/* ===================================
   BRUTALIST BONUS CALCULATOR STYLES
   =================================== */

/* Root Variables - Design Tokens */
:root {
  /* Colors - High Contrast Brutalist Palette */
  --color-black: #000000;
  --color-white: #ffffff;
  --color-dark-gray: #1a1a1a;
  --color-medium-gray: #333333;
  --color-light-gray: #e0e0e0;
  --color-accent: #ff0000;

  /* Typography */
  --font-family-display: "Courier New", monospace;
  --font-family-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-weight-regular: 400;
  --font-weight-bold: 700;
  --font-weight-black: 900;

  /* Spacing Scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius */
  --radius-none: 0;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;

  /* Shadows - Industrial brutalist */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.35);
}

/* ===================================
   GLOBAL STYLES
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-body);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-black);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  font-size: 1rem;
  line-height: 1.7;
}

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

a:hover {
  color: var(--color-accent);
}

button {
  cursor: pointer;
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  transition: all var(--transition-base);
  border: none;
  text-transform: uppercase;
}

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--color-white);
  border-bottom: 3px solid var(--color-black);
  z-index: 1000;
  animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  font-weight: var(--font-weight-black);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.logo-icon {
  font-size: 1.75rem;
  font-weight: var(--font-weight-black);
  color: var(--color-accent);
}

.logo-text {
  font-family: var(--font-family-display);
  letter-spacing: 0.05em;
}

.logo-sub {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  opacity: 0.6;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-family-display);
  font-size: 0.85rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background-color: var(--color-black);
  transition: all var(--transition-base);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--spacing-2xl);
  min-height: 100vh;
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero-content {
  z-index: 2;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: var(--font-weight-black);
  line-height: 1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
}

.hero-title .line {
  display: block;
  animation: slideUpFade 0.8s ease-out backwards;
}

.hero-title .line-1 {
  animation-delay: 0.1s;
}

.hero-title .line-2 {
  animation-delay: 0.2s;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-medium-gray);
  margin-bottom: var(--spacing-xl);
  animation: fadeIn 0.8s ease-out 0.3s backwards;
}

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

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  border: 2px solid var(--color-black);
  position: relative;
  overflow: hidden;
  animation: fadeIn 0.8s ease-out 0.4s backwards;
}

.hero-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  transition: left var(--transition-fast);
  z-index: -1;
}

.hero-cta:hover::before {
  left: 0;
}

.hero-cta:hover {
  color: var(--color-black);
  border-color: var(--color-accent);
}

.arrow {
  transition: transform var(--transition-fast);
}

.hero-cta:hover .arrow {
  transform: translateX(4px);
}

.hero-visual {
  position: relative;
  height: 500px;
  z-index: 1;
}

.geometric-shape {
  position: absolute;
  animation: float 4s ease-in-out infinite;
}

.shape-1 {
  width: 200px;
  height: 200px;
  border: 4px solid var(--color-black);
  top: 50px;
  right: 20px;
  animation-delay: 0s;
}

.shape-2 {
  width: 150px;
  height: 150px;
  border: 3px solid var(--color-accent);
  bottom: 100px;
  left: 50px;
  animation-delay: 0.5s;
}

.shape-3 {
  width: 100px;
  height: 100px;
  background-color: var(--color-black);
  bottom: 200px;
  right: 100px;
  animation-delay: 1s;
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-30px);
  }
}

/* ===================================
   SECTION COMMON STYLES
   =================================== */

section {
  padding: var(--spacing-2xl) var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  animation: slideUpFade 0.8s ease-out;
}

.section-header h2 {
  border-bottom: 3px solid var(--color-black);
  padding-bottom: var(--spacing-md);
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.section-header p {
  color: var(--color-medium-gray);
  font-size: 1.1rem;
}

/* ===================================
   CALCULATOR SECTION
   =================================== */

.calculator-section {
  background-color: var(--color-white);
  border-top: 3px solid var(--color-black);
  border-bottom: 3px solid var(--color-black);
}

.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  animation: fadeIn 0.8s ease-out;
}

.calculator-panel,
.results-panel {
  background-color: var(--color-white);
  border: 2px solid var(--color-black);
  padding: var(--spacing-xl);
}

