/* ===================================================================
   General View On This — Page Layout (layout.css)
   Containers, navigation, footer, grids, and utilities
   Premium layout system inspired by Nextdoor, Airbnb, Linear
   =================================================================== */

/* ---------------------------------------------------------------
   CONTAINERS
   --------------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  width: 100%;
}

.container-lg {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  width: 100%;
}

.container-sm {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  width: 100%;
}

.container-xs {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  width: 100%;
}

/* ---------------------------------------------------------------
   NAVIGATION — Premium sticky nav with glass effect
   --------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid transparent;
  z-index: 100;
  padding: 0 1.5rem;
  transition: border-color var(--transition-base),
              background-color var(--transition-base),
              box-shadow var(--transition-base);
}

/* Scrolled state — add via JS: document.querySelector('.nav').classList.add('nav--scrolled') */
.nav.nav--scrolled {
  border-bottom-color: var(--color-border);
  background-color: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-xs);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* Brand */
.nav-brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  flex-shrink: 0;
  transition: color var(--transition-fast),
              transform var(--transition-fast);
  position: relative;
}

.nav-brand:hover {
  color: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Nav Links */
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
  padding: 6px 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
  transition: width var(--transition-base),
              left var(--transition-base);
}

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

.nav-link:hover::after {
  width: 100%;
  left: 0;
}

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

.nav-link.active::after {
  width: 100%;
  left: 0;
  background-color: var(--color-accent);
}

/* Nav User Section */
.nav-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-surface-2);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.nav-user-avatar:hover {
  border-color: var(--color-accent-light);
  box-shadow: 0 0 0 3px rgba(232, 98, 42, 0.1);
}

.nav-user-name {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

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

.nav-credits {
  margin-left: 4px;
}

/* Credit Chip / Badge */
.nav-credit-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, rgba(245, 158, 11, 0.08) 100%);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
}

.nav-credit-chip:hover {
  box-shadow: var(--shadow-colored);
  transform: translateY(-1px);
}

.nav-credit-chip svg,
.nav-credit-chip i {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* --- Mobile Hamburger Toggle --- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  position: relative;
  z-index: 110;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.nav-toggle:hover {
  background-color: var(--color-surface-2);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: transform 350ms cubic-bezier(0.22, 1, 0.36, 1),
              opacity 250ms ease,
              width 250ms ease;
  position: absolute;
  left: 8px;
}

.nav-toggle span:nth-child(1) {
  top: 10px;
  width: 20px;
}

.nav-toggle span:nth-child(2) {
  top: 17px;
  width: 16px;
}

.nav-toggle span:nth-child(3) {
  top: 24px;
  width: 20px;
}

/* Hamburger to X transition */
.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg);
  top: 17px;
  width: 20px;
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
  width: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg);
  top: 17px;
  width: 20px;
}

/* --- Mobile Menu Overlay --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    gap: 0.25rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 350ms cubic-bezier(0.22, 1, 0.36, 1),
                visibility 350ms;
    z-index: 99;
    overflow-y: auto;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    font-size: 1.375rem;
    padding: 14px 24px;
    width: auto;
    text-align: center;
    border-bottom: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast),
                background-color var(--transition-fast);
  }

  .nav-link:hover {
    background-color: var(--color-surface-2);
  }

  .nav-link::after {
    display: none;
  }

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

  .nav-link.active::after {
    display: none;
  }

  .nav-user {
    padding-top: 1.5rem;
    margin-top: 1rem;
    width: auto;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid var(--color-border);
  }
}

/* ---------------------------------------------------------------
   FOOTER — Dark, multi-column layout
   --------------------------------------------------------------- */
.footer {
  margin-top: auto;
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.65);
  padding: 3.5rem 0 0;
  font-size: 0.9375rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: #FFFFFF;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
}

.footer-brand-desc {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.9375rem;
  transition: color var(--transition-fast),
              padding-left var(--transition-fast);
}

.footer-link:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

/* Footer Bottom Bar */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-social {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.6);
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.footer-social svg,
.footer-social i {
  width: 16px;
  height: 16px;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .footer {
    padding-top: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* ---------------------------------------------------------------
   GRID
   --------------------------------------------------------------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Auto-fit responsive grid */
.grid-auto-fit {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-auto-fit-sm {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-auto-fit-lg {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ---------------------------------------------------------------
   FLEX UTILITIES
   --------------------------------------------------------------- */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.flex-1 {
  flex: 1;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.gap-xs {
  gap: 0.25rem;
}

