:root {
  --bg-color: #fafafa;
  --text-main: #111111;
  --text-muted: #666666;
  --accent-blue: rgb(41, 171, 226); /* Rugged Professionalism Blue */
  --border-color: #e5e5e5;
  --font-main: 'Work Sans', sans-serif;
  --grid-line: rgba(0, 0, 0, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  /* subtle blueprint background grid */
  background-image: 
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 5%;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

.utility-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  color: var(--text-muted);
  display: inline-block;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--text-main);
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--text-main);
  color: var(--bg-color);
}

.btn-primary:hover {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
}

.btn-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* ═══════════════════════════════ NAV ═══════════════════════════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--accent-blue);
  color: #fff;
  font-size: 0.8rem;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--accent-blue);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  transition: 0.3s;
}

/* ═══════════════════════════════ HERO ═══════════════════════════════ */
.hero {
  padding-top: 120px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 60px;
}

.hero-label {
  display: flex;
  gap: 1.5rem;
}

.hero-headline {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 1.5rem 0;
}

.hero-accent {
  font-style: italic;
  color: var(--accent-blue);
  font-weight: 300;
}

.hero-body-col {
  max-width: 500px;
}

.hero-body {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-image-strip {
  width: 100%;
  height: 400px;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.2);
  transition: filter 0.8s ease;
}

.hero-img:hover {
  filter: grayscale(0%) contrast(1.1);
}

/* ══════════════════════════ MARQUEE STRIP ═══════════════════════════ */
.marquee-strip {
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  overflow: hidden;
  white-space: nowrap;
  background: #fff;
}

.marquee-track {
  display: inline-block;
  animation: marquee 120s linear infinite;
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.marquee-track span {
  margin: 0 1.5rem;
}

.dot {
  color: var(--accent-blue);
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ═══════════════════════════ ABOUT STRIP ════════════════════════════ */
.about-strip {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-color);
  background: #fff;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 4rem;
}

.about-index {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.about-num {
  font-size: 3rem;
  font-family: var(--font-main);
  font-weight: 300;
  color: var(--border-color);
}

.about-statement {
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 4rem;
  letter-spacing: -0.02em;
}

.about-stats {
  display: flex;
  gap: 4rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--accent-blue);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
}

/* ════════════════════════════ PORTFOLIO ═════════════════════════════ */
.portfolio {
  padding: 80px 0;
  overflow: hidden; /* Prevent body scroll breaking */
}

.section-header {
  display: flex;
  gap: 4rem;
  margin-bottom: 60px;
}

.section-index {
  display: flex;
  flex-direction: column;
  min-width: 120px;
}

.section-subtext {
  max-width: 400px;
  color: var(--text-muted);
}

/* Slider Wrapper for Buttons */
.portfolio-slider-wrapper {
  position: relative;
  width: 100%;
}

.slider-btn {
  position: absolute;
  top: 45%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border-color); /* délicat outline */
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  color: var(--text-main);
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.slider-btn svg {
  width: 24px;
  height: 24px;
}

.slider-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.slider-prev {
  left: -28px;
}

.slider-next {
  right: -28px;
}

@media (max-width: 992px) {
  .slider-btn {
    display: none; /* Hide on mobile/tablet, rely on native swipe */
  }
}

/* Horizontal Native Scrolling Track */
.portfolio-horizontal {
  display: flex;
  gap: 1.5rem;
  width: 100%;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: 2rem; /* Buffer for hover effects and scrollbar if any */
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
}
.portfolio-horizontal::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.portfolio-card {
  border: 1px solid var(--border-color);
  background: #fff;
  transition: transform 0.4s ease, border-color 0.4s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  flex: 0 0 calc(40% - 1.5rem); /* Desktop: show 2.5 items to hint scrolling */
  height: 550px; /* Fixed concise height to prevent tall scrolling */
  scroll-snap-align: start;
}

/* Interactive Hover States */
.portfolio-horizontal:hover .portfolio-card {
  border-color: #eee;
}
.portfolio-horizontal .portfolio-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-4px);
  z-index: 2;
  box-shadow: 0 10px 40px rgba(0,0,0,0.05); /* Soft pop effect */
}

