/* ================================================================
   HYDRON APPLICATIONS — styles.css
   Premium modern product/studio site
   ================================================================ */

/* ----------------------------------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
---------------------------------------------------------------- */
:root {
  /* Colours */
  --colour-bg:           #0a0b0e;
  --colour-bg-secondary: #0f1117;
  --colour-bg-card:      #13161f;
  --colour-bg-card-hover:#181c28;
  --colour-border:       rgba(255, 255, 255, 0.07);
  --colour-border-hover: rgba(255, 255, 255, 0.14);

  --colour-text:         #e8eaf0;
  --colour-text-muted:   #8892a4;
  --colour-text-subtle:  #5a6270;

  --colour-accent:       #4f8ef7;
  --colour-accent-light: #7aabff;
  --colour-accent-glow:  rgba(79, 142, 247, 0.18);
  --colour-accent-glow-strong: rgba(79, 142, 247, 0.35);

  --colour-green:        #3ddc84;
  --colour-white:        #ffffff;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', 'Cascadia Code', 'JetBrains Mono', monospace;

  /* Font sizes — fluid scale */
  --fs-xs:   clamp(0.7rem,   1.5vw, 0.75rem);
  --fs-sm:   clamp(0.85rem,  1.8vw, 0.9rem);
  --fs-base: clamp(0.95rem,  2vw,   1rem);
  --fs-md:   clamp(1rem,     2.2vw, 1.125rem);
  --fs-lg:   clamp(1.125rem, 2.5vw, 1.25rem);
  --fs-xl:   clamp(1.25rem,  3vw,   1.5rem);
  --fs-2xl:  clamp(1.5rem,   4vw,   2rem);
  --fs-3xl:  clamp(2rem,     5vw,   2.75rem);
  --fs-4xl:  clamp(2.5rem,   6vw,   3.75rem);
  --fs-5xl:  clamp(3rem,     7vw,   4.5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width:     1200px;
  --nav-height:    72px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 18px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 32px var(--colour-accent-glow);
}

/* ----------------------------------------------------------------
   2. RESET & BASE
---------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--colour-text);
  background-color: var(--colour-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Google Fonts import — Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

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

a:hover {
  color: var(--colour-accent-light);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

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

/* ----------------------------------------------------------------
   3. UTILITIES
---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--colour-accent);
  margin-bottom: var(--space-3);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section-header h2 {
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--colour-white);
  margin-bottom: var(--space-4);
}

.section-intro {
  font-size: var(--fs-md);
  color: var(--colour-text-muted);
  line-height: 1.7;
}

/* ----------------------------------------------------------------
   4. SCROLL REVEAL ANIMATIONS
---------------------------------------------------------------- */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger delays for grid children */
.value-strip-grid  .reveal-up:nth-child(2) { transition-delay: 0.08s; }
.value-strip-grid  .reveal-up:nth-child(3) { transition-delay: 0.16s; }
.value-strip-grid  .reveal-up:nth-child(4) { transition-delay: 0.24s; }
.value-strip-grid  .reveal-up:nth-child(5) { transition-delay: 0.32s; }

.services-grid     .reveal-up:nth-child(2) { transition-delay: 0.07s; }
.services-grid     .reveal-up:nth-child(3) { transition-delay: 0.14s; }
.services-grid     .reveal-up:nth-child(4) { transition-delay: 0.21s; }
.services-grid     .reveal-up:nth-child(5) { transition-delay: 0.28s; }
.services-grid     .reveal-up:nth-child(6) { transition-delay: 0.35s; }

.solve-grid        .reveal-up:nth-child(2) { transition-delay: 0.06s; }
.solve-grid        .reveal-up:nth-child(3) { transition-delay: 0.12s; }
.solve-grid        .reveal-up:nth-child(4) { transition-delay: 0.18s; }
.solve-grid        .reveal-up:nth-child(5) { transition-delay: 0.24s; }
.solve-grid        .reveal-up:nth-child(6) { transition-delay: 0.30s; }
.solve-grid        .reveal-up:nth-child(7) { transition-delay: 0.36s; }
.solve-grid        .reveal-up:nth-child(8) { transition-delay: 0.42s; }

