/* ============================================================
   Studio Lumiere — Architecture Photography Portfolio
   Main Stylesheet
   ============================================================ */

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

:root {
  --color-bg:          #ffffff;
  --color-bg-dark:     #0a0a0a;
  --color-bg-off:      #f5f5f5;
  --color-text:        #1a1a1a;
  --color-text-muted:  #6b6b6b;
  --color-text-light:  #ffffff;
  --color-accent:      #d4af37;
  --color-border:      #e0e0e0;
  --color-overlay:     rgba(10, 10, 10, 0.72);

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

  --spacing-xs:        0.5rem;
  --spacing-sm:        1rem;
  --spacing-md:        2rem;
  --spacing-lg:        4rem;
  --spacing-xl:        6rem;
  --spacing-2xl:       8rem;

  --transition-base:   0.3s ease;
  --transition-slow:   0.6s ease;

  --nav-height:        80px;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

/* ─── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav--dark {
  /* Used on hero — transparent over dark image */
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: opacity var(--transition-base);
}

.nav__logo:hover {
  opacity: 0.75;
}

.nav__logo img {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

.nav--scrolled .nav__logo-text {
  color: var(--color-text);
}

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

.nav__link {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-light);
  transition: color var(--transition-base), opacity var(--transition-base);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition-base);
}

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

.nav__link:hover {
  opacity: 0.75;
}

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

/* Contact page nav is always scrolled style */
.nav--light {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav--light .nav__logo-text,
.nav--light .nav__link {
  color: var(--color-text);
}

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

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

.nav--scrolled .nav__hamburger span,
.nav--light .nav__hamburger span {
  background: var(--color-text);
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ─── Hero Section ────────────────────────────────────────── */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg-dark);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/modern_architecture_1.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: heroBgFade 1.4s ease forwards 0.2s;
  transform: scale(1.04);
  transition: transform 8s ease;
}

.hero__bg--loaded {
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 10, 0.35) 0%,
    rgba(10, 10, 10, 0.55) 50%,
    rgba(10, 10, 10, 0.7) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-text-light);
  opacity: 0;
  animation: heroContentFade 1s ease forwards 0.8s;
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-md);
}

.hero__subtitle {
  font-size: clamp(0.875rem, 1.5vw, 1.0625rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.75);
  max-width: 420px;
  margin: 0 auto var(--spacing-lg);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-light);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 4px;
  transition: color var(--transition-base), border-color var(--transition-base);
}

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

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.55), transparent);
}

@keyframes heroBgFade {
  to { opacity: 1; }
}

@keyframes heroContentFade {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ─── Gallery Section ─────────────────────────────────────── */
.gallery-section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--color-bg);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.section-eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.section-divider {
  width: 48px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--spacing-sm) auto 0;
}

/* Masonry grid */
.gallery-grid {
  max-width: 1400px;
  margin: 0 auto;
  columns: 3;
  column-gap: 20px;
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-off);
}

.gallery-item__img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 1.75rem;
  opacity: 0;
  transition: opacity 0.4s ease;
}

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

.gallery-item:hover .gallery-item__img {
  transform: scale(1.06);
}

.gallery-item__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-bottom: 6px;
  transform: translateY(8px);
  transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-item__title {
  transform: translateY(0);
}

.gallery-item__meta {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  transform: translateY(8px);
  transition: transform 0.4s ease 0.05s;
}

.gallery-item:hover .gallery-item__meta {
  transform: translateY(0);
}

.gallery-item__view {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.gallery-item:hover .gallery-item__view {
  opacity: 1;
  transform: scale(1);
}

.gallery-item__view svg {
  width: 16px;
  height: 16px;
  stroke: white;
  fill: none;
}

/* ─── Lightbox ────────────────────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.95);
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
  animation: lightboxFade 0.3s ease;
}

@keyframes lightboxFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

.lightbox__img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  display: block;
  animation: lightboxImgFade 0.35s ease;
}

@keyframes lightboxImgFade {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

.lightbox__caption {
  margin-top: var(--spacing-sm);
  text-align: center;
  color: rgba(255,255,255,0.7);
}

