@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@900&display=swap');

@font-face {
  font-family: 'InterDisplay';
  src: url('../fonts/InterDisplay-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'InterDisplay';
  src: url('../fonts/InterDisplay-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'InterDisplay';
  src: url('../fonts/InterDisplay-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'InterDisplay';
  src: url('../fonts/InterDisplay-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

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

:root {
  --white: #ffffff;
  --off-white: #f7f7f5;
  --black: #0a0a0a;
  --gray-100: #f0f0ee;
  --gray-300: #d0d0cc;
  --gray-500: #8a8a85;
  --gray-700: #4a4a45;
  --accent: #0a0a0a;

  --font-sans: 'InterDisplay', -apple-system, BlinkMacSystemFont, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.75rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --max-width: 1100px;
  --nav-height: 64px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  font-optical-sizing: auto;
}

body {
  font-family: var(--font-sans);
  background-color: var(--white);
  color: var(--black);
  line-height: 1.6;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color var(--transition-base);
}

nav.scrolled {
  border-bottom-color: var(--gray-300);
}

.nav-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-logo {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--black);
}

.logo-wordmark {
  display: flex;
  align-items: baseline;
  gap: 0.45em;
}

.logo-faros {
  font-family: 'Archivo', sans-serif;
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.logo-studio {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.5rem;
  letter-spacing: 0.14em;
}

.nav-logo svg {
  flex-shrink: 0;
}

.nav-links {
  justify-self: center;
}

.lang-toggle {
  justify-self: end;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--gray-700);
  transition: color var(--transition-fast);
}

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

/* ── Global Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--black);
  color: var(--white);
  padding: var(--space-4) var(--space-8);
  border-radius: 980px;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: background var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--gray-700);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--black);
  padding: var(--space-4) var(--space-8);
  border-radius: 980px;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid var(--gray-300);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: var(--black);
  transform: translateY(-2px);
}

.fade-in {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 1.4s cubic-bezier(0.4, 0, 0.2, 1), transform 1.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@media (max-width: 768px) {
  .fade-in {
    transform: translateY(22px);
  }

  /* ── Mobile nav ── */
  .nav-inner {
    grid-template-columns: 1fr auto;
    padding: 0 var(--space-4);
  }

  .nav-links {
    display: none;
  }

  .lang-toggle {
    justify-self: end;
    font-size: 0.6875rem;
    padding: 5px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    transform: none;
    transition: opacity 0.4s ease;
  }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--gray-500);
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--black);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

/* ── Language toggle ── */
.lang-toggle {
  background: none;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 980px;
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.lang-toggle:hover {
  border-color: var(--black);
  color: var(--black);
}