/* Core CSS Variables and Base Styles */
:root {
  /* Bootstrap theme tokens from the initial HTML prevent product-color flashes
     before app.js applies the full design variant. */
  --primary-color: var(--bootstrap-primary-color, #6f5bff);
  --secondary-color: var(--bootstrap-secondary-color, #23d5ff);
  --accent-color: var(--bootstrap-accent-color, #ff8a3d);
  --background-color: var(--bootstrap-background-color, #04050b);
  --surface-color: var(--bootstrap-surface-color, #0f1626);
  --surface-elevated: var(
    --bootstrap-surface-elevated,
    color-mix(in srgb, var(--surface-color) 86%, var(--background-color) 14%)
  );
  --surface-overlay: var(
    --bootstrap-surface-overlay,
    color-mix(in srgb, var(--background-color) 78%, transparent)
  );
  --surface-glass: var(
    --bootstrap-surface-glass,
    color-mix(in srgb, var(--surface-color) 72%, transparent)
  );
  --surface-soft: var(
    --bootstrap-surface-soft,
    color-mix(in srgb, var(--text-color) 6%, transparent)
  );
  --text-color: var(--bootstrap-text-color, #f5f7ff);
  --text-primary: var(--text-color);
  --text-muted-color: var(--bootstrap-text-muted-color, rgba(229, 235, 255, 0.78));
  --text-muted: var(--text-muted-color);
  --text-soft: var(
    --bootstrap-text-soft,
    color-mix(in srgb, var(--text-color) 58%, transparent)
  );
  --text-secondary: var(--text-soft);
  --border-color: var(--bootstrap-border-color, rgba(127, 115, 255, 0.24));
  --border-strong: var(
    --bootstrap-border-strong,
    color-mix(in srgb, var(--border-color) 70%, var(--primary-color) 30%)
  );
  --card-background: var(--surface-elevated);
  --background-gradient: var(
    --bootstrap-background-gradient,
    linear-gradient(
      135deg,
      var(--background-color) 0%,
      color-mix(in srgb, var(--surface-color) 82%, var(--background-color) 18%) 52%,
      color-mix(in srgb, var(--background-color) 88%, var(--surface-color) 12%) 100%
    )
  );
  --hero-gradient: var(
    --bootstrap-hero-gradient,
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--background-color) 98%, black 2%) 0%,
      color-mix(in srgb, var(--surface-color) 94%, var(--background-color) 6%) 52%,
      color-mix(in srgb, var(--background-color) 98%, black 2%) 100%
    )
  );
  --primary-action-gradient: var(
    --bootstrap-primary-action-gradient,
    linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%)
  );
  --secondary-action-gradient: var(
    --bootstrap-secondary-action-gradient,
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--text-color) 8%, transparent) 0%,
      color-mix(in srgb, var(--text-color) 2%, transparent) 100%
    )
  );
  --card-border-gradient: var(
    --bootstrap-card-border-gradient,
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--primary-color) 28%, transparent),
      color-mix(in srgb, var(--secondary-color) 16%, transparent)
    )
  );
  --highlight-gradient: var(
    --bootstrap-highlight-gradient,
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--primary-color) 18%, transparent) 0%,
      color-mix(in srgb, var(--secondary-color) 8%, transparent) 100%
    )
  );
  --error-color: #ff6b7a;
  --error-color-rgb: 255, 107, 122;
  --success-color: #36d28f;
  --success-color-rgb: 54, 210, 143;
  --warning-color: #f6b73c;
  --warning-color-rgb: 246, 183, 60;
  --info-color: #64b7ff;
  --info-color-rgb: 100, 183, 255;
  --primary-color-rgb: var(--bootstrap-primary-color-rgb, 111, 91, 255);
  --hero-glow: var(
    --bootstrap-hero-glow,
    color-mix(in srgb, var(--primary-color) 24%, transparent)
  );
  --hero-glow-secondary: var(
    --bootstrap-hero-glow-secondary,
    color-mix(in srgb, var(--secondary-color) 18%, transparent)
  );

  /* Typography */
  --font-family: var(--bootstrap-font-family, "Manrope", "Segoe UI", sans-serif);
  --font-family-body: var(--font-family);
  --font-family-display: var(
    --bootstrap-font-family-display,
    "Space Grotesk",
    "Segoe UI",
    sans-serif
  );
  --font-family-mono: var(
    --bootstrap-font-family-mono,
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    monospace
  );
  --letter-spacing-display: var(--bootstrap-letter-spacing-display, -0.04em);
  --letter-spacing-eyebrow: var(--bootstrap-letter-spacing-eyebrow, 0.18em);
  --font-size-2xs: 0.7rem;
  --font-size-xs: 0.8125rem;
  --font-size-base: 1rem;
  --font-size-md: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.5rem;

