/* =============================================
   NORTHERN NUMBERS — styles.css
   Global design system for NorthernNumbers.ca
   ============================================= */

/* =============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================= */
:root {
  /* Brand Colors */
  --color-primary:       #D52B1E;
  --color-primary-dark:  #B52318;
  --color-primary-light: #F9E5E4;

  /* Neutrals */
  --color-white:         #FFFFFF;
  --color-bg:            #F8F9FA;
  --color-border:        #E5E7EB;
  --color-text:          #1F2937;
  --color-text-muted:    #6B7280;
  --color-text-light:    #9CA3AF;

  /* Status */
  --color-success:       #16A34A;
  --color-success-light: #DCFCE7;
  --color-error:         #DC2626;
  --color-error-light:   #FEE2E2;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body:    'Inter', sans-serif;

  /* Type Scale */
  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.875rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */

  /* Spacing Scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md:  0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-lg:  0 10px 30px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.07);

  /* Layout */
  --container-max: 1200px;
  --header-height: 68px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}


/* =============================================
   2. RESET & BASE
   ============================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-text);
}

/* Screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus visible — keyboard accessibility */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}


/* =============================================
   3. LAYOUT — Container
   ============================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-12);
  }
}


/* =============================================
   4. HEADER & NAVIGATION
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo--light .logo-text {
  color: var(--color-white);
}

/* Desktop Nav */
.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background-color: var(--color-bg);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* Mobile hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

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

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger → X animation */
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

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

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

/* Tablet+ — show desktop nav, hide hamburger */
@media (min-width: 768px) {
  .main-nav {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-menu {
    display: none !important;
  }
}


/* =============================================
   5. BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

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

/* Primary — red fill */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(213, 43, 30, 0.3);
}

/* Secondary — outlined */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary-light);
}

/* Calc card button — small ghost */
.btn-calc {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  margin-top: auto;
  align-self: flex-start;
}

.btn-calc:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}


/* =============================================
   6. HERO SECTION
   ============================================= */
.hero {
  background: linear-gradient(160deg, #FFFFFF 60%, #FDF4F4 100%);
  padding: var(--space-16) 0 var(--space-12);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.hero-heading {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-5);
}

.hero-subheading {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Hero stats bar */
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  width: fit-content;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background-color: var(--color-border);
}

@media (min-width: 768px) {
  .hero-heading {
    font-size: var(--text-5xl);
  }
}


/* =============================================
   7. SEARCH SECTION
   ============================================= */
.search-section {
  padding: var(--space-8) 0 var(--space-4);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.search-wrapper {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-4) var(--space-4) calc(var(--space-4) + 28px);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input::placeholder {
  color: var(--color-text-light);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(213, 43, 30, 0.12);
}

/* Search results dropdown */
.search-results {
  max-width: 560px;
  margin: var(--space-2) auto 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: none;
}

.search-results.is-visible {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: background-color var(--transition-fast);
  text-decoration: none;
}

.search-result-item:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

.search-no-results {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}


/* =============================================
   8. CALCULATORS SECTION & CARDS
   ============================================= */
.calculators-section {
  padding: var(--space-16) 0;
  background: var(--color-bg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

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

/* Card grid — mobile first: 1 col → 2 col → 3 col */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 600px) {
  .calc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .calc-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Calculator Card */
.calc-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.calc-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: rgba(213, 43, 30, 0.2);
}

/* Coming soon card — muted appearance */
.calc-card--coming-soon {
  opacity: 0.65;
  border-style: dashed;
}

.calc-card--coming-soon:hover {
  transform: none;
  box-shadow: var(--shadow-card);
}

/* Card icon container */
.calc-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.calc-card--coming-soon .calc-card-icon {
  background: var(--color-bg);
}

/* Card text */
.calc-card-body {
  flex: 1;
}

.calc-card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.calc-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Coming soon badge */
.badge-coming-soon {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  align-self: flex-start;
}


/* =============================================
   9. TRUST SECTION
   ============================================= */
.trust-section {
  padding: var(--space-20) 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.trust-section .section-title {
  margin-bottom: var(--space-12);
}

.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 600px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
}

.trust-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--color-primary-light);
  border-radius: var(--radius-xl);
}

