/*
  WOT Builds – main styles
  - Yellow-on-dark theme
  - CSS Grid + Flexbox layout
*/

:root {
  /* Color roles */
  --color-page-bg: #05060a;
  --color-surface: #11131a;
  --color-surface-soft: #181b24;
  --color-accent: #ffd94a;
  --color-accent-soft: #f6c63a;
  --color-accent-secondary: #3bbfd6;
  --color-text: #f7f7fb;
  --color-text-muted: #a5a9b8;
  --color-border-subtle: #262a36;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Layout */
  --max-width: 1120px;
  --spacing-xs: 0.4rem;
  --spacing-sm: 0.8rem;
  --spacing-md: 1.2rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3.2rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;
  --shadow-soft: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-subtle: 0 4px 16px rgba(0, 0, 0, 0.35);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-med: 220ms ease-out;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  background: radial-gradient(circle at top, #181b24 0, #05060a 55%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

button {
  font-family: inherit;
}

.skip-link {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: -3rem;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-accent);
  color: #000;
  text-decoration: none;
  border-radius: var(--radius-full);
  z-index: 999;
  transition: top var(--transition-fast);
}

.skip-link:focus-visible {
  top: 1rem;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border-subtle);
}

/* Optional subtle section backgrounds for stock imagery */

.section--bg {
  position: relative;
  overflow: hidden;
}

.section--bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--section-bg-image);
  background-size: cover;
  background-position: center;
  opacity: 0.16;
  filter: saturate(0.9) contrast(1.05);
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: -1;
}

.section--bg > .container {
  position: relative;
  z-index: 1;
}

.section-header {
  max-width: 640px;
}

.section-header h2 {
  font-size: 1.8rem;
  letter-spacing: 0.03em;
  margin: 0 0 var(--spacing-sm);
}

.section-header p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Header / Nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(5, 6, 10, 0.96), rgba(5, 6, 10, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.logo span {
  color: var(--color-accent);
}

.nav {
  position: relative;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-full);
  padding: var(--spacing-xs) var(--spacing-md);
}

.nav-list {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}

.nav-list a {
  color: var(--color-text-muted);
  text-decoration: none;
  position: relative;
  padding-block: 0.1rem;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-med), color var(--transition-med), border-color var(--transition-med), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: #000;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-accent-soft);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-subtle);
}

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

.btn:focus-visible {
  outline: 2px solid var(--color-accent-secondary);
  outline-offset: 2px;
}

/* Hero */

.section-hero {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  --section-bg-image: url("../img/bg-hero-smart-dashboard.jpg");
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--spacing-xl);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-xs);
}

.section-hero h1 {
  font-size: clamp(2.1rem, 3vw + 1rem, 2.8rem);
  line-height: 1.1;
  margin: 0 0 var(--spacing-md);
}

.section-hero .lead {
  margin: 0 0 var(--spacing-md);
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.hero-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-grid-visual {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-sm);
  background: radial-gradient(circle at top, #262a36 0, #11131a 65%);
  padding: var(--spacing-lg);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border-subtle);
}

.hero-node {
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  background: rgba(5, 6, 10, 0.7);
  border: 1px solid var(--color-border-subtle);
  font-size: 0.8rem;
  line-height: 1.3;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-muted);
}

.hero-node--web {
  grid-column: 1 / 3;
}

.hero-node--automation {
  grid-column: 2 / 4;
}

.hero-node--home {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero-node--power {
  border-color: var(--color-accent-secondary);
}

/* Services */

.section-services {
  background: var(--color-surface);
}

.cards-grid {
  margin-top: var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.card {
  background: var(--color-surface-soft);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--color-text-muted);
}

.card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.card ul li + li {
  margin-top: 0.15rem;
}

.card-service {
  /* Slightly stronger background for service cards to separate from page */
  background: radial-gradient(circle at top, rgba(38, 42, 54, 0.9) 0, rgba(17, 19, 26, 0.98) 55%);
}

/* Featured builds */

.section-featured {
  background: var(--color-page-bg);
}

.featured-grid {
  margin-top: var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
}