.capabilities-grid .reveal-up:nth-child(2) { transition-delay: 0.07s; }
.capabilities-grid .reveal-up:nth-child(3) { transition-delay: 0.14s; }
.capabilities-grid .reveal-up:nth-child(4) { transition-delay: 0.21s; }
.capabilities-grid .reveal-up:nth-child(5) { transition-delay: 0.28s; }
.capabilities-grid .reveal-up:nth-child(6) { transition-delay: 0.35s; }
.capabilities-grid .reveal-up:nth-child(7) { transition-delay: 0.42s; }
.capabilities-grid .reveal-up:nth-child(8) { transition-delay: 0.49s; }

/* ----------------------------------------------------------------
   5. BUTTONS
---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--border-radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--colour-accent);
  color: var(--colour-white);
  border: 1px solid var(--colour-accent);
  box-shadow: 0 0 0 0 var(--colour-accent-glow);
}

.btn-primary:hover {
  background: var(--colour-accent-light);
  border-color: var(--colour-accent-light);
  color: var(--colour-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--colour-accent-glow-strong);
}

.btn-secondary {
  background: transparent;
  color: var(--colour-text);
  border: 1px solid var(--colour-border-hover);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.25);
  color: var(--colour-white);
  transform: translateY(-1px);
}

/* ----------------------------------------------------------------
   6. NAVIGATION
---------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--transition-base), box-shadow var(--transition-base),
              backdrop-filter var(--transition-base);
}

/* Scrolled state — added by JS */
.site-header.is-scrolled {
  background: rgba(10, 11, 14, 0.90);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--colour-border), var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--colour-white);
  letter-spacing: -0.03em;
  line-height: 1;
}

.nav-logo:hover {
  color: var(--colour-white);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--colour-text-muted);
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--colour-white);
  background: rgba(255,255,255,0.05);
}

/* Nav CTA button */
.nav-link.nav-cta {
  background: var(--colour-accent);
  color: var(--colour-white);
  margin-left: var(--space-3);
  padding: var(--space-2) var(--space-5);
}

.nav-link.nav-cta:hover {
  background: var(--colour-accent-light);
  color: var(--colour-white);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: rgba(255,255,255,0.06);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--colour-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Hamburger open state */
.hamburger.is-open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.is-open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----------------------------------------------------------------
   7. HERO SECTION
---------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-height) + var(--space-16)) var(--space-6) var(--space-24);
}

/* Gradient background */
.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(79, 142, 247, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(79, 142, 247, 0.07) 0%, transparent 60%),
    linear-gradient(180deg, var(--colour-bg) 0%, var(--colour-bg-secondary) 100%);
  z-index: 0;
}

/* Particle container — particles generated by JS */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--colour-accent);
  opacity: 0;
  animation: particle-float linear infinite;
}

@keyframes particle-float {
  0%   { opacity: 0; transform: translateY(0) scale(0); }
  10%  { opacity: 0.5; }
  90%  { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-80vh) scale(1.2); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(79, 142, 247, 0.12);
  border: 1px solid rgba(79, 142, 247, 0.25);
  border-radius: 100px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--colour-accent-light);
  margin-bottom: var(--space-8);
}

.hero-headline {
  font-size: var(--fs-5xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--colour-white);
  margin-bottom: var(--space-6);
}

.headline-accent {
  background: linear-gradient(135deg, var(--colour-accent-light) 0%, var(--colour-accent) 60%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subheading {
  font-size: var(--fs-lg);
  color: var(--colour-text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto var(--space-10);
}

.hero-cta-group {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-cta-group .btn {
  padding: 0.875rem 2rem;
  font-size: var(--fs-base);
}

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-dot {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--colour-text-muted);
  border-radius: 50%;
  animation: scroll-bounce 2s ease-in-out infinite;
  opacity: 0.5;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50%       { transform: translateY(8px); opacity: 0.2; }
}

/* ----------------------------------------------------------------
   8. VALUE STRIP SECTION
---------------------------------------------------------------- */
.value-strip-section {
  padding: var(--space-20) 0;
  background: var(--colour-bg-secondary);
  border-top: 1px solid var(--colour-border);
  border-bottom: 1px solid var(--colour-border);
}

.value-strip-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}

.value-card {
  padding: var(--space-6);
  border-radius: var(--border-radius);
  border: 1px solid var(--colour-border);
  background: var(--colour-bg-card);
  text-align: center;
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base), box-shadow var(--transition-base);
}

.value-card:hover {
  border-color: var(--colour-border-hover);
  background: var(--colour-bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--space-4);
  color: var(--colour-accent);
}

