/* ============================================
   Lewis Clegg — Portfolio
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Palette */
  --bg:              #f3f3f0;
  --bg-alt:          #eaeae6;
  --text:            #1c1c1c;
  --text-secondary:  #6e6e6e;
  --text-tertiary:   #878785;
  --border:          #d8d8d4;
  --accent:          #ffd000;
  --card-shadow:     rgba(40, 50, 60, 0.05);
  --card-shadow-hover: rgba(40, 50, 60, 0.12);
  --nav-bg:          rgba(243, 243, 240, 0.92);
  --overlay:         rgba(243, 243, 240, 0.95);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --text-h1:      clamp(2rem, 4vw, 3.5rem);
  --text-h2:      clamp(1.3rem, 2.2vw, 1.8rem);
  --text-body:    clamp(0.95rem, 1.1vw, 1.05rem);
  --text-small:   clamp(0.8rem, 0.9vw, 0.875rem);
  --text-label:   clamp(0.7rem, 0.75vw, 0.78rem);

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 10rem;

  /* Layout */
  --max-width:   1200px;
  --nav-height:  90px;

  /* Transitions */
  --ease-out:  cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --bg:              #141414;
  --bg-alt:          #1e1e1e;
  --text:            #e5e5e2;
  --text-secondary:  #8a8a88;
  --text-tertiary:   #6a6a68;
  --border:          #2a2a28;
  --accent:          #ffd000;
  --card-shadow:     rgba(0, 0, 0, 0.15);
  --card-shadow-hover: rgba(0, 0, 0, 0.3);
  --nav-bg:          rgba(20, 20, 20, 0.92);
  --overlay:         rgba(20, 20, 20, 0.95);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

::selection {
  background-color: var(--accent);
  color: #1c1c1c;
}

/* Skip to content */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #1c1c1c;
  padding: 0.5rem 1.25rem;
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 600;
  z-index: 200;
  border-radius: 0 0 4px 4px;
  transition: top 0.2s var(--ease-smooth);
}

.skip-link:focus {
  top: 0;
}

/* Focus indicators */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background-color 0.3s var(--ease-smooth),
              border-color 0.3s var(--ease-smooth);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background-color: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  transition: opacity 0.2s var(--ease-smooth);
}

.nav__logo:hover {
  opacity: 0.8;
}

.nav__logo-img {
  height: 75px;
  width: 75px;
  border-radius: 50%;
}

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

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

/* Sliding underline indicator */
.nav__indicator {
  position: absolute;
  bottom: 0;
  height: 2px;
  background-color: var(--accent);
  transition: left 0.35s var(--ease-smooth),
              width 0.35s var(--ease-smooth),
              opacity 0.25s var(--ease-smooth);
  pointer-events: none;
  opacity: 0;
  border-radius: 1px;
}

.nav__links:hover .nav__indicator,
.nav__links .nav__indicator--active {
  opacity: 1;
}

.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s var(--ease-smooth);
}

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

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

/* Nav actions (theme toggle, social icon) */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: background-color 0.2s var(--ease-smooth);
}

.nav__social:hover {
  background-color: var(--bg-alt);
}

.nav__social svg {
  width: 16px;
  height: 16px;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: background-color 0.2s var(--ease-smooth);
}

.theme-toggle:hover {
  background-color: var(--bg-alt);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}

.theme-toggle__sun { display: block; }
.theme-toggle__moon { display: none; }

[data-theme="dark"] .theme-toggle__sun { display: none; }
[data-theme="dark"] .theme-toggle__moon { display: block; }

/* Mobile menu button */
.nav__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 5px;
}

.nav__menu-btn span {
  display: block;
  width: 20px;
  height: 1.5px;
  background-color: var(--text);
  transition: transform 0.3s var(--ease-out),
              opacity 0.2s;
  transform-origin: center;
}

.nav--open .nav__menu-btn span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav--open .nav__menu-btn span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 99;
}

.nav--open .nav__mobile-menu {
  display: flex;
}

.nav__mobile-menu .nav__link {
  font-size: var(--text-h2);
  font-weight: 700;
}

/* --- Homepage: Project Grid --- */
.work {
  padding-top: calc(var(--nav-height) + var(--space-lg));
  padding-bottom: var(--space-2xl);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.project-card {
  display: block;
  transition: transform 0.3s var(--ease-out);
}

.project-card__image-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  background-color: var(--bg-alt);
  box-shadow: 0 2px 12px var(--card-shadow);
  transition: box-shadow 0.4s var(--ease-out);
}

.project-card:hover .project-card__image-wrap {
  box-shadow: 0 8px 30px var(--card-shadow-hover);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease-out);
}

.project-card:hover .project-card__image {
  transform: scale(1.03);
}

/* Placeholder for failed image loads */
.project-card__placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.15);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-top: var(--space-sm);
  position: relative;
  display: inline;
  padding: 0.1em 0.3em;
  margin-left: -0.3em;
  z-index: 0;
  transition: color 0.25s var(--ease-smooth);
}

