/* ===================================================================
   Random Tools — Design System CSS
   Based on StyleGuide.md (Bankrate-inspired)
   =================================================================== */

/* --- 0. Font Face Declarations --- */
@font-face {
  font-family: 'CircularStd';
  src: url('/fonts/CircularStd-Book.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'CircularStd';
  src: url('/fonts/CircularStd-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* --- 1. CSS Custom Properties --- */
:root {
  /* Brand - Bankrate Blue */
  --color-primary: #0157FF;
  --color-primary-hover: #0044CC;
  --color-primary-dark: #003399;

  /* Accent */
  --color-accent: #00875A;
  --color-accent-light: #00A86B;

  /* Neutrals - Bankrate Clean Grays */
  --color-black: #1A1A1A;
  --color-gray-900: #2D2D2D;
  --color-gray-950: #151515;
  --color-gray-700: #555555;
  --color-gray-500: #888888;
  --color-gray-400: #AAAAAA;
  --color-gray-300: #CCCCCC;
  --color-gray-200: #E5E5E5;
  --color-gray-100: #F5F5F5;
  --color-gray-50: #FAFAFA;
  --color-white: #FFFFFF;

  /* Functional */
  --color-error: #D32F2F;
  --color-warning: #F9A825;
  --color-success: #00875A;
  --color-info: #0157FF;

  /* Calculator */
  --color-result-bg: #E8F5E9;
  --color-input-border: #CCCCCC;
  --color-input-focus: #0157FF;
  --color-input-error: #D32F2F;

  /* Typography - Bankrate uses system fonts */
  --font-primary: CircularStd, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Spacing (4px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-xl: 0 8px 32px rgba(0,0,0,0.12);
}

/* --- 2. Base Reset & Typography --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  position: relative;
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-gray-900);
  background: var(--color-white);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-black);
  margin-top: 0;
  margin-bottom: var(--space-5);
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.25;
}

h2 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
}

h3 {
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1.35;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin-top: 0;
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

a:hover, a:focus {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  background: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-gray-900);
}

/* --- 3. Layout --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- 4. Header --- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.06);
  transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-black);
  padding: var(--space-4) 0;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.8;
  text-decoration: none;
}

.logo i {
  font-size: 1.5rem;
  color: var(--color-primary);
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: -0.01em;
}

.main-nav {
  display: none;
  gap: 0;
  height: 100%;
  align-items: stretch;
}

.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
  height: 72px;
  letter-spacing: -0.25px;
  transition: background-color 0.2s ease-in-out, border-bottom 0.2s ease-in-out, color 0.2s ease-in-out;
  border-bottom: 4px solid transparent;
}

.nav-dropdown-toggle {
  font-weight: 400;
  font-size: 16px;
  color: var(--color-gray-950);
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  transition: color 0.2s ease-in-out;
  height: 100%;
  letter-spacing: 0.016em;
  line-height: 1.4;
  position: relative;
}

.nav-dropdown-toggle:hover {
  color: var(--color-black);
}

.nav-dropdown.active,
.nav-dropdown:hover {
  border-bottom-color: var(--color-primary);
}

.nav-dropdown.active .nav-dropdown-toggle,
.nav-dropdown:hover .nav-dropdown-toggle {
  color: var(--color-black);
}

.nav-dropdown-toggle i {
  font-size: 10px;
  transition: transform var(--transition-fast);
  color: var(--color-gray-500);
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  padding: var(--space-5);
  min-width: 600px;
  margin-top: -3px;
  z-index: 200;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-6);
}

/* Wider mega-menus for calculator dropdowns */
.nav-dropdown-menu-wide {
  min-width: 800px;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 900px) {
  .nav-dropdown-menu-wide {
    min-width: 600px;
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 680px) {
  .nav-dropdown-menu-wide {
    min-width: 400px;
    grid-template-columns: repeat(2, 1fr);
  }
}

.nav-dropdown:hover .nav-dropdown-menu {
  display: grid;
}

.nav-dropdown:hover .nav-dropdown-toggle i {
  transform: rotate(180deg);
}

.nav-dropdown-section h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-700);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: var(--space-3);
  padding-bottom: 0;
  border-bottom: none;
}

