/* =========================================
   Progressive Money - Main Stylesheet
   Dark Fintech Theme with Green Accents
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* === CSS Variables === */
:root {
  --bg-primary: #070d1a;
  --bg-secondary: #0d1526;
  --bg-card: #111d35;
  --bg-card-hover: #162340;
  --bg-glass: rgba(17, 29, 53, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(0, 212, 110, 0.3);

  --green-primary: #00d46e;
  --green-secondary: #00b85c;
  --green-glow: rgba(0, 212, 110, 0.2);
  --teal-accent: #00c8b0;
  --blue-accent: #4f8ef7;

  --text-primary: #f0f4ff;
  --text-secondary: #8898bb;
  --text-muted: #4d6080;

  --gradient-primary: linear-gradient(135deg, #00d46e 0%, #00c8b0 100%);
  --gradient-bg: linear-gradient(180deg, #070d1a 0%, #0a1220 100%);
  --gradient-card: linear-gradient(145deg, #111d35 0%, #0d1526 100%);

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(0, 212, 110, 0.15);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-primary: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 110, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(79, 142, 247, 0.04) 0%, transparent 50%);
}

a { color: var(--green-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--teal-accent); }

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

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--green-secondary); border-radius: 3px; }

/* =========================================
   NAVBAR
   ========================================= */
.navbar {
  background: rgba(7, 13, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0;
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.navbar-logo {
  height: 38px;
  width: auto;
}

.navbar-brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link .arrow {
  font-size: 0.7rem;
  transition: transform 0.3s;
}

/* Dropdown */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 240px;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition);
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item:hover .arrow { transform: rotate(180deg); }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.dropdown-item:hover {
  color: var(--green-primary);
  background: var(--green-glow);
}

.dropdown-item .icon { font-size: 1rem; }

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

/* Two-column dropdown */
.dropdown-menu.two-col {
  min-width: 480px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.dropdown-menu.two-col .dropdown-item { font-size: 0.82rem; }

.navbar-cta {
  background: var(--gradient-primary);
  color: var(--bg-primary) !important;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: 50px;
}

.navbar-cta:hover {
  background: var(--green-secondary) !important;
  color: var(--bg-primary) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

/* Hamburger */
.navbar-toggler {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.navbar-toggler span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 110, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 10%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(79, 142, 247, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green-glow);
  border: 1px solid var(--border-accent);
  color: var(--green-primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--green-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  border: 1px solid var(--border-color);
}

.hero-image img {
  width: 100%;
  display: block;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.stat-item:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-primary);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  letter-spacing: -0.2px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(0, 212, 110, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 110, 0.4);
  color: var(--bg-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 1rem;
}

.btn-block { width: 100%; justify-content: center; }

.btn-calc {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  width: 100%;
  cursor: pointer;
  border: none;
  font-family: var(--font-primary);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 212, 110, 0.25);
}

.btn-calc:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 110, 0.4);
}

.btn-reset {
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  width: 100%;
  cursor: pointer;
  border: 1px solid var(--border-color);
  font-family: var(--font-primary);
  transition: var(--transition);
}

.btn-reset:hover {
  border-color: rgba(255,255,255,0.2);
  color: var(--text-primary);
}

/* =========================================
   CALCULATOR GRID / CARDS
   ========================================= */
.section {
  padding: 80px 0;
}

.section-sm { padding: 40px 0; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green-glow);
  border: 1px solid var(--border-accent);
  color: var(--green-primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Category Filters */
.category-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--green-glow);
  border-color: var(--border-accent);
  color: var(--green-primary);
}

/* Calculator Cards Grid */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.calc-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
  color: inherit;
}

.calc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

.calc-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-hover), var(--shadow-glow);
  transform: translateY(-4px);
  color: inherit;
}

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

.calc-card-icon {
  width: 52px;
  height: 52px;
  background: var(--green-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  border: 1px solid var(--border-accent);
  transition: var(--transition);
}

.calc-card:hover .calc-card-icon {
  background: var(--gradient-primary);
  box-shadow: 0 8px 20px rgba(0, 212, 110, 0.3);
}

.calc-card-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--green-primary);
  margin-bottom: 8px;
}

.calc-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.calc-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.calc-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calc-card-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: 50px;
  color: var(--blue-accent);
}

.calc-card-arrow {
  width: 32px;
  height: 32px;
  background: var(--green-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-primary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.calc-card:hover .calc-card-arrow {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  transform: translateX(3px);
}

/* =========================================
   CALCULATOR PAGE LAYOUT
   ========================================= */
.calc-page-hero {
  background: var(--gradient-card);
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0 40px;
}

.calc-page-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.calc-page-breadcrumb a { color: var(--text-muted); }
.calc-page-breadcrumb a:hover { color: var(--green-primary); }
.calc-page-breadcrumb span { color: var(--text-primary); }

.calc-page-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 12px;
}

.calc-page-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  line-height: 1.6;
}

/* Two-column calculator layout */
.calc-main-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  padding: 40px 0;
  align-items: start;
}

.calc-left { }

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

/* Calculator widget */
.calc-widget {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.calc-widget-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calc-widget-title .icon {
  width: 36px;
  height: 36px;
  background: var(--green-glow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-accent);
}

/* Form Elements */
.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.form-label-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--green-primary);
  background: var(--green-glow);
  padding: 2px 10px;
  border-radius: 50px;
  border: 1px solid var(--border-accent);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix, .input-suffix {
  position: absolute;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  z-index: 1;
}

.input-prefix { left: 14px; }
.input-suffix { right: 14px; }

.form-control {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: var(--transition);
  appearance: none;
}