.results-panel {
  background-color: var(--color-dark-gray);
  color: var(--color-white);
}

.results-panel h3 {
  margin-bottom: var(--spacing-lg);
  font-size: 1.5rem;
}

.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-group label {
  display: block;
  font-weight: var(--font-weight-bold);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-family-display);
}

.input-wrapper {
  display: flex;
  align-items: center;
  border: 2px solid var(--color-black);
  padding: var(--spacing-sm);
  background-color: var(--color-white);
  transition: all var(--transition-fast);
}

.input-wrapper:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

.input-wrapper input,
.input-group select {
  flex: 1;
  border: none;
  background: none;
  font-family: var(--font-family-display);
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  outline: none;
  color: var(--color-black);
}

.input-wrapper input::placeholder {
  color: var(--color-light-gray);
}

.currency,
.unit {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-bold);
  margin: 0 var(--spacing-xs);
  color: var(--color-medium-gray);
}

.currency {
  margin-right: var(--spacing-sm);
}

.toggle-advanced {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
  cursor: pointer;
}

.toggle-advanced input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.toggle-label {
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  font-family: var(--font-family-display);
  text-transform: uppercase;
  font-size: 0.9rem;
}

.advanced-options {
  display: none;
  padding: var(--spacing-lg);
  border: 2px dashed var(--color-medium-gray);
  margin-bottom: var(--spacing-lg);
  animation: slideDown 0.4s ease-out;
}

.advanced-options.active {
  display: block;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.checkbox-group label {
  cursor: pointer;
  margin-bottom: 0;
}

.input-group select {
  border: 2px solid var(--color-black);
  padding: var(--spacing-sm);
  background-color: var(--color-white);
  cursor: pointer;
  width: 100%;
}

.calculate-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: 1rem;
  border: 2px solid var(--color-black);
  margin-top: var(--spacing-lg);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.05em;
}

.calculate-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  transition: left var(--transition-base);
  z-index: -1;
}

.calculate-btn:hover::before {
  left: 0;
}

.calculate-btn:hover {
  color: var(--color-black);
  border-color: var(--color-accent);
}

.btn-icon {
  margin-left: var(--spacing-xs);
  display: inline-block;
  animation: pulse 1s ease-in-out infinite;
}

.calculate-btn:hover .btn-icon {
  animation: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(1.1);
  }
}

/* Results Panel */

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  font-weight: var(--font-weight-bold);
}

.result-item.primary {
  background-color: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--color-accent);
}

.result-item.final {
  font-size: 1.5rem;
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--color-accent);
  color: var(--color-black);
  margin-top: var(--spacing-md);
}

.result-label {
  font-family: var(--font-family-display);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--color-light-gray);
}

.result-value {
  font-family: var(--font-family-display);
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
  color: var(--color-white);
}

.result-value.final-value {
  color: var(--color-black);
  font-size: 1.75rem;
}

.result-value.tax,
.result-value.deduction {
  color: #ff6b6b;
}

.result-divider {
  height: 2px;
  background-color: rgba(255, 255, 255, 0.2);
  margin: var(--spacing-md) 0;
}

.breakdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  cursor: pointer;
}

.breakdown-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.breakdown-toggle label {
  cursor: pointer;
  font-family: var(--font-family-display);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.breakdown-table {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 2px solid rgba(255, 255, 255, 0.2);
}

.breakdown-table table {
  width: 100%;
  border-collapse: collapse;
}

.breakdown-table tr {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.breakdown-table td {
  font-family: var(--font-family-display);
}

.breakdown-table td.value {
  text-align: right;
}

.breakdown-table td.negative {
  color: #ff6b6b;
}

.breakdown-table tr.total {
  border-top: 2px solid rgba(255, 255, 255, 0.3);
  padding: var(--spacing-md) 0;
  font-weight: var(--font-weight-black);
  font-size: 1.1rem;
}

.comparison-info {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: rgba(255, 0, 0, 0.1);
  border-left: 3px solid var(--color-accent);
}

.comparison-info h4 {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}

.monthly-breakdown {
  display: flex;
  justify-content: space-between;
}

.monthly-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.monthly-value {
  font-size: 1.25rem;
  font-weight: var(--font-weight-black);
  font-family: var(--font-family-display);
}