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

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.95rem;
  --radius-lg: 1.35rem;
  --radius-xl: 1.9rem;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 10px 20px rgba(2, 6, 23, 0.22);
  --shadow-md: 0 18px 38px rgba(2, 6, 23, 0.24);
  --shadow-lg: 0 24px 60px rgba(2, 6, 23, 0.34);
  --shadow-xl: 0 40px 90px rgba(2, 6, 23, 0.42);
  --shadow-glow: 0 0 0 1px rgba(127, 115, 255, 0.18), 0 24px 60px rgba(34, 211, 238, 0.12);

  /* Transitions */
  --transition-fast: 160ms ease;
  --transition-normal: 260ms cubic-bezier(0.22, 1, 0.36, 1);
  --transition-slow: 420ms cubic-bezier(0.22, 1, 0.36, 1);

  /* Layout and effects */
  --content-width: 1180px;
  --reading-width: 760px;
  --hero-width: 720px;
  --section-gap: clamp(4rem, 8vw, 7rem);
  --nav-blur: 16px;
  --card-blur: 18px;
  --hero-orb-size: 34rem;

  /* Component tokens */
  --button-primary-text: var(--bootstrap-button-primary-text, #04111f);
  --button-secondary-text: var(--bootstrap-button-secondary-text, var(--text-color));
  --button-secondary-border: var(
    --bootstrap-button-secondary-border,
    color-mix(in srgb, var(--text-color) 14%, transparent)
  );
  --badge-background: var(
    --bootstrap-badge-background,
    color-mix(in srgb, var(--secondary-color) 16%, transparent)
  );
  --badge-text: var(
    --bootstrap-badge-text,
    color-mix(in srgb, var(--text-color) 88%, var(--secondary-color) 12%)
  );
  --eyebrow-color: var(
    --bootstrap-eyebrow-color,
    color-mix(in srgb, var(--text-color) 78%, transparent)
  );
  --problem-surface: rgba(255, 107, 122, 0.14);
  --problem-border: rgba(255, 107, 122, 0.42);
  --problem-text: #ffd3da;
  --solution-surface: rgba(54, 210, 143, 0.16);
  --solution-border: rgba(54, 210, 143, 0.42);
  --success-surface: rgba(54, 210, 143, 0.16);
  --success-border: rgba(54, 210, 143, 0.32);
  --success-text: #c8f6df;
  --warning-surface: rgba(246, 183, 60, 0.16);
  --warning-border: rgba(246, 183, 60, 0.32);
  --warning-text: #ffe3a2;
  --info-surface: rgba(100, 183, 255, 0.16);
  --info-border: rgba(100, 183, 255, 0.32);
  --info-text: #d9ebff;
  --neutral-surface: rgba(255, 255, 255, 0.05);
  --field-background: color-mix(
    in srgb,
    var(--background-color) 72%,
    var(--surface-color) 28%
  );
  --field-background-strong: color-mix(
    in srgb,
    var(--background-color) 78%,
    var(--surface-elevated) 22%
  );
  --background-secondary: var(--surface-elevated);
  --background-subtle: color-mix(
    in srgb,
    var(--surface-soft) 90%,
    transparent
  );
  --overlay-surface: color-mix(
    in srgb,
    var(--surface-overlay) 92%,
    transparent
  );
  --overlay-text: var(--text-color);
  --chrome-background: color-mix(in srgb, var(--surface-overlay) 90%, transparent);
  --chrome-surface: color-mix(in srgb, var(--surface-elevated) 92%, transparent);
  --chrome-border: var(--border-color);
  --chrome-text: var(--text-color);
  --chrome-muted: var(--text-muted);
  --footer-background: color-mix(in srgb, var(--background-color) 86%, var(--surface-color) 14%);
  --footer-bottom-background: var(--background-color);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  min-width: 320px;
  overflow-x: clip;
  /* reserve space for vertical scrollbar to prevent layout shift */
  overflow-y: scroll;
  scrollbar-gutter: stable;
}

/* On very narrow screens, disable scrollbar gutter to maximize usable width */
@media (max-width: 360px) {
  html {
    scrollbar-gutter: auto;
  }
}

body {
  font-family: var(--font-family);
  background: var(--background-gradient);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  min-width: 320px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Prevent text from being too small on mobile */
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  /* Prevent horizontal scroll on larger screens */
  overflow-x: clip;
  position: relative;
  isolation: isolate;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: var(--hero-orb-size);
  height: var(--hero-orb-size);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  filter: blur(12px);
}

body::before {
  top: -12rem;
  right: -10rem;
  background: radial-gradient(circle, var(--hero-glow) 0%, transparent 68%);
}

body::after {
  left: -10rem;
  bottom: -14rem;
  background: radial-gradient(
    circle,
    var(--hero-glow-secondary) 0%,
    transparent 70%
  );
}

/* During page transitions, disable pointer events on header to avoid race navigations */
body.is-loading .main-navigation {
  pointer-events: none;
  opacity: 0.8;
}

/* Layout Components */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.studio-page {
  width: 100%;
}

.studio-page__hero {
  padding: clamp(2.5rem, 7vw, 5.5rem) var(--spacing-lg) 0;
}

