/* =========================================================
   SplitMath — Design tokens
   ========================================================= */
:root {
  --color-bg: #f6f7fc;
  --color-surface: #ffffff;
  --color-surface-soft: #f0f1fa;
  --color-ink: #14172b;
  --color-ink-soft: #565a72;
  --color-ink-faint: #8589a3;
  --color-border: #e6e7f2;
  --color-border-strong: #d3d5e8;

  --color-primary: #4f46e5;
  --color-primary-dark: #3c33c4;
  --color-primary-soft: #eceafd;
  --color-accent: #0d9488;
  --color-accent-soft: #dcf7f2;
  --color-coral: #ff6a5f;
  --color-coral-soft: #ffe6e2;
  --color-warn: #b45309;
  --color-warn-bg: #fef3c7;
  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-danger: #dc2626;

  --gradient-hero: radial-gradient(circle at 15% 10%, #eef2ff 0%, transparent 45%),
    radial-gradient(circle at 85% 0%, #e0fdf7 0%, transparent 45%),
    linear-gradient(180deg, #f8f9ff 0%, #f6f7fc 100%);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #22d3ee 100%);
  --gradient-coral: linear-gradient(135deg, #ff6a5f 0%, #ff9966 100%);

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(20, 23, 43, 0.06), 0 1px 1px rgba(20, 23, 43, 0.04);
  --shadow-md: 0 8px 24px rgba(20, 23, 43, 0.08), 0 2px 6px rgba(20, 23, 43, 0.04);
  --shadow-lg: 0 20px 50px rgba(38, 34, 90, 0.14);
  --shadow-glow: 0 12px 32px rgba(79, 70, 229, 0.28);

  --container: 1180px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.15s;
  --dur-med: 0.35s;
  --dur-slow: 0.6s;
}

/* =========================================================
   Reset & base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

/* =========================================================
   Utility / type
   ========================================================= */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}
.section {
  padding: 72px 0;
}
.section-head {
  max-width: 640px;
  margin: 0 0 40px;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: -0.02em;
  margin-top: 14px;
}
.section-head p {
  margin-top: 12px;
  color: var(--color-ink-soft);
  font-size: 1.05rem;
}
.text-center { text-align: center; margin-left: auto; margin-right: auto; }

/* Scroll-in animation hooks */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}
[data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
[data-animate-stagger].in-view > * {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(79, 70, 229, 0.34); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-ink);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  color: var(--color-ink-soft);
  border-color: var(--color-border);
}
.btn-ghost:hover { background: var(--color-surface-soft); color: var(--color-ink); }
.btn-sm { padding: 9px 16px; font-size: 0.86rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-icon {
  width: 40px; height: 40px; padding: 0; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-surface-soft); border: 1px solid var(--color-border);
}
.btn-icon:hover { background: var(--color-primary-soft); color: var(--color-primary); }

/* =========================================================
   Nav
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(246, 247, 252, 0.82);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--gradient-primary);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.05rem; font-weight: 800;
  box-shadow: var(--shadow-glow);
}
.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
  font-weight: 600;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-primary); }
.nav-cta { display: none; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: inline-flex;
  background: none; border: 1px solid var(--color-border-strong);
  border-radius: 10px; padding: 8px 10px;
}
.nav-toggle svg { width: 20px; height: 20px; }
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 10px 0 18px;
  border-top: 1px solid var(--color-border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 6px;
  font-weight: 600;
  color: var(--color-ink-soft);
  border-radius: 10px;
}
.mobile-menu a:hover { background: var(--color-surface-soft); color: var(--color-ink); }
.mobile-menu .btn { margin-top: 6px; }

