/* ===== GOOGLE FONTS IMPORT ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');

/* ===== ROOT VARIABLES ===== */
:root {
  --primary-green: #10b981;
  --primary-green-dark: #059669;
  --primary-green-light: #34d399;
  --accent-green: #6ee7b7;
  --accent-gold: #fbbf24;
  --dark-bg: #0a0f1e;
  --dark-card: #151b2e;
  --dark-elevated: #1e293b;
  --white: #ffffff;
  --off-white: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-green: 0 10px 40px -10px rgba(16, 185, 129, 0.4);
  --shadow-green-lg: 0 20px 60px -15px rgba(16, 185, 129, 0.5);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== GLOBAL RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--gray-700);
  background: linear-gradient(135deg, var(--off-white) 0%, var(--gray-100) 100%);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-logo {
  color: var(--white);
  font-size: 3.5rem;
  margin-bottom: 2rem;
  animation: pulse 2s infinite;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3));
}

.loader-spinner {
  width: 70px;
  height: 70px;
  border: 6px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loader-text {
  color: var(--white);
  margin-top: 1.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 3px;
  animation: fadeIn 1.5s ease infinite alternate;
  text-transform: uppercase;
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.9; }
}

@keyframes fadeIn {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

/* ===== ANIMATED BACKGROUND ===== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(251, 191, 36, 0.06) 0%, transparent 50%);
  animation: rotate 40s linear infinite;
  z-index: -1;
  pointer-events: none;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== FLOATING PARTICLES ===== */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle, rgba(16, 185, 129, 0.1) 1px, transparent 1px),
    radial-gradient(circle, rgba(251, 191, 36, 0.08) 1px, transparent 1px);
  background-size: 50px 50px, 80px 80px;
  background-position: 0 0, 40px 60px;
  animation: floatParticles 60s linear infinite;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
}

@keyframes floatParticles {
  from { transform: translateY(0); }
  to { transform: translateY(-100px); }
}

/* ===== HEADER ===== */
header {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  padding: 1.25rem 0;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.15), 0 1px 3px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

header .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  animation: slideInLeft 0.6s ease;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.logo-icon {
  font-size: 2.75rem;
  color: var(--accent-gold);
  filter: drop-shadow(0 4px 8px rgba(251, 191, 36, 0.4));
  animation: float 3s ease-in-out infinite;
  transition: transform var(--transition-normal);
}

.logo-icon:hover {
  transform: scale(1.1) rotate(5deg);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

header h1 {
  color: var(--white);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* ===== MOBILE MENU TOGGLE ===== */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  cursor: pointer;
  padding: 0.65rem;
  z-index: 1001;
  border-radius: 8px;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.mobile-menu-toggle span {
  width: 26px;
  height: 3px;
  background: var(--white);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

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

/* ===== NAVIGATION ===== */
nav {
  display: flex;
  align-items: center;
  animation: slideInRight 0.6s ease;
}

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

nav ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  align-items: center;
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.4rem;
  border-radius: 10px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  backdrop-filter: blur(10px);
}

nav a i {
  font-size: 1.1rem;
  transition: transform var(--transition-normal);
}

nav a:hover i {
  transform: scale(1.15) rotate(5deg);
}

nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
  border-radius: 10px;
  z-index: -1;
}

nav a:hover::before {
  transform: scaleX(1);
}

nav a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
  border-radius: 2px;
}

nav a:hover::after {
  width: 60%;
}

/* ===== CURRENCY & THEME SECTION ===== */
.controls-section {
  background: var(--white);
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  animation: fadeInUp 0.6s ease 0.2s both;
  border: 1px solid var(--gray-200);
  transition: all var(--transition-normal);
}

.controls-section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

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

.currency-selector {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.currency-selector label {
  font-weight: 600;
  color: var(--gray-700);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
}

.currency-selector label i {
  color: var(--primary-green);
  font-size: 1.3rem;
}

