-body);
  font-size: var(--di-step-0);
  line-height: var(--di-line-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--di-font-display);
  font-weight: 700;
  color: var(--di-steel-100);
  line-height: 1.12;
  margin: 0 0 var(--di-space-3);
  text-wrap: balance;
}

h1 { font-size: var(--di-step-3); }
h2 { font-size: var(--di-step-2); }
h3 { font-size: var(--di-step-1); }

p {
  margin: 0 0 var(--di-space-3);
}

a {
  color: var(--di-blue-500);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--di-amber-500);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--di-focus);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  height: auto;
}

di-skip-link,
.di-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--di-amber-500);
  color: var(--di-ink-900);
  font-family: var(--di-font-display);
  font-weight: 700;
  padding: var(--di-space-2) var(--di-space-3);
  z-index: 100;
}

di-skip-link:focus,
.di-skip-link:focus {
  left: var(--di-space-3);
  top: var(--di-space-3);
}

.di-container {
  width: min(var(--di-container), 100% - 2 * var(--di-space-4));
  margin-inline: auto;
}

main#pb-main {
  min-height: 60vh;
}

/* Heritage: faint blueprint grid + corner brackets (from the placeholder) */
.di-site {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.di-site::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 124, 186, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 124, 186, 0.035) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
  z-index: -1;
}

.di-site > footer {
  margin-top: auto;
}

/* ---------------------------------------------------------------- *
 * Header / navigation
 * ---------------------------------------------------------------- */
header.di-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 11, 16, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--di-ink-500);
}

.di-header__inner {
  display: flex;
  align-items: center;
  gap: var(--di-space-4);
  min-height: var(--di-header-h);
}

.di-brand {
  display: flex;
  align-items: center;
  gap: var(--di-space-3);
  color: var(--di-steel-100);
}

.di-brand img {
  width: 44px;
  height: auto;
  display: block;
}

.di-brand__name {
  font-family: var(--di-font-display);
  font-weight: 700;
  font-size: var(--di-step-1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.di-brand__name small {
  display: block;
  font-family: var(--di-font-body);
  font-weight: 500;
  font-size: var(--di-step--1);
  color: var(--di-steel-400);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

nav.di-nav {
  margin-left: auto;
}

.di-nav ul {
  list-style: none;
  display: flex;
  gap: var(--di-space-4);
  margin: 0;
  padding: 0;
}

.di-nav a {
  font-family: var(--di-font-display);
  font-weight: 600;
  font-size: var(--di-step-0);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--di-steel-300);
  padding: var(--di-space-2) 0;
  border-bottom: 2px solid transparent;
}

.di-nav a:hover,
.di-nav a:focus-visible,
.di-nav .current-menu-item > a,
.di-nav .current_page_item > a {
  color: var(--di-steel-100);
  border-bottom-color: var(--di-amber-500);
}

.di-nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--di-ink-500);
  border-radius: var(--di-radius);
  color: var(--di-steel-100);
  font-family: var(--di-font-display);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--di-space-2) var(--di-space-3);
  cursor: pointer;
}

@media (max-width: 782px) {
  .di-nav-toggle {
    display: inline-flex;
  }

  nav.di-nav {
    display: none;
    position: absolute;
    top: var(--di-header-h);
    left: 0;
    right: 0;
    background: var(--di-ink-800);
    border-bottom: 1px solid var(--di-ink-500);
    padding: var(--di-space-3) var(--di-space-4) var(--di-space-4);
  }

  nav.di-nav.is-open {
    display: block;
  }

  .di-nav ul {
    flex-direction: column;
    gap: var(--di-space-2);
  }
}

/* ---------------------------------------------------------------- *
 * Buttons
 * ---------------------------------------------------------------- */
.di-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--di-space-2);
  font-family: var(--di-font-display);
  font-weight: 700;
  font-size: var(--di-step-0);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: var(--di-space-3) var(--di-space-5);
  border-radius: var(--di-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.di-btn--primary {
  background: var(--di-amber-500);
  color: var(--di-ink-900);
}

.di-btn--primary:hover,
.di-btn--primary:focus-visible {
  background: var(--di-amber-600);
  color: var(--di-ink-900);
}

.di-btn--ghost {
  background: transparent;
  color: var(--di-blue-500);
  border-color: var(--di-blue-500);
}

.di-btn--ghost:hover,
.di-btn--ghost:focus-visible {
  color: var(--di-steel-100);
  border-color: var(--di-steel-100);
}

/* ---------------------------------------------------------------- *
 * Hero (homepage + home preview template)
 * ---------------------------------------------------------------- */
.di-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 80% at 15% 0%, rgba(0, 90, 135, 0.35) 0%, transparent 60%),
    radial-gradient(ellipse 50% 70% at 90% 100%, rgba(0, 74, 89, 0.3) 0%, transparent 60%),
    linear-gradient(180deg, var(--di-ink-800) 0%, var(--di-ink-900) 100%);
  padding: var(--di-space-7) 0 var(--di-space-6);
}

