/* CalcuSimpleHub — Custom styles (Tailwind handles most layout) */

:root {
  --color-primary: #0f766e;
  --color-primary-dark: #0d5f58;
  --color-accent: #14b8a6;
  --color-surface: #f8fafc;
  --color-card: #ffffff;
  --shadow-soft: 0 4px 24px -4px rgba(15, 118, 110, 0.12);
  --shadow-card: 0 8px 32px -8px rgba(15, 23, 42, 0.1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  background: linear-gradient(165deg, #f0fdfa 0%, #f8fafc 40%, #f1f5f9 100%);
  min-height: 100vh;
}

/* Navigation */
.nav-glass {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15, 118, 110, 0.08);
}

.nav-link {
  position: relative;
  transition: color var(--transition-smooth);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  width: 100%;
}

/* Hero — layered backgrounds (pattern must not replace the base gradient) */
.hero-section {
  background-color: #0f766e;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 40%),
    linear-gradient(135deg, #0f766e 0%, #14b8a6 50%, #2dd4bf 100%);
}

/* Hero illustration — inline SVG (no broken img / alt-text flash) */
.hero-visual {
  width: 100%;
  max-width: 400px;
  line-height: 0;
}

.hero-visual-svg {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
}

@media (min-width: 768px) {
  .hero-visual {
    animation: float-gentle 5s ease-in-out infinite;
  }
}

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

/* Site logo */
.site-logo-img {
  transition: transform var(--transition-smooth);
}

.site-logo:hover .site-logo-img {
  transform: scale(1.05);
}

.cta-pulse {
  animation: cta-glow 2.5s ease-in-out infinite;
}

@keyframes cta-glow {
  0%, 100% { box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15); }
  50% { box-shadow: 0 10px 35px -5px rgba(255, 255, 255, 0.4); }
}

/* Welcome banner */
.welcome-banner {
  animation: slide-down 0.5s ease;
}

.welcome-banner.is-visible {
  display: block !important;
}

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* How it works steps */
.step-card {
  text-align: center;
  padding: 1.5rem;
  border-radius: 1.25rem;
  background: white;
  border: 1px solid rgba(15, 118, 110, 0.08);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

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

.step-image-wrap {
  position: relative;
  display: inline-block;
}

.step-image {
  width: 100%;
  max-width: 280px;
  height: auto;
  border-radius: 0.75rem;
}

.step-badge {
  position: absolute;
  top: -8px;
  left: -8px;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f766e, #14b8a6);
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.35);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal:nth-child(2).is-visible { transition-delay: 0.1s; }
.reveal:nth-child(3).is-visible { transition-delay: 0.2s; }

.animate-bounce-subtle {
  animation: bounce-subtle 2s ease infinite;
}

@keyframes bounce-subtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* Calculator picker cards */
.calc-pick-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: 1rem;
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-align: center;
}

.calc-pick-card:hover {
  border-color: #99f6e4;
  background: #f0fdfa;
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.calc-pick-card.active {
  border-color: #14b8a6;
  background: linear-gradient(180deg, #f0fdfa 0%, #fff 100%);
  box-shadow: 0 8px 24px -8px rgba(15, 118, 110, 0.25);
}

.calc-pick-img {
  width: 100%;
  max-width: 120px;
  height: auto;
}

.calc-pick-title {
  font-weight: 700;
  font-size: 0.9375rem;
  color: #0f766e;
}

.calc-pick-desc {
  font-size: 0.75rem;
  color: #64748b;
}

/* Try example button */
.try-example-btn {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #0f766e;
  background: #f0fdfa;
  border: 1px dashed #14b8a6;
  border-radius: 0.625rem;
  transition: all var(--transition-smooth);
}

.try-example-btn:hover {
  background: #ccfbf1;
  border-style: solid;
  transform: scale(1.02);
}

.try-example-btn.flash {
  animation: flash-btn 0.6s ease;
}

@keyframes flash-btn {
  0%, 100% { background: #f0fdfa; }
  50% { background: #99f6e4; }
}

.panel-illus {
  transition: transform var(--transition-smooth);
}

.calc-panel.active .panel-illus {
  animation: pop-in 0.4s ease;
}

@keyframes pop-in {
  0% { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

.tab-btn .tab-icon {
  opacity: 0.7;
}

.tab-btn.active .tab-icon {
  opacity: 1;
  filter: brightness(0) invert(1);
}

#calc-step-indicator {
  transition: background var(--transition-smooth);
}

#calc-step-indicator.highlight {
  animation: step-pulse 0.8s ease;
}

@keyframes step-pulse {
  0%, 100% { background: #f0fdfa; }
  50% { background: #ccfbf1; }
}

