/* ============================================================
   ACEYA SYSTEMS — Design System
   Graphite + Electric Lime | Technical Consultancy
   ============================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font-family: inherit;
}

button {
  cursor: pointer;
}

/* ---------- Design Tokens ---------- */
:root {
  --bg: #0D0F0E;
  --bg-raised: #191C1A;
  --bg-card: #191C1A;

  --text-primary: #F3F1E8;
  --text-secondary: #9A9D98;

  --accent: #B7F34A;
  --accent-dim: rgba(183, 243, 74, 0.15);
  --accent-subtle: rgba(183, 243, 74, 0.45);

  --border: #2A2D2B;

  --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  --shadow-accent: 0 8px 30px rgba(183, 243, 74, 0.25);

  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  --container-width: 1120px;
  --nav-height: 73px;
}

/* ---------- Reduced Motion ---------- */
@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;
  }
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 1.8vw, 1.6rem);
}

h4 {
  font-size: 1.1rem;
}

p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 65ch;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

/* ---------- Utility ---------- */
.container {
  width: min(100% - 3rem, var(--container-width));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section-label {
  display: block;
  width: fit-content;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.content-narrow {
  max-width: 600px;
}

.text-center {
  text-align: center;
}

.text-secondary {
  color: var(--text-secondary);
}

.text-accent {
  color: var(--accent);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease,
    color 0.25s ease,
    background 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  color: #0D0F0E;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0);
}

/* ---------- Focus ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(13, 15, 14, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  width: min(100% - 3rem, var(--container-width));
  height: 100%;
  margin-inline: auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  flex-shrink: 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a[aria-current='page'] {
  color: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;

  width: 44px;
  height: 44px;
  padding: 0.5rem;

  background: transparent;
  border: 0;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  background: var(--text-primary);
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
}

/* ---------- Hero ---------- */
.hero {
  padding: 10rem 0 5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 3rem;
  align-items: center;
}

.hero-content {
  min-width: 0;
}

.hero-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Hero Diagram ---------- */
.hero-diagram {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.hero-diagram::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      135deg,
      rgba(183, 243, 74, 0.04),
      transparent 50%
    );
  pointer-events: none;
}

.hero-diagram .flow {
  position: relative;
  z-index: 1;

  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.hero-diagram .flow-item {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  background: var(--bg);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  width: fit-content;
  max-width: 100%;
  text-align: center;
}

.hero-diagram .flow-arrow {
  color: var(--accent);
  font-size: 0.8rem;
  opacity: 0.6;
}

.hero-diagram .flow-accent {
  color: var(--accent);
  border-color: var(--accent-subtle);
  background: var(--accent-dim);
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fit,
    minmax(min(100%, 280px), 1fr)
  );
  gap: 1.5rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;

  display: flex;
  flex-direction: column;

  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    background 0.3s ease;
}

.service-card:hover {
  border-color: var(--accent-subtle);
  transform: translateY(-3px);
  background: #1B1F1C;
}

.service-card.featured {
  border-color: rgba(183, 243, 74, 0.35);
  background:
    linear-gradient(
      135deg,
      rgba(183, 243, 74, 0.06),
      transparent 50%
    ),
    var(--bg-raised);
}

.service-card .icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 1rem;
}

.service-card .badge {
  display: inline-block;
  width: fit-content;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

.service-card h3 {
  margin-bottom: 0.5rem;
}

.service-card p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.service-card .link {
  margin-top: auto;
  color: var(--accent);
  font-weight: 500;
}

/* ---------- Principles ---------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fit,
    minmax(min(100%, 280px), 1fr)
  );
  gap: 1.5rem;
  margin-top: 2rem;
}

.principle-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;

  transition:
    transform 0.25s ease,
    border-color 0.25s ease;
}

.principle-card:hover {
  border-color: var(--accent-subtle);
  transform: translateY(-2px);
}

.principle-card .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.principle-card h4 {
  margin-bottom: 0.5rem;
}

.principle-card p {
  font-size: 0.95rem;
}

/* ---------- Principle Detail ---------- */
.principle-detail {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.principle-detail:first-child {
  border-top: 1px solid var(--border);
}

.principle-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent);
}

.principle-content h2 {
  margin-bottom: 0.75rem;
}

/* ---------- Case Study Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fit,
    minmax(min(100%, 280px), 1fr)
  );
  gap: 1.5rem;
  margin-top: 2rem;
}

.case-study-card {
  display: block;

  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;

  color: var(--text-primary);

