:root {
  /* ─── Premium Color System ─── */
  /* Backgrounds — Deep layered navy */
  --bg-deep: #080c14;
  --bg-elevated: #0f1623;
  --bg-gradient: linear-gradient(160deg, #080c14 0%, #0f1623 50%, #0a1018 100%);

  /* Surfaces — Frosted glass cards */
  --surface-color: rgba(16, 24, 40, 0.7);
  --surface-hover: rgba(20, 30, 48, 0.85);
  --surface-border: rgba(148, 163, 184, 0.08);
  --surface-border-hover: rgba(91, 163, 217, 0.2);

  /* Text — High-contrast hierarchy */
  --text-heading: #f1f5f9;
  --text-main: #e2e8f0;
  --text-muted: #8b95a5;

  /* Accent — Steel Blue (Hellblau) */
  --accent-primary: #5ba3d9;
  --accent-hover: #4a8fc4;
  --accent-subtle: rgba(91, 163, 217, 0.1);
  --accent-glow: rgba(91, 163, 217, 0.25);
  --accent-border: rgba(91, 163, 217, 0.15);

  /* Contrast Accent - Lichtgrün (RAL 6027) */
  --accent-tertiary: #84c3be;
  --accent-tertiary-hover: #6eb5b0;

  /* Legacy compat token */
  --metallic-silver: #cbd5e1;

  /* Section alternation */
  --section-alt: rgba(8, 12, 20, 0.5);
  --divider-color: rgba(91, 163, 217, 0.12);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* Subtle radial light source — breaks the flat navy feel */
  background-image: radial-gradient(
    ellipse 80% 50% at 50% 0%,
    rgba(91, 163, 217, 0.03) 0%,
    transparent 70%
  );
  background-repeat: no-repeat;
}

/* ─── Typography ─── */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-heading);
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
  margin-bottom: 1.5rem;
  color: var(--text-muted);
  font-size: 1.1rem;
}

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

a:hover {
  color: var(--text-heading);
}

/* ─── Layout Utilities ─── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  background: var(--section-alt);
  border-top: 1px solid var(--divider-color);
  border-bottom: 1px solid var(--divider-color);
}

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

/* Section header spacing (used via class on wrapper divs) */
.section-header {
  margin-bottom: 4rem;
}

/* ─── Accent Line ─── */
.accent-line {
  display: block;
  width: 48px;
  height: 2px;
  background: var(--accent-primary);
  margin-bottom: 1.5rem;
  border-radius: 1px;
}

.text-center .accent-line {
  margin-left: auto;
  margin-right: auto;
}

/* ─── Buttons ─── */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-deep);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg-deep);
  box-shadow: 0 4px 30px rgba(91, 163, 217, 0.4);
  transform: translateY(-2px);
}


.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--accent-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-primary);
  color: var(--text-heading);
}

.btn-full {
  width: 100%;
}

/* ─── Header & Navigation ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--surface-border);
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: 1px;
}

.logo a {
  color: inherit;
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-primary);
}

/* Nav CTA button overrides */
.nav-links .btn-primary {
  color: var(--bg-deep);
}
.nav-links .btn-primary:hover {
  color: var(--bg-deep);
}

.lang-switch {
  display: flex;
  gap: 0.5rem;
  border-left: 1px solid var(--surface-border);
  padding-left: 1rem;
}

.lang-switch a {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.lang-switch a.active {
  color: var(--text-heading);
  font-weight: 700;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ─── Hero Section ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: url('../assets/images/hero-bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(8, 12, 20, 0.3) 0%,
    rgba(8, 12, 20, 0.6) 60%,
    var(--bg-deep) 100%
  );
}

.hero-content {
  max-width: 800px;
}

.subtitle {
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  font-size: 0.9rem;
  display: block;
  margin-bottom: 1rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

/* ─── Glass Card ─── */
.glass-card {
  background: var(--surface-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  padding: 2.5rem;
  transition: var(--transition);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--surface-border-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--surface-border-hover);
  background: var(--surface-hover);
}

/* ─── Grid Layouts ─── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  align-items: center;
}

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

/* ─── Check List (replaces inline ✓ items) ─── */
.check-list {
  list-style: none;
  color: var(--text-muted);
  margin-top: 1.5rem;
}

.check-list li {
  margin-bottom: 0.6rem;
  padding-left: 1.6rem;
  position: relative;
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 6px var(--accent-glow);
}

/* ─── Tag Badges (competencies flex container) ─── */
.tag-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* ─── Services / Packages ─── */
.service-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.package-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.package-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--divider-color);
}