.nav-dropdown-section a {
  display: block;
  font-size: 15px;
  color: var(--color-gray-900);
  padding: 8px 0;
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 400;
}

.nav-dropdown-section a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-black);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-7px);
}

@media (min-width: 55em) {
  .main-nav {
    display: flex;
  }
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Nav Open */
@media (max-width: 54.99em) {
  .main-nav.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    padding: var(--space-6);
    overflow-y: auto;
    z-index: 150;
    gap: 0;
    height: auto;
  }

  .main-nav.active .nav-dropdown {
    width: 100%;
    border-bottom: 1px solid var(--color-gray-200);
  }

  .main-nav.active .nav-dropdown-menu {
    position: static;
    min-width: auto;
    border: none;
    box-shadow: none;
    padding: 0 0 var(--space-4) var(--space-5);
    margin-top: 0;
    display: none;
    grid-template-columns: 1fr;
  }

  .main-nav.active .nav-dropdown.active .nav-dropdown-menu {
    display: grid;
  }

  .main-nav.active .nav-dropdown {
    border-bottom: 1px solid var(--color-gray-200);
  }

  .main-nav.active .nav-dropdown-toggle {
    padding: var(--space-4) 0;
    font-size: 17px;
    height: auto;
    width: 100%;
    justify-content: space-between;
  }
}

/* --- 5. Footer --- */
.site-footer {
  background: linear-gradient(180deg, #1A1A1A 0%, #0F0F0F 100%);
  color: var(--color-gray-400);
  padding: var(--space-12) 0 var(--space-6);
  margin-top: var(--space-16);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-column h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: var(--space-2);
}

.footer-column a {
  color: var(--color-gray-400);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  margin-top: var(--space-4);
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom p {
  margin: 0;
}

/* --- 6. Buttons --- */
.btn-primary {
  background: #0157FF;
  color: var(--color-white);
  font-weight: 600;
  font-size: 16px;
  height: 48px;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.btn-primary:hover {
  background: #0044CC;
  color: var(--color-white);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.btn-primary:active {
  background: #003399;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 16px;
  height: 48px;
  padding: var(--space-3) var(--space-6);
  border: 2px solid var(--color-primary);
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
  border-color: var(--color-primary-hover);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
  font-size: 16px;
  height: 48px;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.btn-accent:hover {
  background: var(--color-accent-light);
  color: var(--color-white);
}

.btn-sm {
  height: 36px;
  font-size: 14px;
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-accent:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* --- 7. Form Components --- */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 700;
  font-size: 15px;
  color: #1A1A1A;
  margin-bottom: 8px;
  line-height: 1.4;
}

.form-group .help-text {
  font-size: 13px;
  color: #555555;
  margin-top: 6px;
  line-height: 1.5;
}

.form-group .error-text {
  font-size: 13px;
  color: var(--color-error);
  margin-top: 6px;
}

.form-input {
  background: var(--color-white);
  border: 1px solid #333333;
  height: 52px;
  padding: 14px 16px;
  border-radius: 4px;
  font-size: 17px;
  font-weight: 400;
  font-family: var(--font-primary);
  color: #1A1A1A;
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  border: 2px solid #0157FF;
  outline: none;
  padding: 13px 15px;
  box-shadow: 0 0 0 3px rgba(1, 87, 255, 0.1);
}

.form-input::placeholder {
  color: #888888;
}

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

textarea.form-input {
  height: auto;
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
  padding: 16px;
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%230157FF' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

/* Checkbox Group */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: #0157FF;
}

.form-check label,
.form-check span {
  font-size: 15px;
  font-weight: 400;
  color: #1A1A1A;
  margin: 0;
  cursor: pointer;
}

/* Split Input Group */
.form-input-group {
  display: flex;
  gap: 8px;
}

.form-input-group .form-input {
  flex: 1;
}

.form-input-group .form-input.input-short {
  flex: 0 0 120px;
}

/* Input Prefix (Dollar Sign) */
.form-input-prefix {
  position: relative;
  flex: 1;
}

.form-input-prefix input {
  padding-left: 32px;
}

.form-input-prefix::before {
  content: '$';
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: #1A1A1A;
  font-size: 17px;
  font-weight: 400;
  pointer-events: none;
  z-index: 1;
}

