:root {
  --color-primary: #1a1a2e;
  --color-background: #faf9f7;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --font-heading: 'Georgia', serif;
  --font-body: 'Helvetica Neue', Arial, sans-serif;
  --spacing-section: 80px;
  --max-width: 1200px;
  --border-radius: 4px;
}

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

/* Base */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Container */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Section spacing */
section {
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

@media (max-width: 767px) {
  section {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

/* ===== Skip Link (T049) ===== */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 12px 24px;
  z-index: 200;
  transform: translateY(-100%);
  transition: transform 0.2s ease;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
}

/* ===== Focus Indicators (T050) ===== */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

#hero a:focus-visible,
#contact a:focus-visible,
.site-footer a:focus-visible {
  outline-color: #ffffff;
}

/* ===== Header / Nav (T017) ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-background);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding: 16px 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.logo:hover {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.nav-links a:hover {
  color: var(--color-primary);
  opacity: 1;
}

@media (max-width: 767px) {
  .site-header .container {
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
}

/* ===== Hero (T018) ===== */
#hero {
  padding-top: 0;
  padding-bottom: 0;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background-color: var(--color-primary);
  color: #ffffff;
}

#hero .container {
  position: relative;
  z-index: 2;
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

#hero img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  max-width: 700px;
}

#hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 16px;
  color: #ffffff;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-family: var(--font-heading);
  font-style: italic;
  margin-bottom: 24px;
  opacity: 0.9;
}

#hero .hero-content > p:not(.hero-tagline) {
  margin-bottom: 16px;
  line-height: 1.7;
  opacity: 0.85;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.2s ease, transform 0.1s ease;
  cursor: pointer;
}

.btn:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.btn-primary {
  background-color: #ffffff;
  color: var(--color-primary);
}

.btn-primary:hover {
  background-color: #f0f0f0;
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
}

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

/* ===== About (T019) ===== */
#about .container {
  max-width: 65ch;
}

#about h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 24px;
}

#about p {
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ===== Approach (T020) ===== */
#approach h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 16px;
}

.approach-intro {
  margin-bottom: 40px;
  max-width: 65ch;
}

.approach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.approach-card {
  background-color: var(--color-surface);
  padding: 32px;
  border-radius: var(--border-radius);
}

.approach-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.approach-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .approach-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .approach-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== Services (T021) ===== */
#services h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 40px;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.service-card {
  background-color: var(--color-surface);
  padding: 32px;
  border-radius: var(--border-radius);
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.service-card ul {
  list-style: none;
}

.service-card li {
  padding: 8px 0;
  padding-left: 16px;
  border-left: 2px solid var(--color-primary);
  color: var(--color-text-muted);
}

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

/* ===== Why Monolith (T022) ===== */
#why h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 32px;
}

.why-list {
  list-style: none;
  max-width: 65ch;
  margin-bottom: 32px;
}

.why-list li {
  padding: 12px 0;
  padding-left: 28px;
  position: relative;
  line-height: 1.6;
}

.why-list li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.why-closing {
  font-style: italic;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  max-width: 65ch;
  color: var(--color-text-muted);
}

/* ===== Working With Us (T023) ===== */
#working-with-us {
  text-align: center;
  background-color: var(--color-surface);
}

#working-with-us h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 24px;
}

#working-with-us p {
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ===== Contact (T028) ===== */
#contact {
  background-color: var(--color-primary);
  color: #ffffff;
  text-align: center;
}

#contact h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 24px;
  color: #ffffff;
}

#contact a[href^="mailto"]:not(.btn) {
  color: #ffffff;
  font-size: 1.25rem;
  text-decoration: none;
}

#contact a[href^="mailto"]:not(.btn):hover {
  text-decoration: underline;
  opacity: 1;
}

.contact-email-text {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-top: 4px;
  margin-bottom: 16px;
}

#contact p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

#contact .btn-primary {
  background-color: #ffffff;
  color: var(--color-primary);
  display: inline-block;
  margin-bottom: 24px;
}

#contact .btn-primary:hover {
  background-color: #f0f0f0;
}

.privacy-notice {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}

.privacy-notice a {
  color: rgba(255, 255, 255, 0.7);
}

.privacy-notice a:hover {
  color: #ffffff;
  opacity: 1;
}

/* ===== Footer (T029) ===== */
.site-footer {
  background-color: #111111;
  color: rgba(255, 255, 255, 0.5);
  padding: 32px 0;
  font-size: 0.85rem;
  text-align: center;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
}

.site-footer a:hover {
  color: #ffffff;
  opacity: 1;
}

/* ===== Privacy Policy Page (T037) ===== */
.privacy-policy .container {
  max-width: 75ch;
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

.back-link {
  display: inline-block;
  margin-bottom: 32px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.back-link:hover {
  color: var(--color-primary);
  opacity: 1;
}

.privacy-policy h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 8px;
}

.privacy-updated {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 48px;
}

.privacy-policy section {
  padding-top: 0;
  padding-bottom: 0;
  margin-bottom: 40px;
}

.privacy-policy h2 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.privacy-policy p {
  line-height: 1.8;
  margin-bottom: 12px;
}

.privacy-policy ul {
  margin-bottom: 12px;
  padding-left: 24px;
}

.privacy-policy li {
  line-height: 1.8;
  margin-bottom: 4px;
}