@media (min-width: 860px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  background: var(--gradient-hero);
  padding: 56px 0 72px;
  overflow: clip;
}
.hero-grid {
  display: grid;
  gap: 42px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.3rem, 6vw, 3.6rem);
  letter-spacing: -0.03em;
  line-height: 1.08;
  background: linear-gradient(135deg, #16183a, #4335c9 120%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-copy p.subhead {
  margin-top: 18px;
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--color-ink-soft);
  max-width: 46ch;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.hero-microcopy {
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  font-weight: 600;
}
/* Hero preview mock card + illustration */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.hero-illustration {
  width: 100%;
  max-width: 380px;
  height: auto;
  animation: floaty 7s ease-in-out infinite;
  animation-delay: 0.4s;
}
.preview-card {
  width: 100%;
  max-width: 320px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  animation: floaty 6s ease-in-out infinite;
  border: 1px solid var(--color-border);
}
@media (min-width: 480px) {
  .preview-card { padding: 26px; }
}
@media (min-width: 640px) {
  .hero-visual { flex-direction: row; align-items: center; gap: 24px; }
  .hero-illustration { max-width: 460px; flex-shrink: 0; }
  .preview-card { max-width: 340px; flex-shrink: 1; }
}
@media (min-width: 900px) {
  .hero-illustration { max-width: 520px; }
}
.preview-card-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 4px 10px;
  margin-bottom: 14px;
}
.preview-card-head span { font-weight: 700; color: var(--color-ink-soft); font-size: clamp(0.62rem, 2vw, 0.85rem); white-space: nowrap; }
.preview-total { font-size: clamp(1.3rem, 6vw, 2.1rem); font-weight: 800; letter-spacing: -0.02em; }
.preview-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-success-bg); color: var(--color-success);
  font-size: clamp(0.66rem, 1.8vw, 0.78rem); font-weight: 700; padding: 5px 12px; border-radius: var(--radius-pill);
  margin-top: 8px;
}
.preview-bar {
  display: flex; height: 14px; border-radius: var(--radius-pill); overflow: hidden;
  margin: 20px 0 16px; box-shadow: inset 0 0 0 1px var(--color-border);
}
.preview-bar span { height: 100%; }
.preview-people { display: flex; flex-direction: column; gap: 10px; }
.preview-person {
  display: flex; align-items: center; justify-content: space-between;
  font-size: clamp(0.72rem, 2vw, 0.9rem); font-weight: 600; color: var(--color-ink-soft);
}
.preview-person .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 8px; }
.preview-person strong { color: var(--color-ink); }

@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(-0.4deg); }
  50% { transform: translateY(-10px) rotate(0.4deg); }
}

/* =========================================================
   Use-case cards
   ========================================================= */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
@media (min-width: 640px) { .usecase-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 960px) { .usecase-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.usecase-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out);
}
.usecase-card:hover, .usecase-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.usecase-icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  background: var(--color-primary-soft);
  margin-bottom: 14px;
  transition: transform var(--dur-med) var(--ease-out);
}
.usecase-card:hover .usecase-icon { transform: scale(1.1) rotate(-4deg); }
.usecase-card h3 { font-size: 1.02rem; letter-spacing: -0.01em; }
.usecase-card p { margin-top: 6px; font-size: 0.87rem; color: var(--color-ink-soft); }
.go {
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: 12px; font-size: 0.82rem; font-weight: 700; color: var(--color-primary);
}
.go:hover { text-decoration: underline; }

/* =========================================================
   Methods section
   ========================================================= */
.methods-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 800px) { .methods-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.method-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}
.method-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.method-num {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--color-ink); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.9rem; margin-bottom: 16px;
}
.method-card:nth-child(1) .method-num { background: var(--gradient-primary); }
.method-card:nth-child(2) .method-num { background: var(--gradient-coral); }
.method-card:nth-child(3) .method-num { background: linear-gradient(135deg, #0d9488, #14b8a6); }
.method-card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.method-card p { color: var(--color-ink-soft); font-size: 0.93rem; }
.method-demo { display: flex; gap: 6px; margin-top: 18px; height: 10px; }
.method-demo span { border-radius: var(--radius-pill); background: var(--color-border-strong); }