/* Input Suffix (Percent Sign) */
.form-input-suffix {
  position: relative;
  flex: 0 0 120px;
}

.form-input-suffix input {
  padding-right: 32px;
}

.form-input-suffix::after {
  content: '%';
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: #1A1A1A;
  font-size: 17px;
  font-weight: 400;
  pointer-events: none;
  z-index: 1;
}

/* Label with Info Icon */
.label-with-info {
  display: flex;
  align-items: center;
  gap: 6px;
}

.info-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid #0157FF;
  color: #0157FF;
  font-size: 12px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: help;
  flex-shrink: 0;
}

.form-toggle {
  display: flex;
  border-radius: 4px;
  overflow: hidden;
  width: 100%;
}

.form-toggle button {
  flex: 1;
  height: 52px;
  padding: 14px 16px;
  border: 1px solid #CCCCCC;
  background: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  color: #1A1A1A;
  cursor: pointer;
  transition: all 150ms ease;
  position: relative;
}

.form-toggle button:first-child {
  border-radius: 4px 0 0 4px;
}

.form-toggle button:last-child {
  border-radius: 0 4px 4px 0;
  border-left: none;
}

.form-toggle button:not(:first-child):not(:last-child) {
  border-radius: 0;
  border-left: none;
}

.form-toggle button.active {
  background: #F0F7FF;
  border: 2px solid #0157FF;
  color: #0157FF;
  z-index: 1;
  margin: -1px;
}

.form-toggle button:not(.active):hover {
  background: #FAFAFA;
  border-color: #999999;
}

/* --- 8. Calculator Widget --- */
.calculator {
  background: var(--color-white);
  border: 1px solid #E5E5E5;
  border-top: 5px solid #0157FF;
  border-radius: 8px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  margin-bottom: var(--space-8);
  overflow: hidden;
}

@media (min-width: 40em) {
  .calculator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }
}

.calculator-inputs {
  display: flex;
  flex-direction: column;
  padding: 40px 32px;
  background: #FFFFFF;
}

.calculator-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: 40px 32px;
  background: #EBF0F5;
}

@media (min-width: 40em) {
  .calculator-results {
    position: sticky;
    top: 92px;
    align-self: start;
  }
}

/* --- 9. Result Display --- */
.result-block {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 32px;
  text-align: center;
}

.result-label {
  font-size: 16px;
  font-weight: 600;
  color: #1A1A1A;
  display: block;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.result-value {
  font-size: 48px;
  font-weight: 700;
  color: #1A1A1A;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.result-description {
  font-size: 15px;
  font-weight: 400;
  color: #555555;
  line-height: 1.6;
  text-align: center;
  margin-top: 16px;
}

.result-secondary {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 24px;
  text-align: center;
}

.result-secondary .result-label {
  font-size: 15px;
  font-weight: 600;
}

.result-secondary .result-value {
  font-size: 24px;
  font-weight: 700;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

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

.result-row-label {
  font-size: 14px;
  color: var(--color-gray-700);
}

.result-row-value {
  font-weight: 600;
  color: var(--color-black);
}

/* --- 10. Cards --- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 12px;
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-6);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(1, 87, 255, 0.1), rgba(1, 87, 255, 0.05));
  border-radius: 16px;
  transition: all var(--transition-normal);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, rgba(1, 87, 255, 0.15), rgba(1, 87, 255, 0.08));
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--color-gray-700);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.card a.card-link {
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.card a.card-link:hover {
  color: var(--color-primary-hover);
}

/* --- 11. Tabs --- */
.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--space-6);
  gap: 0;
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-4) var(--space-5);
  border: none;
  background: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-gray-700);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-black);
  border-bottom-color: var(--color-gray-300);
}

.tab-btn.active {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* --- 12. FAQ Accordion --- */
.accordion-item {
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.accordion-header {
  padding: var(--space-5) var(--space-5);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-black);
  cursor: pointer;
  background: var(--color-white);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: none;
  width: 100%;
  text-align: left;
  transition: all var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
}

