/* ============================================
   STUDIO 255 - MAIN STYLESHEET (RESTORED)
   Black & White Minimal System
   ============================================ */

:root {
  --white: #ffffff;
  --white-soft: #fafafa;
  --white-muted: #f5f5f5;
  --black: #0a0a0a;
  --black-soft: #1a1a1a;
  --gray-light: #8a8a8a;
  --gray-mid: #4a4a4a;
  --gray-dark: #2a2a2a;
  --border: rgba(10, 10, 10, 0.1);
  --border-dark: rgba(255, 255, 255, 0.1);
  --accent: #0a0a0a;
  --accent-light: #333333;

  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-size-h1: 4.5rem;
  --font-size-h2: 2.5rem;
  --font-size-h3: 1.5rem;
  --font-size-body: 1rem;
  --font-size-small: 0.85rem;
  --line-height-tight: 1.1;
  --line-height-normal: 1.6;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  --spacing-xxxl: 5rem;

  --transition-normal: 0.2s ease;
  --transition-smooth: 0.35s ease;

  --max-width: 1280px;
  --container-padding: 2rem;
  --grid-gap: 2rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--black);
  background: var(--white);
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-normal);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--line-height-tight);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-h1); }

h2 { font-size: var(--font-size-h2); }

h3 { font-size: var(--font-size-h3); }

h4 { font-size: 1.1rem; }

p { margin-bottom: var(--spacing-md); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }

.grid-3 { grid-template-columns: repeat(3, 1fr); }

.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col { display: flex; flex-direction: column; }

.gap-sm { gap: var(--spacing-sm); }

.gap-md { gap: var(--spacing-md); }

.gap-lg { gap: var(--spacing-lg); }

section { padding: var(--spacing-xxxl) 0; }

section.gray-bg { background: var(--white-muted); }

.section-header {
  display: grid;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-light);
}

.section-number {
  font-size: 6rem;
  font-weight: 700;
  color: var(--black);
  opacity: 0.06;
  line-height: 1;
}

.section-divider {
  border-top: 1px solid var(--border);
  margin: var(--spacing-xxl) 0;
}

button,
.btn,
a.btn {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: var(--spacing-md) var(--spacing-xl);
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  white-space: nowrap;
}

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

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

.btn-outline:hover {
  background: var(--black);
  color: var(--white);
}

/* Navigation */
nav {
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.main-nav.scrolled {
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.nav-logo .logo-text {
  letter-spacing: 0.2em;
  font-weight: 700;
  font-size: 0.95rem;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  position: relative;
  padding-bottom: 0.35rem;
  color: var(--black);
  font-size: 0.8rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--black);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.hamburger {
  width: 36px;
  height: 24px;
  border: none;
  background: transparent;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--black);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--white);
  transform: translateY(-100%);
  transition: transform var(--transition-smooth);
  z-index: 999;
  padding: 120px var(--container-padding);
}

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

.mobile-menu-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  color: var(--black);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 860px;
}

.hero-kicker {
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gray-light);
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  line-height: 0.95;
  margin-bottom: var(--spacing-lg);
}

.hero-title span { display: block; }

.hero-subtitle {
  max-width: 560px;
  color: var(--gray-mid);
  font-size: 1.05rem;
  margin-bottom: var(--spacing-xl);
}

.hero-actions { display: flex; gap: var(--spacing-md); flex-wrap: wrap; }

/* Cards */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: var(--spacing-xl);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--black);
}

.card-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-light);
  margin-bottom: var(--spacing-sm);
}

.card ul {
  list-style: none;
  margin: var(--spacing-md) 0 var(--spacing-lg);
  padding: 0;
  color: var(--gray-mid);
}

.card ul li {
  padding: 0.35rem 0 0.35rem 1rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.card ul li:last-child { border-bottom: none; }

.card ul li::before {
  content: "-";
  position: absolute;
  left: 0;
  color: var(--black);
}

/* Portfolio */
.filter-bar {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--black);
  background: var(--white);
  color: var(--black);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: var(--font-size-small);
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.portfolio-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--white-muted);
  border: 1px solid var(--border);
}

.portfolio-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

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

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.9);
  color: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--spacing-xl);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.portfolio-card:hover .portfolio-overlay { opacity: 1; }

.portfolio-type {
  font-size: var(--font-size-small);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.portfolio-cta {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--white);
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: var(--font-size-small);
}

.portfolio-cta:hover {
  background: var(--white);
  color: var(--black);
}

.placeholder {
  width: 100%;
  height: 100%;
  background: var(--white-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--black);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  text-align: center;
  padding: var(--spacing-md);
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-caption {
  position: absolute;
  inset: auto 0 0 0;
  background: rgba(255, 255, 255, 0.95);
  color: var(--black);
  padding: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  transition: transform var(--transition-smooth), background var(--transition-smooth), color var(--transition-smooth);
  transform: translateY(100%);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
  background: rgba(10, 10, 10, 0.9);
  color: var(--white);
}

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.reviews-grid img { border: 1px solid var(--border); }

.review-card {
  border: 1px solid var(--border);
}

/* Forms */
form {
  display: grid;
  gap: var(--spacing-md);
}

label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-mid);
}

input,
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 1rem;
  border-radius: 0;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--black);
}

/* Footer */
.footer {
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: var(--spacing-xxl) 0;
}

.footer-links,
.footer-social {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-bottom {
  margin-top: var(--spacing-xl);
  font-size: var(--font-size-small);
  color: var(--gray-mid);
}

/* WhatsApp */
.whatsapp-btn {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  border: 1px solid var(--black);
  transition: all var(--transition-normal);
}

.whatsapp-btn:hover {
  background: var(--white);
  color: var(--black);
}

.desktop-only { display: flex; }

.mobile-only { display: none; }

@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .mobile-only { display: flex; }
  .desktop-only { display: none; }

  .hero { padding-top: 100px; }
  .nav-menu { display: none; }
  .container { padding: 0 1.25rem; }
  .footer { padding-bottom: calc(var(--spacing-xxl) + 60px); }

  .whatsapp-btn {
    right: 16px;
    bottom: 16px;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}