/* ===========================
   MAD. — GLOBAL DESIGN SYSTEM
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;900&family=Bebas+Neue&family=Space+Grotesk:wght@300;400;500;700&display=swap');

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

html {
  scroll-behavior: smooth;
}

/* --- TOKENS --- */
:root {
  --black: #0a0a0a;
  --white: #f5f5f0;
  --gray-100: #1a1a1a;
  --gray-200: #2a2a2a;
  --gray-300: #444;
  --gray-400: #888;
  --gray-500: #bbb;
  --accent: #e8e0d0;

  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-ui: 'Inter', sans-serif;

  --nav-h: 72px;
  --max-w: 1200px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- BASE --- */
body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===========================
   NAVBAR
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  transition: background var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--gray-200);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__logo img {
  height: 44px;
  width: 44px;
  object-fit: contain;
  filter: invert(0);
}

.nav__links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav__links a {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-500);
  transition: color var(--transition);
  position: relative;
}

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

.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

/* --- BURGER --- */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--white);
  transition: var(--transition);
}

/* --- MOBILE NAV --- */
.nav__mobile {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile a {
  font-family: var(--font-display);
  font-size: 3.5rem;
  letter-spacing: 0.05em;
  color: var(--white);
  transition: color var(--transition);
}

.nav__mobile a:hover {
  color: var(--gray-400);
}

.nav__mobile__close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
}

/* ===========================
   UTILITY CLASSES
   =========================== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
}

.section--sm {
  padding: 5rem 0;
}

.label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.heading-xl {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 10rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
}

.heading-lg {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 6rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
}

.heading-md {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 3rem);
  line-height: 1;
  letter-spacing: 0.03em;
}

.text-muted {
  color: var(--gray-400);
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--gray-200);
  margin: 4rem 0;
}

/* --- BUTTON --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn--light {
  background: var(--white);
  color: var(--black);
  padding: 0.85rem 2rem;
}

.btn--light:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  padding: 0.8rem 1.8rem;
  border: 1px solid var(--gray-300);
}

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

/* --- FADE IN ANIMATION --- */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===========================
   FOOTER
   =========================== */
.footer {
  border-top: 1px solid var(--gray-200);
  padding: 3rem 0;
  margin-top: auto;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer__logo img {
  height: 36px;
  width: 36px;
  object-fit: contain;
}

.footer__copy {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--gray-400);
  letter-spacing: 0.08em;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer__links a {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--white);
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  .section {
    padding: 5rem 0;
  }

  .container {
    padding: 0 1.25rem;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}