/* ==========================================================================
   ARCHITECTURAL PORTFOLIO — STYLES
   Chukwuemelie Omemgboji Nzube
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors — Brand Palette */
  --color-paper: #f8f6f3;
  --color-paper-dark: #efede9;
  --color-ink: #1c1c1c;
  --color-ink-light: #2e2e2e;
  --color-concrete: #7a7a7a;
  --color-concrete-light: #a8a8a8;
  --color-rule: #eaeaea;
  --color-accent: #99a7ef;
  --color-accent-hover: #7b8bd0;

  /* Helper variables for theme-responsive transparency and shadows */
  --color-caption-bg: rgba(153, 167, 239, 0.12);
  --color-nav-shadow: rgba(0, 0, 0, 0.08);

  /* Typography Scale */
  --font-display: "Space Grotesk", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --text-xs: 0.75rem; /* 12px */
  --text-sm: 0.875rem; /* 14px */
  --text-base: 1rem; /* 16px */
  --text-lg: 1.125rem; /* 18px */
  --text-xl: 1.25rem; /* 20px */
  --text-2xl: 1.5rem; /* 24px */
  --text-3xl: 2rem; /* 32px */
  --text-4xl: 2.5rem; /* 40px */
  --text-5xl: 3.5rem; /* 56px */

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --sidebar-width: 200px;
  --content-max-width: 900px;
  --border-width: 1px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* --------------------------------------------------------------------------
   Dark Mode Override Colors
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --color-paper: #1c1b18;          /* Warm dark background */
  --color-paper-dark: #262521;     /* Slightly lighter dark for components/placeholders */
  --color-ink: #f8f6f3;            /* Soft off-white for primary text */
  --color-ink-light: #d1cdc7;      /* Warm light gray for body/secondary text */
  --color-concrete: #999388;       /* Medium warm gray */
  --color-concrete-light: #5c5750; /* Muted darker gray */
  --color-rule: #33312c;           /* Subtle dark divider lines */
  --color-accent: #abb7f5;         /* Brighter lavender for better contrast */
  --color-accent-hover: #c0c9f8;   /* Lavender hover */

  --color-caption-bg: rgba(171, 183, 245, 0.12);
  --color-nav-shadow: rgba(0, 0, 0, 0.35);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-paper);
}

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

ul,
ol {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   Top Navigation Bar
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-paper);
  z-index: 100;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
}

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

.navbar-brand-image {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 50%;
  flex-shrink: 0;
}

.logo-initials {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-accent);
}

.logo-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-left: auto;
  margin-right: var(--space-lg);
}

.nav-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--color-accent);
}

.nav-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  transition: color var(--transition-fast);
}

.nav-link:hover .nav-number,
.nav-link.active .nav-number {
  color: var(--color-accent);
}

.nav-label {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
}

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

.theme-toggle-btn {
  background: transparent;
  border: var(--border-width) solid var(--color-rule);
  color: var(--color-ink);
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(153, 167, 239, 0.05);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 2px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn:hover svg {
  transform: rotate(15deg);
}

/* Toggle visibility of sun/moon icons based on theme attribute */
[data-theme="light"] .theme-toggle-btn .sun-icon {
  display: none;
}
[data-theme="dark"] .theme-toggle-btn .moon-icon {
  display: none;
}

/* --------------------------------------------------------------------------
   Mobile Navigation
   -------------------------------------------------------------------------- */
.mobile-nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: var(--border-width) solid var(--color-rule);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.hamburger-line {
  display: block;
  width: 18px;
  height: 1px;
  background-color: var(--color-ink);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
}

.mobile-nav-toggle.active .hamburger-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.mobile-nav-toggle.active .hamburger-line:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.mobile-nav-menu {
  display: none;
  background-color: var(--color-paper);
  padding: var(--space-lg) var(--space-xl);
  max-height: 0;
  overflow: hidden;
  transition:
    max-height var(--transition-base),
    padding var(--transition-base);
}

.mobile-nav-menu.active {
  max-height: 300px;
  padding: var(--space-lg) var(--space-xl);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--text-base);
  transition: color var(--transition-fast);
}

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

.mobile-nav-link .nav-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
}

.mobile-nav-link .nav-label {
  font-size: var(--text-base);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
.main-content {
  padding-top: 70px; /* Height of navbar */
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding: var(--space-4xl) var(--space-3xl) var(--space-3xl);
  max-width: 1100px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-3xl);
  align-items: start;
}

.hero-text-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.hero-name {
  font-size: var(--text-4xl);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-meta-block {
  padding-top: var(--space-lg);
}