/* =========================================================
   SEO copy section
   ========================================================= */
.seo-grid {
  display: grid;
  gap: 26px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 760px) { .seo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.seo-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.seo-item p { color: var(--color-ink-soft); font-size: 0.95rem; }
.seo-section { background: var(--color-surface); }

/* =========================================================
   FAQ
   ========================================================= */
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 780px; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: none;
  text-align: left;
  font-weight: 700;
  font-size: 1rem;
}
.faq-question .plus {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--color-surface-soft);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform var(--dur-med) var(--ease-out), background var(--dur-med) var(--ease-out);
}
.faq-item[data-open="true"] .faq-question .plus { transform: rotate(45deg); background: var(--color-primary-soft); color: var(--color-primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-med) var(--ease-out), padding var(--dur-med) var(--ease-out);
  padding: 0 22px;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}
.faq-item[data-open="true"] .faq-answer { padding: 0 22px 20px; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0 30px;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}
@media (min-width: 700px) {
  .footer-grid { flex-direction: row; justify-content: space-between; align-items: center; }
}
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; font-weight: 600; color: var(--color-ink-soft); font-size: 0.92rem; }
.footer-links a:hover { color: var(--color-primary); }
.footer-tag { color: var(--color-ink-faint); font-size: 0.85rem; margin-top: 6px; }
.footer-calculators {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-ink-faint);
}
.footer-calculators a:hover { color: var(--color-primary); }

/* =========================================================
   Calculator page layout
   ========================================================= */
.calc-hero {
  background: var(--gradient-hero);
  padding: 40px 0 30px;
}
.calc-hero h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); letter-spacing: -0.02em; }
.calc-hero p { margin-top: 10px; color: var(--color-ink-soft); max-width: 60ch; }

.calc-layout {
  display: grid;
  gap: 22px;
  padding: 32px 0 100px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 980px) {
  .calc-layout { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: start; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 26px;
}
.card + .card { margin-top: 20px; }
.card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.card-step {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--color-primary-soft); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 800; flex-shrink: 0;
}
.card-sub { color: var(--color-ink-soft); font-size: 0.9rem; margin-bottom: 18px; }

/* Category picker */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
@media (min-width: 620px) { .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.category-option { position: relative; }
.category-option input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; cursor: pointer; }
.category-option label {
  display: flex; flex-direction: column; gap: 8px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  cursor: pointer;
  height: 100%;
}
.category-option label .icon { font-size: 1.3rem; }
.category-option label .name { font-weight: 700; font-size: 0.92rem; }
.category-option input:checked + label {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  transform: translateY(-2px);
}
.category-option input:focus-visible + label { outline: 3px solid var(--color-primary); outline-offset: 2px; }
.category-option label:hover { border-color: var(--color-border-strong); }

/* People list */
.people-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.person-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--color-surface-soft);
  border-radius: var(--radius-sm);
  padding: 10px 10px 10px 14px;
  animation: pop-in var(--dur-med) var(--ease-out);
}
.person-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 0.85rem; flex-shrink: 0;
}
.person-row input[type="text"] {
  flex: 1;
  border: 1px solid transparent;
  background: transparent;
  padding: 8px 10px;
  border-radius: 8px;
  font-weight: 600;
  min-width: 0;
}
.person-row input[type="text"]:hover, .person-row input[type="text"]:focus {
  border-color: var(--color-border-strong);
  background: var(--color-surface);
}
.people-actions { display: flex; gap: 10px; align-items: center; }
.people-count-label { color: var(--color-ink-soft); font-size: 0.85rem; font-weight: 600; }