#currencySelect {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  background: var(--white);
  color: var(--gray-700);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: 'Inter', sans-serif;
  min-width: 120px;
}

#currencySelect:hover {
  border-color: var(--primary-green);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
}

#currencySelect:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  color: var(--gray-700);
  font-weight: 600;
  font-size: 0.95rem;
}

.theme-toggle i {
  color: var(--accent-gold);
  font-size: 1.3rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 64px;
  height: 34px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gray-300);
  transition: var(--transition-normal);
  border-radius: 34px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.slider::before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background: var(--white);
  transition: var(--transition-normal);
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

input:checked + .slider {
  background: var(--primary-green);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

input:checked + .slider::before {
  transform: translateX(30px);
}

.slider:hover {
  transform: scale(1.05);
}

/* ===== MAIN CONTAINER ===== */
main {
  max-width: 1280px;
  margin: 2.5rem auto;
  padding: 0 2rem;
}

/* ===== CALCULATOR SECTIONS ===== */
.calculator-section {
  background: var(--white);
  border-radius: 24px;
  padding: 3rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gray-200);
  animation: fadeInUp 0.6s ease both;
}

.calculator-section:nth-child(2) {
  animation-delay: 0.1s;
}

.calculator-section:nth-child(3) {
  animation-delay: 0.2s;
}

.calculator-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--accent-green) 50%, var(--primary-green) 100%);
  background-size: 200% 100%;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.calculator-section:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl), var(--shadow-green-lg);
  border-color: var(--primary-green-light);
}

/* ===== SECTION HEADER ===== */
.section-header {
  margin-bottom: 2.5rem;
}

.section-header h2 {
  color: var(--gray-900);
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: -0.02em;
}

.section-header h2 i {
  color: var(--primary-green);
  margin-right: 0.75rem;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--accent-green) 100%);
  border-radius: 4px;
  animation: expandWidth 2s ease infinite;
}

@keyframes expandWidth {
  0%, 100% { width: 100px; }
  50% { width: 120px; }
}

.section-header p {
  color: var(--gray-600);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-top: 1.75rem;
  font-weight: 400;
}

/* ===== FORM STYLING ===== */
.calculator-form {
  display: grid;
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.form-group label {
  color: var(--gray-700);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.form-group label i {
  color: var(--primary-green);
  font-size: 1.1rem;
}

.form-group input {
  padding: 1.1rem 1.4rem;
  border: 2px solid var(--gray-200);
  border-radius: 14px;
  font-size: 1rem;
  color: var(--gray-700);
  background: var(--white);
  transition: all var(--transition-normal);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.form-group input:hover {
  border-color: var(--primary-green-light);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.08);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
  transform: translateY(-2px);
}

/* ===== BUTTONS ===== */
.btn {
  padding: 1.1rem 2.75rem;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  position: relative;
  overflow: hidden;
  font-family: 'Space Grotesk', sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  color: var(--white);
  box-shadow: var(--shadow-md), 0 0 20px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-xl), var(--shadow-green-lg);
}

.btn-primary:active {
  transform: translateY(-2px) scale(0.98);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--gray-600) 0%, var(--gray-700) 100%);
  color: var(--white);
  box-shadow: var(--shadow-md);
  padding: 0.85rem 1.75rem;
  font-size: 0.9rem;
}

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

/* ===== RESULT CONTAINER ===== */
.result-container {
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--off-white) 100%);
  border-radius: 20px;
  padding: 2.5rem;
  margin-top: 2.5rem;
  border: 2px solid var(--gray-200);
  animation: fadeIn 0.5s ease;
}

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

.result-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
}

.result-card h3 {
  color: var(--primary-green-dark);
  font-size: 1.75rem;
  margin-bottom: 2rem;
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.01em;
}

.result-card h3 i {
  color: var(--accent-gold);
  font-size: 1.5rem;
}

.result-card p {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--gray-100);
  border-radius: 12px;
  transition: all var(--transition-normal);
  font-weight: 500;
  border: 1px solid transparent;
}