.package-features {
  flex-grow: 1;
  margin-bottom: 2rem;
}

.package-features .check-list {
  margin-top: 0;
}

.package-features .check-list li {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.8rem;
}

.package-cta {
  margin-top: auto;
}

/* ─── Case Studies ─── */
.case-study {
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  margin-bottom: 3rem;
  transition: var(--transition);
}

.case-study:hover {
  border-color: var(--surface-border-hover);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.case-study .grid-2 {
  gap: 0;
}

.case-study:nth-child(even) .grid-2 {
  direction: rtl;
}
.case-study:nth-child(even) .case-content {
  direction: ltr;
}

.case-image {
  width: 100%;
  height: 100%;
  min-height: 400px;
  object-fit: cover;
  border-right: 1px solid var(--surface-border);
}

.case-study:nth-child(even) .case-image {
  border-right: none;
  border-left: 1px solid var(--surface-border);
}

.case-content {
  padding: 3rem;
}

.case-metric {
  display: inline-block;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-weight: 600;
  margin-top: 1.5rem;
  border: 1px solid var(--accent-border);
  font-size: 0.9rem;
}

/* ─── Contact ─── */
.contact-info {
  margin-top: 3rem;
}

.contact-label {
  color: var(--metallic-silver);
  font-weight: 600;
  margin-bottom: 0;
}

.contact-email {
  font-size: 1.2rem;
  display: block;
  margin-top: 0.5rem;
}

/* ─── Form ─── */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--metallic-silver);
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(8, 12, 20, 0.6);
  border: 1px solid var(--surface-border);
  border-radius: 4px;
  color: var(--text-main);
  font-family: var(--font-family);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* ─── Checkbox ─── */
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  background-color: rgba(8, 12, 20, 0.6);
  margin: 0;
  font: inherit;
  color: currentColor;
  width: 1.15em;
  height: 1.15em;
  border: 1px solid var(--surface-border);
  border-radius: 3px;
  display: grid;
  place-content: center;
  margin-top: 0.15rem;
  cursor: pointer;
  transition: var(--transition);
}

.form-checkbox input[type="checkbox"]::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
  transform: scale(0);
  background-color: var(--bg-deep);
  transition: 120ms transform ease-in-out;
}

.form-checkbox input[type="checkbox"]:checked {
  background-color: var(--accent-tertiary);
  border-color: var(--accent-tertiary);
}

.form-checkbox input[type="checkbox"]:checked::before {
  transform: scale(1);
}

.form-checkbox label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0;
  line-height: 1.4;
  cursor: pointer;
}

.form-checkbox label a {
  color: var(--accent-tertiary);
  text-decoration: underline;
}

.form-checkbox label a:hover {
  color: var(--accent-tertiary-hover);
}

/* ─── Contact Card Tertiary ─── */
.contact-card-tertiary {
  background: linear-gradient(145deg, rgba(40, 52, 70, 0.85), rgba(132, 195, 190, 0.1));
  border: 1px solid rgba(132, 195, 190, 0.2);
  box-shadow: 0 4px 24px rgba(132, 195, 190, 0.05);
  color: var(--text-main);
}

.contact-card-tertiary:hover {
  border-color: rgba(132, 195, 190, 0.4);
  box-shadow: 0 12px 40px rgba(132, 195, 190, 0.1), 0 0 0 1px rgba(132, 195, 190, 0.2);
  background: linear-gradient(145deg, rgba(50, 65, 85, 0.9), rgba(132, 195, 190, 0.15));
}

.contact-card-tertiary .form-group label {
  color: var(--text-heading);
}

.contact-card-tertiary .form-control {
  background: rgba(8, 12, 20, 0.6);
  border-color: rgba(132, 195, 190, 0.15);
  color: var(--text-main);
}

.contact-card-tertiary .form-control:focus {
  border-color: var(--accent-tertiary);
  box-shadow: 0 0 0 2px rgba(132, 195, 190, 0.2);
}

.contact-card-tertiary .form-checkbox label {
  color: var(--text-muted);
}

.contact-card-tertiary .form-checkbox label a {
  color: var(--accent-tertiary);
}

.contact-card-tertiary .form-checkbox label a:hover {
  color: var(--accent-tertiary-hover);
}

.contact-card-tertiary .form-checkbox input[type="checkbox"] {
  background-color: rgba(8, 12, 20, 0.6);
  border-color: rgba(132, 195, 190, 0.3);
}

.contact-card-tertiary .form-checkbox input[type="checkbox"]:checked {
  background-color: var(--accent-tertiary);
  border-color: var(--accent-tertiary);
}

.contact-card-tertiary .form-checkbox input[type="checkbox"]::before {
  background-color: var(--bg-deep);
}