.accordion-item.active .accordion-header {
  color: var(--color-primary);
}

.accordion-header i {
  font-size: 12px;
  transition: transform var(--transition-normal);
  color: var(--color-gray-500);
}

.accordion-item.active .accordion-header i {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: none;
  overflow: visible;
  transition: max-height var(--transition-normal);
}

.accordion-item.active .accordion-body {
  max-height: none;
}

.accordion-body-inner {
  padding: 0 var(--space-5) var(--space-4);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-900);
}

/* --- 13. Tables --- */

/* Definition Table (Symbol/Formula Tables) */
.definition-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
}

.definition-table thead th {
  text-align: left;
  font-weight: 700;
  font-size: 15px;
  color: #1A1A1A;
  padding: 12px 16px;
  border-bottom: 1px solid #E5E5E5;
  background: #FFFFFF;
}

.definition-table tbody tr {
  border-bottom: 1px solid #E5E5E5;
}

.definition-table tbody tr:nth-child(even) {
  background: #F7F7F7;
}

.definition-table tbody tr:nth-child(odd) {
  background: #FFFFFF;
}

.definition-table td {
  padding: 16px;
  vertical-align: top;
}

.definition-table td:first-child {
  font-weight: 700;
  font-size: 17px;
  color: #1A1A1A;
  width: 80px;
}

.definition-table td:last-child {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
}

/* Data Table (Amortization, Numeric Data) */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
}

.data-table thead th {
  text-align: left;
  font-weight: 700;
  font-size: 14px;
  color: #1A1A1A;
  padding: 12px 16px;
  border-bottom: 2px solid #E5E5E5;
  background: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table thead th:not(:first-child) {
  text-align: right;
}

.data-table tbody tr {
  border-bottom: 1px solid #E5E5E5;
}

.data-table tbody tr:nth-child(even) {
  background: #F7F7F7;
}

.data-table tbody tr:nth-child(odd) {
  background: #FFFFFF;
}

.data-table td {
  padding: 14px 16px;
  font-size: 16px;
  color: #2D2D2D;
  vertical-align: middle;
}

.data-table td:first-child {
  font-weight: 400;
  color: #1A1A1A;
}

.data-table td:not(:first-child) {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.data-table .table-total {
  font-weight: 700;
  background: #F0F0F0 !important;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* --- 14. Tool Page Layout --- */
.tool-hero {
  margin-bottom: var(--space-10);
  padding-top: var(--space-8);
  max-width: 800px;
}

.tool-hero h1 {
  margin-bottom: var(--space-3);
  font-size: 2.5rem;
  font-weight: 700;
  color: #1A1A1A;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.tool-description {
  font-size: 19px;
  line-height: 1.7;
  color: #555555;
  margin-bottom: 0;
}

/* Content Layout with TOC */
.content-wrapper {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 64px;
  max-width: 1200px;
  margin: 48px auto;
  padding: 0 24px;
}

@media (max-width: 55em) {
  .content-wrapper {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Table of Contents */
.table-of-contents {
  position: sticky;
  top: 112px;
  align-self: start;
}

@media (max-width: 55em) {
  .table-of-contents {
    position: static;
  }
}

.toc-header {
  font-size: 11px;
  font-weight: 700;
  color: #1A1A1A;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #E5E5E5;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list li {
  margin-bottom: 12px;
}

.toc-link {
  font-size: 15px;
  font-weight: 400;
  color: #555555;
  text-decoration: none;
  line-height: 1.6;
  display: block;
  transition: color var(--transition-fast);
}

.toc-link:hover,
.toc-link.active {
  color: #0157FF;
}

/* Main Content */
.main-content {
  max-width: 800px;
}

.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1A1A1A;
  margin-bottom: 20px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.content-section p {
  font-size: 18px;
  font-weight: 400;
  color: #2D2D2D;
  line-height: 1.7;
  margin-bottom: 20px;
}

.content-section p.intro {
  font-size: 19px;
  color: #555555;
  margin-bottom: 24px;
}

/* Numbered Lists - Bankrate Style */
.content-section ol {
  list-style: none;
  counter-reset: item;
  padding: 0;
  margin: 24px 0;
}