.studio-page__hero-grid {
  width: min(100%, var(--content-width, 1180px));
  margin: 0 auto;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}

.studio-page__hero-grid--single {
  grid-template-columns: minmax(0, min(100%, var(--hero-width, 720px)));
}

.studio-page__intro {
  max-width: min(58rem, var(--hero-width, 720px));
}

.studio-page__eyebrow,
.studio-page__section-kicker,
.studio-page__panel-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-eyebrow, 0.18em);
  text-transform: uppercase;
  color: var(--eyebrow-color, rgba(191, 247, 255, 0.78));
}

.studio-page__eyebrow,
.studio-page__section-kicker {
  margin-bottom: var(--spacing-lg);
}

.studio-page__eyebrow::before,
.studio-page__section-kicker::before {
  content: "";
  width: 3.5rem;
  height: 1px;
  background: linear-gradient(
    90deg,
    var(--secondary-color),
    rgba(var(--primary-color-rgb, 111, 91, 255), 0)
  );
}

.studio-page__title {
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  font-family: var(--font-family-display, var(--font-family));
  font-weight: 800;
  letter-spacing: var(--letter-spacing-display, -0.04em);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(
    135deg,
    var(--text-color) 0%,
    var(--secondary-color) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.02;
}

.studio-page__subtitle,
.studio-page__section-heading p,
.studio-page__panel-copy {
  font-size: clamp(1rem, 2.2vw, var(--font-size-lg));
  color: var(--text-soft, var(--text-muted));
  line-height: 1.7;
}

.studio-page__highlights {
  list-style: none;
  display: grid;
  gap: 0.65rem;
  padding: 0;
  margin: var(--spacing-xl) 0 0;
}

.studio-page__highlights li {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.studio-page__highlights li::before {
  content: "";
  width: 1.25rem;
  height: 1px;
  border-radius: 0;
  background: currentColor;
  opacity: 0.65;
  box-shadow: none;
}

.studio-page__panel,
.studio-page__section-shell {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(var(--card-background, var(--surface-elevated)), var(--card-background, var(--surface-elevated))) padding-box,
    var(--card-border-gradient, linear-gradient(135deg, rgba(111, 91, 255, 0.28), rgba(35, 213, 255, 0.16))) border-box;
  border: 1px solid transparent;
  border-radius: var(--radius-xl, 1.9rem);
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(var(--card-blur, 18px));
  -webkit-backdrop-filter: blur(var(--card-blur, 18px));
}

.studio-page__panel {
  padding: clamp(1.5rem, 4vw, 2rem);
}

.studio-page__panel::before,
.studio-page__section-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(35, 213, 255, 0.1), transparent 45%);
  pointer-events: none;
}

.studio-page__panel-title {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-family: var(--font-family-display, var(--font-family));
  font-weight: 700;
  letter-spacing: var(--letter-spacing-display, -0.04em);
  color: var(--text-primary);
  line-height: 1.1;
  margin: 0.4rem 0 0.75rem;
}

.studio-page__panel-list {
  list-style: none;
  padding: 0;
  margin: 1.4rem 0 0;
}

.studio-page__panel-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 0.95rem 0;
  border-top: 1px solid color-mix(in srgb, var(--border-color) 72%, transparent);
}

.studio-page__panel-item:first-child {
  border-top: none;
  padding-top: 0;
}

.studio-page__panel-index {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  color: var(--secondary-color);
  opacity: 0.85;
}

.studio-page__panel-body {
  display: grid;
  gap: 0.35rem;
}

.studio-page__panel-body strong {
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

.studio-page__panel-body span {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.studio-page__section {
  padding: clamp(1.25rem, 4vw, 2rem) var(--spacing-lg) 0;
}

.studio-page__section-shell {
  width: min(100%, var(--content-width, 1180px));
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.studio-page__section-heading {
  max-width: min(48rem, var(--reading-width, 760px));
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

.studio-page__section-heading h2 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-family: var(--font-family-display, var(--font-family));
  font-weight: 700;
  letter-spacing: var(--letter-spacing-display, -0.04em);
  color: var(--text-primary);
  line-height: 1.08;
}

.studio-page__section-heading h2 + p,
.studio-page__section-heading .studio-page__section-copy {
  margin-top: var(--spacing-md);
}

@media (min-width: 900px) {
  .studio-page__hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
  }

  .studio-page__hero-grid--single {
    grid-template-columns: minmax(0, min(100%, var(--hero-width, 720px)));
  }
}

@media (max-width: 767px) {
  .studio-page__hero,
  .studio-page__section {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  .studio-page__eyebrow::before,
  .studio-page__section-kicker::before {
    width: 2.2rem;
  }

  .studio-page__highlights {
    flex-direction: column;
  }
}

/* Navigation Styles - Mobile First */
.main-navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--chrome-background);
  border-bottom: 1px solid var(--chrome-border);
  backdrop-filter: blur(var(--nav-blur));
  -webkit-backdrop-filter: blur(var(--nav-blur));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
  z-index: 1000;
}

.nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - clamp(1rem, 4vw, 3rem), var(--content-width, 1180px));
  margin: 0 auto;
  padding: var(--spacing-sm) 0;
  height: var(--nav-height, 60px);
  position: relative;
}

/* Navigation controls container */
.nav-controls {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 2vw, var(--spacing-md));
  z-index: 1;
}

/* Login button in header */
.nav-login {
  padding: var(--spacing-sm) var(--spacing-md) !important;
  font-size: var(--font-size-sm) !important;
  min-height: auto !important;
  width: auto !important;
  background: var(--primary-action-gradient) !important;
  color: var(--button-primary-text) !important;
  border-radius: var(--radius-pill) !important;
  border: none !important;
  box-shadow: var(--shadow-glow);
  font-weight: 700 !important;
}

.nav-login:hover {
  color: var(--button-primary-text) !important;
  transform: translateY(-1px);
}

.nav-login .nav-icon {
  width: auto !important;
  margin-right: var(--spacing-xs);
  font-size: var(--font-size-sm) !important;
}

.nav-brand-title {
  font-size: var(--font-size-lg);
  font-family: var(--font-family-display);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-display);
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-brand img,
.nav-brand-logo {
  height: var(--nav-logo-height, 26px);
  width: auto;
  max-width: var(--nav-logo-max-width, min(220px, 42vw));
  aspect-ratio: var(--nav-logo-aspect-ratio, 6012 / 788);
  display: block;
  object-fit: contain;
}

@media (max-width: 640px) {
  .nav-brand img,
  .nav-brand-logo {
    height: var(--nav-logo-height-mobile, 22px);
    max-width: var(--nav-logo-max-width-mobile, 38vw);
  }
}

.nav-brand a {
  text-decoration: none;
  color: inherit;
}

/* Mobile Navigation Toggle - Better hamburger design */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 21px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  position: relative;
}

.nav-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--text-color);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* Mobile Navigation Menu - Solid background */
.nav-menu {
  position: fixed;
  top: var(--nav-height, 60px);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--chrome-surface);
  backdrop-filter: blur(calc(var(--nav-blur) * 1.15));
  -webkit-backdrop-filter: blur(calc(var(--nav-blur) * 1.15));
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  z-index: 1002;
  border-top: 1px solid var(--border-color);
  overflow-y: auto;
  isolation: isolate;
}

.nav-menu.active {
  transform: translateX(0);
}

@media (max-width: 1279px) {
  .nav-menu {
    background: var(--chrome-surface);
    bottom: auto;
    height: calc(100dvh - var(--nav-height, 60px));
    max-height: calc(100dvh - var(--nav-height, 60px));
    box-shadow: 0 28px 80px rgba(2, 6, 23, 0.58);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-menu .nav-item {
    background: color-mix(in srgb, var(--surface-color) 94%, #020617 6%);
    border-color: color-mix(in srgb, var(--border-strong) 78%, white 22%);
    box-shadow: 0 16px 36px rgba(2, 6, 23, 0.24);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-menu .nav-item:hover,
  .nav-menu .nav-item.active {
    background: color-mix(in srgb, var(--surface-elevated) 88%, var(--secondary-color) 12%);
    border-color: var(--border-strong);
  }
}

@supports (background: color-mix(in srgb, #000 50%, #fff 50%)) {
  .nav-menu {
    background: color-mix(in srgb, var(--surface-elevated) 98%, #020617 2%);
  }

  @media (max-width: 1279px) {
    .nav-menu {
      background: color-mix(in srgb, var(--surface-elevated) 98%, #020617 2%);
    }

    .nav-menu .nav-item {
      background: color-mix(in srgb, var(--surface-color) 94%, #020617 6%);
    }
  }
}

/* Mobile menu backdrop */
.nav-menu-backdrop {
  position: fixed;
  top: var(--nav-height, 60px);
  left: 0;
  right: 0;
  bottom: auto;
  height: calc(100dvh - var(--nav-height, 60px));
  max-height: calc(100dvh - var(--nav-height, 60px));
  background: color-mix(in srgb, var(--background-color) 76%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal);
  z-index: 998;
}

.nav-menu-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-items {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Return to App section for secondary pages */
.nav-return-to-app {
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-md);
}

.nav-app-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--primary-color);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
  font-weight: 600;
  min-height: 48px;
  background: var(--highlight-gradient);
  border: 1px solid var(--border-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.nav-app-link:hover {
  background: var(--primary-action-gradient);
  color: var(--button-primary-text);
  border-color: var(--primary-color);
  transform: translateX(-2px);
}

.nav-app-link .nav-icon {
  width: 20px;
  text-align: center;
  font-size: var(--font-size-base);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--chrome-muted);
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: var(--transition-fast);
  font-weight: 500;
  min-height: 44px; /* Touch-friendly */
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: var(--font-size-base);
  width: 100%;
  justify-content: flex-start;
  border: 1px solid transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.nav-item:hover,
.nav-item.active {
  color: var(--chrome-text);
  background: var(--neutral-surface);
  border-color: var(--chrome-border);
  transform: none;
}

