/* =====================================================
   GramToMol — Global Design System
   Light Theme | Chemistry Calculator Website
   ===================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800&display=swap');

/* --- CSS Variables / Tokens --- */
:root {
  /* Colors */
  --color-primary:       #1B5E8E;
  --color-primary-dark:  #134070;
  --color-primary-light: #2E80BE;
  --color-secondary:     #00B8A0;
  --color-secondary-dark:#009B86;
  --color-accent:        #F5A623;
  --color-accent-light:  #FFC355;

  --color-bg:            #F7F9FC;
  --color-surface:       #FFFFFF;
  --color-surface-alt:   #EEF4FA;
  --color-border:        #D1DFE9;
  --color-border-light:  #E8F0F7;

  --color-text:          #1A2A3A;
  --color-text-muted:    #5A7082;
  --color-text-light:    #8BA4B8;
  --color-text-inverse:  #FFFFFF;

  --color-success:       #22C55E;
  --color-error:         #EF4444;
  --color-warning:       #F59E0B;

  --color-hero-gradient-from: #EBF4FC;
  --color-hero-gradient-to:   #F7F9FC;

  /* Typography */
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-display: 'Outfit', system-ui, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Spacing */
  --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;

  /* Radii */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(27,94,142,0.06);
  --shadow-sm: 0 2px 8px rgba(27,94,142,0.08);
  --shadow-md: 0 4px 16px rgba(27,94,142,0.12);
  --shadow-lg: 0 8px 32px rgba(27,94,142,0.16);
  --shadow-xl: 0 16px 48px rgba(27,94,142,0.20);

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

  /* Layout */
  --container-max: 1200px;
  --container-2xl: 1440px;
  --header-h:      70px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.625rem); }
h4 { font-size: var(--text-xl); }

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

ul, ol { padding-left: var(--space-6); }
li { margin-bottom: var(--space-2); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
}
.btn-secondary:hover {
  background: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}
.btn-ghost:hover {
  color: var(--color-primary-dark);
  background: var(--color-surface-alt);
}

.btn-lg { padding: 1rem 2.25rem; font-size: var(--text-lg); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: var(--text-sm); }

/* --- Form Elements --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27,94,142,0.12);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--color-text-light);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235A7082' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-textarea { resize: vertical; min-height: 140px; }

/* --- Card --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.card-body { padding: var(--space-6); }

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-primary { background: rgba(27,94,142,0.12); color: var(--color-primary); }
.badge-secondary { background: rgba(0,184,160,0.12); color: var(--color-secondary-dark); }
.badge-accent { background: rgba(245,166,35,0.15); color: #B87A00; }

/* --- Section Spacing --- */
.section { padding: var(--space-20) 0; }
.section-sm { padding: var(--space-12) 0; }
.section-lg { padding: var(--space-24) 0; }

.section-header { text-align: center; max-width: 680px; margin: 0 auto var(--space-12); }
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-secondary-dark);
  margin-bottom: var(--space-3);
}
.section-title { margin-bottom: var(--space-4); }
.section-desc { color: var(--color-text-muted); font-size: var(--text-lg); }

/* --- Divider --- */
.divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  border: none;
  margin: var(--space-8) 0;
}

/* =====================================================
   HEADER
   ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xs);
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.site-logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.site-logo-text span { color: var(--color-secondary); }

/* Desktop Nav */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-desktop li a {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-desktop li a:hover,
.nav-desktop li a.active {
  color: var(--color-primary);
  background: var(--color-surface-alt);
}

/* Header CTA */
.header-cta { display: flex; align-items: center; gap: var(--space-3); }

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background var(--transition-fast);
}
.mobile-menu-btn:hover { background: var(--color-surface-alt); }

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26,42,58,0.5);
  z-index: 300;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav-overlay.is-open {
  display: block;
  opacity: 1;
}

.mobile-nav-panel {
  position: absolute;
  top: 0; right: 0;
  width: min(320px, 90vw);
  height: 100%;
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  overflow-y: auto;
}

.mobile-nav-overlay.is-open .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}
.mobile-nav-close:hover { background: var(--color-surface-alt); color: var(--color-text); }

