/* ============================================================
   CalculatorsDaily — Global Design System
   Domain: calculatorsdaily.com
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Nunito:wght@400;600;700&family=Roboto+Mono:wght@400;600;700&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Color Palette */
  --color-primary:    #1A73E8;
  --color-secondary:  #0D47A1;
  --color-accent:     #34A853;
  --color-highlight:  #FBBC04;
  --color-bg:         #F8F9FA;
  --color-surface:    #FFFFFF;
  --color-text:       #202124;
  --color-muted:      #5F6368;
  --color-error:      #EA4335;

  /* Extended Palette */
  --color-primary-light: #E8F0FE;
  --color-primary-dark:  #1557B0;
  --color-accent-light:  #E6F4EA;
  --color-accent-dark:   #1E8E3E;
  --color-highlight-light: #FEF7E0;
  --color-error-light:   #FCE8E6;
  --color-border:        #DADCE0;
  --color-border-light:  #E8EAED;

  /* Typography */
  --font-display: 'Nunito', 'Segoe UI', sans-serif;
  --font-body:    'Inter', 'Segoe UI', sans-serif;
  --font-mono:    'Roboto Mono', 'Consolas', monospace;

  /* Spacing */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm:   0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md:   0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg:   0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl:   0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px rgba(60,64,67,0.15), 0 4px 8px rgba(60,64,67,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Container */
  --container-max: 1200px;
  --container-narrow: 800px;
}

/* ── Base Reset ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

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

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

h1 { font-size: 2.25rem; margin-bottom: var(--space-md); }
h2 { font-size: 1.75rem; margin-bottom: var(--space-md); }
h3 { font-size: 1.375rem; margin-bottom: var(--space-sm); }
h4 { font-size: 1.125rem; margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.text-muted { color: var(--color-muted); }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-error { color: var(--color-error); }
.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); }

/* ── Layout Utilities ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.section-alt {
  background: var(--color-surface);
}

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ── Grid Layouts ── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

/* ════════════════════════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════════════════════════ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-brand:hover {
  color: var(--color-primary);
}

.navbar-brand svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-links a {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

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

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: absolute;
    top: 64px;
    right: 16px;
    width: 250px;
    max-height: 60vh;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border-radius: var(--radius-lg);
    padding: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    z-index: 1001;
}

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

.mobile-nav::before {
    content: "\f077";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    display: block;
    position: sticky;
    top: 0;
    background: var(--color-surface);
    text-align: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border-light);
    z-index: 10;
    color: var(--color-muted);
}

.mobile-nav::after {
    content: "\f078";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    display: block;
    position: sticky;
    bottom: 0;
    background: var(--color-surface);
    text-align: center;
    padding: 12px 0;
    border-top: 1px solid var(--color-border-light);
    z-index: 10;
    color: var(--color-muted);
}

.mobile-nav a {
    display: block;
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}


/* ════════════════════════════════════════════════════════════
   HERO SECTION
   ════════════════════════════════════════════════════════════ */

.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  padding: var(--space-3xl) 0 calc(var(--space-3xl) + 16px);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.75rem;
  color: white;
  margin-bottom: var(--space-md);
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.92;
  margin-bottom: var(--space-xl);
  font-weight: 400;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ════════════════════════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.5);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: white;
  color: white;
}

.btn-cta {
  background: var(--color-highlight);
  color: var(--color-text);
  border-color: var(--color-highlight);
}

.btn-cta:hover {
  background: #E8A800;
  border-color: #E8A800;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

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

.btn-blue {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-blue:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-grey {
  background: var(--color-bg);
  color: var(--color-muted);
  border-color: var(--color-border);
}

.btn-grey:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ════════════════════════════════════════════════════════════
   TOOL CARDS (Homepage Grid)
   ════════════════════════════════════════════════════════════ */

.tool-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.tool-card.disabled {
  opacity: 0.55;
  pointer-events: none;
}

.tool-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.tool-card-icon.blue   { background: var(--color-primary-light); color: var(--color-primary); }
.tool-card-icon.green  { background: var(--color-accent-light);  color: var(--color-accent); }
.tool-card-icon.amber  { background: var(--color-highlight-light); color: #E8A800; }
.tool-card-icon.red    { background: var(--color-error-light);   color: var(--color-error); }

.tool-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.tool-card p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  flex: 1;
  margin-bottom: var(--space-md);
}