.gap-sm {
  gap: 0.5rem;
}

.gap-md {
  gap: 1rem;
}

.gap-lg {
  gap: 1.5rem;
}

.gap-xl {
  gap: 2rem;
}

.gap-2xl {
  gap: 3rem;
}

/* ---------------------------------------------------------------
   SPACING UTILITIES
   --------------------------------------------------------------- */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mt-6 { margin-top: 4rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.mb-6 { margin-bottom: 4rem; }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.p-5 { padding: 3rem; }

.px-1 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-2 { padding-left: 1rem; padding-right: 1rem; }
.px-3 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

/* ---------------------------------------------------------------
   TEXT UTILITIES
   --------------------------------------------------------------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent); }
.text-green { color: var(--color-green); }
.text-red { color: var(--color-red); }
.text-blue { color: var(--color-blue); }
.text-white { color: #FFFFFF; }

.text-xs { font-size: 0.75rem; letter-spacing: 0.01em; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 2rem; }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }
.font-mono { font-family: var(--font-mono); }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.uppercase {
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------------------------------------------------------------
   PAGE HEADER — with gradient underline decoration
   --------------------------------------------------------------- */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  position: relative;
}

.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-warm);
  border-radius: 2px;
}

.page-header--center {
  text-align: center;
}

.page-header--center::after {
  left: 50%;
  transform: translateX(-50%);
}

.page-title {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-subtitle {
  color: var(--color-text-secondary);
  margin-top: 0.375rem;
  font-size: 1.0625rem;
  line-height: 1.55;
}

/* Section Divider */
.section-divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-border) 20%,
    var(--color-border) 80%,
    transparent
  );
  margin: 2.5rem 0;
}

/* Page Hero — inner page hero banners */
.page-hero {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--color-surface-2) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232, 98, 42, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* ---------------------------------------------------------------
   MAIN CONTENT
   --------------------------------------------------------------- */
.main-content {
  flex: 1;
  padding: 2.5rem 0;
}

/* ---------------------------------------------------------------
   DISPLAY UTILITIES
   --------------------------------------------------------------- */
.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.inline-flex {
  display: inline-flex;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.overflow-hidden {
  overflow: hidden;
}

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: 9999px; }

/* ---------------------------------------------------------------
   GLASSMORPHISM
   --------------------------------------------------------------- */
.glass {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow-sm);
}

.glass-dark {
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

/* ---------------------------------------------------------------
   GRADIENT TEXT
   --------------------------------------------------------------- */
.gradient-text {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-cool {
  background: var(--gradient-cool);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-fresh {
  background: var(--gradient-fresh);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------------------------------------------------------------
   SCROLL ANIMATIONS
   --------------------------------------------------------------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll-delay-1 {
  transition-delay: 0.1s;
}

.animate-on-scroll-delay-2 {
  transition-delay: 0.2s;
}

.animate-on-scroll-delay-3 {
  transition-delay: 0.3s;
}

/* ---------------------------------------------------------------
   HOVER EFFECTS
   --------------------------------------------------------------- */
.hover-lift {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hover-glow {
  transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
  box-shadow: 0 0 24px rgba(232, 98, 42, 0.18),
              0 4px 16px rgba(232, 98, 42, 0.1);
}

.hover-scale {
  transition: transform var(--transition-fast);
}

.hover-scale:hover {
  transform: scale(1.02);
}

.hover-scale:active {
  transform: scale(0.98);
}

/* ---------------------------------------------------------------
   RESPONSIVE BREAKPOINTS
   --------------------------------------------------------------- */

/* Small mobile - 375px */
@media (max-width: 375px) {
  .container,
  .container-sm,
  .container-xs {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .page-title {
    font-size: 1.5rem;
  }
}

/* Tablet - 768px */
@media (max-width: 768px) {
  .hide-mobile {
    display: none !important;
  }

  .main-content {
    padding: 1.5rem 0;
  }

  .page-hero {
    padding: 2rem 0;
  }
}

/* Desktop - 1024px */
@media (min-width: 1024px) {
  .hide-desktop {
    display: none !important;
  }
}

/* Large - 1440px */
@media (min-width: 1440px) {
  .container {
    max-width: 1320px;
  }

  .container-lg {
    max-width: 1520px;
  }
}