.mobile-nav-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-links a {
  display: block;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-lg);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.mobile-nav-links a:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

/* =====================================================
   SAND-ESTIMATOR DARK FOOTER (PIXEL-PERFECT MATCH)
   ===================================================== */
.site-footer {
  background: #0B0F19;
  color: #94A3B8;
  padding: 4.5rem 0 2.5rem;
  font-family: var(--font-body);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.8fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Brand Column */
.footer-brand .site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  margin-bottom: 1.25rem;
}

.footer-brand .site-logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.375rem;
  color: #FFFFFF;
}

.footer-brand .site-logo-text span {
  color: #0EA5E9;
}

.footer-desc {
  color: #94A3B8;
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  max-width: 320px;
}

/* Social Icon Pills */
.footer-socials {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94A3B8;
  text-decoration: none;
  transition: all 0.2s ease;
}

.footer-social-btn:hover {
  background: rgba(14, 165, 233, 0.15);
  border-color: rgba(14, 165, 233, 0.4);
  color: #38BDF8;
  transform: translateY(-2px);
}

/* Column Headings */
.footer-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: #FFFFFF;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

/* Links List */
.footer-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.footer-links-list a {
  color: #94A3B8;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: #FFFFFF;
}

/* Contact Info */
.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: #94A3B8;
  font-size: 0.9375rem;
}

.footer-contact-item svg {
  color: #0EA5E9;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-item a {
  color: #94A3B8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-contact-item a:hover {
  color: #FFFFFF;
}

/* Language Selector Grid */
.footer-lang-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  max-width: 280px;
}

.lang-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: #94A3B8;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.2s ease;
}

.lang-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.2);
}

.lang-pill.active {
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid #0EA5E9;
  color: #38BDF8;
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.25);
}

/* Footer Bottom Bar */
.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: #64748B;
}

.footer-bottom-bar p {
  margin: 0;
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
  background: linear-gradient(135deg, var(--color-hero-gradient-from) 0%, #F0F8FF 50%, var(--color-hero-gradient-to) 100%);
  padding: var(--space-20) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,184,160,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(27,94,142,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(0,184,160,0.1);
  border: 1px solid rgba(0,184,160,0.25);
  border-radius: var(--radius-full);
  padding: 0.375rem 1rem;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-secondary-dark);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.hero-title {
  margin-bottom: var(--space-5);
  color: var(--color-text);
}

.hero-title .highlight {
  color: var(--color-primary);
  position: relative;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
}

.hero-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
}

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

.hero-stat-value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.hero-stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* =====================================================
   TOOL CALCULATOR SECTION
   ===================================================== */
.tool-section {
  padding: var(--space-16) 0;
  background: var(--color-surface-alt);
}

.tool-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  max-width: 860px;
  margin: 0 auto;
}

.tool-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--space-6) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.tool-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: white;
  margin: 0;
}

.tool-tabs {
  display: flex;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 3px;
}

.tool-tab {
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  border: none;
  background: transparent;
  transition: all var(--transition-fast);
}

.tool-tab.active {
  background: white;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.tool-body { padding: var(--space-8); }

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.tool-result {
  background: linear-gradient(135deg, var(--color-surface-alt), #E8F4F8);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.tool-result.has-result {
  border-color: var(--color-secondary);
  background: linear-gradient(135deg, rgba(0,184,160,0.05), rgba(0,184,160,0.02));
}

.tool-result-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.tool-result-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  transition: all var(--transition-base);
}

.tool-result-unit {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: var(--space-1);
}

.tool-result-formula {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: var(--space-3);
  font-style: italic;
}

.tool-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.tool-steps {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-light);
}

.tool-steps-title {
  font-weight: 700;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.step-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.step-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.step-number {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =====================================================
   FEATURES / HOW IT WORKS
   ===================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  background: var(--color-surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.5rem;
  transition: background var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.feature-card:hover .feature-icon svg { color: white; }

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

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* =====================================================
   DATA TABLE SECTION
   ===================================================== */
.data-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  background: var(--color-surface);
}

.data-table thead {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
}

.data-table th {
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-table td {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.data-table tbody tr:last-child td { border-bottom: none; }