@keyframes pop-in {
  from { opacity: 0; transform: scale(0.94) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* Expense fields */
.field-grid { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 620px) { .field-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label { font-size: 0.86rem; font-weight: 600; color: var(--color-ink-soft); }
.input-money {
  position: relative;
}
.input-money::before {
  content: "$";
  position: absolute;
  left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--color-ink-faint);
  font-weight: 600;
  pointer-events: none;
}
.input-money input {
  width: 100%;
  padding: 12px 12px 12px 26px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-bg);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.input-money input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
  outline: none;
}
.field-custom { display: flex; gap: 8px; align-items: center; }
.field-custom input[type="text"] {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  background: var(--color-bg);
  width: 100%;
}
.field-custom input[type="text"]:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 4px var(--color-primary-soft); }
.field-remove {
  background: none; border: none; color: var(--color-ink-faint);
  width: 30px; height: 30px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.field-remove:hover { background: var(--color-coral-soft); color: var(--color-coral); }
.add-custom-btn { margin-top: 16px; }

/* Method tabs */
.method-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  background: var(--color-surface-soft);
  padding: 6px;
  border-radius: var(--radius-pill);
  margin-bottom: 22px;
}
.method-tab {
  border: none;
  background: transparent;
  padding: 10px 8px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.method-tab[aria-selected="true"] {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.method-panel { display: none; animation: fade-slide var(--dur-med) var(--ease-out); }
.method-panel.active { display: block; }
@keyframes fade-slide {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.percentage-row, .income-row {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap: 6px 14px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.percentage-row:last-of-type, .income-row:last-of-type { border-bottom: none; }
.row-name { font-weight: 700; font-size: 0.92rem; grid-column: 1 / -1; display: flex; align-items: center; gap: 8px; }
.row-name .dot { width: 10px; height: 10px; border-radius: 50%; }
.slider-wrap { display: flex; align-items: center; gap: 12px; }
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-border-strong);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(79,70,229,0.5);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(79,70,229,0.5);
  cursor: pointer;
}
.pct-number {
  width: 74px; flex-shrink: 0;
  display: flex; align-items: center;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  background: var(--color-bg);
}
.pct-number input {
  border: none; background: transparent; width: 100%; text-align: right; font-weight: 700;
}
.pct-number input:focus { outline: none; }
.pct-number span { color: var(--color-ink-faint); font-weight: 700; margin-left: 2px; }

.income-input { width: 100%; }

.method-totalbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--color-border-strong);
  flex-wrap: wrap;
}
.pct-total-readout { font-weight: 800; font-size: 1.05rem; }
.pct-total-readout.ok { color: var(--color-success); }
.pct-total-readout.warn { color: var(--color-warn); }

.validation-msg {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  font-weight: 600;
  margin-top: 14px;
}
.validation-msg.warn { background: var(--color-warn-bg); color: var(--color-warn); }
.validation-msg.ok { background: var(--color-success-bg); color: var(--color-success); }

.even-note {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 18px;
  background: var(--color-surface-soft);
  border-radius: var(--radius-md);
}
.even-note .emoji { font-size: 1.6rem; }
.even-note strong { display: block; }
.even-note span { color: var(--color-ink-soft); font-size: 0.9rem; }

/* =========================================================
   Results panel
   ========================================================= */
.results-panel {
  position: relative;
}
@media (min-width: 980px) {
  .results-panel { position: sticky; top: 92px; }
}
.results-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: 26px;
  overflow: hidden;
  position: relative;
}
.results-card::before {
  content: "";
  position: absolute; inset: -40% -40% auto auto;
  width: 220px; height: 220px;
  background: var(--gradient-primary);
  opacity: 0.12;
  border-radius: 50%;
  filter: blur(10px);
}
.results-head { position: relative; display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.results-head h2 { font-size: 1.15rem; }
.results-total-label { color: var(--color-ink-soft); font-size: 0.85rem; font-weight: 600; margin-top: 14px; }
.results-total { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em; position: relative; }
.results-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.8rem; font-weight: 700; padding: 6px 14px;
  border-radius: var(--radius-pill); margin-top: 10px;
}
.results-badge.even, .results-badge.balanced { background: var(--color-success-bg); color: var(--color-success); }
.results-badge.income { background: var(--color-accent-soft); color: var(--color-accent); }
.results-badge.needs-adjustment { background: var(--color-warn-bg); color: var(--color-warn); }