.result-card p:hover {
  transform: translateX(8px);
  background: linear-gradient(135deg, var(--primary-green-light) 0%, var(--primary-green) 100%);
  color: var(--white);
  border-color: var(--primary-green);
  box-shadow: var(--shadow-md);
}

.result-card p strong {
  font-weight: 700;
}

/* ===== AMORTIZATION CARD ===== */
.amortization-card {
  background: var(--white);
  border-radius: 24px;
  padding: 3rem;
  margin-top: 3rem;
  box-shadow: var(--shadow-2xl);
  border: 2px solid var(--primary-green-light);
  display: none;
  position: relative;
  overflow: hidden;
}

.amortization-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--accent-green) 50%, var(--primary-green) 100%);
  background-size: 200% 100%;
  animation: gradientShift 3s ease infinite;
}

.amortization-card.active {
  display: block;
  animation: slideUp 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.amortization-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
}

.amortization-header h3 {
  color: var(--primary-green-dark);
  font-size: 2rem;
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  display: flex;
  align-items: center;
  gap: 1rem;
  letter-spacing: -0.02em;
}

.amortization-header h3 i {
  color: var(--accent-gold);
  font-size: 1.75rem;
  animation: bounce 2s ease infinite;
}

.close-amortization {
  background: var(--gray-200);
  color: var(--gray-700);
  border: none;
  padding: 0.65rem 1.5rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 700;
  font-size: 0.9rem;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.close-amortization:hover {
  background: var(--primary-green);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.amortization-table-container {
  overflow-x: auto;
  max-height: 650px;
  border-radius: 16px;
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--gray-200);
  margin-top: 1.5rem;
}

.amortization-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.amortization-table thead {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.amortization-table th {
  padding: 1.25rem 1.5rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-family: 'Space Grotesk', sans-serif;
}

.amortization-table tbody tr {
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--transition-fast);
}

.amortization-table tbody tr:hover {
  background: linear-gradient(90deg, var(--gray-100) 0%, var(--off-white) 100%);
  transform: scale(1.01);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.amortization-table tbody tr:nth-child(even) {
  background: rgba(241, 245, 249, 0.5);
}

.amortization-table td {
  padding: 1.25rem 1.5rem;
  color: var(--gray-700);
  font-weight: 500;
}

.amortization-table td:first-child {
  font-weight: 700;
  color: var(--primary-green-dark);
}

/* ===== COMPARISON FORM ===== */
.comparison-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.comparison-offer {
  background: var(--gray-100);
  padding: 2rem;
  border-radius: 20px;
  border: 2px solid var(--gray-200);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.comparison-offer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--accent-green) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.comparison-offer:hover::before {
  transform: scaleX(1);
}

.comparison-offer:hover {
  border-color: var(--primary-green);
  box-shadow: var(--shadow-xl);
  transform: translateY(-5px) scale(1.02);
}

.comparison-offer h3 {
  color: var(--primary-green-dark);
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.comparison-offer h3 i {
  color: var(--accent-gold);
}

/* ===== FOOTER ===== */
footer {
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--dark-card) 100%);
  color: var(--white);
  padding: 3.5rem 0 2rem;
  margin-top: 5rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--accent-green) 50%, var(--primary-green) 100%);
  background-size: 200% 100%;
  animation: gradientShift 3s ease infinite;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 2rem;
}

.footer-logo h2 {
  color: var(--primary-green-light);
  font-size: 1.75rem;
  margin-bottom: 1rem;
  font-family: 'Space Grotesk', sans-serif;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo h2 i {
  color: var(--accent-gold);
}

.footer-bottom {
  text-align: center;
  padding-top: 2.5rem;
  border-top: 1px solid var(--gray-700);
  color: var(--gray-400);
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

