/* ============================================================
   PIEDRASANTA.SPACE — Components
   ============================================================ */

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding-inline: var(--gutter);
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out);
}

.nav.scrolled {
  background: rgba(10, 10, 12, 0.92);
  border-color: var(--border-mid);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.nav__logo-mark {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__logo-mark svg {
  width: 18px;
  height: 18px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav__link:hover { color: var(--text-primary); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link.active { color: var(--accent); }
.nav__link.active::after { transform: scaleX(1); }

.nav__cta {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-6);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}

.nav__cta:hover {
  background: var(--accent);
  color: var(--text-on-accent);
  border-color: var(--accent);
}

/* Mobile menu toggle */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px;
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--dur-base) var(--ease-out),
              opacity var(--dur-base) var(--ease-out);
}

.nav.menu-open .nav__hamburger span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav.menu-open .nav__hamburger span:nth-child(2) { opacity: 0; }
.nav.menu-open .nav__hamburger span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile drawer */
.nav__drawer {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: var(--surface-01);
  border-bottom: 1px solid var(--border-mid);
  padding: var(--sp-6) var(--gutter) var(--sp-8);
  flex-direction: column;
  gap: var(--sp-6);
  z-index: 99;
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--dur-slow) var(--ease-out),
              opacity var(--dur-slow) var(--ease-out);
}

.nav__drawer.open {
  transform: translateY(0);
  opacity: 1;
}

.nav__drawer .nav__link {
  font-size: var(--text-lg);
  padding-block: var(--sp-2);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--sp-4) var(--sp-8);
  transition: all var(--dur-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.06);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out);
}

.btn:hover::before { opacity: 1; }
.btn:active::before { opacity: 0; }

.btn--primary {
  background: var(--accent);
  color: var(--text-on-accent);
  box-shadow: var(--shadow-2);
}

.btn--primary:hover {
  background: var(--accent-bright);
  box-shadow: var(--shadow-4);
  transform: translateY(-1px);
}

.btn--outline {
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

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

.btn--ghost {
  color: var(--text-secondary);
  padding-inline: var(--sp-4);
}

.btn--ghost:hover { color: var(--text-primary); }

/* ── Service Cards ── */
.service-card {
  background: var(--surface-02);
  border: 1px solid var(--border-subtle);
  padding: var(--sp-8);
  transition: transform var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out),
              box-shadow var(--dur-slow) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-4), 0 0 40px var(--accent-glow);
}

.service-card:hover::before { opacity: 1; }

.service-card__icon {
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-6);
  color: var(--accent);
  transition: border-color var(--dur-base) var(--ease-out);
}

.service-card:hover .service-card__icon {
  border-color: var(--accent-border);
}

.service-card__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}

.service-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--sp-3);
}

.service-card__body {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Portfolio Cards ── */
.portfolio-card {
  position: relative;
  overflow: hidden;
  background: var(--surface-02);
  border: 1px solid var(--border-subtle);
  aspect-ratio: 4/3;
  cursor: pointer;
}

.portfolio-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-in-out),
              filter var(--dur-slow) var(--ease-out);
  filter: brightness(0.7) saturate(0.8);
}

.portfolio-card:hover .portfolio-card__img {
  transform: scale(1.04);
  filter: brightness(0.5) saturate(0.6);
}

.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--sp-6);
  background: linear-gradient(to top, rgba(10,10,12,0.9) 0%, transparent 60%);
  transition: background var(--dur-slow) var(--ease-out);
}

.portfolio-card:hover .portfolio-card__overlay {
  background: linear-gradient(to top, rgba(10,10,12,0.95) 0%, rgba(10,10,12,0.4) 100%);
}

.portfolio-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.portfolio-card__title {
  font-size: var(--text-xl);
  color: var(--text-primary);
  transition: transform var(--dur-base) var(--ease-out);
}

.portfolio-card:hover .portfolio-card__title {
  transform: translateY(-4px);
}

.portfolio-card__arrow {
  position: absolute;
  top: var(--sp-6); right: var(--sp-6);
  width: 40px; height: 40px;
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  opacity: 0;
  transform: translate(8px, -8px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}

.portfolio-card:hover .portfolio-card__arrow {
  opacity: 1;
  transform: translate(0, 0);
}

/* ── Contact Form ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.form-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.form-control {
  background: var(--surface-03);
  border: 1px solid var(--border-mid);
  color: var(--text-primary);
  padding: var(--sp-4) var(--sp-6);
  font-size: var(--text-base);
  width: 100%;
  transition: border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.form-control::placeholder { color: var(--text-tertiary); }

.form-control:focus {
  border-color: var(--accent-dim);
  background: var(--surface-04);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

/* ── Divider / Section Label ── */
.section-label {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.section-label__text {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.section-label__line {
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* ── Reveal Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 80ms; }
.reveal--delay-2 { transition-delay: 160ms; }
.reveal--delay-3 { transition-delay: 240ms; }
.reveal--delay-4 { transition-delay: 320ms; }
.reveal--delay-5 { transition-delay: 400ms; }

/* ── Footer ── */
.footer {
  background: var(--surface-01);
  border-top: 1px solid var(--border-subtle);
  padding-block: var(--sp-12) var(--sp-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin-bottom: var(--sp-4);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  transition: color var(--dur-fast) var(--ease-out);
}

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
}