.value-icon svg {
  width: 100%;
  height: 100%;
}

.value-card h3 {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--colour-white);
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.value-card p {
  font-size: var(--fs-xs);
  color: var(--colour-text-muted);
  line-height: 1.6;
}

/* ----------------------------------------------------------------
   9. SERVICES SECTION
---------------------------------------------------------------- */
.services-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  padding: var(--space-8);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--colour-border);
  background: var(--colour-bg-card);
  position: relative;
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  border-color: rgba(79, 142, 247, 0.3);
  background: var(--colour-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(79, 142, 247, 0.1);
}

.service-number {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--colour-accent);
  opacity: 0.6;
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
}

.service-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-5);
  color: var(--colour-accent);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--colour-white);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.service-who {
  font-size: var(--fs-xs);
  color: var(--colour-accent);
  font-weight: 500;
  margin-bottom: var(--space-4);
  line-height: 1.4;
}

.service-card > p:not(.service-who) {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.service-outcomes {
  border-top: 1px solid var(--colour-border);
  padding-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-outcomes li {
  font-size: var(--fs-xs);
  color: var(--colour-text-subtle);
  padding-left: var(--space-4);
  position: relative;
}

.service-outcomes li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--colour-accent);
  opacity: 0.5;
}

/* ----------------------------------------------------------------
   10. PROCESS SECTION
---------------------------------------------------------------- */
.process-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg-secondary);
  border-top: 1px solid var(--colour-border);
  border-bottom: 1px solid var(--colour-border);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 100%;
  margin: 0 auto;
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-8);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius-lg);
  background: var(--colour-bg-card);
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base), box-shadow var(--transition-base);
}

.process-step:hover {
  border-color: rgba(79, 142, 247, 0.3);
  background: var(--colour-bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}

.process-connector {
  height: 1px;
  background: linear-gradient(90deg, var(--colour-accent) 0%, transparent 100%);
  opacity: 0.2;
  margin: 0 0 0 72px;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--colour-accent);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.step-content h3 {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--colour-white);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.step-content p {
  font-size: var(--fs-base);
  color: var(--colour-text-muted);
  line-height: 1.7;
}

/* ----------------------------------------------------------------
   11. CASE STUDIES SECTION
---------------------------------------------------------------- */
.case-studies-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg);
}

/* Base case study card */
.case-study {
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius-lg);
  background: var(--colour-bg-card);
  margin-bottom: var(--space-8);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.case-study:hover {
  border-color: var(--colour-border-hover);
  box-shadow: var(--shadow-lg);
}

/* Featured case study — GlazierOS */
.case-study--featured {
  border-color: rgba(79, 142, 247, 0.25);
  background: linear-gradient(135deg, var(--colour-bg-card) 0%, rgba(79, 142, 247, 0.04) 100%);
}

.case-study--featured:hover {
  border-color: rgba(79, 142, 247, 0.4);
}

/* Case study header */
.cs-header {
  padding: var(--space-10) var(--space-10) var(--space-6);
  border-bottom: 1px solid var(--colour-border);
}

.cs-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.cs-label {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: rgba(79, 142, 247, 0.15);
  border: 1px solid rgba(79, 142, 247, 0.3);
  border-radius: 100px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--colour-accent-light);
}

.cs-category {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--colour-text-subtle);
}

.cs-title {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--colour-white);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.cs-intro {
  font-size: var(--fs-md);
  color: var(--colour-text-muted);
  line-height: 1.7;
  max-width: 680px;
}

/* Case study body */
.cs-body {
  padding: var(--space-10);
}

.cs-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

.cs-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.cs-block h4 {
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--colour-accent);
  margin-bottom: var(--space-3);
}

.cs-block p {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  line-height: 1.75;
}

.cs-tech {
  padding: var(--space-5);
  background: rgba(79, 142, 247, 0.05);
  border: 1px solid rgba(79, 142, 247, 0.1);
  border-radius: var(--border-radius-sm);
}

/* Gallery */
.cs-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cs-gallery-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Image placeholders — styled dark boxes with filename label */
.img-placeholder {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius-sm);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  transition: border-color var(--transition-base), background var(--transition-base);
  position: relative;
  overflow: hidden;
}

.img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79, 142, 247, 0.03) 0%, transparent 60%);
}

.img-placeholder:hover {
  border-color: var(--colour-border-hover);
  background: rgba(255,255,255,0.05);
}