/* ─── Footer ─── */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--divider-color);
  padding: 3rem 0;
  background: rgba(8, 12, 20, 0.9);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-copy {
  margin: 0;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

/* ─── Stats ─── */
.stat-item {
  padding: 2rem;
}
.stat-number-wrapper {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: center;
  align-items: baseline;
}
.stat-number {
  font-variant-numeric: tabular-nums;
}
.stat-plus {
  font-size: 2.5rem;
  color: var(--accent-hover);
  margin-left: 2px;
}
.stat-label {
  color: var(--text-muted);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ─── Timeline ─── */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--surface-border);
}
.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 1.5rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent-primary);
  transform: translateX(-50%);
  box-shadow: 0 0 10px var(--accent-glow);
  z-index: 1;
}
.timeline-date {
  display: inline-block;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  letter-spacing: 1px;
}
.timeline-content {
  padding: 2rem;
}
.timeline-content h3 {
  margin-bottom: 0.5rem;
}

/* ─── Skills ─── */
.skills-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.skill-name {
  font-weight: 600;
  color: var(--text-heading);
}
.skill-bar {
  width: 100%;
  height: 8px;
  background: var(--surface-border);
  border-radius: 4px;
  overflow: hidden;
}
.skill-progress {
  height: 100%;
  background: var(--accent-primary);
  width: 0;
  transition: width 1.5s cubic-bezier(0.1, 0.5, 0.1, 1);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ─── Industries / Branchen Grid ─── */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.industry-card {
  text-align: center;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.industry-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}
.industry-count {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--accent-primary);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  margin-bottom: 0.75rem;
}
.industry-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}
.industry-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
  flex-grow: 1;
}
.industry-companies {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-top: auto;
}
.industry-companies span {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(91, 163, 217, 0.06);
  border: 1px solid var(--accent-border);
  color: var(--metallic-silver);
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* ─── Referenzen / Experience Grid ─── */
.ref-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 3rem;
}
.ref-filter-btn {
  background: var(--surface-color);
  color: var(--text-muted);
  border: 1px solid var(--surface-border);
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.3px;
}
.ref-filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-heading);
  background: var(--accent-subtle);
}
.ref-filter-btn.active {
  background: var(--accent-primary);
  color: var(--bg-deep);
  border-color: var(--accent-primary);
  box-shadow: 0 0 14px var(--accent-glow);
}

.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.ref-card {
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  padding: 1.8rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.ref-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.ref-card:hover {
  transform: translateY(-4px);
  border-color: var(--surface-border-hover);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  background: var(--surface-hover);
}
.ref-card:hover::before { opacity: 1; }

.ref-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.ref-date {
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.5px;
  flex-shrink: 0;
  padding: 0.2rem 0.6rem;
  background: var(--accent-subtle);
  border-radius: 4px;
  border: 1px solid var(--accent-border);
}
.ref-industry {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 500;
}

.ref-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
  line-height: 1.35;
}
.ref-company {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  display: block;
}
.ref-location {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.ref-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
  flex-grow: 1;
}
.ref-desc p { font-size: 0.9rem; margin-bottom: 0.4rem; }
.ref-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}
.ref-tech-tag {
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: rgba(91, 163, 217, 0.06);
  border: 1px solid var(--accent-border);
  color: var(--metallic-silver);
  font-weight: 500;
  letter-spacing: 0.3px;
}

.ref-card.is-hidden {
  display: none;
}

/* counter badge */
.ref-counter {
  text-align: center;
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.ref-counter strong {
  color: var(--accent-primary);
}

/* ─── Animations ─── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Stagger delays */
.fade-delay-1 { transition-delay: 0.1s; }
.fade-delay-2 { transition-delay: 0.2s; }
.fade-delay-3 { transition-delay: 0.3s; }

/* ─── Responsive ─── */
@media (max-width: 992px) {
  .grid-2 { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .ref-grid { grid-template-columns: repeat(2, 1fr); }
  .case-study:nth-child(even) .grid-2 { direction: ltr; }
  .case-image {
    border-right: none;
    border-bottom: 1px solid var(--surface-border);
    min-height: 300px;
  }
  .case-study:nth-child(even) .case-image { border-left: none; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  .grid-3 { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .ref-grid { grid-template-columns: 1fr; }
  .ref-filters { gap: 0.4rem; }
  .ref-filter-btn { font-size: 0.78rem; padding: 0.4rem 0.9rem; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(8, 12, 20, 0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--surface-border);
  }
  .nav-links.active { display: flex; }
  .mobile-menu-btn { display: block; }
  .hero-actions { flex-direction: column; }
}