/* ===== DARK MODE ===== */
body.dark-mode {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-card) 100%);
  color: var(--gray-300);
}

body.dark-mode .calculator-section,
body.dark-mode .controls-section,
body.dark-mode .amortization-card {
  background: var(--dark-card);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  border-color: var(--gray-800);
}

body.dark-mode .calculator-section:hover,
body.dark-mode .amortization-card:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), var(--shadow-green);
  border-color: var(--primary-green-dark);
}

body.dark-mode .section-header h2,
body.dark-mode .amortization-header h3,
body.dark-mode .result-card h3 {
  color: var(--white);
}

body.dark-mode .section-header p,
body.dark-mode .form-group label {
  color: var(--gray-400);
}

body.dark-mode .form-group input,
body.dark-mode #currencySelect {
  background: var(--dark-elevated);
  border-color: var(--gray-800);
  color: var(--gray-200);
}

body.dark-mode .form-group input:hover,
body.dark-mode #currencySelect:hover {
  border-color: var(--primary-green);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2);
}

body.dark-mode .form-group input:focus,
body.dark-mode #currencySelect:focus {
  border-color: var(--primary-green-light);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}

body.dark-mode .result-container {
  background: var(--dark-bg);
  border-color: var(--gray-800);
}

body.dark-mode .result-card {
  background: var(--dark-elevated);
  border-color: var(--gray-800);
}

body.dark-mode .result-card p {
  background: var(--dark-bg);
  color: var(--gray-300);
  border-color: var(--gray-800);
}

body.dark-mode .result-card p:hover {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  color: var(--white);
  border-color: var(--primary-green);
}

body.dark-mode .theme-toggle,
body.dark-mode .currency-selector label {
  color: var(--gray-200);
}

body.dark-mode .comparison-offer {
  background: var(--dark-elevated);
  border-color: var(--gray-800);
}

body.dark-mode .comparison-offer:hover {
  border-color: var(--primary-green);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

body.dark-mode .comparison-offer h3 {
  color: var(--white);
}

body.dark-mode .amortization-table-container {
  border-color: var(--gray-800);
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.3);
}

body.dark-mode .amortization-table tbody tr {
  border-bottom-color: var(--gray-800);
}

body.dark-mode .amortization-table tbody tr:hover {
  background: var(--dark-elevated);
}

body.dark-mode .amortization-table tbody tr:nth-child(even) {
  background: rgba(30, 41, 59, 0.5);
}

body.dark-mode .amortization-table td {
  color: var(--gray-300);
}

body.dark-mode .amortization-table td:first-child {
  color: var(--primary-green-light);
}

body.dark-mode .close-amortization {
  background: var(--dark-elevated);
  color: var(--gray-300);
}

body.dark-mode .close-amortization:hover {
  background: var(--primary-green);
  color: var(--white);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  header .container,
  main,
  .footer-content,
  .footer-bottom {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .calculator-section {
    padding: 2.5rem;
  }

  .section-header h2 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  /* Header adjustments */
  header {
    padding: 1rem 0;
  }

  header .container {
    padding: 0 1.25rem;
  }

  header h1 {
    font-size: 1.4rem;
  }

  .logo-icon {
    font-size: 2.2rem;
  }

  /* Mobile menu toggle */
  .mobile-menu-toggle {
    display: flex;
  }

  /* Navigation mobile */
  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: linear-gradient(135deg, var(--primary-green-dark) 0%, var(--primary-green) 100%);
    transition: left var(--transition-slow);
    padding: 2rem 1.25rem;
    overflow-y: auto;
    box-shadow: inset 0 4px 12px rgba(0, 0, 0, 0.2);
  }

  nav.active {
    left: 0;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  nav li {
    width: 100%;
    animation: slideInLeft 0.4s ease both;
  }

  nav li:nth-child(1) { animation-delay: 0.1s; }
  nav li:nth-child(2) { animation-delay: 0.2s; }
  nav li:nth-child(3) { animation-delay: 0.3s; }
  nav li:nth-child(4) { animation-delay: 0.4s; }

