/* ===== JOYCE LEE PORTFOLIO — Chipperfield-inspired theme ===== */

/* --- Custom Properties --- */
:root {
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f4f2;
  --color-border: #e0ddd9;
  --color-accent: #1a1a1a;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;
  --font-size-hero: 3.5rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;
  --max-width: 1200px;
  --nav-height: 60px;
  --transition: 0.3s 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-primary);
  font-weight: 300;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  letter-spacing: 0.01em;
}

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

a:hover {
  opacity: 0.6;
}

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--font-size-hero); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
  max-width: 640px;
}

.label {
  font-size: var(--font-size-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

/* --- Layout Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-bg);
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

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

.nav__logo {
  font-size: var(--font-size-base);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.nav__links a {
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav__links a.active {
  border-bottom: 1px solid var(--color-text);
  padding-bottom: 2px;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 5px);
}

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

.nav__hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -5px);
}

/* Mobile nav overlay */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  z-index: 99;
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile a {
  font-size: var(--font-size-xl);
  font-weight: 300;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* --- Hero --- */
.hero {
  margin-top: var(--nav-height);
  position: relative;
  min-height: 420px;
  background-size: cover;
  background-position: center 40%;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
  border-bottom: 1px solid var(--color-border);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.85) 40%,
    rgba(255, 255, 255, 0.3) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
}

.hero__title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: 300;
  margin-bottom: var(--spacing-xs);
}

.hero__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  max-width: 520px;
  line-height: 1.8;
}

/* --- View Toggle --- */
.view-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.view-controls__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.view-toggle {
  display: flex;
  gap: var(--spacing-sm);
}

.view-toggle button {
  background: none;
  border: none;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  letter-spacing: 0.06em;
  padding: 0;
  transition: color var(--transition);
}

.view-toggle button.active {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-text);
  padding-bottom: 1px;
}

/* --- Project Grid --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  padding: var(--spacing-lg) 0;
}

.project-card {
  display: block;
}

.project-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__image .placeholder-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-card__title {
  font-size: var(--font-size-base);
  font-weight: 400;
  margin-bottom: 4px;
}

.project-card__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

/* List view */
.projects-grid.list-view {
  grid-template-columns: 1fr;
  gap: 0;
}

.projects-grid.list-view .project-card {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-md);
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.projects-grid.list-view .project-card__image {
  aspect-ratio: 16 / 10;
  margin-bottom: 0;
}

/* --- Project Detail Page --- */
.project-page {
  margin-top: var(--nav-height);
  padding: var(--spacing-lg) 0 var(--spacing-2xl);
}

.project-page__back {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
}

.project-page__back::before {
  content: "\2190\00a0";
}

.project-page__header {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.project-page__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-xs);
}

.project-page__type {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.04em;
}

.project-page__description {
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.project-page__meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.project-page__meta-item .label {
  display: block;
  margin-bottom: 4px;
}

.project-page__meta-item span:last-child {
  font-size: var(--font-size-sm);
}

/* Project images */
.project-page__images {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.project-page__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-page__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-page__image.half {
  aspect-ratio: 4 / 3;
}

.project-page__image.hero {
  aspect-ratio: auto;
}

.project-page__image.hero img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.project-page__image-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.project-page__image .placeholder-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-page__caption {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-top: 6px;
  line-height: 1.5;
}

/* Related projects */
.related-projects {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-xl);
}

.related-projects h3 {
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-base);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.related-projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.related-projects__grid .project-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

/* --- About Page --- */
.about-page {
  margin-top: var(--nav-height);
  padding: var(--spacing-xl) 0 var(--spacing-2xl);
}

.about-page__intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  align-items: start;
}

.about-page__photo {
  width: 100%;
}

.about-page__photo img {
  width: 100%;
  height: auto;
}

.about-page__bio h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-xs);
}

.about-page__bio .label {
  margin-bottom: var(--spacing-lg);
  display: block;
}

.about-page__bio p {
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.about-page__contact {
  margin-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-page__contact a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Contact Page --- */
.contact-page {
  margin-top: var(--nav-height);
  padding: var(--spacing-2xl) 0;
  min-height: calc(100vh - var(--nav-height) - 200px);
  display: flex;
  align-items: center;
}

.contact-page__title {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
}

.contact-page__intro {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: var(--spacing-xl);
}

.contact-page__details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-page__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-page__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-page__item a {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}

.contact-page__item a:hover {
  color: var(--color-text-secondary);
}

/* About sections */
.about-section {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
}

.about-section__title {
  font-size: var(--font-size-base);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
}

.experience-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.experience-item__date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.experience-item__role {
  font-weight: 400;
  font-size: var(--font-size-base);
  margin-bottom: 4px;
}

.experience-item__org {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.experience-item__desc {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

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

.skills-group h4 {
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.skills-group li {
  font-size: var(--font-size-sm);
  line-height: 2;
}

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

.footer__logos {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer__logos-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer__logos-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__logos-row img {
  height: 28px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.5;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.footer__logos-row img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.footer__contact a,
.footer__copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}


/* --- Project card hover --- */
.project-card__image {
  transition: transform var(--transition);
}

.project-card:hover .project-card__image {
  transform: scale(1.02);
}

/* --- Responsive: Tablet --- */
@media (max-width: 1024px) {
  .projects-grid {
    gap: var(--spacing-sm);
  }

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

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

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
  :root {
    --font-size-hero: 2.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
  }

  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .hero {
    min-height: 320px;
  }

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

  .projects-grid.list-view .project-card {
    grid-template-columns: 1fr;
  }

  .project-page__header {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .project-page__image-row {
    grid-template-columns: 1fr;
  }

  .about-page__intro {
    grid-template-columns: 1fr;
  }

  .experience-item {
    grid-template-columns: 1fr;
    gap: var(--spacing-xs);
  }

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

  .related-projects__grid {
    grid-template-columns: 1fr;
  }

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

  .footer__logos-row img {
    height: 22px;
  }

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

  .footer__contact {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}