.card-featured .card-summary {
  color: var(--color-text-muted);
}

.card-featured ul {
  list-style: none;
  padding-left: 0;
}

.card-featured ul li::before {
  content: "•";
  color: var(--color-accent);
  display: inline-block;
  width: 1em;
  margin-left: 0;
}

/* Featured cards with subtle illustrative backgrounds */

.card--bg {
  position: relative;
  overflow: hidden;
}

.card--bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--card-bg-image);
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  filter: blur(2px) saturate(0.9);
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: 0;
}

.card--bg > * {
  position: relative;
  z-index: 1;
}

.card-featured--whole-home {
  --card-bg-image: url("../img/bg-featured-whole-home.jpg");
}

.card-featured--dashboard {
  --card-bg-image: url("../img/bg-featured-dashboard.jpg");
}

.card-featured--sensors {
  --card-bg-image: url("../img/bg-featured-sensors.jpg");
}

/* Service card imagery assignments */

.card-service--web {
  --card-bg-image: url("../img/bg-service-web.jpg");
}

.card-service--home {
  --card-bg-image: url("../img/bg-service-home.jpg");
}

.card-service--automation {
  --card-bg-image: url("../img/bg-service-automation.jpg");
}

.card-service--electrical {
  --card-bg-image: url("../img/bg-service-electrical.jpg");
}

/* Process */

.section-process {
  background: var(--color-surface);
}

.process-grid {
  margin-top: var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  list-style: none;
  padding: 0;
}

.process-step {
  position: relative;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border-subtle);
}

.process-step-number {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #000;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.process-step h3 {
  margin: 0 0 var(--spacing-xs);
}

.process-step p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Tech */

.section-tech {
  background: var(--color-page-bg);
}

.badge-grid {
  margin-top: var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-sm);
}

.badge {
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background: rgba(17, 19, 26, 0.9);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* About */

.section-about {
  background: var(--color-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: var(--spacing-xl);
  align-items: flex-start;
}

.about-copy p {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-muted);
}

.about-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.pill {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  font-size: 0.85rem;
  background: rgba(5, 6, 10, 0.7);
}

/* Contact */

.section-contact {
  background: var(--color-page-bg);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr);
  gap: var(--spacing-lg);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-email {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.email-text {
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  color: var(--color-accent);
  cursor: pointer;
  font: inherit;
}

.email-text:hover,
.email-text:focus-visible {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  background: #050509;
  border-top: 1px solid var(--color-border-subtle);
}

.footer-inner {
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-brand {
  margin: 0 0 0.3rem;
}

.footer-contact {
  margin: 0 0 0.3rem;
}

.footer-meta {
  margin: 0;
}

/* Scroll to top */

.scroll-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background: rgba(5, 6, 10, 0.9);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-subtle);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--transition-med), transform var(--transition-med);
}

.scroll-top--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  background: var(--color-surface-soft);
  color: var(--color-text);
  border-radius: var(--radius-full);
  padding: 0.5rem 1.2rem;
  box-shadow: var(--shadow-subtle);
  border: 1px solid var(--color-border-subtle);
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med), transform var(--transition-med);
}

.toast--visible {
  opacity: 1;
  transform: translate(-50%, -6px);
}

/* Reveal on scroll */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 420ms ease-out, transform 420ms ease-out;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */

@media (max-width: 768px) {
  .header-inner {
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    background: rgba(5, 6, 10, 0.98);
    border: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-subtle);
    min-width: 10rem;
    transform-origin: top right;
    transform: scale(0.96);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med), transform var(--transition-med);
  }

  .nav-list--open {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

  .header-cta {
    display: none;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
  }

  .about-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .contact-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .scroll-top {
    right: 1rem;
    bottom: 1rem;
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--spacing-lg) 0;
  }

  .cards-grid,
  .featured-grid,
  .process-grid,
  .badge-grid {
    gap: var(--spacing-sm);
  }

  .hero-grid-visual {
    padding: var(--spacing-md);
  }
}