/* ============================================
   Ian Shultz — Bird Photography
   Clean, modern, finance-inspired aesthetic
   with dark mode support
   ============================================ */

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

:root {
  /* Light mode (default) */
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-text-muted: #999999;
  --color-accent: #2c2c2c;
  --color-border: #e8e8e8;
  --color-border-light: #f0f0f0;
  --color-overlay: rgba(0, 0, 0, 0.88);
  --color-nav-bg: rgba(250, 250, 250, 0.92);
  --color-nav-mobile-bg: rgba(250, 250, 250, 0.98);
  --color-card-shadow: rgba(0, 0, 0, 0.06);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  --container-max: 1280px;
  --container-padding: 24px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark mode */
[data-theme="dark"] {
  --color-bg: #0e0e0e;
  --color-surface: #161616;
  --color-text: #e8e8e8;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #666666;
  --color-accent: #e0e0e0;
  --color-border: #2a2a2a;
  --color-border-light: #1e1e1e;
  --color-overlay: rgba(0, 0, 0, 0.92);
  --color-nav-bg: rgba(14, 14, 14, 0.92);
  --color-nav-mobile-bg: rgba(14, 14, 14, 0.98);
  --color-card-shadow: rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

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

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

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-border-light);
}

.theme-toggle__moon {
  display: none;
}

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

[data-theme="dark"] .theme-toggle__moon {
  display: block;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.nav--scrolled {
  border-bottom-color: var(--color-border);
}

/* On the hero, make the nav transparent so it blends with the photo */
.nav--hero-visible {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.nav--hero-visible .nav__logo,
.nav--hero-visible .nav__links a,
.nav--hero-visible .theme-toggle {
  color: rgba(255, 255, 255, 0.85);
}

.nav--hero-visible .nav__links a:hover,
.nav--hero-visible .theme-toggle:hover {
  color: #fff;
}

.nav--hero-visible .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav--hero-visible .nav__toggle span {
  background: rgba(255, 255, 255, 0.85);
}

.nav--hero-visible .nav__links a::after {
  background: #fff;
}

.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav__links {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text);
  transition: width var(--transition-base);
}

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

.nav__links a:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 24px;
  padding: 4px 0;
}

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

.nav__toggle.active span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav__toggle.active span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  will-change: transform;
}

.hero__bg img {
  width: 100%;
  height: 120%;
  object-fit: cover;
  object-position: center 40%;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  /* Left-side gradient so text is readable over the water, bird visible on right */
  background:
    linear-gradient(to right, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.35) 40%, rgba(0,0,0,0.08) 70%, transparent 100%),
    linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 40%);
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: left;
  width: 100%;
  max-width: 680px;
  padding: 0 var(--container-padding);
  padding-left: max(var(--container-padding), 8vw);
  margin: 0;
  margin-left: max(var(--container-padding), 8vw);
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero__subtitle {
  font-size: 1.125rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero__cta {
  display: inline-block;
  padding: 14px 40px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #ffffff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: background var(--transition-base), border-color var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease forwards 0.8s;
}

.hero__cta:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.8);
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 2;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards 1.2s;
}

.hero__scroll span {
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: rgba(255, 255, 255, 0.4);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* --- Sections --- */
.section {
  padding: 120px 0;
}

.section__header {
  margin-bottom: 64px;
}

.section__eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

/* Fade-in for sections */
.section__header,
.about__content,
.about__image,
.contact__inner {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section__header.visible,
.about__content.visible,
.about__image.visible,
.contact__inner.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Portfolio --- */
.portfolio {
  background: var(--color-surface);
  transition: background-color 0.4s ease;
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.portfolio__item {
  position: relative;
  overflow: hidden;
  background: var(--color-border-light);
  aspect-ratio: 4 / 3;
  cursor: pointer;
  border-radius: 4px;
  box-shadow: 0 4px 20px var(--color-card-shadow);
}

.portfolio__item:hover {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

[data-theme="dark"] .portfolio__item:hover {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}

