/* ==========================================================================
   Components — Nav, Buttons, Cards, Tags
   ========================================================================== */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  transition: background-color var(--duration-fast), box-shadow var(--duration-fast);
}

.nav.is-scrolled {
  background-color: rgba(250, 246, 241, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(44, 40, 37, 0.06);
}

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

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-charcoal);
  letter-spacing: -0.01em;
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
}

.nav__link {
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-stone);
  position: relative;
  transition: color var(--duration-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-terracotta);
  transition: width var(--duration-base) var(--ease-out-expo);
}

.nav__link:hover {
  color: var(--color-charcoal);
}

.nav__link:hover::after {
  width: 100%;
}

/* --- Hamburger --- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 110;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-charcoal);
  transition: transform var(--duration-fast), opacity var(--duration-fast);
}

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

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

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

/* --- Mobile Menu Overlay --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 105;
  background-color: var(--color-ivory);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out-expo),
              visibility 0s var(--duration-base);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--duration-base) var(--ease-out-expo),
              visibility 0s;
}

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.mobile-menu__link {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--color-charcoal);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-base) var(--ease-out-expo),
              transform var(--duration-base) var(--ease-out-expo);
}

.mobile-menu.is-open .mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.is-open .mobile-menu__link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.is-open .mobile-menu__link:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.is-open .mobile-menu__link:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.is-open .mobile-menu__link:nth-child(4) { transition-delay: 0.25s; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: var(--space-sm) var(--space-lg);
  border: 1.5px solid var(--color-charcoal);
  border-radius: 100px;
  transition: background-color var(--duration-fast),
              color var(--duration-fast),
              transform var(--duration-fast);
  will-change: transform;
}

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

.btn--primary {
  background-color: var(--color-terracotta);
  border-color: var(--color-terracotta);
  color: var(--color-ivory);
}

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

.btn--large {
  font-size: var(--text-body);
  padding: var(--space-md) var(--space-xl);
}

/* --- Tags / Pills --- */
.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.35em 0.85em;
  border-radius: 100px;
  background-color: var(--color-light-sage);
  color: var(--color-sage);
}

.tag--terracotta {
  background-color: var(--color-blush);
  color: var(--color-deep-clay);
}

/* --- Project Cards --- */
.project-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background-color: var(--color-parchment);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-base) var(--ease-out-expo);
}

.project-card:hover .project-card__image img {
  transform: scale(1.05);
}

.project-card__tag {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 2;
}

.project-card__content {
  padding: var(--space-md) var(--space-md) var(--space-lg);
}

.project-card__title {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: 0.35em;
  position: relative;
  display: inline;
  background-image: linear-gradient(var(--color-terracotta), var(--color-terracotta));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: left bottom;
  transition: background-size var(--duration-base) var(--ease-out-expo);
}

.project-card:hover .project-card__title {
  background-size: 100% 2px;
}

.project-card__desc {
  font-size: var(--text-small);
  color: var(--color-stone);
  margin-top: 0.5em;
  line-height: 1.5;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-stone);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.project-card__status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.project-card__status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-sage);
}

.project-card__status--active::before {
  background-color: var(--color-terracotta);
  animation: pulse 2s ease infinite;
}

/* --- Section Label --- */
.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: var(--space-lg);
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-parchment);
}

/* --- Section Heading with Rules --- */
.section-heading-ruled {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.section-heading-ruled::before,
.section-heading-ruled::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: rgba(44, 40, 37, 0.12);
}

.section-heading-ruled h2 {
  white-space: nowrap;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background-color: var(--color-terracotta);
  z-index: 200;
  transform-origin: left;
  transform: scaleX(0);
  width: 100%;
}