.tool-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary);
}

.tool-card-link:hover {
  gap: 10px;
}


/* ════════════════════════════════════════════════════════════
   FEATURES SECTION
   ════════════════════════════════════════════════════════════ */

.feature-card {
  text-align: center;
  padding: var(--space-xl);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: block;
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}


/* ════════════════════════════════════════════════════════════
   CALCULATOR CARD (used on all tool pages)
   ════════════════════════════════════════════════════════════ */

.calc-page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-xl);
  align-items: start;
}

.calc-main {
  min-width: 0;
}

.calc-sidebar {
  position: sticky;
  top: 88px;
}

.calc-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--color-border-light);
}

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

.calc-header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.calc-header .calc-subtitle {
  color: var(--color-muted);
  font-size: 1rem;
  font-weight: 400;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.breadcrumb a {
  color: var(--color-muted);
}

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

.breadcrumb .separator {
  color: var(--color-border);
}


/* ── Calculator Tabs ── */
.calc-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border-light);
  margin-bottom: var(--space-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

.calc-tabs::-webkit-scrollbar {
  display: none; /* Chrome/Safari/Webkit */
}

.calc-tab {
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.calc-tab:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.calc-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.calc-tab-content {
  display: none;
}

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


/* ── Calculator Inputs ── */
.calc-form-group {
  margin-bottom: var(--space-lg);
}

.calc-label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.calc-label .label-hint {
  font-weight: 400;
  color: var(--color-muted);
  font-size: 0.8125rem;
}

.calc-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 1.0625rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.calc-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.calc-input::placeholder {
  color: var(--color-border);
}

.calc-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(234, 67, 53, 0.1);
}

.calc-input:disabled {
  background: var(--color-bg);
  color: var(--color-muted);
  cursor: not-allowed;
}

.calc-input-row {
  display: flex;
  gap: var(--space-md);
  align-items: flex-end;
}

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

.input-with-unit {
  position: relative;
}

.input-unit {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-muted);
  font-size: 0.875rem;
  font-weight: 600;
  pointer-events: none;
}

.calc-input.has-unit {
  padding-right: 52px;
}

/* Select dropdown */
.calc-select {
  width: 100%;
  padding: 14px 40px 14px 16px;
  font-size: 1.0625rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235F6368' stroke-width='2' fill='none'/%3E%3C/svg%3E") no-repeat right 16px center;
  color: var(--color-text);
  appearance: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.calc-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

/* Unit Toggle */
.unit-toggle {
  display: inline-flex;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.unit-toggle button {
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  background: var(--color-surface);
  color: var(--color-muted);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.unit-toggle button.active {
  background: var(--color-primary);
  color: white;
}

.unit-toggle button:not(.active):hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ── Calculator Buttons ── */
.calc-buttons {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}


/* ── Calculator Results ── */
.calc-result {
  display: none;
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(52, 168, 83, 0.2);
}

.calc-result.show {
  display: block;
  animation: fadeInUp 0.3s ease;
}

.calc-result-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-sm);
}

.calc-result-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-sm);
  word-break: break-word;
}

.calc-result-formula {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-muted);
  background: rgba(255,255,255,0.7);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  margin-top: var(--space-sm);
  overflow-x: auto;
}

.calc-result-details {
  margin-top: var(--space-md);
}

.calc-result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(52, 168, 83, 0.15);
  font-size: 0.9375rem;
}

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

.calc-result-row .label {
  color: var(--color-muted);
}

.calc-result-row .value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-text);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(26, 115, 232, 0.08);
  border: 1px solid rgba(26, 115, 232, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-sm);
}

.copy-btn:hover {
  background: rgba(26, 115, 232, 0.15);
}

.copy-btn.copied {
  color: var(--color-accent);
  background: rgba(52, 168, 83, 0.1);
  border-color: rgba(52, 168, 83, 0.2);
}


/* ── Result Color Variants ── */
.calc-result.amber {
  background: var(--color-highlight-light);
  border-color: rgba(251, 188, 4, 0.3);
}

.calc-result.amber .calc-result-label,
.calc-result.amber .calc-result-value {
  color: #B06000;
}

.calc-result.red {
  background: var(--color-error-light);
  border-color: rgba(234, 67, 53, 0.2);
}

.calc-result.red .calc-result-label,
.calc-result.red .calc-result-value {
  color: var(--color-error);
}