.nav-item-cta {
  color: var(--button-primary-text) !important;
  background: var(--primary-action-gradient) !important;
  border-color: transparent !important;
  font-weight: 700;
  justify-content: center;
}

.nav-item-cta:hover,
.nav-item-cta.active {
  color: var(--button-primary-text) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-item .nav-icon {
  width: 20px;
  text-align: center;
  font-size: var(--font-size-lg);
}
.nav-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

/* User Profile Dropdown */
.nav-user-profile {
  position: relative;
}

.nav-user-toggle {
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  border-radius: 50%;
  transition: var(--transition-fast);
  width: 40px;
  height: 40px;
  justify-content: center;
}

.nav-user-toggle:hover {
  background: var(--neutral-surface);
  transform: scale(1.05);
}

.nav-user-toggle.has-setup-pending {
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--warning-color) 54%, transparent);
}

.nav-setup-avatar-badge {
  position: absolute;
  right: 2px;
  top: 2px;
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--background-color);
  border-radius: 999px;
  background: var(--warning-color);
  box-shadow: 0 0 0 3px rgba(246, 183, 60, 0.16);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.nav-user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  left: auto;
  min-width: 200px;
  max-width: 280px;
  background: color-mix(in srgb, var(--surface-elevated) 96%, #05030a 4%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.38);
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 1000;
  margin-bottom: var(--spacing-sm);
}

.nav-user-dropdown-backdrop {
  position: fixed;
  top: var(--nav-height, 60px);
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(4, 6, 15, 0.42);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal);
  z-index: 998;
}

.nav-user-dropdown-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Prevent dropdown overflow on small screens */
@media (max-width: 480px) {
  .nav-user-dropdown {
    right: var(--spacing-xs);
    min-width: 240px;
    max-width: calc(100vw - var(--spacing-md));
  }
}

.nav-user-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  z-index: 1002;
}

.user-dropdown-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.user-details {
  flex: 1;
  min-width: 0;
}

.user-name-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--spacing-sm);
}

.user-dropdown-header .user-name {
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--text-color);
  word-break: break-word;
}

.nav-setup-status-action {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--warning-color) 46%, var(--border-color));
  border-radius: 999px;
  background: color-mix(in srgb, var(--warning-surface) 72%, transparent);
  color: var(--warning-color);
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.nav-setup-status-action:hover,
.nav-setup-status-action:focus-visible {
  transform: translateY(-1px);
  border-color: var(--warning-color);
  background: color-mix(in srgb, var(--warning-surface) 88%, transparent);
}

.nav-setup-status-icon {
  width: 1rem;
  height: 1rem;
}

.user-dropdown-items {
  padding: var(--spacing-sm);
}

.user-dropdown-items .nav-item {
  padding: var(--spacing-sm) var(--spacing-md);
  margin: 0;
  border-radius: var(--radius-md);
  min-height: auto;
  background: var(--surface-color);
  border-color: var(--border-color);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.dropdown-divider {
  border: none;
  height: 1px;
  background: var(--border-color);
  margin: var(--spacing-sm) 0;
}

.nav-logout,
.nav-login {
  justify-content: center;
  font-weight: 600;
}

.nav-login {
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: var(--button-primary-text);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  min-height: 40px;
  white-space: nowrap;
}

.nav-login:hover {
  color: var(--button-primary-text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Desktop Navigation */
@media (min-width: 1280px) {
  .main-navigation {
    position: static;
    background: var(--chrome-background);
  }

  .nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    height: auto;
    min-height: 64px;
  }

  .nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }

  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    transform: none;
    flex-direction: row;
    align-items: center;
    padding: 0;
    background: transparent;
    top: auto;
    bottom: auto;
    left: auto;
    right: auto;
    height: auto;
    border-top: none;
    flex: 1;
    justify-content: center;
  }

  .nav-items {
    flex-direction: row;
    gap: var(--spacing-xs);
    padding: 0;
    flex: none;
  }

  .nav-item {
    min-height: auto;
    padding: 0.45rem 0.75rem;
    white-space: nowrap;
    font-size: var(--font-size-sm);
  }

  .nav-footer {
    display: none; /* Hide on desktop as login button is in nav-controls */
  }

  .nav-user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    left: auto;
    bottom: auto;
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
    min-width: 200px;
  }

  .nav-user-dropdown-backdrop {
    top: 64px;
  }

  .nav-brand {
    display: block;
  }

  .nav-brand img,
  .nav-brand-logo {
    height: var(--nav-logo-height-desktop, 30px);
    max-width: var(--nav-logo-max-width-desktop, 240px);
  }

  .nav-brand-title {
    font-size: var(--font-size-xl);
  }

  /* Desktop layout: brand on left, nav items center, user controls on right */
  .nav-header {
    position: relative;
  }

