/* eBay Fee Calculator — Premium design system */
:root {
  --efc-bg: #f4f7fb;
  --efc-bg-elevated: rgba(255, 255, 255, 0.72);
  --efc-bg-card: rgba(255, 255, 255, 0.78);
  --efc-border: rgba(15, 23, 42, 0.08);
  --efc-text: #0f172a;
  --efc-text-muted: #475569;
  --efc-accent: #0d9488;
  --efc-accent-2: #0284c7;
  --efc-accent-soft: rgba(13, 148, 136, 0.12);
  --efc-danger: #dc2626;
  --efc-success: #059669;
  --efc-warning: #d97706;
  --efc-shadow: 0 10px 40px rgba(15, 23, 42, 0.08);
  --efc-shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
  --efc-radius: 1rem;
  --efc-radius-lg: 1.5rem;
  --efc-nav-h: 72px;
  --efc-gradient: linear-gradient(135deg, #0d9488 0%, #0284c7 55%, #6366f1 100%);
  --efc-hero-glow: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(13, 148, 136, 0.25), transparent);
  --font-sans: "Outfit", ui-sans-serif, system-ui, sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;
}

html.dark {
  --efc-bg: #070b14;
  --efc-bg-elevated: rgba(15, 23, 42, 0.72);
  --efc-bg-card: rgba(17, 24, 39, 0.78);
  --efc-border: rgba(148, 163, 184, 0.12);
  --efc-text: #f1f5f9;
  --efc-text-muted: #94a3b8;
  --efc-accent: #2dd4bf;
  --efc-accent-2: #38bdf8;
  --efc-accent-soft: rgba(45, 212, 191, 0.14);
  --efc-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --efc-shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);
  --efc-hero-glow: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(45, 212, 191, 0.18), transparent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--efc-bg);
  color: var(--efc-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    var(--efc-hero-glow),
    radial-gradient(circle at 90% 10%, rgba(2, 132, 199, 0.12), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(13, 148, 136, 0.08), transparent 35%),
    linear-gradient(180deg, transparent 0%, var(--efc-bg) 100%);
}

h1, h2, h3, h4, .font-display {
  font-family: var(--font-sans);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.prose-serif {
  font-family: var(--font-serif);
}

.glass {
  background: var(--efc-bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--efc-border);
  box-shadow: var(--efc-shadow);
  border-radius: var(--efc-radius);
}

.glass-strong {
  background: var(--efc-bg-elevated);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--efc-border);
  box-shadow: var(--efc-shadow-lg);
  border-radius: var(--efc-radius-lg);
}

.nav-shell {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--efc-nav-h);
  background: color-mix(in srgb, var(--efc-bg) 75%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--efc-border);
}

.brand-mark {
  background: var(--efc-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #0d9488, #0284c7);
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 8px 24px rgba(13, 148, 136, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.15rem;
  border-radius: 0.85rem;
  font-weight: 600;
  color: var(--efc-text);
  background: transparent;
  border: 1px solid var(--efc-border);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-ghost:hover {
  background: var(--efc-accent-soft);
  border-color: color-mix(in srgb, var(--efc-accent) 35%, var(--efc-border));
}

.input-field {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: 0.75rem;
  border: 1px solid var(--efc-border);
  background: color-mix(in srgb, var(--efc-bg) 70%, transparent);
  color: var(--efc-text);
  font: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-field:focus {
  outline: none;
  border-color: var(--efc-accent);
  box-shadow: 0 0 0 3px var(--efc-accent-soft);
}

.label-field {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--efc-text-muted);
  margin-bottom: 0.35rem;
}

.result-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.result-value.positive { color: var(--efc-success); }
.result-value.negative { color: var(--efc-danger); }
.result-value.accent { color: var(--efc-accent); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--efc-accent-soft);
  color: var(--efc-accent);
}

.section-pad {
  padding: 4.5rem 1.25rem;
}

@media (min-width: 768px) {
  .section-pad { padding: 6rem 1.5rem; }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.hover-lift {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.grid-bg {
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--efc-border) 70%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--efc-border) 70%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--efc-accent);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
  border-radius: 0 0 0.5rem 0;
}

.skip-link:focus {
  left: 0;
}

.chart-wrap {
  position: relative;
  height: 260px;
  width: 100%;
}

.mobile-menu {
  display: none;
}

.mobile-menu.open {
  display: block;
}

.footer-link {
  color: var(--efc-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.prose-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.75rem;
}

.prose-content h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.prose-content p {
  margin-bottom: 1.1rem;
  color: var(--efc-text-muted);
}

.prose-content ul, .prose-content ol {
  margin: 0 0 1.25rem 1.25rem;
  color: var(--efc-text-muted);
}

.prose-content li { margin-bottom: 0.4rem; }

.prose-content a {
  color: var(--efc-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item[open] {
  border-color: color-mix(in srgb, var(--efc-accent) 40%, var(--efc-border));
}

.toast {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 80;
  padding: 0.85rem 1.1rem;
  border-radius: 0.85rem;
  background: var(--efc-bg-elevated);
  border: 1px solid var(--efc-border);
  box-shadow: var(--efc-shadow-lg);
  transform: translateY(120%);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

@media print {
  .nav-shell, .no-print, footer, .btn-primary, .btn-ghost { display: none !important; }
  body { background: #fff; color: #000; }
  .glass, .glass-strong { box-shadow: none; border: 1px solid #ddd; }
}

@keyframes float-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.float-soft { animation: float-soft 6s ease-in-out infinite; }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.35); }
  50% { box-shadow: 0 0 0 12px rgba(13, 148, 136, 0); }
}

.pulse-glow { animation: pulse-glow 2.8s ease-out infinite; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}


.flag {
  font-style: normal;
  margin-right: 0.15em;
}

.country-flag {
  font-size: 1.35em;
  line-height: 1;
  margin-right: 0.35rem;
  vertical-align: -0.1em;
}

select.input-field option {
  font-size: 1rem;
}


/* Country flag images + custom select (emoji flags break on Windows) */
.country-flag-img {
  width: 22px;
  height: 14px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.12);
  flex-shrink: 0;
}

html.dark .country-flag-img {
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.25);
}

.country-flag-lg {
  width: 40px;
  height: 20px;
  border-radius: 4px;
}

.country-select {
  position: relative;
}

.country-select-native {
  position: absolute !important;
  opacity: 0 !important;
  pointer-events: none !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

.country-select-trigger {
  display: flex !important;
  align-items: center;
  gap: 0.65rem;
  text-align: left;
  cursor: pointer;
  width: 100%;
}

.country-select-trigger .country-select-caret {
  margin-left: auto;
  opacity: 0.7;
}

.country-select-menu {
  position: absolute;
  z-index: 40;
  left: 0;
  right: 0;
  top: calc(100% + 6px);
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  border-radius: 0.85rem;
  border: 1px solid var(--efc-border);
  background: var(--efc-bg-elevated);
  backdrop-filter: blur(18px);
  box-shadow: var(--efc-shadow-lg);
  max-height: 260px;
  overflow: auto;
}

.country-select-menu[hidden] {
  display: none !important;
}

.country-select-menu li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0.65rem;
  cursor: pointer;
  font-size: 0.95rem;
}

.country-select-menu li:hover,
.country-select-menu li[aria-selected="true"] {
  background: var(--efc-accent-soft);
}

.country-chip {
  display: inline-flex !important;
  align-items: center;
  gap: 0.4rem;
}