/* ════════════════════════════════════════════════════════════
   BMI SCALE BAR
   ════════════════════════════════════════════════════════════ */

.bmi-scale {
  position: relative;
  width: 100%;
  height: 28px;
  border-radius: 14px;
  background: linear-gradient(to right,
    #FBBC04 0%,      /* Underweight */
    #FBBC04 21.25%,
    #34A853 21.25%,  /* Normal */
    #34A853 37.5%,
    #FF9800 37.5%,   /* Overweight */
    #FF9800 50%,
    #EA4335 50%,     /* Obese I */
    #EA4335 62.5%,
    #C62828 62.5%,   /* Obese II */
    #C62828 75%,
    #7f0000 75%,     /* Obese III */
    #7f0000 100%
  );
  margin: var(--space-lg) 0;
  overflow: visible;
}

.bmi-needle {
  position: absolute;
  top: -6px;
  width: 4px;
  height: 40px;
  background: var(--color-text);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: left 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.bmi-needle::after {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: var(--color-text);
  border-radius: 50%;
}

.bmi-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: var(--space-xs);
}


/* ════════════════════════════════════════════════════════════
   DISCLAIMER / INFO BANNERS
   ════════════════════════════════════════════════════════════ */

.info-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

.info-banner.info {
  background: var(--color-primary-light);
  border: 1px solid rgba(26, 115, 232, 0.2);
  color: var(--color-primary-dark);
}

.info-banner.warning {
  background: var(--color-highlight-light);
  border: 1px solid rgba(251, 188, 4, 0.3);
  color: #7A5900;
}

.info-banner.error {
  background: var(--color-error-light);
  border: 1px solid rgba(234, 67, 53, 0.2);
  color: var(--color-error);
}

.info-banner i {
  margin-top: 2px;
  flex-shrink: 0;
}

.disclaimer-box {
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: var(--space-xl) 0;
}

.disclaimer-box h4 {
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}


/* ════════════════════════════════════════════════════════════
   SEO CONTENT SECTION
   ════════════════════════════════════════════════════════════ */

.seo-content {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--color-border-light);
  line-height: 1.8;
}

.seo-content h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-light);
}

.seo-content h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-secondary);
}

.seo-content p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.seo-content ul,
.seo-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.seo-content li {
  margin-bottom: var(--space-sm);
  list-style: disc;
}

.seo-content ol li {
  list-style: decimal;
}

.seo-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.9375rem;
}

.seo-content th,
.seo-content td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.seo-content th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-display);
}

.seo-content tr:hover td {
  background: var(--color-primary-light);
}

.seo-content strong {
  font-weight: 600;
}

.seo-content code {
  font-family: var(--font-mono);
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}


/* ════════════════════════════════════════════════════════════
   FAQ ACCORDION
   ════════════════════════════════════════════════════════════ */

.faq-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--color-border-light);
}

.faq-section h2 {
  margin-bottom: var(--space-lg);
}

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  background: var(--color-surface);
  transition: box-shadow var(--transition-fast);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  gap: var(--space-md);
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-bg);
}

.faq-question i {
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--color-primary);
  font-size: 0.875rem;
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-muted);
  line-height: 1.7;
  font-size: 0.9375rem;
}


/* ════════════════════════════════════════════════════════════
   TESTIMONIAL CARDS
   ════════════════════════════════════════════════════════════ */

.testimonial-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  font-family: Georgia, serif;
  font-size: 4rem;
  color: var(--color-primary-light);
  position: absolute;
  top: 8px;
  left: 20px;
  line-height: 1;
}

.testimonial-text {
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  font-size: 0.9375rem;
  line-height: 1.7;
  padding-top: var(--space-lg);
}

.testimonial-author {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-primary);
}

.testimonial-role {
  font-size: 0.8125rem;
  color: var(--color-muted);
}


/* ════════════════════════════════════════════════════════════
   RELATED CALCULATORS
   ════════════════════════════════════════════════════════════ */

.related-tools {
  background: var(--color-bg);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  margin-top: var(--space-xl);
}

.related-tools h3 {
  margin-bottom: var(--space-md);
}

.related-tool-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: 0.9375rem;
}

.related-tool-link:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.related-tool-link i {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.875rem;
  flex-shrink: 0;
}


/* ════════════════════════════════════════════════════════════
   AD PLACEHOLDERS
   ════════════════════════════════════════════════════════════ */