/* Corner brackets — placeholder heritage, blue TL / amber BR */
.di-hero::before,
.di-hero::after {
  content: '';
  position: absolute;
  width: 72px;
  height: 72px;
  pointer-events: none;
  opacity: 0.55;
}

.di-hero::before {
  top: var(--di-space-4);
  left: var(--di-space-4);
  border-top: 2px solid var(--di-blue-500);
  border-left: 2px solid var(--di-blue-500);
}

.di-hero::after {
  bottom: var(--di-space-4);
  right: var(--di-space-4);
  border-bottom: 2px solid var(--di-amber-500);
  border-right: 2px solid var(--di-amber-500);
}

.di-hero__grid {
  display: grid;
  gap: var(--di-space-5);
  align-items: center;
}

@media (min-width: 900px) {
  .di-hero__grid {
    grid-template-columns: 1.25fr 0.75fr;
  }
}

.di-kicker {
  display: inline-block;
  background: var(--di-blue-700);
  color: var(--di-steel-100);
  font-family: var(--di-font-display);
  font-weight: 600;
  font-size: var(--di-step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: var(--di-space-1) var(--di-space-3);
  border-radius: 3px;
  margin-bottom: var(--di-space-3);
}

.di-hero h1 {
  font-size: var(--di-step-4);
  margin-bottom: var(--di-space-3);
}

.di-hero h1 em {
  font-style: normal;
  color: var(--di-blue-500);
}

.di-hero__lede {
  font-size: var(--di-step-1);
  color: var(--di-steel-300);
  max-width: 34ch;
}

.di-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--di-space-3);
  margin-top: var(--di-space-4);
}

.di-hero__mark {
  display: flex;
  justify-content: center;
}

.di-hero__mark img {
  width: min(320px, 60vw);
  filter: drop-shadow(0 18px 44px rgba(0, 124, 186, 0.35));
}

/* ---------------------------------------------------------------- *
 * Sections (services / about / contact)
 * ---------------------------------------------------------------- */
.di-section {
  padding: var(--di-space-6) 0;
}

.di-section--alt {
  background: var(--di-ink-800);
  border-top: 1px solid var(--di-ink-500);
  border-bottom: 1px solid var(--di-ink-500);
}

.di-section__head {
  margin-bottom: var(--di-space-5);
}

.di-section__head p {
  max-width: 60ch;
}

.di-cards {
  display: grid;
  gap: var(--di-space-4);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.di-card {
  background: var(--di-ink-600);
  border: 1px solid var(--di-ink-500);
  border-radius: var(--di-radius-lg);
  padding: var(--di-space-4);
}

.di-card h3 {
  color: var(--di-steel-100);
}

.di-card__num {
  font-family: var(--di-font-display);
  font-weight: 700;
  font-size: var(--di-step-1);
  color: var(--di-amber-500);
  display: block;
  margin-bottom: var(--di-space-2);
}

.di-split {
  display: grid;
  gap: var(--di-space-5);
}

@media (min-width: 900px) {
  .di-split {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.di-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--di-space-3);
}

.di-contact-list li {
  display: flex;
  flex-direction: column;
  gap: var(--di-space-1);
  background: var(--di-ink-600);
  border: 1px solid var(--di-ink-500);
  border-left: 3px solid var(--di-blue-500);
  border-radius: var(--di-radius);
  padding: var(--di-space-3) var(--di-space-4);
}

.di-contact-list .di-contact-list__label {
  font-family: var(--di-font-display);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: var(--di-step--1);
  color: var(--di-steel-400);
}

.di-contact-list strong,
.di-contact-list a {
  color: var(--di-steel-100);
  font-weight: 600;
}

/* ---------------------------------------------------------------- *
 * Page / single / archive content
 * ---------------------------------------------------------------- */
.di-page-header {
  background: linear-gradient(180deg, var(--di-ink-800), var(--di-ink-900));
  border-bottom: 1px solid var(--di-ink-500);
  padding: var(--di-space-6) 0;
  margin-bottom: var(--di-space-5);
}

.di-page-header h1 {
  margin: 0;
}

.di-prose {
  max-width: 74ch;
}

.di-prose .pb-content,
article.pb-page .pb-content,
article.pb-single .pb-content {
  /* Long-form readability */
}

article.pb-page,
article.pb-single,
article.pb-post {
  max-width: 74ch;
  margin-inline: auto;
}

.pb-meta {
  color: var(--di-steel-400);
  font-size: var(--di-step--1);
  letter-spacing: 0.04em;
  margin-bottom: var(--di-space-4);
}

.pb-featured-image img {
  border-radius: var(--di-radius-lg);
  border: 1px solid var(--di-ink-500);
}

.pb-post-nav {
  display: flex;
  gap: var(--di-space-4);
  margin-top: var(--di-space-5);
  justify-content: space-between;
}

/* 404 */
.di-404 {
  text-align: center;
  padding: var(--di-space-7) var(--di-space-4);
}

.di-404 .di-404__code {
  font-family: var(--di-font-display);
  font-weight: 700;
  font-size: var(--di-step-4);
  color: var(--di-amber-500);
  line-height: 1;
}

