/* ==========================================================================
   TOMAS ESPINOZA — Global Stylesheet
   Light / Editorial — AD-Style
   Typography: Playfair Display + Inter
   Colors: #FAFAF8 / #1A1A1A / #8B7355
   ========================================================================== */

/* --- Google Fonts (swap to self-hosted @font-face for production) --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Playfair+Display:wght@400;700&display=swap');

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #FAFAF8;
  --color-text: #1A1A1A;
  --color-accent: #8B7355;
  --color-accent-hover: #7A6448;
  --color-border: #E5E3DF;
  --color-text-muted: #6B6B6B;
  --color-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --max-width: 1280px;
  --max-width-narrow: 800px;
  --max-width-text: 640px;
  --nav-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

h4 {
  font-size: 1.125rem;
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

p {
  margin-bottom: var(--space-sm);
  max-width: 65ch;
}

p:last-child {
  margin-bottom: 0;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-accent {
  color: var(--color-accent);
}

/* Overline label — small uppercase text above headings */
.overline {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-xs);
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--text {
  max-width: var(--max-width-text);
}

.section {
  padding: var(--space-3xl) 0;
}

.section--sm {
  padding: var(--space-xl) 0;
}

.section--lg {
  padding: calc(var(--space-3xl) * 1.5) 0;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.nav--hidden {
  transform: translateY(-100%);
}

.nav--scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

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

/* Wordmark logo */
.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.7;
}

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

.nav__link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 4px 0;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav__toggle--open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle--open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle--open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 999;
}

.nav__mobile--open {
  display: flex;
}

.nav__mobile .nav__link {
  font-size: 1rem;
  letter-spacing: 0.12em;
}

/* Body offset for fixed nav */
.main {
  margin-top: var(--nav-height);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0 var(--space-lg);
  background-color: var(--color-bg);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__wordmark {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 36ch;
}

.footer__heading {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer__link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.875rem 2rem;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-align: center;
}

.btn--primary {
  background-color: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

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

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-text);
}

.btn--outline:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn--accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* Text link with arrow */
.link-arrow {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.link-arrow:hover {
  gap: 0.75rem;
  color: var(--color-accent);
}

.link-arrow::after {
  content: '→';
  font-size: 1rem;
}

/* ==========================================================================
   Portfolio Grid
   ========================================================================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

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

.portfolio-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.portfolio-item--tall {
  aspect-ratio: 3 / 4;
}

.portfolio-item--wide {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}

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

.portfolio-item:hover img {
  transform: scale(1.03);
}

/* Optional overlay on hover */
.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.5) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-md);
}

.portfolio-item:hover .portfolio-item__overlay {
  opacity: 1;
}

.portfolio-item__caption {
  font-size: 0.8125rem;
  color: var(--color-white);
  font-weight: 500;
}

/* ==========================================================================
   Hero Sections
   ========================================================================== */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.hero__overline {
  margin-bottom: var(--space-sm);
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 50ch;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

/* Hero with background image */
.hero--image {
  position: relative;
  min-height: 70vh;
  justify-content: center;
  color: var(--color-white);
}

.hero--image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 26, 0.35);
  z-index: 1;
}

.hero--image > * {
  position: relative;
  z-index: 2;
}

.hero--image h1,
.hero--image .hero__subtitle {
  color: var(--color-white);
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   Publication Credits Bar
   ========================================================================== */
.credits {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.credits__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.credits__label {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.credits__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.credits__item {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  opacity: 0.6;
  white-space: nowrap;
}

/* ==========================================================================
   Contact / CTA Section
   ========================================================================== */
.cta-section {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  background-color: var(--color-bg);
}

.cta-section h2 {
  margin-bottom: var(--space-sm);
}

.cta-section p {
  margin: 0 auto var(--space-lg);
  color: var(--color-text-muted);
  max-width: 48ch;
}

/* Contact form */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-text);
  border-radius: 0;
  transition: border-color var(--transition-fast);
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

/* ==========================================================================
   Lightbox
   ========================================================================== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(26, 26, 26, 0.92);
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.lightbox--open {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
}

.lightbox__close:hover {
  opacity: 0.7;
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
}

.lightbox__nav:hover {
  opacity: 0.7;
}

.lightbox__nav--prev {
  left: var(--space-md);
}

.lightbox__nav--next {
  right: var(--space-md);
}

/* ==========================================================================
   Lazy Loading
   ========================================================================== */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* ==========================================================================
   Responsive — Tablet
   ========================================================================== */
@media (max-width: 1024px) {
  .portfolio-grid--three {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

/* ==========================================================================
   Responsive — Mobile
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }

  /* Nav: show toggle, hide desktop links */
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  /* Portfolio adjusts to single column for tall items */
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .portfolio-item--wide {
    grid-column: span 2;
  }

  /* Footer stacks */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  /* Credits wrap tighter */
  .credits__inner {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .credits__list {
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-item--wide {
    grid-column: span 1;
  }

  .hero {
    padding: var(--space-xl) var(--space-sm);
  }
}