.ad-placeholder {
  min-height: 90px;
  background: #f1f3f4;
  text-align: center;
  padding: 10px;
  margin: 16px 0;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-border);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px dashed var(--color-border);
}

.ad-placeholder.sidebar-ad {
  min-height: 250px;
}

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


/* ════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════ */

.footer {
  background: var(--color-secondary);
  color: white;
  padding: var(--space-3xl) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.footer h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 700;
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
  color: white;
}


/* ════════════════════════════════════════════════════════════
   LEGAL / TRUST PAGES
   ════════════════════════════════════════════════════════════ */

.legal-page {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

.legal-page h1 {
  margin-bottom: var(--space-xs);
}

.legal-page .last-updated {
  color: var(--color-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-2xl);
}

.legal-page h2 {
  margin-top: var(--space-2xl);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-light);
}

.legal-page h3 {
  margin-top: var(--space-xl);
}

.legal-page p,
.legal-page li {
  color: var(--color-muted);
  line-height: 1.8;
}

.legal-page ul {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.legal-page li {
  list-style: disc;
  margin-bottom: var(--space-sm);
}


/* ════════════════════════════════════════════════════════════
   CONTACT FORM
   ════════════════════════════════════════════════════════════ */

.contact-form {
  max-width: 600px;
}

.contact-form .calc-form-group {
  margin-bottom: var(--space-lg);
}

.contact-form textarea.calc-input {
  min-height: 150px;
  resize: vertical;
}


/* ════════════════════════════════════════════════════════════
   404 PAGE
   ════════════════════════════════════════════════════════════ */

.error-page {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.error-code {
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.error-page h1 {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
}

.error-page p {
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}


/* ════════════════════════════════════════════════════════════
   BIRTHDAY CAKE ANIMATION (Age Calculator)
   ════════════════════════════════════════════════════════════ */

@keyframes cakeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes candleFlicker {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.7; transform: scaleY(0.9); }
}

.birthday-anim {
  display: none;
  text-align: center;
  font-size: 2.5rem;
  animation: cakeFloat 2s ease-in-out infinite;
  margin-bottom: var(--space-md);
}

.birthday-anim.show {
  display: block;
}

/* ════════════════════════════════════════════════════════════
   WORLD CLOCK TABLE (Timezone page)
   ════════════════════════════════════════════════════════════ */

.world-clock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.world-clock-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: box-shadow var(--transition-fast);
}

.world-clock-card:hover {
  box-shadow: var(--shadow-sm);
}

.world-clock-city {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.world-clock-time {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.world-clock-date {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 2px;
}

/* Swap button */
.swap-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  cursor: pointer;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-body);
  margin: var(--space-sm) auto;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.swap-btn i {
  font-size: 0.875rem;
  transition: transform var(--transition-fast);
}

.swap-btn:hover i {
  transform: rotate(180deg);
}


/* ════════════════════════════════════════════════════════════
   P&L STATEMENT (Margin Calculator)
   ════════════════════════════════════════════════════════════ */

.pnl-table {
  width: 100%;
  margin-top: var(--space-md);
  font-size: 0.9375rem;
}

.pnl-table tr {
  border-bottom: 1px solid rgba(52, 168, 83, 0.15);
}

.pnl-table td {
  padding: var(--space-sm) 0;
}

.pnl-table td:last-child {
  text-align: right;
  font-family: var(--font-mono);
  font-weight: 600;
}

.pnl-table .total-row {
  font-weight: 700;
  border-top: 2px solid var(--color-accent);
  border-bottom: none;
}

.pnl-table .total-row td {
  padding-top: var(--space-md);
}


/* ════════════════════════════════════════════════════════════
   ANIMATIONS
   ════════════════════════════════════════════════════════════ */

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.4s ease;
}


/* ════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ════════════════════════════════════════════════════════════ */

/* Tablet and below */
@media (max-width: 1024px) {
  .calc-page-layout {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .calc-main {
    display: contents;
  }

  /* 1. Calculator card stays at the top */
  .calc-card {
    order: 0;
    min-width: 0;
    max-width: 100%;
  }

  /* 2. First ad goes below calculator */
  .calc-card + .ad-placeholder {
    order: 1;
  }

