/* ===========================
   CATIA CASTELBRANCO — Stylesheet
   Minimal · Professional · Photographic
   =========================== */

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

:root {
  --black:   #0a0a0a;
  --white:   #f8f6f3;
  --grey-1:  #1a1a1a;
  --grey-2:  #2e2e2e;
  --grey-3:  #6b6b6b;
  --grey-4:  #b0a99f;
  --grey-5:  #ddd8d2;
  --accent:  #c9a96e;          /* warm gold — subtle */
  --ff-serif: 'Cormorant Garamond', Georgia, serif;
  --ff-sans:  'Inter', system-ui, sans-serif;
  --ease:    cubic-bezier(0.4, 0, 0.2, 1);
  --nav-h:   68px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--ff-sans);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; width: 100%; height: 100%; object-fit: cover; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3 {
  font-family: var(--ff-serif);
  font-weight: 300;
  line-height: 1.1;
}

h1  { font-size: clamp(3.5rem, 8vw, 7rem); }
h2  { font-size: clamp(2rem, 4vw, 3.5rem); }
h3  { font-size: clamp(1.2rem, 2vw, 1.6rem); }

em  { font-style: italic; }

.label {
  display: block;
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--grey-3);
  margin-bottom: 1rem;
}

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--white); }
::-webkit-scrollbar-thumb { background: var(--grey-4); border-radius: 2px; }

/* ===========================
   NAV
   =========================== */
#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 clamp(1.5rem, 5vw, 4rem);
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

#nav.scrolled {
  background: rgba(248, 246, 243, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--grey-5);
}

.nav-logo {
  font-family: var(--ff-serif);
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--white);
  transition: color 0.4s var(--ease);
}

#nav.scrolled .nav-logo { color: var(--black); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  transition: color 0.3s var(--ease), opacity 0.3s;
  opacity: 0.85;
}

.nav-links a:hover { opacity: 1; }
#nav.scrolled .nav-links a { color: var(--black); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--white);
  transition: background 0.4s var(--ease), transform 0.3s var(--ease), opacity 0.3s;
}

#nav.scrolled .nav-toggle span { background: var(--black); }

.nav-toggle.open span:first-child { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:last-child  { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   HERO
   =========================== */
#hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.15) 0%,
    rgba(0,0,0,0.45) 60%,
    rgba(0,0,0,0.7) 100%
  );
}

.hero-img { object-position: center; }

/* Placeholder when no image */
.hero-bg:not(:has(img[src])) {
  background: linear-gradient(160deg, #1a1a1a 0%, #3a3330 100%);
}

.hero-content {
  position: absolute;
  bottom: clamp(5rem, 12vh, 9rem);
  left: clamp(1.5rem, 5vw, 4rem);
  color: var(--white);
}

.hero-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  opacity: 0.75;
}

.hero-content h1 {
  color: var(--white);
  margin-bottom: 1.2rem;
}

.hero-tagline {
  font-family: var(--ff-serif);
  font-size: clamp(0.9rem, 1.5vw, 1.1rem);
  font-style: italic;
  letter-spacing: 0.12em;
  opacity: 0.8;
}

/* Scroll arrow */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  right: clamp(1.5rem, 5vw, 4rem);
  display: flex;
  align-items: flex-end;
  height: 60px;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 100%;
  background: var(--white);
  opacity: 0.5;
  animation: scrollPulse 2s ease-in-out infinite;
  transform-origin: top;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50%       { transform: scaleY(0.5); opacity: 1; }
}

/* ===========================
   SECTION SHARED
   =========================== */
section {
  padding: clamp(5rem, 10vh, 9rem) clamp(1.5rem, 5vw, 4rem);
}

.section-header {
  max-width: 700px;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

/* ===========================
   WORK / GALLERY
   =========================== */
#work { background: var(--white); }

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.45rem 1.1rem;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--grey-5);
  color: var(--grey-3);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--black);
  border-color: var(--black);
  color: var(--white);
}

