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

:root {
  /* Monochromatic Palette */
  --black: #0a0a0a;
  --gray-900: #171717;
  --gray-800: #262626;
  --gray-700: #404040;
  --gray-600: #525252;
  --gray-500: #737373;
  --gray-400: #a3a3a3;
  --gray-300: #d4d4d4;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --white: #ffffff;
  
  /* Semantic Colors */
  --background: var(--white);
  --foreground: var(--black);
  --muted: var(--gray-500);
  --border: var(--gray-200);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --container-max: 1280px;
  --section-padding: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--foreground);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

address {
  font-style: normal;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-balance {
  text-wrap: balance;
}

.text-pretty {
  text-wrap: pretty;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav.scrolled .nav-link,
.nav.scrolled .logo-text,
.nav.scrolled .logo-subtext {
  color: var(--foreground);
}

.nav.scrolled .hamburger-line {
  background: var(--foreground);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--white);
  transition: color 0.3s ease;
}

.logo-subtext {
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.nav.scrolled .logo-subtext {
  color: var(--muted);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s ease;
}

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

.nav.scrolled .nav-link:hover {
  color: var(--black);
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
}

.hamburger-line {
  width: 24px;
  height: 1.5px;
  background: var(--white);
  transition: all 0.3s ease;
}

.mobile-menu-btn.active .hamburger-line:first-child {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active .hamburger-line:last-child {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 99;
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.mobile-link {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.05em;
  transition: opacity 0.3s ease;
}

.mobile-link:hover {
  opacity: 0.6;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .mobile-menu-btn {
    display: none;
  }
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 10, 0.7) 0%,
    rgba(10, 10, 10, 0.5) 50%,
    rgba(10, 10, 10, 0.8) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 0 1.5rem;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  margin-bottom: 2rem;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white);
}

.badge-separator {
  opacity: 0.4;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 0.9rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.5), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--white);
  color: var(--black);
}

.btn-primary:hover {
  background: var(--gray-200);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-dark {
  background: var(--black);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--gray-800);
}

.btn-submit {
  width: 100%;
  background: var(--white);
  color: var(--black);
}

.btn-submit:hover {
  background: var(--gray-200);
}

/* ===== Section Styles ===== */
.section-label {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

.section-label-dark {
  color: var(--gray-400);
}

.section-label-light {
  color: rgba(255, 255, 255, 0.5);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--foreground);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-title-dark {
  color: var(--white);
}

.section-title-light {
  color: var(--white);
}

.section-desc {
  font-size: 0.85rem;
  color: var(--muted);
  max-width: 500px;
  line-height: 1.7;
}

.section-desc-dark {
  color: var(--gray-400);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ===== About Section ===== */
.about {
  padding: var(--section-padding) 0;
  background: var(--gray-100);
}

.about-grid {
  display: grid;
  gap: 4rem;
}

@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
  }
}

.about-text {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

.stat-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: 2px;
}

.stat-card-full {
  grid-column: span 2;
}

.stat-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--foreground);
  line-height: 1;
}

.stat-desc {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.stat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.stat-tag {
  padding: 0.375rem 0.75rem;
  background: var(--gray-100);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: 2px;
}

/* ===== Portfolios Section ===== */
.portfolios {
  padding: var(--section-padding) 0;
}

.portfolio-card {
  display: grid;
  gap: 2rem;
  margin-bottom: 4rem;
}

.portfolio-card:last-child {
  margin-bottom: 0;
}

@media (min-width: 1024px) {
  .portfolio-card {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
  }
  
  .portfolio-card-reverse .portfolio-image {
    order: 2;
  }
}

.portfolio-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: 2px;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.5s ease, transform 0.5s ease;
}

.portfolio-image:hover img {
  filter: grayscale(0%);
  transform: scale(1.02);
}

.portfolio-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.portfolio-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--foreground);
  margin-bottom: 1rem;
}

.portfolio-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.portfolio-list {
  margin-bottom: 2rem;
}

.portfolio-list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-bottom: 0.5rem;
}

.portfolio-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 4px;
  height: 1px;
  background: var(--gray-400);
}

.portfolio-services {
  margin-bottom: 2rem;
}

.portfolio-umbrella {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--foreground);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.portfolio-services .portfolio-list {
  margin-bottom: 0;
  padding-left: 0.5rem;
  border-left: 1px solid var(--gray-300);
}

/* ===== Methodology Section ===== */
.methodology {
  padding: var(--section-padding) 0;
  background: var(--gray-900);
}

.methodology-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .methodology-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.method-card {
  background: var(--gray-800);
  padding: 2rem;
  border-radius: 2px;
  transition: background 0.3s ease;
}

.method-card:hover {
  background: var(--gray-700);
}

.method-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.method-number {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
}

.method-line {
  flex: 1;
  height: 1px;
  background: var(--gray-600);
}

.method-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 1rem;
}

.method-desc {
  font-size: 0.8rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.method-list li {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.5rem;
}

/* ===== Contact Section ===== */
.contact {
  padding: var(--section-padding) 0;
  background: var(--black);
}

.contact-grid {
  display: grid;
  gap: 4rem;
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
  }
}

.contact-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 0.375rem;
}

.contact-item-value {
  font-size: 0.85rem;
  color: var(--white);
  transition: opacity 0.3s ease;
}

a.contact-item-value:hover {
  opacity: 0.7;
}

.contact-form-wrapper {
  background: var(--gray-900);
  padding: 2rem;
  border-radius: 2px;
}

@media (min-width: 640px) {
  .contact-form-wrapper {
    padding: 2.5rem;
  }
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--white);
  background: var(--gray-800);
  border: 1px solid var(--gray-700);
  border-radius: 2px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--gray-600);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gray-500);
  background: var(--gray-700);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23737373' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.form-select option {
  background: var(--gray-800);
  color: var(--white);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* ===== Footer ===== */
.footer {
  padding: 4rem 0 2rem;
  background: var(--gray-900);
  border-top: 1px solid var(--gray-800);
}

.footer-grid {
  display: grid;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
  }
}

.footer-logo {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}

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

.footer-logo .logo-subtext {
  color: var(--gray-500);
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.footer-contact-link {
  font-size: 0.75rem;
  color: var(--gray-500);
  transition: color 0.3s ease;
  word-break: break-all;
}

.footer-contact-link:hover {
  color: var(--white);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.social-link {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-600);
  transition: color 0.3s ease;
}

.social-link:hover {
  color: var(--white);
}

.footer-links-title {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 1.25rem;
}

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

.footer-link {
  font-size: 0.8rem;
  color: var(--gray-400);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-800);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-copyright {
  font-size: 0.7rem;
  color: var(--gray-600);
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background: var(--gray-800);
  border-radius: 2px;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.badge-icon {
  color: #22c55e;
}

/* ===== Utility ===== */
@media (max-width: 640px) {
  :root {
    --section-padding: 4rem;
  }
}