/* Ad placeholders */
.ad-placeholder {
  background: #f1f5f9;
  border: 2px dashed #cbd5e1;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: border-color var(--transition-smooth), background var(--transition-smooth);
}

.ad-placeholder:hover {
  border-color: #94a3b8;
  background: #e2e8f0;
}

.ad-leaderboard {
  min-height: 90px;
}

.ad-rectangle {
  min-height: 250px;
}

/* Bottom promo strip */
.footer-promo-card {
  background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
  border-radius: 1.25rem;
  padding: 1.75rem 2rem;
  box-shadow: 0 12px 40px -12px rgba(15, 118, 110, 0.45);
  color: #fff;
  text-align: center;
}

.footer-promo-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-promo-logo {
  width: 3rem;
  height: 3rem;
  flex-shrink: 0;
  border-radius: 0.625rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.footer-promo-site-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer-promo-title {
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.3;
}

.footer-promo-text {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.92);
  margin-top: 0.5rem;
  line-height: 1.55;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.footer-promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.25rem;
}

.footer-promo-btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.625rem;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  transition: background var(--transition-smooth), transform var(--transition-smooth);
}

.footer-promo-btn:hover {
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-1px);
}

.footer-promo-btn--primary {
  background: #fff;
  color: #0f766e;
  border-color: #fff;
}

.footer-promo-btn--primary:hover {
  background: #f0fdfa;
}

/* Calculator cards */
.calc-card {
  background: var(--color-card);
  border-radius: 1.25rem;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(15, 118, 110, 0.06);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.calc-card:hover {
  box-shadow: 0 12px 40px -12px rgba(15, 23, 42, 0.14);
}

/* Tab buttons */
.tab-btn {
  transition: all var(--transition-smooth);
  border-radius: 0.75rem;
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white;
  box-shadow: 0 4px 16px -2px rgba(15, 118, 110, 0.35);
}

.tab-btn:not(.active):hover {
  background: #f0fdfa;
  color: var(--color-primary);
}

/* Calculator panels */
.calc-panel {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  position: absolute;
  inset: 0;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.calc-panel.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  position: relative;
}

.calc-panels-wrapper {
  position: relative;
  min-height: 480px;
}

@media (max-width: 640px) {
  .calc-panels-wrapper {
    min-height: 540px;
  }
}

/* Form inputs */
.input-field {
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.input-field:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
  outline: none;
}

.input-field.invalid {
  border-color: #f87171;
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}

/* Result boxes */
.result-box {
  background: linear-gradient(135deg, #f0fdfa 0%, #ecfdf5 100%);
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: 0.875rem;
  transition: transform var(--transition-smooth);
}

.result-value {
  font-variant-numeric: tabular-nums;
  transition: color var(--transition-smooth);
}

.result-value.updated {
  animation: pulse-result 0.4s ease;
}

@keyframes pulse-result {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
    color: var(--color-primary);
  }
  100% {
    transform: scale(1);
  }
}

/* Guide section typography */
.guide-content h3 {
  color: #0f766e;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.guide-content p {
  margin-bottom: 1rem;
  line-height: 1.75;
  color: #475569;
}

.guide-content--compact h3 {
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.guide-content--compact p {
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.65;
}

.guide-content--compact h3:first-of-type {
  margin-top: 0.5rem;
}

.guide-content ul {
  list-style: disc;
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  color: #475569;
}

.guide-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* Modal */
.modal-overlay {
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-smooth), visibility var(--transition-smooth);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-panel {
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-smooth);
}

.modal-overlay.open .modal-panel {
  transform: scale(1) translateY(0);
}

/* Mobile menu */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
}

.mobile-menu.open {
  max-height: 280px;
}

/* Footer */
.site-footer {
  border-top: 3px solid #0f766e;
}

.footer-heading {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-links .footer-link {
  color: #94a3b8;
  transition: color var(--transition-smooth), padding-left var(--transition-smooth);
  display: inline-block;
}

.footer-links .footer-link:hover {
  color: #2dd4bf;
  padding-left: 4px;
}

.footer-brand:hover .footer-brand img,
.footer-brand.group:hover img {
  filter: brightness(1.1);
}

.footer-bottom {
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    text-align: left;
  }
  .footer-bottom p:last-child {
    text-align: right;
  }
}

.footer-link {
  transition: color var(--transition-smooth);
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .hero-visual,
  .reveal {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}