.img-placeholder span {
  font-size: var(--fs-xs);
  color: var(--colour-text-subtle);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  text-align: center;
  position: relative;
  z-index: 1;
}

.img-placeholder--small {
  aspect-ratio: 4 / 3;
}

/* Case study with single gallery column */
.cs-gallery--single {
  align-self: start;
}

.cs-gallery--single .img-placeholder {
  aspect-ratio: 4 / 3;
}

/* Real case study images */
.cs-image {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--colour-border);
  display: block;
  object-fit: cover;
}

.cs-image--small {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* Case study footer */
.cs-footer {
  padding: var(--space-6) var(--space-10);
  border-top: 1px solid var(--colour-border);
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

/* ----------------------------------------------------------------
   12. WHAT WE SOLVE SECTION
---------------------------------------------------------------- */
.solve-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg-secondary);
  border-top: 1px solid var(--colour-border);
  border-bottom: 1px solid var(--colour-border);
}

.solve-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.solve-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius);
  background: var(--colour-bg-card);
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base);
}

.solve-card:hover {
  border-color: rgba(79, 142, 247, 0.25);
  background: var(--colour-bg-card-hover);
  transform: translateX(3px);
}

.solve-icon {
  font-size: var(--fs-md);
  color: var(--colour-accent);
  flex-shrink: 0;
  font-weight: 700;
  margin-top: 2px;
}

.solve-card p {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  line-height: 1.6;
  font-style: italic;
}

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

.solve-cta p {
  font-size: var(--fs-md);
  color: var(--colour-text-muted);
  margin-bottom: var(--space-6);
}

/* ----------------------------------------------------------------
   13. CAPABILITIES SECTION
---------------------------------------------------------------- */
.capabilities-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.capability-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-6);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius);
  background: var(--colour-bg-card);
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base);
}

.capability-item:hover {
  border-color: var(--colour-border-hover);
  background: var(--colour-bg-card-hover);
  transform: translateY(-2px);
}

.cap-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  color: var(--colour-accent);
  margin-top: 2px;
}

.cap-icon svg {
  width: 100%;
  height: 100%;
}

.cap-text h4 {
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--colour-white);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

.cap-text p {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  line-height: 1.6;
}

/* ----------------------------------------------------------------
   14. CONTACT SECTION
---------------------------------------------------------------- */
.contact-section {
  padding: var(--space-32) 0;
  background: var(--colour-bg-secondary);
  border-top: 1px solid var(--colour-border);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-intro h2 {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--colour-white);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: var(--space-5);
}

.contact-intro p {
  font-size: var(--fs-md);
  color: var(--colour-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.contact-reassurance {
  font-size: var(--fs-sm) !important;
  color: var(--colour-text-subtle) !important;
  font-style: italic;
  border-left: 2px solid var(--colour-accent);
  padding-left: var(--space-4);
  margin-bottom: var(--space-8) !important;
}

.contact-details {
  margin-top: var(--space-8);
}

.contact-email {
  font-size: var(--fs-sm);
  color: var(--colour-accent);
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.contact-email:hover {
  color: var(--colour-accent-light);
}

/* Contact form */
.contact-form-wrap {
  background: var(--colour-bg-card);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-10);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--colour-text);
}

.required {
  color: var(--colour-accent);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius-sm);
  color: var(--colour-text);
  font-size: var(--fs-sm);
  line-height: 1.5;
  transition: border-color var(--transition-fast), background var(--transition-fast),
              box-shadow var(--transition-fast);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--colour-accent);
  background: rgba(79, 142, 247, 0.05);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--colour-text-subtle);
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238892a4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group select option {
  background: var(--colour-bg-card);
  color: var(--colour-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

/* Field validation errors */
.field-error {
  font-size: var(--fs-xs);
  color: #f87171;
  min-height: 1rem;
  display: block;
}

/* Input invalid state */
.form-group input.is-invalid,
.form-group textarea.is-invalid,
.form-group select.is-invalid {
  border-color: #f87171;
}

/* Submit button */
.btn-submit {
  width: 100%;
  padding: 0.875rem;
  font-size: var(--fs-base);
  margin-top: var(--space-2);
}

.btn-submit .btn-loading {
  display: none;
}

.btn-submit.is-loading .btn-text {
  display: none;
}

.btn-submit.is-loading .btn-loading {
  display: inline;
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Form status messages */
.form-status {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--border-radius-sm);
  font-size: var(--fs-sm);
}