.data-table tbody tr {
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover { background: var(--color-surface-alt); }

.data-table tbody tr:nth-child(even) {
  background: rgba(238,244,250,0.5);
}
.data-table tbody tr:nth-child(even):hover { background: var(--color-surface-alt); }

/* =====================================================
   FAQ SECTION
   ===================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color var(--transition-fast);
}

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

.faq-item[open] .faq-question { color: var(--color-primary); }

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition-base);
}

.faq-item[open] .faq-icon {
  background: var(--color-primary);
  color: white;
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: var(--text-base);
}

/* =====================================================
   TOOLS GRID (tools.html)
   ===================================================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}

.tool-grid-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
  overflow: hidden;
}

.tool-grid-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.tool-grid-card:hover::after { transform: scaleX(1); }

.tool-grid-icon {
  font-size: 2.25rem;
  line-height: 1;
}

.tool-grid-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.tool-grid-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  flex-grow: 1;
}

.tool-grid-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

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

/* =====================================================
   BLOG
   ===================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.blog-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-surface-alt);
}

.blog-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card-img img { transform: scale(1.06); }

.blog-card-body {
  padding: var(--space-6);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.blog-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
  flex-grow: 1;
  display: block;
}

.blog-card-title:hover { color: var(--color-primary); }

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

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
  flex-wrap: wrap;
}

.page-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 0.875rem;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Single Blog */
.blog-hero {
  padding: var(--space-16) 0 0;
  background: linear-gradient(180deg, var(--color-hero-gradient-from), var(--color-surface));
}

.blog-hero-img {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin-top: var(--space-8);
  box-shadow: var(--shadow-xl);
}

.blog-hero-img img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
}

.blog-content {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--space-12) 0;
}

.blog-content h2, .blog-content h3, .blog-content h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.blog-content p { color: var(--color-text-muted); margin-bottom: var(--space-5); }
.blog-content ul, .blog-content ol { margin-bottom: var(--space-5); color: var(--color-text-muted); }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-text-light); }

/* =====================================================
   CONTACT PAGE
   ===================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border-light);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.contact-info-item:last-child { border-bottom: none; padding-bottom: 0; }
.contact-info-item:first-child { padding-top: 0; }

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

.contact-info-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.contact-info-value {
  font-weight: 600;
  color: var(--color-text);
}

.contact-form-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-md);
}

.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

.form-status {
  display: none;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
}

.form-status.success {
  display: block;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.3);
  color: #16a34a;
}

.form-status.error {
  display: block;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #dc2626;
}

/* =====================================================
   ABOUT PAGE
   ===================================================== */
.about-hero-img {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  margin-top: var(--space-8);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-6);
}

.team-card {
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.team-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.team-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  object-fit: cover;
  border: 3px solid var(--color-secondary);
}

.team-name {
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.team-role {
  font-size: var(--text-sm);
  color: var(--color-secondary-dark);
  font-weight: 600;
}

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  border: 1px solid var(--color-border-light);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* =====================================================
   PAGE HERO (generic)
   ===================================================== */
.page-hero {
  background: linear-gradient(135deg, var(--color-hero-gradient-from), var(--color-surface-alt));
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
}

.page-hero-badge { margin-bottom: var(--space-4); }
.page-hero h1 { margin-bottom: var(--space-4); }
.page-hero-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* =====================================================
   LEGAL PAGES
   ===================================================== */
.legal-content {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--space-12) 0 var(--space-20);
}

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border-light);
}

.legal-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.legal-content p, .legal-content li {
  color: var(--color-text-muted);
}

/* =====================================================
   SITEMAP PAGE
   ===================================================== */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-8);
}

.sitemap-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-secondary-dark);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-secondary);
  display: inline-block;
}

.sitemap-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.sitemap-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

/* =====================================================
   404 PAGE
   ===================================================== */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-h) - 200px);
  text-align: center;
  padding: var(--space-20) var(--space-6);
}

.error-code {
  font-family: var(--font-display);
  font-size: clamp(5rem, 15vw, 9rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =====================================================
   LANG SWITCHER
   ===================================================== */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  min-width: 200px;
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
}