.content-section ol li {
  counter-increment: item;
  margin-bottom: 24px;
  padding-left: 0;
  position: relative;
  font-size: 18px;
  line-height: 1.7;
  color: #2D2D2D;
}

.content-section ol li::before {
  content: counter(item) ". ";
  font-size: 18px;
  font-weight: 700;
  color: #0157FF;
  margin-right: 8px;
}

.content-section ol li strong {
  font-weight: 700;
  color: #1A1A1A;
}

.content-section ol li a {
  color: #0157FF;
  text-decoration: underline;
  font-weight: 400;
}

.content-section ol li a:hover {
  color: #0044CC;
}

/* Regular unordered lists */
.content-section ul {
  padding-left: 24px;
  margin: 20px 0;
}

.content-section ul li {
  margin-bottom: 12px;
  line-height: 1.7;
  font-size: 18px;
  color: #2D2D2D;
}

.content-section-alt {
  background: var(--color-gray-50);
  padding: var(--space-10) 0;
  margin-left: calc(-1 * var(--space-6));
  margin-right: calc(-1 * var(--space-6));
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* --- 15. Copy Button --- */
.copy-btn {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: 6px;
  padding: var(--space-2) var(--space-3);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
  color: var(--color-gray-700);
}

.copy-btn:hover {
  background: var(--color-gray-50);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.copy-btn.copied {
  background: var(--color-result-bg);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- 16. Toast Notification --- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
}

.toast.success {
  background: var(--color-accent);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(20px); }
}

/* --- 17. Text Tool Styles --- */
.text-input-area {
  margin-bottom: var(--space-6);
}

.text-output-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.style-preview {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  padding: var(--space-4) var(--space-5);
  transition: all var(--transition-fast);
}

.style-preview:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.style-preview-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.style-preview-text {
  font-size: 18px;
  color: var(--color-black);
  word-break: break-all;
}

/* --- 18. Random Generator Styles --- */
.generator-output {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-10);
  text-align: center;
}

.generator-output .big-result {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.generator-output-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-2);
}

.generator-output-item {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  padding: var(--space-3);
  text-align: center;
  font-weight: 600;
  font-size: 18px;
}

/* --- 19. Wheel Styles --- */
.wheel-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.wheel-canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.wheel-pointer {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  z-index: 10;
}

/* --- 20. QR Code Styles --- */
.qr-preview {
  display: flex;
  justify-content: center;
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
}

/* --- 21. Symbol/Emoticon Grid --- */
.symbol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: var(--space-1);
}

.symbol-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.symbol-item:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: scale(1.1);
}

/* --- 22. Preset Buttons --- */
.preset-btns {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.preset-btn {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-gray-300);
  border-radius: 9999px;
  background: var(--color-white);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-btn:hover,
.preset-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* --- 23. Strength Meter --- */
.strength-meter {
  height: 8px;
  border-radius: 4px;
  background: var(--color-gray-200);
  margin-top: var(--space-2);
  overflow: hidden;
}

.strength-meter-fill {
  height: 100%;
  border-radius: 4px;
  transition: width var(--transition-normal), background var(--transition-normal);
}

.strength-meter-fill.weak { width: 20%; background: var(--color-error); }
.strength-meter-fill.fair { width: 40%; background: #FF9800; }
.strength-meter-fill.good { width: 60%; background: var(--color-warning); }
.strength-meter-fill.strong { width: 80%; background: #8BC34A; }
.strength-meter-fill.very-strong { width: 100%; background: var(--color-accent); }

/* --- 24. Timer Styles --- */
.timer-display {
  font-size: 4rem;
  font-weight: 700;
  text-align: center;
  font-family: var(--font-mono);
  color: var(--color-black);
  letter-spacing: 2px;
}

.timer-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* --- 25. Related Tools Section --- */
.related-tools {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-200);
}

.related-tools h2 {
  margin-bottom: var(--space-6);
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

@media (max-width: 40em) {
  .related-tools-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.related-tool-card {
  display: block;
  padding: var(--space-5);
  border: 1px solid var(--color-gray-200);
  border-radius: 8px;
  text-decoration: none;
  background: var(--color-white);
  transition: all var(--transition-normal);
}

.related-tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  text-decoration: none;
}

