/* ============================================
   ASYMMETRY LABS — Editorial Design System
   Black & white, pencil-sketch, mechanical-drawing feel
   Instrument Serif + DM Sans
   ============================================ */

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

:root {
  --black: #111;
  --white: #fff;
  --gray-light: #f7f7f6;
  --gray-mid: #888;
  --gray-border: #e0e0e0;
  --gray-dark: #444;
  --max-width: 1200px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--black);
  text-decoration: none;
}

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

/* ============================================
   Typography
   ============================================ */

h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 5vw, 4.5rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.015em;
}

h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.25;
}

p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--gray-dark);
}

.label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-mid);
  margin-bottom: 1.5rem;
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 7rem 0;
}

section + section {
  border-top: 1px solid var(--gray-border);
}

/* ============================================
   Navigation
   ============================================ */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-border);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.nav-logo img {
  height: 22px;
  width: auto;
}

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

.nav-links a {
  font-size: 0.8125rem;
  color: var(--gray-mid);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--black);
}

.nav-links a.active {
  color: var(--black);
}

.nav-links a.btn-nav {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
  transition: all 0.2s;
}

.nav-links a.btn-nav:hover {
  background: transparent;
  color: var(--black);
}

/* Nav dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  cursor: pointer;
}

.nav-dropdown-toggle::after {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  margin-left: 5px;
  margin-bottom: 2px;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -1rem;
  padding: 0.75rem 0;
  background: var(--white);
  border: 1px solid var(--gray-border);
  list-style: none;
  min-width: 200px;
  z-index: 200;
}

.nav-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.nav-dropdown-menu li a {
  display: block;
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--gray-mid);
  transition: all 0.15s;
  white-space: nowrap;
}

.nav-dropdown-menu li a:hover,
.nav-dropdown-menu li a.active {
  color: var(--black);
  background: var(--gray-light);
}

.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--black);
  margin: 6px 0;
  transition: 0.3s;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--gray-border);
  }

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

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: 0;
  border-top: none;
  min-height: 100svh;
  display: flex;
  align-items: center;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding-top: 64px;
}

.hero-tagline {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--gray-mid);
  margin-bottom: 2rem;
}

.hero h1 {
  margin-bottom: 2rem;
}

.hero-body {
  font-size: 1.125rem;
  color: var(--gray-dark);
  max-width: 520px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

/* Hero Art */
.hero-art {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-illustration {
  width: 100%;
  max-width: 480px;
  height: auto;
  opacity: 0.9;
}

@media (max-width: 960px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-art {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 10rem 0 6rem;
  }
}

/* ============================================
   How We Work
   ============================================ */

.hww-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 4rem;
}

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

.hww-icon {
  width: 140px;
  height: 140px;
  margin: 0 auto 1.75rem;
}

.hww-step h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
}

.hww-step p {
  font-size: 0.9375rem;
  color: var(--gray-dark);
  line-height: 1.6;
}

.hww-cta {
  margin-top: 3.5rem;
  text-align: center;
}

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

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.8rem 1.75rem;
  border: 1px solid var(--black);
  background: transparent;
  color: var(--black);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.01em;
}

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

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

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

.btn .arrow {
  transition: transform 0.2s;
  font-size: 1em;
}

.btn:hover .arrow {
  transform: translateX(3px);
}

/* ============================================
   Three Scales
   ============================================ */

.scales {
  background: var(--gray-light);
}

.scales h2 {
  max-width: 600px;
  margin-bottom: 4rem;
}

.scales-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.scale-card {
  padding: 2.5rem 2rem;
  background: var(--white);
  border: 1px solid var(--gray-border);
  display: flex;
  flex-direction: column;
}

.scale-card-number {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--gray-mid);
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.scale-card h3 {
  margin-bottom: 1.25rem;
  color: var(--black);
}

.scale-description {
  font-size: 0.9375rem;
  color: var(--gray-dark);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.scale-case {
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-border);
  margin-top: auto;
  margin-bottom: 2rem;
}

.scale-case-label {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-mid);
  margin-bottom: 0.75rem;
}

.scale-case-text {
  font-size: 0.875rem;
  font-style: italic;
  color: #666;
  line-height: 1.65;
}

.scale-link {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--black);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.2s;
}

.scale-link:hover {
  gap: 0.75rem;
}

.scale-link .arrow {
  transition: transform 0.2s;
}

@media (max-width: 960px) {
  .scales-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  background: var(--black);
  color: var(--white);
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: 1.5rem;
  max-width: 560px;
}

.cta-section p {
  color: var(--gray-mid);
  max-width: 560px;
  margin-bottom: 2.5rem;
  font-size: 1.0625rem;
}

.cta-section .btn {
  border-color: var(--white);
  color: var(--white);
}

.cta-section .btn:hover {
  background: var(--white);
  color: var(--black);
}

/* ============================================
   Footer
   ============================================ */

footer {
  padding: 4rem 0 2.5rem;
  border-top: 1px solid var(--gray-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand .nav-logo {
  margin-bottom: 1rem;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--gray-mid);
  font-style: italic;
  font-family: var(--font-serif);
}

.footer-col-title {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-mid);
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.6rem;
}

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--gray-dark);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--black);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--gray-border);
}

.footer-bottom p {
  font-size: 0.75rem;
  color: var(--gray-mid);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
  }
}

/* ============================================
   Thesis / Point of View (inner pages)
   ============================================ */

