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

html { scroll-behavior: smooth; }

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-text: #1a1a2e;
  --color-muted: #6b7280;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --font: 'Inter', system-ui, sans-serif;
  --radius: 12px;
  --max-width: 1100px;
}

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

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

/* NAV */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn {
  background: none;
  border: none;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.15s;
}

.lang-btn.active {
  color: var(--color-accent);
}

.lang-btn:hover {
  color: var(--color-accent);
}

.lang-sep {
  color: var(--color-border);
  font-size: 0.85rem;
}

/* HERO */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 780px;
  margin: 0 auto 20px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 580px;
  margin: 0 auto 36px;
}

.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

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

/* SECTIONS */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 40px;
}

/* CARDS */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: box-shadow 0.2s, transform 0.15s;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.07);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 60px;
  align-items: start;
}

.about-grid p {
  color: var(--color-muted);
  margin-bottom: 16px;
  font-size: 1rem;
}

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

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.meta-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.meta-val {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* CONTACT */
.contact-box {
  text-align: center;
}

.contact-box p {
  color: var(--color-muted);
  margin-bottom: 28px;
  font-size: 1rem;
}

/* FORM */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-accent);
}

.contact-form textarea {
  resize: vertical;
  min-height: 110px;
}

.contact-form .btn-primary {
  align-self: center;
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

/* FOOTER */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.6);
  padding: 28px 0;
  font-size: 0.82rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-legal {
  line-height: 1.6;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-links a:hover {
  color: #fff;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero {
    padding: 70px 0 60px;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

  .nav-links {
    display: none;
  }

  .section-title {
    font-size: 1.6rem;
  }

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

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}