/* Gallery grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 360px;
  gap: 6px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--grey-5);
}

.gallery-item.large {
  grid-column: span 2;
}

.gallery-item img {
  transition: transform 0.7s var(--ease), filter 0.5s var(--ease);
  filter: grayscale(8%);
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: grayscale(0%);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10,10,10,0);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  transition: background 0.4s var(--ease);
}

.gallery-overlay span {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}

.gallery-item:hover .gallery-overlay { background: rgba(10,10,10,0.35); }
.gallery-item:hover .gallery-overlay span { opacity: 1; }

/* Hidden items (filtered out) */
.gallery-item.hidden {
  display: none;
}

/* ===========================
   ABOUT
   =========================== */
#about {
  background: var(--grey-1);
  color: var(--white);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 7rem);
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.about-image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--grey-2);
}

.about-text .label { color: var(--grey-4); }
.about-text h2 { color: var(--white); margin-bottom: 1.5rem; }

.about-lead {
  font-family: var(--ff-serif);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-style: italic;
  line-height: 1.6;
  color: var(--grey-5);
  margin-bottom: 1.5rem;
}

.about-text p {
  font-size: 0.9rem;
  color: var(--grey-4);
  margin-bottom: 1rem;
}

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--grey-2);
}

.stat strong {
  display: block;
  font-family: var(--ff-serif);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.stat span {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-3);
}

/* ===========================
   SERVICES
   =========================== */
#services { background: var(--white); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--grey-5);
  border: 1px solid var(--grey-5);
  margin-bottom: 2rem;
}

.service-card {
  background: var(--white);
  padding: clamp(2rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background 0.35s var(--ease);
}

.service-card:hover { background: var(--grey-1); }
.service-card:hover h3,
.service-card:hover p { color: var(--white); }
.service-card:hover .service-num { color: var(--accent); }
.service-card:hover .service-tag { border-color: var(--grey-2); color: var(--grey-4); }

.service-num {
  font-family: var(--ff-serif);
  font-size: 0.85rem;
  color: var(--grey-4);
  transition: color 0.35s var(--ease);
}

.service-card h3 { transition: color 0.35s var(--ease); }

.service-card p {
  font-size: 0.88rem;
  color: var(--grey-3);
  line-height: 1.65;
  flex: 1;
  transition: color 0.35s var(--ease);
}

.service-tag {
  display: inline-block;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--grey-5);
  padding: 0.3rem 0.8rem;
  border-radius: 2px;
  color: var(--grey-3);
  width: fit-content;
  transition: all 0.35s var(--ease);
}

.services-note {
  font-size: 0.85rem;
  color: var(--grey-3);
  text-align: center;
  padding: 1.5rem 0;
}

.services-note a {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===========================
   TESTIMONIALS
   =========================== */
#testimonials {
  background: var(--grey-1);
  color: var(--white);
  text-align: center;
  padding: clamp(5rem, 10vh, 9rem) clamp(1.5rem, 5vw, 4rem);
}

#testimonials .section-header { margin: 0 auto 3rem; }
#testimonials .label { color: var(--grey-4); }

.testimonials-track {
  max-width: 720px;
  margin: 0 auto;
  min-height: 160px;
  position: relative;
}

.testimonial {
  display: none;
  flex-direction: column;
  align-items: center;
  animation: fadeIn 0.6s var(--ease);
}

.testimonial.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.testimonial p {
  font-family: var(--ff-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-style: italic;
  font-weight: 300;
  line-height: 1.65;
  color: var(--grey-5);
  margin-bottom: 1.5rem;
}

.testimonial cite {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-3);
}

.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.t-prev, .t-next {
  width: 44px;
  height: 44px;
  border: 1px solid var(--grey-2);
  color: var(--grey-4);
  font-size: 1.1rem;
  border-radius: 50%;
  transition: all 0.3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

