/* === Layout System === */

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

/* --- Fixed Navigation --- */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  background: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-normal) var(--ease-in-out),
              background var(--duration-normal) var(--ease-in-out),
              box-shadow var(--duration-normal) var(--ease-in-out);
}

#main-nav.nav-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--color-text);
  letter-spacing: 0.02em;
  z-index: calc(var(--z-menu) + 1);
}

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

.nav-link {
  font-size: var(--fs-nav);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--letter-spacing-nav);
  text-transform: uppercase;
  transition: color var(--duration-fast) var(--ease-in-out);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

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

.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* --- Sections --- */
.section-hero,
.section-gallery,
.section-about {
  padding: var(--space-section) 0;
}

.section-hero {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
}

/* --- Hero Layout --- */
.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero-image-wrapper {
  margin-bottom: var(--space-xl);
}

.hero-profile {
  width: clamp(140px, 20vw, 200px);
  height: clamp(140px, 20vw, 200px);
  border-radius: var(--radius-round);
  overflow: hidden;
  padding: 3px;
  background: linear-gradient(135deg, var(--color-accent), transparent 60%);
}

.hero-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-round);
}

.hero-name {
  font-family: var(--font-heading);
  font-size: var(--fs-hero);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-heading);
  margin-bottom: var(--space-sm);
}

.hero-tagline {
  font-size: var(--fs-h3);
  color: var(--color-accent);
  font-weight: var(--fw-medium);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
}

.hero-bio {
  max-width: 560px;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-xl);
}

.hero-scroll-indicator {
  margin-top: var(--space-2xl);
  animation: floatDown 2s ease-in-out infinite;
}

.scroll-arrow {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
}

@keyframes floatDown {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* --- Gallery Section --- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header--left {
  text-align: left;
}

.section-label {
  display: inline-block;
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caption);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-heading);
  margin-bottom: var(--space-md);
}

.section-description {
  max-width: 560px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: var(--lh-relaxed);
}

/* --- Gallery Grid (CSS Columns Masonry) --- */
.gallery-grid {
  columns: 4 260px;
  column-gap: var(--space-lg);
}

/* --- Filter Bar --- */
.filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

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

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.about-paragraph {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-md);
}

.about-stats {
  display: flex;
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  font-weight: var(--fw-bold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caption);
}

/* --- Footer --- */
#footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

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

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.footer-tagline {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

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

.footer-links a {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
}

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

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

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

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: var(--z-to-top);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-round);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--duration-normal) var(--ease-in-out),
              transform var(--duration-normal) var(--ease-in-out),
              background var(--duration-fast);
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent);
  color: #000;
  border-color: var(--color-accent);
}

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-in-out),
              visibility var(--duration-normal) var(--ease-in-out);
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.mobile-link {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  color: var(--color-text);
  transition: color var(--duration-fast);
}

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

.mobile-menu-footer {
  position: absolute;
  bottom: var(--space-xl);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

/* --- Hamburger Button --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: calc(var(--z-menu) + 1);
  padding: 4px;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--duration-normal) var(--ease-in-out),
              opacity var(--duration-fast);
  transform-origin: center;
}

.hamburger.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Prevent flash of un-styled content while settings load */
[data-setting] {
  opacity: 0;
  transition: opacity 0.2s;
}
html.settings-ready [data-setting] {
  opacity: 1;
}

/* --- Hero Background Pattern --- */
.hero-bg-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.hero-bg-pattern::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-muted) 0%, transparent 70%);
  border-radius: var(--radius-round);
}