/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background-color: var(--clr-bg);
  border-bottom: 1px solid var(--clr-line);
  transition: box-shadow var(--transition-base);
}

.nav--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.125rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--clr-ink);
}

.nav__links {
  display: none;
  gap: var(--space-md);
}

.nav__links a {
  font-size: var(--fs-nav);
  color: var(--clr-ink);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  padding: 0.25rem 0;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--clr-ink);
  transition: width var(--transition-base);
}

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

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

.nav__cta {
  display: none;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  border: 1.5px solid transparent;
  cursor: pointer;
}

.btn--primary {
  background-color: var(--clr-ink);
  color: var(--clr-bg);
  border-color: var(--clr-ink);
}

.btn--primary:hover {
  background-color: var(--clr-accent);
  border-color: var(--clr-accent);
  color: var(--clr-bg);
}

.btn--outline {
  border-color: var(--clr-ink);
  color: var(--clr-ink);
  background-color: transparent;
}

.btn--outline:hover {
  background-color: var(--clr-ink);
  color: var(--clr-bg);
}

.btn--accent {
  background-color: var(--clr-accent);
  color: var(--clr-bg);
  border-color: var(--clr-accent);
}

.btn--accent:hover {
  background-color: var(--clr-accent-hover);
  border-color: var(--clr-accent-hover);
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.75rem;
  cursor: pointer;
  position: relative;
  z-index: 130;
  background: transparent;
  border: 0;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--clr-ink);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu — sits below nav so hamburger stays clickable */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--clr-bg);
  z-index: 110;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  font-size: var(--fs-h2);
  color: var(--clr-ink);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, color var(--transition-fast);
}

.mobile-menu.active a {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.active a:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active a:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.active a:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.active a:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.active a:nth-child(5) { transition-delay: 0.3s; }

.mobile-menu a:hover {
  color: var(--clr-accent);
}

/* ===== CARDS ===== */
.card {
  background-color: transparent;
  padding: 0;
  transition: transform var(--transition-fast);
}

.card:hover {
  transform: none;
}

.card__icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-sm);
  color: var(--clr-ink);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

/* ===== PAGE HEADER ===== */
.page-header {
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  text-align: left;
  background-color: var(--clr-bg);
  position: relative;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--clr-line);
}

.page-header .container {
  width: 100%;
}

.page-header__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-display);
  color: var(--clr-ink);
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 0.9;
}

.page-header__subtitle {
  color: var(--clr-ink-soft);
  font-size: var(--fs-body);
  margin-top: var(--space-sm);
  max-width: 50ch;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--clr-ink);
  color: var(--clr-bg);
  padding: var(--space-xl) 0 var(--space-md);
}

.footer h3, .footer .footer__heading {
  color: var(--clr-bg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer__heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--clr-bg);
  opacity: 0.6;
  margin-bottom: var(--space-sm);
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 8vw, 6rem);
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 0.9;
  color: var(--clr-bg);
  margin-bottom: var(--space-md);
}

.footer__text {
  color: var(--clr-bg);
  opacity: 0.75;
  font-size: var(--fs-small);
  line-height: 1.7;
  max-width: none;
}

.footer__links a {
  display: block;
  color: var(--clr-bg);
  opacity: 0.75;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 0;
  transition: opacity var(--transition-fast);
}

.footer__links a:hover {
  opacity: 1;
  color: var(--clr-bg);
}

.footer__social {
  display: flex;
  gap: var(--space-sm);
}

.footer__social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-bg);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.footer__social a:hover {
  background-color: var(--clr-bg);
  color: var(--clr-ink);
  border-color: var(--clr-bg);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm);
  color: var(--clr-bg);
  opacity: 0.6;
  font-size: var(--fs-small);
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--space-sm);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: var(--fs-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  color: var(--clr-ink);
}

.form-input {
  width: 100%;
  padding: 0.875rem 0;
  border: none;
  border-bottom: 1.5px solid var(--clr-ink);
  background-color: transparent;
  font-size: var(--fs-body);
  color: var(--clr-ink);
  border-radius: 0;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-bottom-color: var(--clr-accent);
}

.form-input--error {
  border-bottom-color: #c0392b;
}

.form-error {
  color: #c0392b;
  font-size: var(--fs-small);
  margin-top: 0.25rem;
}

textarea.form-input {
  resize: vertical;
  min-height: 100px;
  border: 1.5px solid var(--clr-ink);
  padding: 0.875rem 1rem;
}

/* ===== RESPONSIVE NAV ===== */
@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }

  .nav__cta {
    display: inline-flex;
  }

  .nav__hamburger {
    display: none;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}