/* ========================================
   Northfield Studio — Style
   ======================================== */

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

:root {
  --bg: #101010;
  --bg-card: rgba(255, 255, 255, 0.04);
  --text-primary: #f0f0f0;
  --text-secondary: #999999;
  --text-muted: #666666;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* --- Container --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 20px 0;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
}

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

.nav__logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav__menu {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent);
  transition: width var(--transition);
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link:hover::after {
  width: 100%;
}

/* Mobile toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
  border-radius: 1px;
}

/* --- Hero --- */
.hero {
  display: flex;
  align-items: flex-start;
  position: relative;
  padding-top: 120px;
  padding-bottom: 120px;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__accent {
  background: linear-gradient(135deg, var(--accent) 0%, #818cf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.hero__gradient {
  display: none;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.btn--primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

.btn--large {
  padding: 18px 40px;
  font-size: 1rem;
}

/* --- Sections --- */
.section {
  padding: 120px 0;
}

.section--alt {
  background-color: transparent;
}

.section__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
}

/* --- About --- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about__text p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.about__values {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.value {
  padding: 24px;
  border-radius: var(--radius);
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.value:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
}

.value__icon {
  color: var(--accent);
  margin-bottom: 12px;
}

.value h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.value p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Services --- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 40px 32px;
  border-radius: var(--radius);
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.service-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-card__icon {
  color: var(--accent);
  margin-bottom: 24px;
}

.service-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-card__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Contact --- */
.contact__content {
  text-align: center;
  max-width: 600px;
}

.contact__text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

/* --- Footer --- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer__logo {
  font-size: 0.9375rem;
  font-weight: 600;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--bg);
    flex-direction: column;
    padding: 100px 40px 40px;
    gap: 24px;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }

  .nav__menu.active {
    right: 0;
  }

  .nav__link {
    font-size: 1rem;
  }

  .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);
  }

  .section {
    padding: 80px 0;
  }

  .section__title {
    margin-bottom: 40px;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .services__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-card {
    padding: 32px 24px;
  }

  .footer__content {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .hero__gradient {
    width: 100%;
    right: -40%;
    opacity: 0.6;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 2.25rem;
  }

  .btn--large {
    padding: 16px 28px;
    font-size: 0.875rem;
  }
}