.lang-switcher.open .lang-dropdown { display: block; }

.lang-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.lang-option:hover, .lang-option.active {
  background: var(--color-surface-alt);
  color: var(--color-primary);
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }
.sr-only     { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.hidden      { display: none !important; }
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2       { gap: var(--space-2); }
.gap-4       { gap: var(--space-4); }
.gap-6       { gap: var(--space-6); }
.mb-4        { margin-bottom: var(--space-4); }
.mb-6        { margin-bottom: var(--space-6); }
.mb-8        { margin-bottom: var(--space-8); }
.mt-4        { margin-top: var(--space-4); }
.mt-8        { margin-top: var(--space-8); }
.mt-12       { margin-top: var(--space-12); }
.w-full      { width: 100%; }
.bg-alt      { background: var(--color-surface-alt); }
.rounded-xl  { border-radius: var(--radius-xl); }

/* Content prose */
.prose p { color: var(--color-text-muted); line-height: 1.75; }
.prose strong { color: var(--color-text); }
.prose a { color: var(--color-primary); }

/* Highlight box */
.info-box {
  background: rgba(27,94,142,0.06);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: var(--space-4) var(--space-5);
  margin: var(--space-6) 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 var(--radius-md) 0;
  font-size: var(--text-sm);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.4); opacity: 0.6; }
}

.animate-fade-up { animation: fadeInUp 0.6s ease both; }
.animate-fade-in { animation: fadeIn 0.4s ease both; }
.anim-delay-1 { animation-delay: 0.1s; }
.anim-delay-2 { animation-delay: 0.2s; }
.anim-delay-3 { animation-delay: 0.3s; }
.anim-delay-4 { animation-delay: 0.4s; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .mobile-menu-btn { display: flex; }
  .header-cta .btn-outline { display: none; }

  .hero { padding: var(--space-12) 0 var(--space-10); }
  .hero-actions { gap: var(--space-3); }

  .tool-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; text-align: center; }

  .features-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }

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

  .section { padding: var(--space-12) 0; }
  .container { padding-left: var(--space-4); padding-right: var(--space-4); }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .tool-header { flex-direction: column; align-items: flex-start; }
  .hero-stats { gap: var(--space-6); }
}

/* Print */
@media print {
  .site-header, .site-footer, .tool-actions, .mobile-nav-overlay { display: none; }
}

/* =====================================================
   REAL-TIME CALCULATOR ENHANCEMENTS
   ===================================================== */

/* Inline validation hint below form inputs */
.field-hint {
  display: block;
  font-size: 0.72rem;
  margin-top: 0.25rem;
  min-height: 1rem;
  color: var(--color-text-light);
  transition: color 0.2s ease;
}

/* Smooth animated result card when result is available */
.tool-result {
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.tool-result.has-result {
  background: linear-gradient(135deg, var(--color-hero-gradient-from) 0%, #e8f4fd 100%);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27, 94, 142, 0.12);
}
.tool-result .tool-result-value {
  display: inline-block;
  will-change: opacity, transform;
  transition: opacity 0.12s ease, transform 0.12s ease;
}

/* Live-update pulse on result value */
@keyframes resultPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.06); color: var(--color-primary); }
  100% { transform: scale(1); }
}
.result-pop { animation: resultPop 0.25s ease forwards; }

/* Progress bars in % composition */
.data-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-xl);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.data-table th {
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}
.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tfoot td {
  background: var(--color-surface-alt);
  border-top: 2px solid var(--color-border-light);
  font-weight: 600;
}
.data-table tbody tr:hover { background: var(--color-hero-gradient-from); }

/* Input border flash on valid entry */
.form-input:not(:placeholder-shown):valid {
  border-color: var(--color-secondary);
}
.form-input.error { border-color: var(--color-error) !important; }

/* "Live" indicator badge on tool headers */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-secondary-dark);
  background: rgba(0, 184, 160, 0.1);
  border: 1px solid rgba(0, 184, 160, 0.3);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}
.live-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-secondary);
  border-radius: 50%;
  animation: livePulse 1.5s ease infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}