/* ============================================================
   Jennifer Koper Design — Premium Design System
   Inspired by luxury interior design aesthetics
   ============================================================ */

/* --- CSS Variables ---------------------------------------- */
:root {
  --color-black: #1a1a1a;
  --color-white: #ffffff;
  --color-cream: #faf8f3;
  --color-taupe: #8b8680;
  --color-gold: #d4af8a;
  --color-light-gray: #f5f3f0;
  --color-dark-gray: #6b6b6b;
  
  --font-serif: 'Playfair Display', 'Georgia', serif;
  --font-serif-alt: 'Lora', 'Georgia', serif;
  --font-sans: 'Inter', 'Helvetica Neue', sans-serif;
  
  --transition-base: 0.35s ease;
  --transition-fast: 0.2s ease;
  
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 60px;
  --spacing-2xl: 80px;
}

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

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

body {
  font-family: var(--font-sans);
  background: #E1DFD9;
  color: var(--color-black);
  line-height: 1.6;
  letter-spacing: 0.3px;
}

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

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

/* --- Site Wrapper ----------------------------------------- */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #E1DFD9;
  animation: site-fade-in 0.5s ease both;
}

@keyframes site-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* --- Header ----------------------------------------------- */
.header {
  padding: var(--spacing-lg) var(--spacing-xl);
  position: sticky;
  top: 0;
  background: #524A3A;
  z-index: 100;
  backdrop-filter: blur(8px);
  background-color: rgba(82, 74, 58, 0.98);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  gap: var(--spacing-md);
}

.header-top {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  position: relative;
}

.logo-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  transition: opacity var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.8;
}

.logo {
  width: 120px;
  height: 120px;
  display: block;
  flex-shrink: 0;
}

.logo-text {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f5f3f0;
  font-weight: 500;
  white-space: nowrap;
}

.nav {
  display: block;
  width: 100%;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
}

.nav ul li a {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f5f3f0;
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition-fast);
}

.nav ul li a:hover::after,
.nav ul li.active a::after {
  width: 100%;
}

/* --- Hero Section ----------------------------------------- */
.hero {
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-lg);
  background: #E1DFD9;
  text-align: center;
  animation: hero-fade-in 0.8s ease 0.1s both;
}

@keyframes hero-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 600;
  line-height: 1.2;
  color: #E1DFD9;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-family: var(--font-serif-alt);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--color-taupe);
  font-style: italic;
  letter-spacing: 0.3px;
  margin-bottom: var(--spacing-xl);
}

.hero-subtitle em {
  font-style: italic;
  font-weight: 500;
  color: #E1DFD9;
}

.hero-divider {
  width: 40px;
  height: 2px;
  background: var(--color-gold);
  margin: 0 auto;
}

/* --- Main Content ----------------------------------------- */
.main-content {
  flex: 1;
  padding: var(--spacing-2xl) var(--spacing-xl);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* --- Portfolio Grid --------------------------------------- */
.portfolio-grid {
  columns: 3;
  column-gap: 20px;
  animation: grid-fade-in 0.8s ease 0.2s both;
}

@keyframes grid-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  margin-bottom: 20px;
  break-inside: avoid;
}

.portfolio-image-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--color-light-gray);
}

.portfolio-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 26, 0.75);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-md);
}

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

.portfolio-caption {
  font-family: var(--font-serif-alt);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-white);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease 0.1s, transform 0.4s ease 0.1s;
}

.portfolio-item:hover .portfolio-caption {
  opacity: 1;
  transform: translateY(0);
}

/* --- Lightbox --------------------------------------------- */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.95);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: var(--spacing-lg);
  backdrop-filter: blur(4px);
}

.lightbox-overlay.open {
  display: flex;
  animation: lightbox-fade-in 0.3s ease;
}

@keyframes lightbox-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.lightbox-inner {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: lightbox-slide-in 0.35s ease;
}

@keyframes lightbox-slide-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox-inner img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.lightbox-caption {
  font-family: var(--font-serif-alt);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  line-height: 1.6;
  letter-spacing: 0.3px;
  text-align: center;
  max-width: 700px;
}

.lightbox-close {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 300;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-prev,
.lightbox-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2.5rem;
  cursor: pointer;
  padding: var(--spacing-md);
  opacity: 0.6;
  transition: opacity var(--transition-fast);
  line-height: 1;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 300;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
}

.lightbox-prev {
  left: var(--spacing-lg);
}

.lightbox-next {
  right: var(--spacing-lg);
}

/* --- Nav Toggle (Hamburger) ------------------------------- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  z-index: 10;
  position: absolute;
  right: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: #f5f3f0;
  margin: 6px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* --- Footer ----------------------------------------------- */
.footer {
  border-top: 1px solid #f0ede8;
  background: #E1DFD9;
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-top: auto;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-social a {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-dark-gray);
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.footer-social a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-black);
  transition: width var(--transition-fast);
}

.footer-social a:hover::after {
  width: 100%;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--color-taupe);
  letter-spacing: 0.05em;
  font-weight: 400;
}

/* --- Personal voice intro --------------------------------- */
.page-voice {
  font-family: var(--font-serif-alt);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-taupe);
  text-align: center;
  max-width: 860px;
  margin: 0 auto var(--spacing-2xl);
  letter-spacing: 0.3px;
}

/* --- Responsive ------------------------------------------- */
@media (max-width: 1024px) {
  .header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .logo {
    width: 100px;
    height: 100px;
  }

  .hero {
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .main-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .portfolio-grid {
    columns: 2;
    column-gap: 16px;
  }

  .portfolio-item {
    margin-bottom: 16px;
  }
}

@media (max-width: 768px) {
  .header {
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
  }

  .header-container {
    position: relative;
  }

  .header-top {
    position: relative;
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #524A3A;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.35s ease;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
  }

  .nav.open {
    max-height: 320px;
  }

  .nav ul {
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md) 0;
    align-items: center;
  }

  .nav ul li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.7rem;
  }

  .hero {
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .portfolio-grid {
    columns: 1;
    column-gap: 12px;
  }

  .portfolio-item {
    margin-bottom: 12px;
  }

  .footer {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .footer-social {
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .header {
    padding: var(--spacing-md);
  }

  .nav-toggle {
    padding: 8px;
  }

  .nav-toggle span {
    width: 18px;
  }

  .logo {
    width: 80px;
    height: 80px;
  }

  .hero {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
  }

  .hero-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-divider {
    width: 30px;
  }

  .main-content {
    padding: var(--spacing-md);
  }

  .portfolio-grid {
    columns: 1;
    column-gap: 12px;
  }

  .portfolio-item {
    margin-bottom: 12px;
  }

  .lightbox-prev,
  .lightbox-next {
    padding: var(--spacing-sm);
    font-size: 2rem;
  }

  .lightbox-close {
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2rem;
  }
}