  .nav-controls {
    margin-left: auto;
    z-index: 1;
    order: 2; /* Ensure nav-controls are always on the right */
  }

  /* Desktop login button styling */
  .nav-controls .nav-login {
    min-height: 36px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
    order: 1; /* Login button comes first (left) */
  }

  .nav-controls .nav-user-profile {
    order: 2; /* User profile comes after login (right) */
  }

  .nav-controls .nav-public-cta {
    display: none;
  }

  .main-navigation.nav-marketing-route:not(.nav-landing-route)
    .nav-controls
    .nav-public-cta,
  .main-navigation.nav-menu-collapsed .nav-controls .nav-public-cta {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  /* Hide login button inside nav-items on desktop (no burger) */
  .nav-items .nav-login {
    display: none;
  }

  .main-navigation.nav-menu-collapsed .nav-toggle {
    display: flex;
  }

  .main-navigation.nav-menu-collapsed .nav-menu {
    position: fixed;
    top: var(--nav-height, 60px);
    left: 0;
    right: 0;
    bottom: auto;
    height: calc(100dvh - var(--nav-height, 60px));
    max-height: calc(100dvh - var(--nav-height, 60px));
    transform: translateX(-100%);
    flex-direction: column;
    align-items: stretch;
    padding: 0;
    background: color-mix(in srgb, var(--surface-elevated) 98%, #020617 2%);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 28px 80px rgba(2, 6, 23, 0.58);
    overflow-y: auto;
    z-index: 1002;
    flex: none;
    justify-content: flex-start;
  }

  .main-navigation.nav-menu-collapsed .nav-menu.active {
    transform: translateX(0);
  }

  .main-navigation.nav-menu-collapsed .nav-items {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    flex: 1;
    width: 100%;
  }

  .main-navigation.nav-menu-collapsed .nav-item {
    min-height: 44px;
    padding: var(--spacing-md) var(--spacing-lg);
    white-space: normal;
    font-size: var(--font-size-base);
    width: 100%;
  }

  .main-navigation.nav-menu-collapsed .nav-menu-locale {
    display: block;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
  }

  .main-navigation .nav-header {
    overflow-x: clip;
  }

  .main-navigation.nav-menu-collapsed .nav-menu {
    min-width: 0;
  }
}

/* Adjust main content for fixed nav on mobile */
/* Offset content only when the fixed header is actually visible */
body.has-nav .main-content {
  padding-top: var(--nav-height, 60px);
}

@media (min-width: 1280px) {
  /* On small screens we do not offset for the fixed header */
  body.has-nav .main-content {
    padding-top: 0;
  }

  .main-navigation {
    position: static;
    border-bottom: 1px solid var(--chrome-border);
  }
}

@media (max-width: 420px) {
  .nav-public-cta {
    padding-inline: 0.8rem !important;
  }

  .nav-public-cta .nav-icon {
    display: none;
  }
}

/* Button Styles - Enhanced for accessibility */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-family-body);
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  min-height: 44px; /* Touch-friendly */
  white-space: nowrap;
}

.btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary-action-gradient);
  color: var(--button-primary-text);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: var(--secondary-action-gradient);
  color: var(--button-secondary-text);
  border: 1px solid var(--button-secondary-border);
  backdrop-filter: blur(calc(var(--card-blur) * 0.5));
  -webkit-backdrop-filter: blur(calc(var(--card-blur) * 0.5));
}

.btn-secondary:hover:not(:disabled) {
  background: var(--highlight-gradient);
  border-color: var(--border-strong);
}

.btn-logout {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  background: transparent;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  min-height: 44px;
  white-space: nowrap;
}

.btn-logout:hover:not(:disabled) {
  background: color-mix(in srgb, var(--error-color) 14%, transparent);
  border-color: var(--error-color);
  color: var(--error-color);
}

.btn-logout:focus {
  outline: 2px solid var(--error-color);
  outline-offset: 2px;
}

.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  background: var(--primary-action-gradient);
  color: var(--button-primary-text);
  min-height: 44px;
  white-space: nowrap;
  box-shadow: var(--shadow-glow);
}

.btn-login:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-login:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Card Component */
.card {
  background:
    linear-gradient(var(--card-background), var(--card-background)) padding-box,
    var(--card-border-gradient) border-box;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-glow);
  border: 1px solid transparent;
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
}

.icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

/* Form Styles */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-color);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background-color);
  color: var(--text-color);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.16);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

.text-right {
  text-align: right;
}

.mt-xs {
  margin-top: var(--spacing-xs);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-xs {
  margin-bottom: var(--spacing-xs);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.p-xs {
  padding: var(--spacing-xs);
}

.p-sm {
  padding: var(--spacing-sm);
}

.p-md {
  padding: var(--spacing-md);
}

.p-lg {
  padding: var(--spacing-lg);
}

.p-xl {
  padding: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
  .card {
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
  }

  .form-input {
    padding: var(--spacing-md);
    font-size: 16px; /* Prevents zoom on iOS */
  }