/* Tablet Layout */
@media (max-width: 992px) {
  .portfolio-card {
    flex: 0 0 calc(60% - 1.5rem); /* Hint scrolling */
  }
}

/* Mobile Layout */
@media (max-width: 600px) {
  .portfolio-card { 
    flex: 0 0 calc(90% - 1.5rem); /* Almost full width but snaps to edge */
    height: 450px; 
  }
}

.portfolio-card-img-wrap {
  flex-grow: 1; /* Automatically takes all extra height */
  position: relative;
  width: 100%;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.portfolio-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.portfolio-card:hover .portfolio-card-img {
  transform: scale(1.03);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(41, 171, 226, 0.9); /* Exact Accent blue */
  opacity: 0;
  transition: opacity 0.4s ease;
  display: flex;
  align-items: center;
  padding: 2rem;
}

.portfolio-card:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay-content {
  color: #fff;
}

.portfolio-overlay-content p {
  margin-top: 1rem;
  font-size: 0.875rem;
  line-height: 1.5;
}

.portfolio-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.portfolio-card-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.spec-badge {
  font-size: 0.6rem;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border-color);
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.portfolio-card-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.portfolio-card-year {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: auto;
  align-self: flex-start;
}

/* ═══════════════════════════ SERVICES ══════════════════════════════ */
.services {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
}

.services-list {
  border-top: 1px solid var(--border-color);
}

.service-item {
  display: grid;
  grid-template-columns: 80px 1fr 60px;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  transition: background-color 0.3s ease;
}

.service-item:hover {
  background-color: #fff;
}

.service-num {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.service-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 1rem;
}

.service-tags {
  display: flex;
  gap: 0.5rem;
}

.service-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  transition: all 0.3s ease;
  color: var(--text-main);
}

.service-arrow svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.service-item:hover .service-arrow {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.service-item:hover .service-arrow svg {
  transform: translate(2px, -2px);
}

/* ══════════════════════════ WORK WITH US ════════════════════════════ */
.contact {
  padding: 80px 0;
  background-color: var(--text-main);
  color: #fff;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-headline {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 400;
  line-height: 1;
  margin: 1.5rem 0;
  color: #fff;
}

.contact-subtext {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2rem;
  max-width: 400px;
}

.contact-info {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  display: flex;
  gap: 2rem;
}

.contact-info-item {
  font-size: 0.875rem;
  color: #fff;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding: 0.75rem 0;
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-bottom-color: var(--accent-blue);
}

.form-select option {
  color: #1a1a1a;
  background-color: #ffffff;
}

.form-input::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-textarea {
  resize: vertical;
}

.form-submit {
  background-color: var(--accent-blue);
  color: #fff;
  border: none;
  margin-top: 1rem;
}
.form-submit:hover {
  background-color: #fff;
  color: var(--accent-blue);
}

/* ═══════════════════════════ FOOTER ═══════════════════════════════════ */
.site-footer {
  background: var(--text-main);
  color: #fff;
  padding: 80px 0 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 60px;
}

.footer-logo {
  color: #fff;
  margin-bottom: 1rem;
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

.footer-group-label {
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 1.5rem;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
}

.footer-copy {
  color: rgba(255,255,255,0.4);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav-links, .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .about-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-stats {
    flex-wrap: wrap;
    gap: 2rem;
  }
  .section-header {
    flex-direction: column;
    gap: 1.5rem;
  }
  .contact-inner {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

/* ═══════════════════════════ LEGAL / PRIVACY ════════════════════════════ */
.legal-main {
  padding: 160px 0 80px;
  min-height: 80vh;
}

.legal-header {
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.legal-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1;
  text-transform: uppercase;
}

.legal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.legal-col h2 {
  font-size: 1rem;
  font-weight: 400;
  margin: 3rem 0 1rem;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.legal-col p, .legal-col li {
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

.legal-col ul {
  list-style: square inside;
  margin-left: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 600px) {
  .legal-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .legal-col:first-child {
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 3rem;
  }
}