.project-card__title::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 85%;
  background: var(--accent);
  z-index: -1;
  transform: scaleX(0) rotate(-0.5deg);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-smooth);
}

.project-card:hover .project-card__title {
  color: #333;
}

.project-card:hover .project-card__title::before {
  transform: scaleX(1) rotate(-0.5deg);
}

/* --- Project Page --- */
.project-page {
  padding-top: calc(var(--nav-height) + var(--space-lg));
}

.project-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-lg);
  transition: color 0.2s var(--ease-smooth);
}

.project-back {
  position: relative;
}

.project-back::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-smooth);
}

.project-back:hover {
  color: var(--text);
}

.project-back:hover::after {
  transform: scaleX(1);
}

.project-back svg {
  width: 16px;
  height: 16px;
}

.project-header {
  margin-bottom: var(--space-xl);
}

.project-header__title {
  font-size: var(--text-h1);
}

.project-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  flex-wrap: wrap;
}

.project-header__subtitle {
  font-size: var(--text-body);
  color: var(--text-secondary);
}

.project-header__year {
  font-size: var(--text-small);
  color: var(--text-tertiary);
}

.project-header__divider {
  color: var(--text-tertiary);
}

.project-hero-image {
  width: 100%;
  margin-bottom: var(--space-xl);
}

.project-hero-image img,
.project-hero-image .project-card__placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.project-description {
  max-width: 680px;
  margin-bottom: var(--space-xl);
}

.project-description p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  line-height: 1.75;
}

.project-description p:first-child {
  color: var(--text);
  font-size: calc(var(--text-body) * 1.1);
}

/* Gallery layouts */
.project-gallery {
  margin-bottom: var(--space-2xl);
}

.project-gallery--single {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.project-gallery--grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.project-gallery--grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.project-gallery__item {
  width: 100%;
  overflow: hidden;
  background-color: var(--bg-alt);
}

.project-gallery__item img {
  width: 100%;
  display: block;
}

.project-gallery__item .project-card__placeholder {
  aspect-ratio: 4 / 3;
}

/* Next project */
.project-next {
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0 var(--space-2xl);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.project-next__link {
  display: block;
  transition: color 0.2s var(--ease-smooth);
}

.project-next__link--prev {
  text-align: left;
}

.project-next__link--next {
  text-align: right;
  margin-left: auto;
}

.project-next__label {
  font-size: var(--text-label);
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-xs);
}

.project-next__title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 700;
  position: relative;
  display: inline;
  padding: 0.05em 0.2em;
  margin-left: -0.2em;
  z-index: 0;
  transition: color 0.25s var(--ease-smooth);
}

.project-next__title::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 80%;
  background: var(--accent);
  z-index: -1;
  transform: scaleX(0) rotate(-0.5deg);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-smooth);
}

.project-next__link:hover .project-next__title {
  color: #333;
}

.project-next__link:hover .project-next__title::before {
  transform: scaleX(1) rotate(-0.5deg);
}

/* --- About Page --- */
.about {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-2xl);
}

.about__header {
  margin-bottom: var(--space-xl);
}

.about__title {
  font-size: var(--text-h1);
  margin-bottom: var(--space-sm);
}

.about__intro {
  font-size: calc(var(--text-body) * 1.15);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.about__photo {
  aspect-ratio: 3 / 4;
  background-color: var(--bg-alt);
  overflow: hidden;
}

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

.about__body p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  line-height: 1.75;
}

.about__body p:first-child {
  color: var(--text);
}

.about__services {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.about__services h3 {
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.about__services-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.about__services-list li {
  font-size: var(--text-small);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 0.4em 1em;
  border-radius: 2px;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: color 0.2s var(--ease-smooth),
              background-color 0.2s var(--ease-smooth);
  color: var(--text-secondary);
}

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

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__nav {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.footer__nav a {
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease-smooth);
}

.footer__nav a {
  position: relative;
}

.footer__nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-smooth);
}

.footer__nav a:hover {
  color: var(--text);
}

.footer__nav a:hover::after {
  transform: scaleX(1);
}

.footer__copyright {
  font-size: var(--text-label);
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

/* --- Animations --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out),
              transform 0.7s var(--ease-out);
}

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

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.24s; }

/* Image lazy reveal */
.img-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

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

/* --- Responsive --- */

/* Tablet and up */
@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr 1.4fr;
    gap: var(--space-xl);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

/* Mobile */
@media (max-width: 767px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .project-gallery--grid-2 {
    grid-template-columns: 1fr;
  }

  .project-gallery--grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .project-next {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .project-next__link--next {
    text-align: left;
    margin-left: 0;
  }
}

/* Mobile nav */
@media (max-width: 639px) {
  .nav__links {
    display: none;
  }

  .nav__menu-btn {
    display: flex;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}