  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    min-height: 48px;
  }
}

/* Module-specific styles will be loaded dynamically */
.module-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Loading and Error States */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  font-size: var(--font-size-base);
  color: var(--text-muted);
  text-align: center;
  padding: var(--spacing-xl);
  contain: content;
}

.loading-shell {
  min-height: 100vh;
  justify-content: flex-start;
  align-items: stretch;
  width: 100%;
  padding: 0;
}

.loading-shell-home,
.loading-shell-generic {
  width: 100%;
}

.loading-shell-home {
  display: none;
  gap: clamp(2.5rem, 6vw, 4rem);
  min-height: 100vh;
  align-content: start;
  padding: clamp(0.85rem, 2.5vw, 1.25rem) var(--container-padding) clamp(3rem, 7vw, 5rem);
  text-align: left;
}

html[data-initial-route="home"] .loading-shell-home {
  display: grid;
}

html[data-initial-route="home"] .loading-shell-generic {
  display: none;
}

.loading-shell-generic {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  justify-content: center;
  min-height: 100vh;
  padding: var(--spacing-xl);
  text-align: center;
}

.loading-shell-nav {
  width: min(100%, var(--content-width));
  min-height: 4rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.loading-shell-brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.loading-shell-brand img {
  display: block;
  width: auto;
  height: clamp(1.7rem, 5vw, 2.15rem);
  max-width: min(11rem, 52vw);
}

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

.loading-shell-nav-pill {
  display: block;
  width: clamp(5.25rem, 10vw, 7.5rem);
  height: 0.95rem;
  border-radius: var(--radius-pill);
}

.loading-shell-nav-pill:last-child {
  width: clamp(7.25rem, 13vw, 10.5rem);
  height: 2.25rem;
  border: 1px solid var(--border-color);
}

.loading-shell-hero-grid {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  display: block;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: center;
}

.loading-shell-copy {
  display: grid;
  gap: clamp(1rem, 2.8vw, 1.35rem);
  max-width: 58rem;
}

.loading-shell-skeleton {
  position: relative;
  overflow: hidden;
  color: transparent;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--surface-soft) 76%, transparent),
    color-mix(in srgb, var(--text-color) 18%, var(--surface-soft)),
    color-mix(in srgb, var(--surface-soft) 76%, transparent)
  );
  background-size: 220% 100%;
  animation: loading-shell-shimmer 1.35s ease-in-out infinite;
}

.loading-shell-kicker-skeleton {
  width: clamp(10rem, 24vw, 17rem);
  height: clamp(0.8rem, 1.6vw, 0.95rem);
  border-radius: var(--radius-pill);
}

.loading-shell-title-skeleton,
.loading-shell-subtitle-skeleton {
  display: grid;
  gap: clamp(0.55rem, 1.6vw, 0.8rem);
}

.loading-shell-title-skeleton {
  width: min(100%, 58rem);
  gap: clamp(0.65rem, 2vw, 1rem);
}

.loading-shell-title-skeleton span {
  display: block;
  height: clamp(2.65rem, 7vw, 6.2rem);
  border-radius: var(--radius-sm, 8px);
}

.loading-shell-title-skeleton span:nth-child(1) {
  width: min(100%, 14ch);
}

.loading-shell-title-skeleton span:nth-child(2) {
  width: min(82%, 11.5ch);
}

.loading-shell-title-skeleton span:nth-child(3) {
  width: min(64%, 9ch);
}

.loading-shell-subtitle-skeleton {
  width: min(100%, 58ch);
}

.loading-shell-subtitle-skeleton span {
  display: block;
  height: clamp(0.95rem, 2vw, 1.2rem);
  border-radius: var(--radius-pill);
}

.loading-shell-subtitle-skeleton span:nth-child(1) {
  width: 100%;
}

.loading-shell-subtitle-skeleton span:nth-child(2) {
  width: 88%;
}

.loading-shell-subtitle-skeleton span:nth-child(3) {
  width: 58%;
}

.loading-shell-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: flex-start;
  margin-top: 0.35rem;
}

.loading-shell-action {
  display: block;
  width: clamp(9rem, 18vw, 12rem);
  height: 3rem;
  border-radius: var(--radius-pill);
}

.loading-shell-action:last-child {
  width: clamp(10rem, 20vw, 14rem);
  border: 1px solid var(--border-color);
  background: color-mix(in srgb, var(--surface-glass) 80%, transparent);
}

.loading-shell-marker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  width: min(100%, 48rem);
  margin-top: 0.35rem;
}

.loading-shell-marker-row span {
  width: clamp(6.5rem, 14vw, 10rem);
  height: 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm, 8px);
}

.loading-shell-panel {
  display: grid;
  gap: var(--spacing-md);
  min-height: clamp(20rem, 42vw, 28rem);
  padding: clamp(1rem, 3vw, 1.4rem);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--surface-elevated) 88%, transparent);
  box-shadow: var(--shadow-lg);
}

.loading-shell-panel-header,
.loading-shell-cues {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.loading-shell-panel-header span {
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  font-weight: 800;
  text-transform: uppercase;
}