  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    background 0.3s ease;
}

.case-study-card:hover {
  border-color: var(--accent-subtle);
  transform: translateY(-3px);
  background: #1B1F1C;
}

.case-study-card .num {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.case-study-card h4 {
  margin-bottom: 0.5rem;
}

.case-study-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.case-study-card .text-accent {
  font-weight: 500;
}

/* ---------- Service Detail ---------- */
.service-detail {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.service-detail:first-child {
  border-top: 1px solid var(--border);
}

.service-detail-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.service-detail h2 {
  margin-bottom: 0.75rem;
}

.service-capabilities {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.capability {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.capability-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

.capability p {
  font-size: 0.9rem;
}

.service-stack {
  display: block;
  margin-top: 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.25rem 2rem 1.25rem 0;

  position: relative;

  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);

  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 2rem 1.25rem 0;
  font-size: 0.95rem;
}

/* ---------- Insight Cards ---------- */
.insight-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;

  transition:
    transform 0.3s ease,
    border-color 0.3s ease;
}

.insight-card:hover {
  border-color: var(--accent-subtle);
  transform: translateY(-2px);
}

.insight-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

/* ---------- System Status ---------- */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;

  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;

  color: var(--text-secondary);
}

.status-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- CTA ---------- */
.cta-section {
  background: var(--bg-raised);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 0;
  text-align: center;
}

.cta-section h2 {
  max-width: 600px;
  margin: 0 auto 1rem;
}

.cta-section p {
  max-width: 500px;
  margin: 0 auto 2rem;
}

.cta-section .btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 3rem;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 560px;
}

.contact-form label {
  display: block;
  margin-bottom: 0.3rem;

  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

.contact-form input,
.contact-form textarea {
  width: 100%;

  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);

  padding: 0.85rem 1rem;

  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;

  transition: border-color 0.2s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #6F726E;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.contact-form .feedback {
  margin-top: 0.5rem;
  min-height: 1.5em;
  font-size: 0.9rem;
  color: var(--accent);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p,
.footer a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links a {
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ---------- Reveal Animation ---------- */
/*
   script.js should add .js to <html>.
   Without JS, content remains visible.
*/
.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

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

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 950px) {
  .nav-links {
    gap: 1.25rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-diagram {
    max-width: 600px;
  }

  .service-capabilities {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 768px) {
  :root {
    --nav-height: 65px;
  }

  .container,
  .nav-inner {
    width: min(100% - 2rem, var(--container-width));
  }

  .section {
    padding: 4rem 0;
  }

  /* Navigation */
  .nav-links {
    display: none;

    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;

    flex-direction: column;
    align-items: stretch;
    gap: 0;

    padding: 0.75rem 1rem 1rem;

    background: rgba(13, 15, 14, 0.98);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.85rem 0.5rem;
  }

  .nav-links .btn {
    margin-top: 0.5rem;
    text-align: center;
  }

  .nav-burger {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: 8rem 0 4rem;
    min-height: auto;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }

  .hero p {
    font-size: 1.05rem;
  }

  .hero-diagram {
    padding: 1.5rem;
  }

  /* Cards */
  .services-grid,
  .principles-grid,
  .card-grid {
    grid-template-columns: 1fr;
  }

  /* Principles */
  .principle-detail {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 2rem 0;
  }

  /* Service details */
  .service-detail {
    padding: 2.5rem 0;
  }

  .service-capabilities {
    grid-template-columns: 1fr;
  }

  /* CTA */
  .cta-section {
    padding: 3.5rem 0;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

/* ---------- Small Mobile ---------- */
@media (max-width: 480px) {
  h2 {
    font-size: 1.9rem;
  }

  .container,
  .nav-inner {
    width: min(100% - 1.5rem, var(--container-width));
  }

  .hero {
    padding-top: 7.5rem;
  }

  .hero-tag {
    font-size: 0.65rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn,
  .cta-section .btn-group .btn {
    width: 100%;
  }

  .btn {
    padding: 0.8rem 1.5rem;
  }

  .service-card,
  .principle-card,
  .case-study-card,
  .insight-card {
    padding: 1.25rem;
  }

  .hero-diagram {
    padding: 1.25rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 0.75rem;
  }
}

/* ---------- Touch Devices ---------- */
@media (hover: none) {
  .service-card:hover,
  .principle-card:hover,
  .case-study-card:hover,
  .insight-card:hover {
    transform: none;
  }

  .btn-primary:hover,
  .btn-ghost:hover {
    transform: none;
    box-shadow: none;
  }
}