.di-404 h1 {
  font-size: var(--di-step-2);
}

/* ---------------------------------------------------------------- *
 * Footer
 * ---------------------------------------------------------------- */
footer.di-footer {
  background: var(--di-ink-800);
  border-top: 2px solid var(--di-blue-700);
  padding: var(--di-space-6) 0 var(--di-space-4);
  margin-top: var(--di-space-6);
}

.di-footer__grid {
  display: grid;
  gap: var(--di-space-5);
}

@media (min-width: 782px) {
  .di-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.di-footer h4 {
  font-size: var(--di-step-0);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--di-steel-400);
  margin-bottom: var(--di-space-3);
}

.di-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--di-space-2);
}

.di-footer__address {
  font-style: normal;
  display: grid;
  gap: var(--di-space-1);
}

.di-footer__sister {
  margin-top: var(--di-space-3);
  font-size: var(--di-step--1);
  color: var(--di-steel-400);
}

.di-footer__sister a {
  color: var(--di-steel-300);
}

.di-footer__bar {
  margin-top: var(--di-space-5);
  padding-top: var(--di-space-3);
  border-top: 1px solid var(--di-ink-500);
  display: flex;
  flex-wrap: wrap;
  gap: var(--di-space-2);
  justify-content: space-between;
  font-size: var(--di-step--1);
  color: var(--di-steel-400);
}

/* ---------------------------------------------------------------- *
 * Forms (FluentForms + core) sanity
 * ---------------------------------------------------------------- */
input[type='text'],
input[type='email'],
input[type='tel'],
input[type='url'],
input[type='password'],
input[type='search'],
textarea,
select {
  background: var(--di-ink-700);
  border: 1px solid var(--di-ink-500);
  border-radius: var(--di-radius);
  color: var(--di-steel-100);
  font-family: var(--di-font-body);
  font-size: var(--di-step-0);
  padding: var(--di-space-2) var(--di-space-3);
  width: 100%;
}

input::placeholder,
textarea::placeholder {
  color: var(--di-steel-400);
}

button,
input[type='submit'],
input[type='button'] {
  font-family: var(--di-font-display);
  font-weight: 600;
}

/* FluentForms wrapper sanity */
.ff-itm,
.ff-el-group,
.ff-btn-submit {
  max-width: 74ch;
}

.ff-btn-submit,
.ff-el-group button[type='submit'] {
  background: var(--di-amber-500) !important;
  color: var(--di-ink-900) !important;
  border: none !important;
  border-radius: var(--di-radius) !important;
  font-family: var(--di-font-display) !important;
  font-weight: 700 !important;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--di-space-3) var(--di-space-5) !important;
  cursor: pointer;
}

/* ---------------------------------------------------------------- *
 * WooCommerce sanity (full store styling is #7)
 * ---------------------------------------------------------------- */
body.di-woo {
  background: var(--di-ink-900);
}

.woocommerce ul.products li.product,
.woocommerce-page ul.products li.product {
  background: var(--di-ink-600);
  border: 1px solid var(--di-ink-500);
  border-radius: var(--di-radius-lg);
  padding: var(--di-space-3);
}

.woocommerce ul.products li.product .woocommerce-loop-product__title,
.woocommerce div.product .product_title,
.woocommerce .price {
  color: var(--di-steel-100);
}

.woocommerce ul.products li.product .price {
  color: var(--di-amber-500);
  font-family: var(--di-font-display);
  font-weight: 700;
}

.woocommerce ul.products li.product .button,
.woocommerce a.button,
.woocommerce button.button,
.woocommerce input.button,
.woocommerce #respond input#submit,
.woocommerce a.button.alt {
  background: var(--di-amber-500);
  color: var(--di-ink-900);
  font-family: var(--di-font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--di-radius);
}

.woocommerce a.button:hover,
.woocommerce button.button:hover,
.woocommerce input.button:hover,
.woocommerce a.button.alt:hover {
  background: var(--di-amber-600);
  color: var(--di-ink-900);
}

.woocommerce-message,
.woocommerce-info {
  background: var(--di-ink-600);
  border-top-color: var(--di-blue-500);
  color: var(--di-steel-100);
}

.woocommerce-error {
  background: var(--di-ink-600);
  border-top-color: #ef4444;
  color: var(--di-steel-100);
}

.woocommerce table.shop_table,
.woocommerce-cart table.cart {
  border: 1px solid var(--di-ink-500);
  border-radius: var(--di-radius);
}

/* ---------------------------------------------------------------- *
 * Preview banner (home preview template)
 * ---------------------------------------------------------------- */
.di-preview-note {
  background: var(--di-blue-900);
  color: var(--di-steel-100);
  font-family: var(--di-font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--di-step--1);
  text-align: center;
  padding: var(--di-space-2) var(--di-space-3);
}

/* ---------------------------------------------------------------- *
 * Reduced motion + print
 * ---------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body.di-theme {
    background: #fff;
    color: #000;
  }
}