.loading-shell-thread {
  display: grid;
  gap: var(--spacing-sm);
}

.loading-shell-message {
  display: grid;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--neutral-surface);
}

.loading-shell-message strong {
  color: var(--text-color);
  font-size: var(--font-size-sm);
}

.loading-shell-line,
.loading-shell-cues span {
  display: block;
  min-height: 0.85rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--surface-soft) 80%, transparent),
    color-mix(in srgb, var(--surface-soft) 40%, var(--text-muted) 18%),
    color-mix(in srgb, var(--surface-soft) 80%, transparent)
  );
  background-size: 220% 100%;
  animation: loading-shell-shimmer 1.35s ease-in-out infinite;
}

.loading-shell-line:nth-child(2) {
  width: 92%;
}

.loading-shell-line:nth-child(3) {
  width: 64%;
}

.loading-shell-cues {
  justify-content: flex-start;
}

.loading-shell-cues span {
  width: 6.5rem;
  min-height: 1.6rem;
}

.loading-shell-note {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.loading-shell-note:empty {
  display: none;
}

@keyframes loading-shell-shimmer {
  0% {
    background-position: 180% 0;
  }

  100% {
    background-position: -40% 0;
  }
}

@media (max-width: 820px) {
  .loading-shell-hero-grid {
    grid-template-columns: 1fr;
  }

  .loading-shell-panel {
    min-height: 18rem;
  }
}

@media (max-width: 560px) {
  .loading-shell-nav-actions .loading-shell-nav-pill:first-child {
    display: none;
  }

  .loading-shell-actions {
    flex-direction: column;
  }

  .loading-shell-action {
    width: 100%;
  }
}

.error-icon {
  width: 4rem;
  height: 4rem;
  margin-bottom: 1rem;
  color: var(--error-color);
}

.loading i {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.error {
  padding: var(--spacing-lg);
  margin: var(--spacing-lg);
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid var(--error-color);
  border-radius: var(--radius-md);
  color: var(--error-color);
  text-align: center;
}

/* Accessibility improvements */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus management */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Skip links for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 9999;
}

.skip-link:focus {
  top: 6px;
}

/* Lightweight CSS spinner to avoid icon font FOUC */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinner-rotate 0.6s linear infinite;
  /* Ensure perfect circle to prevent deformation */
  flex-shrink: 0;
  min-width: 1.5rem;
  min-height: 1.5rem;
  max-width: 1.5rem;
  max-height: 1.5rem;
}

.spinner-lg {
  width: 2rem;
  height: 2rem;
  border-width: 3px;
  min-width: 2rem;
  min-height: 2rem;
  max-width: 2rem;
  max-height: 2rem;
}

.spinner-sm {
  width: 1rem;
  height: 1rem;
  min-width: 1rem;
  min-height: 1rem;
  max-width: 1rem;
  max-height: 1rem;
}

/* Fix for button loading states to prevent spinner deformation */
.btn-loading .spinner {
  vertical-align: middle;
}

@keyframes spinner-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   COMPREHENSIVE SMALL SCREEN OPTIMIZATIONS
   Target: 320px - 480px width devices
   ======================================== */
@media (max-width: 480px) {
  /* Root font-size reduction for better fit */
  :root {
    --font-size-3xl: 1.625rem;
    --font-size-2xl: 1.375rem;
    --font-size-xl: 1.125rem;
  }

  /* Main content spacing */
  .main-content {
    padding-top: var(--nav-height, 60px); /* Account for fixed header */
  }

  /* Container improvements */
  .container {
    padding-left: var(--spacing-sm, 0.5rem);
    padding-right: var(--spacing-sm, 0.5rem);
  }

  /* Typography improvements */
  h1 {
    font-size: var(--font-size-2xl);
    line-height: 1.3;
  }

  h2 {
    font-size: var(--font-size-xl);
    line-height: 1.3;
  }

  h3 {
    font-size: var(--font-size-lg);
    line-height: 1.4;
  }

  /* Button improvements */
  .btn {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  /* Card improvements */
  .card,
  .support-section,
  .subscription-section {
    border-radius: var(--radius-md);
  }

  /* Navigation brand adjustments */
  .nav-brand img,
  .nav-brand-logo {
    height: var(--nav-logo-height-mobile, 22px);
  }

  .loading-shell-subtitle {
    font-size: var(--font-size-base);
  }

  /* User avatar in dropdown */
  .user-avatar {
    width: 36px;
    height: 36px;
  }

  /* Reduce spacing in lists */
  ul,
  ol {
    padding-left: var(--spacing-lg);
  }

  /* Improve tap targets in navigation */
  .nav-item {
    min-height: 48px;
    padding: var(--spacing-md);
  }

  /* Alert messages */
  .alert {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

@media (min-width: 640px) {
  .loading-shell-actions {
    flex-direction: row;
  }

  .loading-shell-actions .btn {
    width: auto;
    min-width: 12rem;
  }
}