.breakdown-bar {
  display: flex; height: 16px; border-radius: var(--radius-pill);
  overflow: hidden; margin: 22px 0 18px;
  box-shadow: inset 0 0 0 1px var(--color-border);
}
.breakdown-bar span { height: 100%; transition: width var(--dur-slow) var(--ease-out); }

.results-people { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.results-person {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 0; border-bottom: 1px solid var(--color-border);
  gap: 10px;
}
.results-person:last-child { border-bottom: none; }
.results-person .who { display: flex; align-items: center; gap: 10px; font-weight: 700; min-width: 0; }
.results-person .who .dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.results-person .who span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.results-person .amounts { text-align: right; flex-shrink: 0; }
.results-person .amounts strong { display: block; font-size: 1rem; }
.results-person .amounts small { color: var(--color-ink-soft); font-size: 0.78rem; }

.results-empty {
  text-align: center;
  padding: 30px 10px;
  color: var(--color-ink-soft);
}
.results-empty .emoji { font-size: 2.4rem; margin-bottom: 10px; }
.results-empty strong { display: block; color: var(--color-ink); margin-bottom: 6px; }

.results-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 6px; }
.results-actions .btn { justify-content: center; }
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-ink);
  color: #fff;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  z-index: 300;
  box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Mobile sticky summary bar */
.mobile-summary {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -8px 24px rgba(20,23,43,0.1);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  transform: translateY(120%);
  transition: transform var(--dur-med) var(--ease-out);
}
.mobile-summary.show { transform: translateY(0); }
.mobile-summary .msum-total { font-weight: 800; font-size: 1.15rem; }
.mobile-summary .msum-total small { display: block; font-weight: 600; color: var(--color-ink-soft); font-size: 0.72rem; }
@media (min-width: 980px) { .mobile-summary { display: none; } }

/* =========================================================
   FAQ link box (calculator page)
   ========================================================= */
.faq-link-box {
  display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  background: var(--color-surface-soft);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-top: 8px;
}

/* =========================================================
   Simple content pages (privacy/terms)
   ========================================================= */
.legal {
  padding: 60px 0 90px;
  max-width: 760px;
  margin: 0 auto;
}
.legal h1 { font-size: 2rem; margin-bottom: 8px; }
.legal .updated { color: var(--color-ink-faint); font-size: 0.85rem; margin-bottom: 30px; }
.legal h2 { font-size: 1.2rem; margin: 30px 0 10px; }
.legal p, .legal li { color: var(--color-ink-soft); font-size: 0.96rem; line-height: 1.7; }
.legal li { margin-left: 22px; }

/* =========================================================
   Landing page article content (dedicated calculator pages)
   ========================================================= */
.article-copy { max-width: 780px; }
.article-copy h2 { font-size: 1.4rem; letter-spacing: -0.01em; margin: 0 0 14px; }
.article-copy h2:not(:first-child) { margin-top: 44px; }
.article-copy p { color: var(--color-ink-soft); font-size: 0.98rem; line-height: 1.75; margin-bottom: 14px; }
.article-copy ul { margin: 0 0 14px; }
.article-copy li { color: var(--color-ink-soft); font-size: 0.98rem; line-height: 1.75; margin-left: 22px; list-style: disc; }
.article-copy li + li { margin-top: 6px; }
.related-calcs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

/* =========================================================
   Money burst canvas
   ========================================================= */
#money-burst-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 400;
}

/* Print */
@media print {
  .site-header, .site-footer, .mobile-summary, .card:not(.print-results), .results-actions, .toast, .calc-hero { display: none !important; }
  .calc-layout { display: block; padding: 0; }
  .results-panel { position: static; }
  body { background: #fff; }
}