/* ── Keyframes ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(60px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes scrollIndicator {
  0%   { opacity: 1; transform: translateY(0); }
  50%  { opacity: 0.3; transform: translateY(6px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ── Scroll Progress Bar ── */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-rust);
  transform: scaleX(0);
  transform-origin: left;
  z-index: var(--z-top);
  pointer-events: none;
}

/* ── Page Loader ── */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--color-charcoal);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

body.loaded #page-loader {
  opacity: 0;
  visibility: hidden;
}

.loader__logo {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--color-sand);
  letter-spacing: 0.2em;
}

.loader__bar-container {
  width: 200px;
  height: 2px;
  background: rgba(196, 168, 130, 0.2);
  overflow: hidden;
}

.loader__bar {
  height: 100%;
  width: 0;
  background: var(--color-rust);
  transition: width 1.8s ease;
}

/* ── Scroll Reveal Classes ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 800ms, transform 800ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal--left  { transform: translateX(-60px); }
.reveal--right { transform: translateX(60px); }
.reveal--scale { transform: scale(0.9); }

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }
.reveal--delay-5 { transition-delay: 0.5s; }

/* ── Marquee ── */
.marquee__inner {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.marquee__inner span {
  padding: 0 3rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
  color: var(--color-concrete);
  text-transform: uppercase;
  white-space: nowrap;
}

.marquee__inner:hover {
  animation-play-state: paused;
}

/* ── Navbar ── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 1.5rem var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding 400ms ease, background 400ms ease, transform 400ms ease;
}

#navbar.navbar--scrolled {
  padding: 0.75rem var(--space-md);
  background: rgba(28, 26, 23, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(196, 168, 130, 0.1);
}

/* ── Hero ── */
#hero {
  height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-charcoal) url('../assets/images/hero-bg.jpg') center / cover no-repeat;
}

#three-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-md);
}

.hero-word {
  display: inline-block;
}

#hero h1 {
  font-size: var(--text-hero);
  line-height: 0.9;
  color: var(--color-offwhite);
}

.hero__sub {
  font-family: var(--font-mono);
  letter-spacing: 0.2em;
  color: var(--color-concrete);
  margin: 2rem 0;
  font-size: var(--text-sm);
}

.hero__cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-concrete);
  font-size: 1.5rem;
}

/* ── Process ── */
.process__steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  margin-top: var(--space-lg);
}

.process__step {
  flex: 1;
  padding: var(--space-md);
  position: relative;
}

.process__number {
  display: block;
  font-family: var(--font-display);
  font-size: 3rem;
  color: rgba(196, 168, 130, 0.2);
  line-height: 1;
}

.process__step h3 {
  color: var(--color-sand);
  margin-bottom: 0.5rem;
}

.process__line {
  width: var(--space-md);
  height: 1px;
  background: rgba(196, 168, 130, 0.15);
  align-self: center;
  flex-shrink: 0;
}

/* ── Project Cards ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(196, 168, 130, 0.1);
  margin-top: var(--space-md);
}

.project-card {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-charcoal-light, #2a2825);
  background-size: cover;
  background-position: center;
  cursor: pointer;
}

.project-card:nth-child(1),
.project-card:nth-child(4) {
  aspect-ratio: 3 / 4;
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
  transform: translateY(100%);
  transition: transform 500ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: var(--space-md);
}

.project-card:hover .project-card__overlay {
  transform: translateY(0);
}

.project-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}

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

/* ── WhatsApp ── */
#whatsapp-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  text-decoration: none;
  z-index: var(--z-top);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
  transition: transform 300ms ease;
}

#whatsapp-btn:hover {
  transform: scale(1.1);
}

.whatsapp__tooltip {
  position: absolute;
  right: 70px;
  background: var(--color-charcoal);
  color: var(--color-offwhite);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms;
}

#whatsapp-btn:hover .whatsapp__tooltip {
  opacity: 1;
}

/* ── Form ── */
.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-concrete);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(196, 168, 130, 0.2);
  color: var(--color-offwhite);
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 300ms;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-sand);
}

.field--error {
  border-color: var(--color-rust) !important;
}

.field-error {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-rust);
  margin-top: 0.25rem;
  display: block;
}

/* ── Transition Utilities ── */
.transition-fade {
  transition: opacity var(--transition-base);
}

.transition-transform {
  transition: transform var(--transition-slow);
}

.transition-all {
  transition: all var(--transition-base);
}

/* ── Loading Spinner ── */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-concrete);
  border-top-color: var(--color-rust);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}