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

:root {
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --border: #E2E2E6;
  --text: #334155;
  --text-secondary: #5C5C6E;
  --accent: #5E3ADB;
  --accent-hover: #7C5CFC;
  --accent-subtle: rgba(94, 58, 219, 0.06);
  --tag-border: rgba(94, 58, 219, 0.18);
  --nav-bg: rgba(250, 250, 250, 0.8);
  --nav-mobile-bg: rgba(250, 250, 250, 0.95);
  --hero-glow: rgba(94, 58, 219, 0.08);
  --availability-bg: rgba(22, 163, 74, 0.06);
  --availability-border: rgba(22, 163, 74, 0.2);
  --availability-color: #16A34A;
  --radius: 10px;
  --max-width: 1100px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
}

/*
 * Dark theme — duplicated for two cases:
 * 1. [data-theme="dark"] — user clicked the toggle
 * 2. prefers-color-scheme: dark — system preference (unless user chose light)
 * Keep both blocks in sync when changing colors.
 */
:root[data-theme="dark"] {
  --bg: #0b0920;
  --surface: #1e1b4b;
  --border: #2A2A30;
  --text: #EDEDEF;
  --text-secondary: #8A8A9A;
  --accent: #7C5CFC;
  --accent-hover: #9B7FFF;
  --accent-subtle: rgba(124, 92, 252, 0.08);
  --tag-border: rgba(124, 92, 252, 0.15);
  --nav-bg: rgba(7, 7, 19, 0.8);
  --nav-mobile-bg: rgba(8, 8, 23, 0.95);
  --hero-glow: rgba(124, 92, 252, 0.12);
  --availability-bg: rgba(52, 211, 153, 0.08);
  --availability-border: rgba(52, 211, 153, 0.2);
  --availability-color: #34D399;
  --shadow: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0920;
    --surface: #1e1b4b;
    --border: #2A2A30;
    --text: #EDEDEF;
    --text-secondary: #8A8A9A;
    --accent: #7C5CFC;
    --accent-hover: #9B7FFF;
    --accent-subtle: rgba(124, 92, 252, 0.08);
    --tag-border: rgba(124, 92, 252, 0.15);
    --nav-bg: rgba(7, 7, 19, 0.8);
    --nav-mobile-bg: rgba(8, 8, 23, 0.95);
    --hero-glow: rgba(124, 92, 252, 0.12);
    --availability-bg: rgba(52, 211, 153, 0.08);
    --availability-border: rgba(52, 211, 153, 0.2);
    --availability-color: #34D399;
    --shadow: none;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 8px 8px;
  font-size: 0.85rem;
  z-index: 200;
}

.skip-link:focus {
  position: fixed;
  left: 16px;
  top: 0;
  color: #fff;
}

.hidden {
  display: none;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-hover);
}

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

/*  Navigation  */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

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

.nav-theme-item {
  display: flex;
  align-items: center;
  margin-left: 4px;
}

.nav-links a {
  position: relative;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding-bottom: 4px;
  transition: color 0.2s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

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

.nav-links a:hover::after {
  opacity: 1;
}

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

.nav-links a.active::after {
  opacity: 1;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 1px;
  transition: transform 0.3s, opacity 0.3s;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 6px 8px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}

.theme-toggle .icon-moon {
  display: none;
}

.theme-toggle .icon-sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: block;
  }

  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 140px 0 100px;
  border-bottom: 1px solid var(--border);
}

.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 10%;
  width: 600px;
  height: 500px;
  background: radial-gradient(ellipse, var(--hero-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
  max-width: 800px;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.7;
  max-width: 640px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.btn:focus-visible,
.theme-toggle:focus-visible,
.nav-toggle:focus-visible,
.contact-link:focus-visible,
.nav-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* SECTIONS */
section {
  padding: 100px 0;
}

.section-label {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-description {
  color: var(--text-secondary);
  max-width: 600px;
  font-size: 1.05rem;
  line-height: 1.7;
}

/*  About  */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-top: 40px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
  font-size: 1.02rem;
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--availability-bg);
  border: 1px solid var(--availability-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--availability-color);
  margin-top: 8px;
}

.availability::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--availability-color);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.4;
  }
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.detail-card {
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.detail-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.detail-card p {
  color: var(--text);
  font-size: 0.95rem;
}

/*  Services  */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.service-card {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.2s;
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.service-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.service-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/*  Work  */
.work-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 40px;
}

.work-card {
  padding: 28px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: start;
  transition: border-color 0.2s;
}

.work-card:hover {
  border-color: var(--accent);
}

.work-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.work-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.tag {
  padding: 4px 10px;
  background: var(--accent-subtle);
  border: 1px solid var(--tag-border);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
}

.work-industry {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  white-space: nowrap;
  padding-top: 4px;
}

/*  Contact  */
.contact {
  text-align: center;
  padding: 120px 0;
}

.contact .section-description {
  margin: 0 auto 36px;
}

.contact-form {
  max-width: 560px;
  margin: 0 auto 32px;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form-group input:focus:not(:focus-visible),
.form-group textarea:focus:not(:focus-visible) {
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

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

.contact-form .btn {
  width: 100%;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: border-color 0.2s, color 0.2s;
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--text);
}

.contact-link svg {
  width: 18px;
  height: 18px;
}

/*  Footer  */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/*  Tablet  */
@media (max-width: 960px) {
  .services-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/*  Mobile  */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-theme-item {
    margin-left: 0;
  }

  .nav-toggle {
    display: block;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding: 120px 0 72px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .work-card {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .work-industry {
    order: -1;
  }

  section {
    padding: 72px 0;
  }

  .contact {
    padding: 80px 0;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

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

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .container {
    padding: 0 16px;
  }

  .service-card {
    padding: 24px;
  }

  .work-card {
    padding: 20px 24px;
  }
}