.related-tool-card h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-black);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.related-tool-card h4 i {
  color: var(--color-primary);
  font-size: 18px;
}

.related-tool-card:hover h4 {
  color: var(--color-primary);
}

.related-tool-card p {
  font-size: 14px;
  color: var(--color-gray-700);
  line-height: 1.6;
  margin: 0;
}

/* --- 26. Slider/Range Input --- */
input[type="range"] {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--color-gray-200);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-white);
  box-shadow: var(--shadow-sm);
}

/* --- 27. Responsive Utilities --- */
@media (max-width: 30em) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.375rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  .calculator {
    padding: var(--space-5);
  }

  .calculator-inputs,
  .calculator-results {
    padding: var(--space-6) var(--space-5);
  }

  .tool-hero {
    padding-top: var(--space-4);
  }

  .timer-display {
    font-size: 2.5rem;
  }

  .generator-output .big-result {
    font-size: 2.5rem;
  }

  .result-value {
    font-size: 36px;
  }

  .card {
    padding: var(--space-5);
  }
}

@media (max-width: 40em) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    padding: var(--space-10) 0 var(--space-8);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

/* --- 28. Animations --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  animation: fadeIn 0.6s ease-out;
}

.category-grid > *,
.related-tools-grid > * {
  animation: fadeInUp 0.5s ease-out backwards;
}

.category-grid > *:nth-child(1) { animation-delay: 0.1s; }
.category-grid > *:nth-child(2) { animation-delay: 0.2s; }
.category-grid > *:nth-child(3) { animation-delay: 0.3s; }
.category-grid > *:nth-child(4) { animation-delay: 0.4s; }
.category-grid > *:nth-child(5) { animation-delay: 0.5s; }

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

  .hero,
  .category-grid > *,
  .related-tools-grid > * {
    animation: none !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

button:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-accent:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- 29. Homepage --- */
.hero {
  text-align: center;
  padding: var(--space-16) 0 var(--space-12);
  background: linear-gradient(to bottom, var(--color-gray-50), var(--color-white));
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
  color: var(--color-black);
}

.hero p {
  font-size: 1.1875rem;
  color: var(--color-gray-700);
  line-height: 1.7;
  max-width: 680px;
  margin: 0 auto var(--space-8);
}

@media (max-width: 40em) {
  .hero h1 {
    font-size: 2rem;
  }
  .hero p {
    font-size: 1rem;
  }
}

/* Featured categories section */
.featured-categories {
  margin-bottom: var(--space-12);
  padding: var(--space-8) 0;
  background: linear-gradient(to bottom, var(--color-white), #F7F7F7);
}

.featured-categories h2 {
  text-align: center;
  margin-bottom: var(--space-8);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-black);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.featured-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-8);
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: 16px;
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.featured-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.featured-card:hover::before {
  opacity: 1;
}

.featured-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(1, 87, 255, 0.12), rgba(1, 87, 255, 0.06));
  border-radius: 20px;
  transition: all var(--transition-normal);
}

.featured-card:hover .featured-icon {
  transform: scale(1.1) rotate(-5deg);
  background: linear-gradient(135deg, rgba(1, 87, 255, 0.18), rgba(1, 87, 255, 0.10));
}

.featured-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-3);
}

.featured-card p {
  font-size: 15px;
  color: var(--color-gray-700);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.featured-count {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.featured-link {
  font-weight: 600;
  font-size: 15px;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: gap var(--transition-fast);
}

.featured-card:hover .featured-link {
  gap: var(--space-3);
}

@media (max-width: 40em) {
  .featured-grid {
    grid-template-columns: 1fr;
  }

  .featured-categories h2 {
    font-size: 1.5rem;
  }
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

@media (max-width: 40em) {
  .category-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.popular-tools {
  margin-bottom: var(--space-12);
  padding-top: var(--space-8);
}

.popular-tools h2 {
  text-align: center;
  margin-bottom: var(--space-8);
  font-size: 2rem;
  font-weight: 700;
  position: relative;
  display: inline-block;
  width: 100%;
}

.popular-tools h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.content-section {
  padding: var(--space-8) 0;
}

.content-section:first-child {
  padding-top: 0;
}