.form-status svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.form-status strong {
  display: block;
  font-size: var(--fs-base);
  margin-bottom: var(--space-1);
}

.form-status p {
  color: inherit;
  opacity: 0.85;
  font-size: var(--fs-sm);
}

.form-status--success {
  background: rgba(61, 220, 132, 0.08);
  border: 1px solid rgba(61, 220, 132, 0.25);
  color: var(--colour-green);
}

.form-status--error {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  color: #f87171;
}

.form-status--error a {
  color: inherit;
  text-decoration: underline;
}

/* Thank you state — replaces form after successful submit */
.form-thankyou {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-8);
  min-height: 300px;
}

.form-thankyou svg {
  margin-bottom: var(--space-6);
}

.form-thankyou h3 {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--colour-white);
  margin-bottom: var(--space-4);
}

.form-thankyou p {
  font-size: var(--fs-md);
  color: var(--colour-text-muted);
  line-height: 1.7;
  max-width: 400px;
}

/* ----------------------------------------------------------------
   15. FOOTER
---------------------------------------------------------------- */
.site-footer {
  padding: var(--space-20) 0 var(--space-10);
  background: var(--colour-bg);
  border-top: 1px solid var(--colour-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-logo {
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--colour-white);
  letter-spacing: -0.03em;
  display: inline-block;
  margin-bottom: var(--space-4);
}

.footer-logo:hover {
  color: var(--colour-white);
}

.footer-tagline {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  line-height: 1.7;
  max-width: 300px;
  margin-bottom: var(--space-4);
}

.footer-contact-email a {
  font-size: var(--fs-sm);
  color: var(--colour-accent);
  font-family: var(--font-mono);
}

.footer-contact-email a:hover {
  color: var(--colour-accent-light);
}

.site-footer h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--colour-text-subtle);
  margin-bottom: var(--space-5);
}

.footer-nav ul,
.footer-services ul,
.footer-connect ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav li a,
.footer-connect li a {
  font-size: var(--fs-sm);
  color: var(--colour-text-muted);
  transition: color var(--transition-fast);
}

.footer-nav li a:hover,
.footer-connect li a:hover {
  color: var(--colour-white);
}

.footer-services li {
  font-size: var(--fs-sm);
  color: var(--colour-text-subtle);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--colour-border);
}

.footer-domain {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  color: var(--colour-text-subtle);
}

.footer-copy {
  font-size: var(--fs-xs);
  color: var(--colour-text-subtle);
}

/* ----------------------------------------------------------------
   16. MOBILE NAVIGATION OVERLAY
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 11, 14, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    z-index: 999;
    padding: var(--space-8);
  }

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

  .nav-link {
    font-size: var(--fs-xl);
    padding: var(--space-3) var(--space-6);
    width: 100%;
    text-align: center;
  }

  .nav-link.nav-cta {
    margin-left: 0;
    margin-top: var(--space-2);
  }
}

/* ----------------------------------------------------------------
   17. RESPONSIVE — TABLET (max-width: 1024px)
---------------------------------------------------------------- */
@media (max-width: 1024px) {
  .value-strip-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .value-strip-grid .value-card:nth-child(4),
  .value-strip-grid .value-card:nth-child(5) {
    grid-column: span 1;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-columns {
    grid-template-columns: 1fr;
  }

  .cs-gallery {
    order: -1;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ----------------------------------------------------------------
   18. RESPONSIVE — MOBILE (max-width: 768px)
---------------------------------------------------------------- */
@media (max-width: 768px) {
  .hero-headline {
    font-size: var(--fs-4xl);
  }

  .hero-subheading {
    font-size: var(--fs-base);
  }

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

  .section-header h2 {
    font-size: var(--fs-2xl);
  }

  .value-strip-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .value-strip-grid .value-card:last-child {
    grid-column: 1 / -1;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .step-number {
    width: 44px;
    height: 44px;
  }

  .cs-header {
    padding: var(--space-6);
  }

  .cs-body {
    padding: var(--space-6);
  }

  .cs-footer {
    padding: var(--space-5) var(--space-6);
  }

  .cs-title {
    font-size: var(--fs-2xl);
  }

  .solve-grid {
    grid-template-columns: 1fr;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrap {
    padding: var(--space-6);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

/* ----------------------------------------------------------------
   19. RESPONSIVE — SMALL MOBILE (max-width: 480px)
---------------------------------------------------------------- */
@media (max-width: 480px) {
  :root {
    --nav-height: 64px;
  }

