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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-text: #0a0a0f;
  --color-text-secondary: #4a4a55;
  --color-text-muted: #8a8a95;
  --color-border: #e5e7eb;
  --color-accent: #0a0a0f;
  --color-accent-hover: #2d2d3a;
  --color-highlight: #4f46e5;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.7;
}

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

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

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

main {
  min-height: calc(100vh - var(--header-height) - 320px);
}

section {
  padding: 80px 0;
}

@media (max-width: 768px) {
  section {
    padding: 56px 0;
  }
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

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

.lead {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 720px;
}

@media (max-width: 768px) {
  .lead {
    font-size: 1.125rem;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-highlight);
  margin-bottom: 16px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

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

/* ===== Burger Menu ===== */
.burger {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  z-index: 200;
  position: relative;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.burger.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.burger.is-open span:nth-child(2) {
  opacity: 0;
}

.burger.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Fullscreen Menu ===== */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 40px;
  overflow-y: auto;
}

.fullscreen-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
  width: 100%;
  max-width: 600px;
}

.menu-nav a {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  padding: 12px 0;
  display: block;
  transition: color var(--transition), transform var(--transition);
}

.menu-nav a:hover {
  color: var(--color-highlight);
  opacity: 1;
  transform: translateX(4px);
}

.menu-footer {
  margin-top: 48px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

body.menu-open {
  overflow: hidden;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-alt);
  opacity: 1;
}

.btn-arrow::after {
  content: '→';
  transition: transform var(--transition);
}

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

/* ===== Hero ===== */
.hero {
  padding: 120px 0 100px;
  text-align: left;
}

.hero-content {
  max-width: 880px;
}

.hero h1 {
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero {
    padding: 64px 0 56px;
  }
}

/* ===== Page Hero ===== */
.page-hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .page-hero {
    padding: 48px 0 40px;
  }
}

/* ===== Grids & Cards ===== */
.grid {
  display: grid;
  gap: 24px;
}

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

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

@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.card h3 {
  margin-bottom: 12px;
}

.card p {
  font-size: 1rem;
}

/* ===== Section Headers ===== */
.section-header {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-header h2 {
  margin-bottom: 16px;
}

/* ===== About Page ===== */
.content-block {
  max-width: 760px;
  margin: 0 auto;
}

.content-block h2 {
  margin: 48px 0 16px;
}

.content-block h3 {
  margin: 32px 0 12px;
}

.content-block p {
  margin-bottom: 16px;
}

.content-block ul {
  margin: 16px 0 24px 24px;
  color: var(--color-text-secondary);
}

.content-block li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.content-block strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 56px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin: 56px 0;
}

.stat-value {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* ===== Tech Stack ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.tech-item {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  font-weight: 500;
  transition: all var(--transition);
}

.tech-item:hover {
  background-color: var(--color-bg);
  border-color: var(--color-highlight);
  transform: translateY(-2px);
}

.tech-category {
  margin: 48px 0 16px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ===== Careers ===== */
.job-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.job-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 32px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  transition: all var(--transition);
  gap: 24px;
  flex-wrap: wrap;
}

.job-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.job-info h3 {
  margin-bottom: 6px;
}

.job-meta {
  display: flex;
  gap: 16px;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  flex-wrap: wrap;
}

.job-tag {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--color-bg-alt);
  border-radius: 6px;
  font-size: 0.8125rem;
}

/* ===== Contact Form ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

@media (max-width: 860px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.contact-info dl {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.contact-info dt {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.contact-info dd {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.6;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: inherit;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(10, 10, 15, 0.08);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* ===== News ===== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  transition: all var(--transition);
}

.news-item:hover {
  box-shadow: var(--shadow-md);
}

.news-date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.news-item h3 {
  margin-bottom: 12px;
}

/* ===== Policy Page ===== */
.policy-toc {
  background-color: var(--color-bg-alt);
  border-radius: 12px;
  padding: 24px 32px;
  margin: 32px 0;
}

.policy-toc h4 {
  margin-bottom: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.policy-toc ol {
  margin-left: 20px;
}

.policy-toc li {
  margin-bottom: 4px;
  color: var(--color-text-secondary);
}

.policy-toc a:hover {
  color: var(--color-highlight);
}

/* ===== CTA Section ===== */
.cta-section {
  background-color: var(--color-bg-alt);
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  margin: 40px 0;
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section .lead {
  margin: 0 auto 32px;
}

@media (max-width: 640px) {
  .cta-section {
    padding: 40px 24px;
  }
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.footer-col p,
.footer-col a {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul a:hover {
  color: var(--color-text);
  opacity: 1;
}

.legal-name {
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 4px;
}

.legal-details {
  font-size: 0.875rem;
  line-height: 1.7;
}

.legal-details span {
  display: block;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-bottom a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }

.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: 48px 0;
  border: none;
}