.t-prev:hover, .t-next:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===========================
   CONTACT
   =========================== */
#contact {
  background: var(--white);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(3rem, 6vw, 7rem);
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-text h2 { margin-bottom: 1rem; }

.contact-text > p {
  font-size: 0.88rem;
  color: var(--grey-3);
  margin-bottom: 2rem;
}

.contact-info {
  margin-bottom: 2rem;
}

.contact-info li {
  margin-bottom: 0.5rem;
}

.contact-info a {
  font-size: 0.9rem;
  color: var(--grey-2);
  border-bottom: 1px solid var(--grey-5);
  padding-bottom: 1px;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.contact-info a:hover {
  color: var(--black);
  border-color: var(--black);
}

.contact-socials {
  display: flex;
  gap: 1.5rem;
}

.contact-socials a {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-3);
  transition: color 0.3s var(--ease);
}

.contact-socials a:hover { color: var(--black); }

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-3);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--ff-sans);
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--black);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--grey-5);
  padding: 0.6rem 0;
  outline: none;
  transition: border-color 0.3s var(--ease);
  -webkit-appearance: none;
  border-radius: 0;
}

.form-group select {
  cursor: pointer;
}

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

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.btn-submit {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 1rem 2rem;
  background: var(--black);
  color: var(--white);
  border-radius: 2px;
  transition: background 0.3s var(--ease), transform 0.2s var(--ease);
}

.btn-submit:hover {
  background: var(--grey-2);
  transform: translateY(-1px);
}

.form-feedback {
  font-size: 0.82rem;
  color: var(--grey-3);
  min-height: 1.2rem;
}

.form-feedback.success { color: #5a8a5a; }
.form-feedback.error   { color: #a05050; }

/* ===========================
   FOOTER
   =========================== */
#footer {
  background: var(--black);
  color: var(--grey-3);
  padding: 2.5rem clamp(1.5rem, 5vw, 4rem);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--ff-serif);
  font-size: 1rem;
  color: var(--grey-5);
}

.footer-copy {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: color 0.3s var(--ease);
}

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

/* ===========================
   LIGHTBOX
   =========================== */
.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.94);
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}

.lightbox-backdrop.open { opacity: 1; pointer-events: all; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 501;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}

.lightbox.open { opacity: 1; pointer-events: all; }

.lb-img-wrap {
  width: 90vw;
  max-width: 1100px;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lb-img-wrap img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
}

.lb-close {
  position: fixed;
  top: 1.5rem;
  right: 2rem;
  font-size: 1.8rem;
  color: var(--grey-4);
  transition: color 0.3s var(--ease);
  z-index: 502;
}

.lb-close:hover { color: var(--white); }

.lb-prev, .lb-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--grey-4);
  padding: 1rem;
  transition: color 0.3s var(--ease);
  z-index: 502;
}

.lb-prev { left: 1.5rem; }
.lb-next { right: 1.5rem; }
.lb-prev:hover, .lb-next:hover { color: var(--white); }

.lb-caption {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-3);
  z-index: 502;
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 960px) {
  .about-inner,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .about-image {
    aspect-ratio: 16 / 9;
    max-height: 420px;
  }

  .gallery {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 280px;
  }

  .gallery-item.large { grid-column: span 2; }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(248,246,243,0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 1rem 0 2rem;
    border-bottom: 1px solid var(--grey-5);
    transform: translateY(-110%);
    transition: transform 0.4s var(--ease);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    pointer-events: all;
  }

  .nav-links a {
    color: var(--black) !important;
    padding: 0.9rem 2rem;
    width: 100%;
    text-align: center;
  }

  .nav-toggle { display: flex; }

  .gallery {
    grid-template-columns: 1fr;
    grid-auto-rows: 300px;
  }

  .gallery-item.large { grid-column: span 1; }

  .about-stats {
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .lb-prev, .lb-next { display: none; }
}

/* ===========================
   ANIMATIONS — Intersection Observer
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

.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; }