.trust-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.trust-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 240px;
}


/* =============================================
   10. FOOTER
   ============================================= */
.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.75);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer-inner {
    grid-template-columns: 1.5fr 2fr;
    align-items: start;
  }
}

/* Footer brand */
.footer-brand .logo-text {
  color: var(--color-white);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  margin-top: var(--space-1);
  font-weight: 500;
}

.footer-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
  margin-top: var(--space-4);
  max-width: 280px;
}

/* Footer nav */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 480px) {
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer-nav-heading {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-col a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-nav-col a:hover {
  color: var(--color-white);
}

/* Footer bottom */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer-bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-legal {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.6;
}

.footer-built {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
  white-space: nowrap;
}


/* =============================================
   11. CALCULATOR PAGE LAYOUT
   (Shared layout for all individual calc pages)
   ============================================= */
.calc-page {
  background: var(--color-bg);
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-10) 0 var(--space-20);
}

.calc-page-header {
  margin-bottom: var(--space-8);
}

.calc-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.calc-breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.calc-breadcrumb a:hover {
  text-decoration: underline;
}

.calc-breadcrumb-sep {
  color: var(--color-text-light);
}

.calc-page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.calc-page-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

/* Two-column layout: form + results */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 900px) {
  .calc-layout {
    grid-template-columns: 1fr 1fr;
  }
}

/* Card wrapper for form and results panels */
.calc-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-8);
}

.calc-panel-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-border);
}


/* =============================================
   12. FORM ELEMENTS
   (Shared across all calculator forms)
   ============================================= */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-hint {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: var(--space-1);
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(213, 43, 30, 0.12);
}

.form-input.is-error {
  border-color: var(--color-error);
}

.form-input.is-error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.form-error-msg {
  display: none;
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

.form-error-msg.is-visible {
  display: block;
}

/* Input with prefix/suffix (e.g. $ or %) */
.input-wrapper {
  position: relative;
}

.input-prefix,
.input-suffix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  pointer-events: none;
}

.input-prefix {
  left: var(--space-4);
}

.input-suffix {
  right: var(--space-4);
}

.input-wrapper .form-input.has-prefix {
  padding-left: calc(var(--space-4) + 18px);
}

.input-wrapper .form-input.has-suffix {
  padding-right: calc(var(--space-4) + 22px);
}

/* Toggle button group (e.g. Monthly / Bi-weekly) */
.toggle-group {
  display: flex;
  gap: 0;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.toggle-btn {
  flex: 1;
  padding: var(--space-3) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  text-align: center;
}

.toggle-btn:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.toggle-btn.is-active {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

/* Range slider */
.form-range {
  width: 100%;
  accent-color: var(--color-primary);
  cursor: pointer;
  height: 4px;
  margin-top: var(--space-2);
}

/* Submit/Calculate button — full width on calc forms */
.btn-calculate {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-lg);
  margin-top: var(--space-4);
}


/* =============================================
   13. RESULTS PANEL
   ============================================= */
.result-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-4);
  min-height: 200px;
  color: var(--color-text-muted);
}

.result-placeholder-icon {
  opacity: 0.3;
}

.result-placeholder p {
  font-size: var(--text-sm);
}

/* Result summary rows */
.result-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.result-row:last-child {
  border-bottom: none;
}

.result-row-label {
  color: var(--color-text-muted);
  font-weight: 500;
}

.result-row-value {
  font-weight: 700;
  color: var(--color-text);
  font-size: var(--text-base);
}

/* Highlighted total row */
.result-row--total {
  background: var(--color-primary-light);
  margin-inline: calc(-1 * var(--space-8));
  padding-inline: var(--space-8);
  border-radius: var(--radius-md);
  border: none;
  margin-top: var(--space-2);
  padding-block: var(--space-4);
}

.result-row--total .result-row-label {
  color: var(--color-text);
  font-weight: 700;
  font-size: var(--text-base);
}

.result-row--total .result-row-value {
  color: var(--color-primary);
  font-size: var(--text-xl);
}

/* Success / positive value */
.result-row-value.is-success {
  color: var(--color-success);
}


/* =============================================
   14. UTILITIES
   ============================================= */
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }

.hidden { display: none !important; }