.form-control:focus {
  outline: none;
  border-color: var(--green-primary);
  background: rgba(0, 212, 110, 0.04);
  box-shadow: 0 0 0 3px rgba(0, 212, 110, 0.1);
}

.form-control.has-prefix { padding-left: 36px; }
.form-control.has-suffix { padding-right: 36px; }

/* Range Slider */
.range-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  margin-top: 12px;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--gradient-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0, 212, 110, 0.5);
  transition: var(--transition);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 16px rgba(0, 212, 110, 0.7);
}

.range-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--gradient-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 8px rgba(0, 212, 110, 0.5);
}

/* Select */
select.form-control {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238898bb' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

select.form-control option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* =========================================
   RESULT CARD
   ========================================= */
.result-card {
  background: linear-gradient(135deg, rgba(0, 212, 110, 0.1) 0%, rgba(0, 200, 176, 0.05) 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-top: 24px;
  display: none;
}

.result-card.show { display: block; animation: fadeInUp 0.4s ease; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-main {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.result-label {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.result-value {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  line-height: 1.1;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.result-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.result-item-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.result-item-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.result-item-value.positive { color: var(--green-primary); }
.result-item-value.negative { color: #ff6b6b; }

/* Doughnut chart placeholder */
.chart-wrapper {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 20px;
}

canvas.donut-chart {
  width: 180px !important;
  height: 180px !important;
}

.chart-center-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.chart-center-value {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.chart-center-text {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Chart Legend */
.chart-legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.legend-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  flex: 1;
}

.legend-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* =========================================
   AD SPACE
   ========================================= */
.ad-space {
  background: linear-gradient(135deg, rgba(79, 142, 247, 0.05) 0%, rgba(0, 212, 110, 0.05) 100%);
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.ad-space::before {
  content: '📢 Advertisement';
  position: absolute;
  top: 8px;
  left: 12px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.ad-space-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.ad-space-icon { font-size: 2rem; opacity: 0.3; }

.ad-space-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.ad-space-dims {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* Ad space sizes */
.ad-space.ad-banner {
  padding: 24px;
  min-height: 100px;
}

.ad-space.ad-sidebar {
  min-height: 280px;
  padding: 40px 20px;
}

.ad-space.ad-leaderboard {
  min-height: 90px;
  padding: 20px;
}

/* =========================================
   CONTENT SECTIONS (SEO)
   ========================================= */
.content-section {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin-top: 32px;
}

.content-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.4px;
}

.content-section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--green-primary);
}

.content-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.content-section ul, .content-section ol {
  color: var(--text-secondary);
  padding-left: 24px;
  margin-bottom: 16px;
}

.content-section li {
  margin-bottom: 8px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.formula-box {
  background: rgba(0, 212, 110, 0.05);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  color: var(--green-primary);
  line-height: 1.8;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.info-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
}

.info-item h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.info-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-btn:hover {
  background: var(--green-glow);
  border-color: var(--border-accent);
  color: var(--green-primary);
}

.footer-heading {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover { color: var(--green-primary); transform: translateX(3px); }

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom-text {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-bottom-links a:hover { color: var(--green-primary); }

/* =========================================
   ABOUT / STATIC PAGES
   ========================================= */
.page-hero {
  background: var(--gradient-card);
  border-bottom: 1px solid var(--border-color);
  padding: 80px 0 60px;
  text-align: center;
}

.page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.page-hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--green-glow);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =========================================
   NOTIFICATION / ALERT STYLES
   ========================================= */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.alert-info {
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.25);
  color: #7baeff;
}

.alert-success {
  background: rgba(0, 212, 110, 0.1);
  border: 1px solid var(--border-accent);
  color: var(--green-primary);
}

.alert-warning {
  background: rgba(255, 196, 0, 0.1);
  border: 1px solid rgba(255, 196, 0, 0.25);
  color: #ffc400;
}

/* =========================================
   TABLE STYLES
   ========================================= */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  font-size: 0.875rem;
}

.data-table th {
  background: rgba(255, 255, 255, 0.06);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

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

.table-wrapper {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 28px;
}

.table-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
  font-weight: 700;
}

/* =========================================
   BREADCRUMB
   ========================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 16px 0;
}

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

/* =========================================
   MISC UTILITIES
   ========================================= */
.text-center { text-align: center; }
.text-green { color: var(--green-primary); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.divider {
  height: 1px;
  background: var(--border-color);
  margin: 32px 0;
}

/* Glassmorphism card */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

/* Tag */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
}

.tag-green {
  background: var(--green-glow);
  border: 1px solid var(--border-accent);
  color: var(--green-primary);
}

.tag-blue {
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.25);
  color: var(--blue-accent);
}

/* Loading spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(0, 212, 110, 0.2);
  border-top-color: var(--green-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1100px) {
  .calc-main-layout {
    grid-template-columns: 1fr;
  }

  .calc-right {
    position: static;
    order: -1;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .navbar-nav { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); flex-direction: column; padding: 16px; gap: 4px; z-index: 999; }
  .navbar-nav.open { display: flex; }
  .dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: rgba(255,255,255,0.03); margin-top: 4px; }
  .dropdown-menu.two-col { grid-template-columns: 1fr; min-width: unset; }
  .navbar-toggler { display: flex; }

  .hero-container { grid-template-columns: 1fr; gap: 40px; }
  .hero-image { display: none; }
  .hero-stats { grid-template-columns: 1fr 1fr; }

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

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

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .footer-bottom { flex-direction: column; text-align: center; }

  .section { padding: 56px 0; }

  .content-section { padding: 28px 20px; }

  .calc-widget { padding: 24px 20px; }

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

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

@media (max-width: 480px) {
  .calc-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}