.lightbox__caption-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-light);
}

.lightbox__caption-meta {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: 4px;
}

.lightbox__close {
  position: fixed;
  top: 1.5rem;
  right: 1.75rem;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.lightbox__close:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.1);
}

.lightbox__close svg {
  width: 18px;
  height: 18px;
  stroke: white;
  fill: none;
}

.lightbox__nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.lightbox__nav:hover {
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.08);
}

.lightbox__nav svg {
  width: 20px;
  height: 20px;
  stroke: white;
  fill: none;
}

.lightbox__prev {
  left: 1.5rem;
}

.lightbox__next {
  right: 1.5rem;
}

.lightbox__counter {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.45);
}

/* ─── About Strip ─────────────────────────────────────────── */
.about-strip {
  padding: var(--spacing-xl) var(--spacing-lg);
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}

.about-strip__inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-strip__label {
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.about-strip__heading {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
  line-height: 1.3;
}

.about-strip__text {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
}

.about-strip__text p + p {
  margin-top: var(--spacing-sm);
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  padding: var(--spacing-lg) var(--spacing-lg);
  background: #050505;
  color: rgba(255,255,255,0.4);
}

.footer__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.04em;
}

.footer__copy {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

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

.footer__social-link {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-base);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
}

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

/* ─── Contact Page ────────────────────────────────────────── */
.contact-hero {
  padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-lg) var(--spacing-xl);
  background: var(--color-bg-off);
  text-align: center;
}

.contact-hero__eyebrow {
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.contact-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.contact-hero__subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.7;
}

.contact-main {
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.contact-main__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-form__title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

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

.form-group--row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.form-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 1rem 0;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  outline: none;
  transition: border-color var(--transition-base);
  -webkit-appearance: none;
  border-radius: 0;
}

.form-input:focus,
.form-textarea:focus {
  border-bottom-color: var(--color-text);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-border);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.form-input.invalid,
.form-textarea.invalid {
  border-bottom-color: #c0392b;
}

.form-error {
  font-size: 0.75rem;
  color: #c0392b;
  display: none;
}

.form-error.visible {
  display: block;
}

.form-submit {
  margin-top: var(--spacing-sm);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 1.125rem 2.5rem;
  background: var(--color-text);
  color: var(--color-text-light);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-base);
  align-self: flex-start;
}

.form-submit:hover {
  background: #2a2a2a;
}

.form-submit:active {
  transform: translateY(1px);
}

.form-submit svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  transition: transform var(--transition-base);
}

.form-submit:hover svg {
  transform: translateX(4px);
}

.form-success {
  display: none;
  padding: var(--spacing-md);
  background: #f0faf0;
  border-left: 3px solid #27ae60;
  color: #1e7e34;
  font-size: 0.9375rem;
}

.form-success.visible {
  display: block;
}

/* Contact Info */
.contact-info {
  padding-top: 3.5rem;
}

.contact-info__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 400;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  letter-spacing: 0.02em;
}

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

.contact-info__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-info__label {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.contact-info__value {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.5;
}

.contact-info__value a {
  color: var(--color-text);
  transition: color var(--transition-base);
}

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

.contact-divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-2xl) auto;
  max-width: 1100px;
}

/* ─── AOS override for fade-up ────────────────────────────── */
[data-aos="fade-up"] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-aos="fade-up"].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .gallery-grid {
    columns: 2;
  }

  .about-strip__inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .contact-main__inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .contact-info {
    padding-top: 0;
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
  }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(10,10,10,0.97);
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) 0;
    gap: var(--spacing-lg);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__link {
    font-size: 1rem;
    color: var(--color-text-light) !important;
  }

  .nav__hamburger {
    display: flex;
  }

  .gallery-grid {
    columns: 1;
  }

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

  .footer__social {
    justify-content: center;
  }

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

  .lightbox__prev { left: 0.5rem; }
  .lightbox__next { right: 0.5rem; }

  .hero__scroll {
    display: none;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    columns: 1;
    column-gap: 0;
  }
  .gallery-item {
    margin-bottom: 12px;
  }
}