  .container {
    padding: 0 var(--space-4);
  }

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

  .hero-headline {
    font-size: var(--fs-3xl);
  }

  .hero-cta-group .btn {
    width: 100%;
    max-width: 280px;
  }

  .value-strip-grid {
    grid-template-columns: 1fr;
  }

  .value-strip-grid .value-card:last-child {
    grid-column: auto;
  }

  .cs-gallery-row {
    grid-template-columns: 1fr;
  }

  .cs-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ----------------------------------------------------------------
   20. ACCESSIBILITY & FOCUS STYLES
---------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--colour-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal-up {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ----------------------------------------------------------------
   21. PRINT STYLES
---------------------------------------------------------------- */
@media print {
  .site-header,
  .hero-particles,
  .hero-bg-gradient,
  .hero-scroll-indicator,
  .hamburger,
  .nav-cta,
  .contact-form-wrap,
  .site-footer .footer-connect {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}

/* ----------------------------------------------------------------
   22. HERO CREDIBILITY LINE
---------------------------------------------------------------- */
.hero-credibility {
  margin-top: var(--space-6);
  font-size: var(--fs-sm);
  color: var(--colour-text-subtle);
  letter-spacing: 0.01em;
}

/* ----------------------------------------------------------------
   23. PROCESS SECTION CANVAS
   Canvas is positioned absolutely behind the process steps.
---------------------------------------------------------------- */
.process-section {
  position: relative;
  overflow: hidden;
}

.process-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
  z-index: 0;
}

/* Ensure process content sits above canvas */
.process-section .container {
  position: relative;
  z-index: 1;
}

/* ----------------------------------------------------------------
   24. CAPABILITIES SHOWCASE — 3-panel interactive layout
---------------------------------------------------------------- */

/* Outer wrapper: left cards | centre preview | right cards */
.capabilities-showcase {
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

/* Each side is a 2x2 grid of cards */
.cap-cards-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Individual capability card */
.cap-card {
  padding: var(--space-5);
  border: 1px solid var(--colour-border);
  border-radius: var(--border-radius);
  background: var(--colour-bg-card);
  cursor: pointer;
  transition: border-color var(--transition-base), background var(--transition-base),
              transform var(--transition-base), box-shadow var(--transition-base);
  outline: none;
}

.cap-card:hover,
.cap-card:focus-visible,
.cap-card.is-active {
  border-color: rgba(79, 142, 247, 0.4);
  background: var(--colour-bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.cap-card.is-active {
  box-shadow: 0 0 0 2px rgba(79, 142, 247, 0.3), 0 4px 20px rgba(0,0,0,0.3);
}

.cap-card-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  min-height: 28px;
  max-width: 28px;
  max-height: 28px;
  color: var(--colour-accent);
  margin-bottom: var(--space-3);
  overflow: hidden;
  flex-shrink: 0;
}

.cap-card-icon svg {
  width: 28px;
  height: 28px;
  max-width: 28px;
  max-height: 28px;
  display: block;
}

.cap-card h4 {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--colour-white);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.cap-card p {
  font-size: var(--fs-xs);
  color: var(--colour-text-muted);
  line-height: 1.55;
}

/* Centre preview panel */
.cap-preview-panel {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--colour-border);
  background: var(--colour-bg-card);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cap-preview-panel canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.cap-preview-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  color: var(--colour-text-subtle);
  letter-spacing: 0.04em;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

/* Hide hint once a card is active */
.capabilities-showcase.has-active .cap-preview-hint {
  opacity: 0;
  pointer-events: none;
}

/* Mobile hint — only shown below 900px */
.cap-mobile-hint {
  display: none;
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--colour-text-subtle);
  margin-top: var(--space-4);
}

/* ----------------------------------------------------------------
   25. RESPONSIVE — CAPABILITIES SHOWCASE
---------------------------------------------------------------- */
@media (max-width: 1100px) {
  .capabilities-showcase {
    grid-template-columns: 1fr 1.4fr 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 900px) {
  /* On tablet / mobile: hide centre panel, stack cards in 2 columns */
  .capabilities-showcase {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .cap-preview-panel {
    display: none;
  }

  .cap-cards-group {
    grid-template-columns: 1fr;
  }

  .cap-mobile-hint {
    display: block;
  }
}

@media (max-width: 600px) {
  .capabilities-showcase {
    grid-template-columns: 1fr;
  }
}