.hero-title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-lg);
}

.hero-intro {
  font-size: var(--text-lg);
  color: var(--color-ink-light);
  max-width: 500px;
}

/* Profile Photo - Right Side */
.hero-photo {
  width: 100%;
  justify-self: end;
}

.profile-placeholder {
  width: 100%;
}

.profile-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: var(--border-width) solid var(--color-rule);
  background-color: var(--color-paper-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.profile-placeholder figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  margin-top: var(--space-sm);
  padding-left: var(--space-sm);
  border-left: 2px solid var(--color-accent);
}

/* When real profile image is added */
.hero-photo img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(20%);
  transition: filter var(--transition-base);
}

.hero-photo:hover img {
  filter: grayscale(0%);
}

/* --------------------------------------------------------------------------
   Section Layout
   -------------------------------------------------------------------------- */
.section {
  padding: var(--space-3xl) var(--space-3xl) var(--space-2xl);
  max-width: var(--content-max-width);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.section-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.1em;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section-rule {
  margin-top: var(--space-3xl);
  height: var(--border-width);
  background-color: var(--color-rule);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.about-text {
  max-width: 600px;
}

.about-statement {
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: var(--space-lg);
}

.about-text p {
  color: var(--color-ink-light);
  margin-bottom: var(--space-md);
}

.about-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
}

.detail-block {
  padding-top: var(--space-md);
}

.detail-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-concrete);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.detail-list li {
  font-size: var(--text-sm);
  color: var(--color-ink-light);
  padding: var(--space-xs) 0;
}

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

.detail-list--inline li {
  padding: 0;
}

.qualification {
  margin-bottom: var(--space-md);
}

.qualification-degree {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.qualification-school {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-ink-light);
}

.qualification-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
}

/* --------------------------------------------------------------------------
   Projects Section
   -------------------------------------------------------------------------- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4xl);
}

.project {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: var(--space-xl);
}

.project-number-col {
  padding-top: var(--space-xs);
}

.project-number {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 500;
  color: var(--color-accent);
  opacity: 0.4;
  transition: opacity var(--transition-base);
}

.project:hover .project-number {
  opacity: 1;
}

.project-content {
  padding-top: var(--space-lg);
}

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

.project-title {
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
}

.project-subtitle {
  font-size: var(--text-sm);
  color: var(--color-concrete);
  font-style: italic;
  margin-bottom: var(--space-md);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  margin-top: var(--space-md);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.meta-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.meta-value {
  font-size: var(--text-sm);
  color: var(--color-ink-light);
}

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

.project-description p {
  font-size: var(--text-base);
  color: var(--color-ink-light);
  line-height: 1.7;
  max-width: 600px;
}

/* Project Image Placeholders */
.project-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  align-items: start;
}

.image-placeholder {
  width: 100%;
}

.placeholder-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: var(--border-width) solid var(--color-rule);
  background-color: var(--color-paper-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.placeholder-diagonal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom right,
    transparent calc(50% - 0.5px),
    var(--color-rule) calc(50% - 0.5px),
    var(--color-rule) calc(50% + 0.5px),
    transparent calc(50% + 0.5px)
  );
}

.placeholder-label {
  position: relative;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--color-paper-dark);
  padding: var(--space-sm) var(--space-md);
}

.image-placeholder figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  margin-top: var(--space-sm);
  padding-left: var(--space-sm);
  border-left: 2px solid var(--color-accent);
}

/* When real images are added */
.image-placeholder img {
  width: 100%;
  height: auto;
  display: block;
}

/* Project Image Figure */
.project-image-figure {
  width: 100%;
}

.project-image-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  border: var(--border-width) solid var(--color-rule);
}

.project-gallery-caption {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-ink);
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-accent);
  background: var(--color-caption-bg);
  display: block;
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   View More Button
   -------------------------------------------------------------------------- */
.view-more-wrapper {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
}

.view-more-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  border: var(--border-width) solid var(--color-ink);
  background-color: transparent;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  transition:
    background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.view-more-btn:hover {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.view-more-arrow {
  transition: transform var(--transition-base);
}

.view-more-btn:hover .view-more-arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Projects Page Header
   -------------------------------------------------------------------------- */
.page-header {
  padding: var(--space-3xl) var(--space-3xl) var(--space-2xl);
  max-width: var(--content-max-width);
}

.page-header-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-concrete);
  transition: color var(--transition-fast);
}

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

.page-title {
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: var(--space-md);
}

.page-subtitle {
  font-size: var(--text-base);
  color: var(--color-ink-light);
  max-width: 500px;
}

.projects-page-section {
  padding-top: var(--space-2xl);
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.contact-intro {
  max-width: 400px;
}