  nav a {
    width: 100%;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    justify-content: flex-start;
    font-size: 1.05rem;
    border-radius: 12px;
    margin-bottom: 0.5rem;
  }

  nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(8px);
  }

  /* Main content */
  main {
    margin: 1.5rem auto;
    padding: 0 1.25rem;
  }

  /* Calculator sections */
  .calculator-section {
    padding: 1.75rem;
    margin-bottom: 2rem;
    border-radius: 20px;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .section-header p {
    font-size: 0.95rem;
    margin-top: 1.25rem;
  }

  /* Controls section */
  .controls-section {
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .currency-selector,
  .theme-toggle {
    width: 100%;
    justify-content: space-between;
  }

  #currencySelect {
    flex: 1;
    max-width: 200px;
  }

  /* Form groups */
  .calculator-form {
    gap: 1.5rem;
  }

  .form-group input {
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
  }

  /* Buttons */
  .btn {
    width: 100%;
    padding: 1.1rem 2rem;
    font-size: 0.95rem;
  }

  .btn-secondary {
    padding: 0.9rem 1.5rem;
  }

  /* Result container */
  .result-container {
    padding: 1.75rem;
    margin-top: 2rem;
  }

  .result-card {
    padding: 1.75rem;
  }

  .result-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
  }

  .result-card p {
    padding: 1rem 1.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .result-card p:hover {
    transform: translateX(0);
  }

  /* Amortization card */
  .amortization-card {
    padding: 1.75rem;
    margin-top: 2rem;
    border-radius: 20px;
  }

  .amortization-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
  }

  .amortization-header h3 {
    font-size: 1.5rem;
  }

  .close-amortization {
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .amortization-table-container {
    max-height: 500px;
    border-radius: 12px;
  }

  .amortization-table {
    font-size: 0.85rem;
  }

  .amortization-table th,
  .amortization-table td {
    padding: 0.9rem 0.75rem;
    font-size: 0.85rem;
  }

  .amortization-table th {
    font-size: 0.8rem;
  }

  /* Comparison container */
  .comparison-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .comparison-offer {
    padding: 1.5rem;
  }

  .comparison-offer h3 {
    font-size: 1.25rem;
  }

  /* Footer */
  footer {
    padding: 2.5rem 0 1.5rem;
    margin-top: 3rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 0 1.25rem;
  }

  .footer-logo h2 {
    font-size: 1.5rem;
  }

  .footer-bottom {
    padding: 1.5rem 1.25rem 0;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  /* Extra small devices */
  header h1 {
    font-size: 1.2rem;
  }

  .logo-icon {
    font-size: 2rem;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .calculator-section {
    padding: 1.5rem;
  }

  .amortization-card {
    padding: 1.5rem;
  }

  .result-container {
    padding: 1.5rem;
  }

  .result-card {
    padding: 1.5rem;
  }

  .amortization-table th,
  .amortization-table td {
    padding: 0.75rem 0.5rem;
    font-size: 0.8rem;
  }
}

/* ===== SMOOTH SCROLLING ===== */
html {
  scroll-behavior: smooth;
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  border-radius: 10px;
  border: 2px solid var(--gray-100);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-green-dark) 0%, var(--primary-green) 100%);
}

body.dark-mode ::-webkit-scrollbar-track {
  background: var(--dark-bg);
}

body.dark-mode ::-webkit-scrollbar-thumb {
  border-color: var(--dark-bg);
}

/* ===== PRINT STYLES ===== */
@media print {
  body::before,
  body::after,
  header,
  .controls-section,
  .mobile-menu-toggle,
  footer,
  .btn,
  .close-amortization {
    display: none !important;
  }

  .calculator-section,
  .amortization-card {
    box-shadow: none;
    page-break-inside: avoid;
  }
}