/* styles/layout.css */
/* Layout systems, sections, and responsive grids */

/* ============================== Navigation Layout ============================== */

nav {
  position: fixed;
  inset: 0 auto auto 0;
  right: 0;
  z-index: var(--z-header);
  backdrop-filter: saturate(1.1) blur(10px);
  background: rgba(233, 238, 245, 0.55);
  border-bottom: 1px solid #dde6f2;
  transition: background 0.3s ease;
}

nav.scrolled {
  background: rgba(233, 238, 245, 0.8);
}

.nav-container {
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.site-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  border: 2px solid #eaf0f8;
  box-shadow: 6px 6px 12px var(--neu-dark), -6px -6px 12px var(--neu-light);
  object-fit: cover;
  transition: var(--t);
}

.site-avatar:hover {
  transform: scale(1.06) rotate(3deg);
}

.logo-text {
  font-weight: 800;
  font-size: var(--text-2xl);
  color: transparent;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  -webkit-background-clip: text;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}

/* Mobile navigation */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--navbar-height);
    left: -100%;
    width: 100%;
    height: calc(100dvh - var(--navbar-height));
    backdrop-filter: blur(8px);
    background: rgba(233, 238, 245, 0.95);
    flex-direction: column;
    align-items: center;
    padding-top: 1.25rem;
    transition: left 0.25s ease;
    z-index: 999;
  }
  
  .nav-links.active {
    left: 0;
  }
}

/* ============================== Section Layout ============================== */

section {
  padding: var(--space-3xl) 0;
  position: relative;
  scroll-margin-top: calc(var(--navbar-height) + 16px);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3rem);
  color: transparent;
  background: linear-gradient(90deg, #0f172a, var(--text));
  -webkit-background-clip: text;
  background-clip: text;
}

/* ============================== Hero Section ============================== */

#home {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.hero-content {
  text-align: center;
  z-index: var(--z-content);
  width: 100%;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  line-height: 1.1;
}

.gradient-text {
  color: transparent;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-dim);
  font-size: var(--text-lg);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-socials {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* ============================== Content Sections ============================== */

.about-content,
.contact-content {
  max-width: 850px;
  margin: 0 auto;
  text-align: center;
}

.about-text {
  padding: 2.25rem;
  border-radius: var(--neu-radius);
  background: var(--bg);
  box-shadow: var(--neu-out);
  color: var(--text-dim);
  font-size: var(--text-lg);
  line-height: 1.7;
}

.contact-content {
  max-width: 620px;
}

.contact-info {
  padding: var(--space-xl);
  border-radius: var(--neu-radius);
  background: var(--bg);
  box-shadow: var(--neu-out);
}

.contact-item {
  margin-bottom: var(--space-lg);
  font-size: var(--text-lg);
}

.muted {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

/* ============================== Grid Systems ============================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

/* Responsive grid adjustments */
@media (max-width: 640px) {
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (min-width: 1200px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Two column grid for economics/glossary pages */
.two-column-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

@media (max-width: 768px) {
  .two-column-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* ============================== Footer Layout ============================== */

footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid #e1e8f4;
  background: linear-gradient(145deg, #e8edf4, #f4f7fb);
  margin-top: var(--space-3xl);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

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

.footer-links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  background: var(--bg);
  box-shadow: var(--neu-out);
  transition: var(--t);
  font-size: var(--text-sm);
}

.footer-links a:hover {
  box-shadow: var(--neu-inset);
  color: #0f172a;
}

/* Mobile footer adjustments */
@media (max-width: 768px) {
  .footer-content {
    justify-content: center;
    text-align: center;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
  }
  
  .footer-links {
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: nowrap;
  }
  
  .footer-links a {
    font-size: var(--text-xs);
    padding: 0.35rem 0.55rem;
  }
}

/* ============================== Accordion Layout ============================== */

.accordion {
  max-width: 900px;
  margin: 0 auto;
}

/* ============================== Responsive Layout Adjustments ============================== */

/* Container responsive padding */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }
  
  section {
    padding: var(--space-2xl) 0;
  }
  
  .hero-socials {
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  section {
    padding: var(--space-xl) 0;
  }
}

/* ============================== Content Width Constraints ============================== */

/* Prevent very wide content on large screens */
.content-wrapper {
  max-width: 65ch; /* Optimal reading width */
  margin: 0 auto;
}

.wide-content {
  max-width: 80ch;
  margin: 0 auto;
}

/* ============================== Scroll Margin for Fixed Header ============================== */

/* Ensure all anchor links account for fixed navbar */
section[id],
.scroll-target {
  scroll-margin-top: calc(var(--navbar-height) + var(--space-lg));
}

/* ============================== Layout Utilities ============================== */

/* Aspect ratio containers */
.aspect-video {
  aspect-ratio: 16/9;
}

.aspect-square {
  aspect-ratio: 1/1;
}

.aspect-portrait {
  aspect-ratio: 3/4;
}

/* Sticky positioning */
.sticky-top {
  position: sticky;
  top: var(--navbar-height);
}

/* Full width sections */
.section-full-width {
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

/* Content spacing */
.content-spacing > * + * {
  margin-top: var(--space-lg);
}

.tight-spacing > * + * {
  margin-top: var(--space-sm);
}

.loose-spacing > * + * {
  margin-top: var(--space-xl);
}

/* ============================== Print Layout ============================== */

@media print {
  nav,
  footer,
  .toggle-group,
  .scroll-indicator {
    display: none !important;
  }
  
  section {
    padding: var(--space-lg) 0;
    page-break-inside: avoid;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .project-card {
    break-inside: avoid;
  }
}

/* ============================== Layout Animations ============================== */

/* Smooth transitions for layout changes */
.nav-container,
.footer-content,
.projects-grid {
  transition: all 0.3s ease;
}

/* Layout shift prevention */
.layout-stable {
  contain: layout style;
}

/* ============================== Accessibility Layout ============================== */

/* Focus management for skip links */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--bg);
  color: var(--text);
  padding: var(--space-sm);
  border-radius: var(--border-radius);
  text-decoration: none;
  z-index: var(--z-modal);
  transition: top 0.3s;
}

.skip-to-content:focus {
  top: 6px;
}

/* Reduced motion layout adjustments */
@media (prefers-reduced-motion: reduce) {
  .nav-container,
  .footer-content,
  .projects-grid,
  .site-avatar {
    transition: none;
  }
  
  .site-avatar:hover {
    transform: none;
  }
}