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

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #111111;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-primary: #111111;
  --color-primary-hover: #333333;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1000px;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
}

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

ul { list-style: none; }

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

/* ===== Typography ===== */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 520px;
}

.section-header {
  margin-bottom: 48px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

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

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav--scrolled {
  border-bottom-color: var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav__logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__links a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

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

.nav__toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

/* ===== Hero ===== */
.hero {
  padding: 130px 0 80px;
}

.hero__content {
  max-width: 600px;
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 28px;
  max-width: 480px;
}

/* ===== Services ===== */
.services {
  padding: 80px 0;
  border-top: 1px solid var(--color-border-light);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--transition);
}

.service-card:hover {
  border-color: #bbb;
}

.service-card__icon {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

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

.service-card__text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== About ===== */
.about {
  padding: 80px 0;
  border-top: 1px solid var(--color-border-light);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about__text p {
  color: var(--color-text-secondary);
  margin-bottom: 14px;
  line-height: 1.7;
}

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

.value h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* ===== Contact / CTA ===== */
.cta {
  padding: 80px 0;
  border-top: 1px solid var(--color-border-light);
}

.cta__inner {
  max-width: 480px;
}

.cta__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.cta__text {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.cta__form {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.cta__input {
  flex: 1;
  padding: 12px 14px;
  font-family: var(--font);
  font-size: 0.95rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  outline: none;
  transition: border-color var(--transition);
}

.cta__input:focus {
  border-color: #999;
}

.cta__note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border-light);
}

.footer__bottom {
  text-align: center;
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 700px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    align-items: flex-start;
  }

  .nav__links.active {
    display: flex;
  }

  .nav__toggle {
    display: flex;
  }

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

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

  .cta__form {
    flex-direction: column;
  }
}