.portfolio__item--tall {
  grid-row: span 2;
  aspect-ratio: auto;
}

.portfolio__item--wide {
  grid-column: span 2;
  aspect-ratio: auto;
}

.portfolio__image-wrap {
  width: 100%;
  height: 100%;
  position: relative;
}

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

.portfolio__item:hover .portfolio__image-wrap img {
  transform: scale(1.04);
}

.portfolio__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio__item:hover .portfolio__overlay {
  opacity: 1;
}

.portfolio__overlay h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: #fff;
  margin-bottom: 4px;
}

.portfolio__overlay p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.7);
  font-weight: 300;
}

/* Fade-in on scroll — uses --reveal-delay set by JS to avoid inline style recalculation */
.portfolio__item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease var(--reveal-delay, 0s),
              transform 0.6s ease var(--reveal-delay, 0s),
              box-shadow var(--transition-base);
}

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

/* --- About --- */
.about {
  background: var(--color-bg);
  transition: background-color 0.4s ease;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--color-border-light);
  border-radius: 4px;
}

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

.about__text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.about__stats {
  display: flex;
  gap: 48px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

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

.about__stat-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.about__stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* --- Contact --- */
.contact {
  background: var(--color-surface);
  transition: background-color 0.4s ease;
}

.contact__inner {
  max-width: 640px;
  margin: 0 auto;
}

.contact__description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-top: 16px;
  line-height: 1.7;
}

.contact__form {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact__form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact__field label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.contact__field input,
.contact__field select,
.contact__field textarea {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), background-color 0.4s ease;
  outline: none;
  resize: vertical;
}

.contact__field input:focus,
.contact__field select:focus,
.contact__field textarea:focus {
  border-color: var(--color-accent);
}

.contact__field input::placeholder,
.contact__field textarea::placeholder {
  color: var(--color-text-muted);
}

.contact__submit {
  align-self: flex-start;
  padding: 14px 48px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-surface);
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  cursor: pointer;
}

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

/* --- Footer --- */
.footer {
  padding: 60px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: background-color 0.4s ease;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__logo {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 500;
}

.footer__tagline {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 4px;
}

.footer__links {
  display: flex;
  gap: 32px;
}

.footer__links a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer__copy {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 2rem;
  color: #fff;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  z-index: 10;
}

.lightbox__close:hover { opacity: 1; }

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  color: #fff;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
  z-index: 10;
  padding: 20px;
}

.lightbox__prev { left: 16px; }
.lightbox__next { right: 16px; }
.lightbox__prev:hover,
.lightbox__next:hover { opacity: 1; }

.lightbox__content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox__caption {
  margin-top: 16px;
  text-align: center;
  color: rgba(255,255,255,0.8);
  font-size: 0.875rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .portfolio__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .about__grid {
    gap: 48px;
  }

  .about__stats {
    gap: 32px;
  }

  .hero__content {
    margin-left: max(var(--container-padding), 5vw);
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 20px;
  }

  .nav__right {
    gap: 8px;
  }

  .nav__links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-nav-mobile-bg);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .nav__links.active {
    opacity: 1;
    pointer-events: auto;
  }

  .nav__links a {
    font-size: 1.25rem;
  }

  /* Override hero-visible link colors inside active mobile menu */
  .nav--hero-visible .nav__links.active a {
    color: var(--color-text-secondary);
  }

  .nav__toggle {
    display: flex;
    z-index: 101;
  }

  .section {
    padding: 80px 0;
  }

  .portfolio__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .portfolio__item--wide {
    grid-column: span 1;
  }

  .portfolio__item--tall {
    grid-row: span 1;
    aspect-ratio: 4 / 3;
  }

  .hero__overlay {
    background:
      linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.2) 40%, rgba(0,0,0,0.5) 100%);
  }

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

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about__image {
    aspect-ratio: 16 / 9;
  }

  .about__stats {
    gap: 24px;
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .lightbox__prev,
  .lightbox__next {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero__cta {
    padding: 12px 32px;
  }

  .about__stats {
    flex-direction: column;
    gap: 20px;
  }
}