  /* 3. Related tools sidebar goes below calculator/first ad */
  .calc-sidebar {
    position: static;
    order: 2;
    width: 100%;
    margin-bottom: var(--space-xl);
    min-width: 0;
    max-width: 100%;
  }

  /* 4. Guide (SEO content) and everything after it goes below the sidebar */
  .seo-content,
  .seo-content ~ * {
    order: 3;
    min-width: 0;
    max-width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile hamburger breakpoint */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.0625rem;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  h3 { font-size: 1.125rem; }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-tools {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .calc-tabs {
    gap: 0;
  }

  .calc-tab {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
  }

  /* Keep Day/Month/Year rows horizontal on mobile — they fit fine as 3 items */
  .calc-input-row {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  /* Only stack when items need full width (e.g. Percentage/Number side-by-side inputs) */
  .calc-input-row--stack {
    flex-direction: column;
    align-items: stretch;
  }

  .calc-input-row .calc-form-group {
    flex: 1;
    min-width: 0;
    margin-bottom: var(--space-xs);
  }

  /* Proper select sizing on mobile */
  .calc-select {
    padding: 12px 36px 12px 12px;
    font-size: 0.9375rem;
    background-position: right 10px center;
  }

  /* Ensure labels and text left-align on mobile for professional look */
  .calc-label {
    text-align: left;
  }

  .label-hint {
    font-size: 0.75rem;
    text-align: left;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .section {
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
  }

  .calc-card,
  .seo-content,
  .faq-section {
    padding: var(--space-lg);
  }

  .calc-result-value {
    font-size: 1.375rem;
  }

  .error-code {
    font-size: 5rem;
  }

  /* SEO content alignment - left aligned for readability */
  .seo-content {
    text-align: left;
  }

  .seo-content p,
  .seo-content li {
    text-align: left;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* Hide Ad placeholders completely on mobile */
  .ad-placeholder {
    display: none !important;
  }

  /* Timezone specific: Keep time/date/tz row usable */
  .calc-form-group[style*="flex:1.5"] {
    flex: 1 1 100% !important;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .hero {
    padding: var(--space-2xl) 0;
  }

  .hero h1 {
    font-size: 1.625rem;
  }

  .calc-card,
  .seo-content,
  .faq-section {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9375rem;
  }

  .ad-placeholder.leaderboard {
    min-height: 50px;
  }

  /* Age/date dropdowns: keep in row but tighter */
  .calc-input-row {
    gap: var(--space-xs);
  }

  .calc-select {
    padding: 10px 30px 10px 10px;
    font-size: 0.875rem;
    background-position: right 8px center;
  }

  .calc-label.label-hint,
  .label-hint {
    font-size: 0.6875rem;
  }

  .calc-form-group {
    margin-bottom: var(--space-md);
  }

  /* Tabs scroll smoothly (CSS moved to global) */
}

/* Print styles */
@media print {
  .navbar, .footer, .ad-placeholder, .hamburger, .mobile-nav {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  .calc-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* === NAVBAR SLIDER STYLES === */
.nav-slider-container {
  display: flex;
  align-items: center;
  position: relative;
  flex: 1;
  max-width: 800px;
  margin: 0 20px;
}
.nav-links {
  display: flex;
  overflow-x: auto;
  scroll-behavior: smooth;
  -ms-overflow-style: none;
  scrollbar-width: none;
  gap: 16px;
  padding: 5px 0;
  flex-wrap: nowrap !important;
}
.nav-links::-webkit-scrollbar {
  display: none;
}
.nav-links a {
  white-space: nowrap;
  flex-shrink: 0;
}
.slider-arrow {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  color: var(--color-text);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: all 0.2s;
  flex-shrink: 0;
}
.slider-arrow:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.slider-arrow.left {
  margin-right: 10px;
}
.slider-arrow.right {
  margin-left: 10px;
}

/* Ensure mobile nav wraps properly */
@media (max-width: 768px) {
  .nav-slider-container {
    display: none; /* Hide desktop slider on mobile */
  }
}

/* Footer tools column */
.footer-links.footer-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
}


/* Hide mobile nav explicitly on desktop */
@media (min-width: 769px) {
  .mobile-nav {
    display: none !important;
  }
}


/* Fix grid layout when breadcrumb and leaderboard are inside calc-page-layout */
.calc-page-layout > .breadcrumb { grid-column: 1 / -1; }
.calc-page-layout > .leaderboard { grid-column: 1 / -1; }