.thesis {
  background: var(--gray-light);
}

.thesis h2 {
  max-width: 700px;
  margin-bottom: 3rem;
}

.thesis-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 900px;
}

.thesis-body p {
  font-size: 1rem;
}

@media (max-width: 768px) {
  .thesis-body {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ============================================
   Services (inner pages)
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-top: 4rem;
}

.service-card {
  padding-top: 2rem;
  border-top: 2px solid var(--black);
}

.service-number {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--gray-mid);
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
}

.service-card h3 {
  margin-bottom: 1.25rem;
}

.service-card p {
  font-size: 0.9375rem;
  color: #666;
}

.services-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 960px) {
  .services-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .services-grid,
  .services-grid-4 {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ============================================
   Flywheel (inner pages)
   ============================================ */

.flywheel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

.flywheel-step {
  padding: 2rem;
  border: 1px solid var(--gray-border);
  position: relative;
}

.flywheel-number {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--gray-mid);
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
}

.flywheel-step h3 {
  margin-bottom: 1rem;
}

.flywheel-step p {
  font-size: 0.9375rem;
  color: #666;
}

@media (max-width: 960px) {
  .flywheel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .flywheel-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Audience (inner pages)
   ============================================ */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-top: 4rem;
}

.audience-card h3 {
  margin-bottom: 1.25rem;
}

.audience-card p {
  font-size: 1rem;
  color: #555;
}

@media (max-width: 768px) {
  .audience-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

/* Audience Selector (inner pages) */

.audience-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 4rem;
}

.audience-selector-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 3rem;
  border: 2px solid var(--black);
  transition: all 0.2s;
}

.audience-selector-card:hover {
  background: var(--black);
  color: var(--white);
}

.audience-selector-card:hover h3,
.audience-selector-card:hover p {
  color: var(--white);
}

.audience-selector-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.audience-selector-content p {
  font-size: 0.9375rem;
  color: #555;
  line-height: 1.6;
}

.audience-selector-arrow {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-left: 2rem;
  transition: transform 0.2s;
}

.audience-selector-card:hover .audience-selector-arrow {
  transform: translateX(4px);
  color: var(--white);
}

@media (max-width: 768px) {
  .audience-selector {
    grid-template-columns: 1fr;
  }

  .audience-selector-card {
    padding: 2rem;
  }
}

/* ============================================
   Research Page
   ============================================ */

.page-header {
  padding: 9rem 0 4rem;
}

.page-header h1 {
  margin-bottom: 1.5rem;
}

.page-header p {
  max-width: 600px;
}

.research-list {
  padding-top: 0;
  border-top: none;
}

.research-categories {
  padding: 0;
  border-top: none;
}

.category-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-border);
}

.category-btn {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--gray-border);
  background: transparent;
  color: var(--gray-mid);
  cursor: pointer;
  transition: all 0.2s;
}

.category-btn:hover {
  border-color: var(--black);
  color: var(--black);
}

.category-btn.active {
  background: var(--black);
  border-color: var(--black);
  color: var(--white);
}

/* Featured Study */

.research-featured {
  padding-top: 4rem;
  border-top: none;
}

.featured-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 3rem;
  background: var(--gray-light);
  transition: background 0.2s;
}

.featured-card:hover {
  background: #eee;
}

.featured-content {
  max-width: 720px;
}

.featured-content .research-tag {
  margin-bottom: 1.5rem;
  display: inline-block;
}

.featured-content h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
}

.featured-content p {
  font-size: 1rem;
  color: #555;
  margin-bottom: 1.5rem;
}

.featured-meta {
  font-size: 0.8125rem;
  color: var(--gray-mid);
}

.featured-arrow {
  font-size: 1.5rem;
  padding-top: 0.5rem;
  transition: transform 0.2s;
}

.featured-card:hover .featured-arrow {
  transform: translateX(4px);
}

/* Research Items */

.research-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--gray-border);
  transition: padding-left 0.2s;
}

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

.research-item:hover {
  padding-left: 1rem;
}

.research-item-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.research-date {
  font-size: 0.8125rem;
  color: var(--gray-mid);
}

.research-title {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.research-excerpt {
  font-size: 0.9375rem;
  color: #666;
  line-height: 1.6;
}

.research-tag {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-mid);
  border: 1px solid var(--gray-border);
  padding: 0.25rem 0.75rem;
  white-space: nowrap;
}

/* Subscribe Form */

.subscribe-form {
  display: flex;
  gap: 0;
  margin-top: 0.5rem;
  max-width: 480px;
}

.subscribe-input {
  flex: 1;
  padding: 0.8rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-right: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--white);
  outline: none;
}

.subscribe-input::placeholder {
  color: var(--gray-mid);
}

.subscribe-input:focus {
  border-color: var(--white);
}

.research-coming-soon {
  text-align: center;
  padding: 6rem 0;
}

.research-coming-soon p {
  color: var(--gray-mid);
  font-size: 1.0625rem;
}

@media (max-width: 768px) {
  .research-item {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .featured-card {
    padding: 2rem;
    flex-direction: column;
  }

  .featured-arrow {
    display: none;
  }
}

/* ============================================
   Contact Page
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  margin-top: 4rem;
}

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

.form-group label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-mid);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 0;
  border: none;
  border-bottom: 1px solid var(--gray-border);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  background: transparent;
  color: var(--black);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--black);
}

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

.contact-info h3 {
  margin-bottom: 1rem;
}

.contact-info p {
  margin-bottom: 2rem;
}

.contact-email {
  font-size: 1.125rem;
  border-bottom: 1px solid var(--black);
  padding-bottom: 2px;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}