.contact-intro p {
  font-size: var(--text-lg);
  color: var(--color-ink-light);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-lg);
  padding: var(--space-md) 0;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding-top: 2px;
}

.contact-value {
  font-size: var(--text-base);
  color: var(--color-ink);
  transition: color var(--transition-fast);
  word-break: break-word;
}

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

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  margin-top: var(--space-4xl);
  padding: var(--space-2xl) var(--space-3xl);
  max-width: var(--content-max-width);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-name {
  font-size: var(--text-sm);
  font-weight: 500;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete);
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  opacity: 0.9;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast);
}

.social-link img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  border-radius: 0;
}

[data-theme="dark"] .social-link img {
  filter: invert(1) brightness(0.9);
}

.social-link:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-concrete-light);
  margin-top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Responsive — Tablet
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-section,
  .section,
  .footer {
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }

  .hero-grid {
    grid-template-columns: 1fr 220px;
    gap: var(--space-xl);
  }

  .hero-name {
    font-size: var(--text-3xl);
  }

  .logo-name {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Responsive — Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  /* Navbar adjustments */
  .navbar-inner {
    padding: var(--space-md) var(--space-lg);
  }

  .nav-list {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .mobile-nav-menu {
    display: block;
    max-height: 0;
    padding: 0 var(--space-lg);
  }

  .mobile-nav-menu.active {
    max-height: 300px;
    padding: var(--space-lg);
  }

  /* Page header adjustments */
  .page-header {
    padding: var(--space-2xl) var(--space-lg);
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  /* Hero adjustments */
  .hero-section {
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero-photo {
    order: -1; /* Photo appears first on mobile */
    max-width: 180px;
    justify-self: start;
  }

  .hero-name {
    font-size: var(--text-2xl);
  }

  .hero-intro {
    font-size: var(--text-base);
  }

  /* Section adjustments */
  .section {
    padding: var(--space-2xl) var(--space-lg);
  }

  .section-header {
    flex-direction: column;
    gap: var(--space-sm);
  }

  /* About adjustments */
  .about-details {
    grid-template-columns: 1fr;
  }

  /* Project adjustments */
  .project {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .project-number-col {
    padding-top: 0;
  }

  .project-number {
    font-size: var(--text-xl);
  }

  .project-meta {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .meta-item {
    flex-direction: row;
    gap: var(--space-md);
    align-items: baseline;
  }

  .meta-label {
    min-width: 70px;
  }

  /* Contact adjustments */
  .contact-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .contact-label {
    padding-top: 0;
  }

  /* Footer adjustments */
  .footer {
    padding: var(--space-xl) var(--space-lg);
  }
}

/* --------------------------------------------------------------------------
   Responsive — Small Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .hero-name {
    font-size: var(--text-xl);
  }

  .hero-photo {
    max-width: 160px;
  }

  .section-title {
    font-size: var(--text-xl);
  }

  .project-title {
    font-size: var(--text-lg);
  }

  .placeholder-frame {
    aspect-ratio: 4 / 3;
  }
}

/* --------------------------------------------------------------------------
   Animations & Transitions
   -------------------------------------------------------------------------- */

/* Project entrance animation */
.project {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

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

/* Staggered animation for multiple projects */
.project:nth-child(2) {
  transition-delay: 0.1s;
}

.project:nth-child(3) {
  transition-delay: 0.15s;
}

.project:nth-child(4) {
  transition-delay: 0.2s;
}

.project:nth-child(5) {
  transition-delay: 0.25s;
}

.project:nth-child(n + 6) {
  transition-delay: 0.3s;
}

/* Navbar scroll state */
.navbar {
  transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 2px 20px var(--color-nav-shadow);
}

/* Page load animation */
body:not(.is-loaded) .main-content {
  opacity: 0;
}

body.is-loaded .main-content {
  animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* Image smooth loading */
.project-image-figure img {
  transition: opacity 0.4s ease;
}

/* Hover animations improvement */
.project-number {
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hero photo animation */
.hero-photo img {
  transition: filter 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Mobile menu smooth animation */
.mobile-nav-menu {
  transition:
    max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    padding 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.35s ease;
  opacity: 0;
}

.mobile-nav-menu.active {
  opacity: 1;
}

/* Hamburger animation improvement */
.hamburger-line {
  transition:
    transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.3s ease;
}

/* Loading text animation */
.loading-text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-concrete);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .sidebar,
  .mobile-nav-toggle {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }

  .section {
    page-break-inside: avoid;
  }

  .project {
    page-break-inside: avoid;
    opacity: 1;
    transform: none;
  }
}