/* ===================================
   FEATURES SECTION
   =================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  border: 2px solid var(--color-black);
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-dark-gray);
  color: var(--color-white);
  transition: top var(--transition-base);
  z-index: -1;
}

.feature-card:hover::before {
  top: 0;
}

.feature-card:hover {
  color: var(--color-white);
  transform: translateY(-8px);
}

.feature-card:hover h3 {
  color: var(--color-accent);
}

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

.feature-card h3 {
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
}

.feature-card p {
  line-height: 1.6;
  color: var(--color-medium-gray);
}

.feature-card:hover p {
  color: var(--color-light-gray);
}

/* ===================================
   HOW IT WORKS SECTION
   =================================== */

.steps-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  text-align: center;
  animation: slideUpFade 0.8s ease-out;
}

.step-number {
  font-size: 4rem;
  font-weight: var(--font-weight-black);
  font-family: var(--font-family-display);
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  display: block;
}

.step h3 {
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
}

.step p {
  color: var(--color-medium-gray);
  font-size: 0.95rem;
}

.step-divider {
  width: 100%;
  height: 3px;
  background-color: var(--color-black);
  position: relative;
}

.step-divider::after {
  content: "→";
  position: absolute;
  right: -20px;
  top: -15px;
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
}

/* ===================================
   STATISTICS SECTION
   =================================== */

.statistics {
  background-color: var(--color-dark-gray);
  color: var(--color-white);
  border-top: 3px solid var(--color-black);
  border-bottom: 3px solid var(--color-black);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-xl);
  border: 2px solid var(--color-accent);
  animation: slideUpFade 0.8s ease-out;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: var(--font-weight-black);
  font-family: var(--font-family-display);
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-family: var(--font-family-display);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* ===================================
   FAQ SECTION
   =================================== */

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.faq-item {
  border: 2px solid var(--color-black);
  padding: var(--spacing-xl);
  cursor: pointer;
  transition: all var(--transition-base);
}

.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.faq-question {
  margin-bottom: var(--spacing-md);
  color: var(--color-black);
  text-transform: uppercase;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
}

.faq-item:hover .faq-question::after {
  content: "−";
  color: var(--color-accent);
}

.faq-answer {
  color: var(--color-medium-gray);
  line-height: 1.7;
}

/* ===================================
   OTHER CALCULATORS SECTION
   =================================== */

.calculators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.calculator-link {
  display: block;
  padding: var(--spacing-xl);
  border: 3px solid var(--color-black);
  background-color: var(--color-white);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.calculator-link::before {
  content: "";
  position: absolute;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  transition: right var(--transition-base);
  z-index: -1;
}

.calculator-link:hover::before {
  right: 0;
}

.calculator-link h3 {
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}

.calculator-link p {
  margin-bottom: var(--spacing-md);
  color: var(--color-medium-gray);
}

.calculator-link:hover h3,
.calculator-link:hover p {
  color: var(--color-white);
}

.link-arrow {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
  transition: transform var(--transition-fast);
}

.calculator-link:hover .link-arrow {
  transform: translateX(8px);
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact {
  background-color: var(--color-dark-gray);
  color: var(--color-white);
  border-top: 3px solid var(--color-black);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
}

.form-group input,
.form-group textarea {
  flex: 1;
  padding: var(--spacing-md);
  border: 2px solid var(--color-accent);
  background-color: var(--color-black);
  color: var(--color-white);
  font-family: var(--font-family-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.3);
}

.submit-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--color-accent);
  color: var(--color-black);
  font-size: 1rem;
  border: 2px solid var(--color-accent);
  letter-spacing: 0.05em;
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-black);
  transition: left var(--transition-base);
  z-index: -1;
}

.submit-btn:hover::before {
  left: 0;
}

.submit-btn:hover {
  color: var(--color-accent);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
  background-color: var(--color-black);
  color: var(--color-white);
  border-top: 3px solid var(--color-accent);
  padding: var(--spacing-2xl) var(--spacing-md);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  font-size: 1rem;
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--spacing-sm);
}

.footer-column p {
  line-height: 1.7;
  color: var(--color-light-gray);
  margin-bottom: var(--spacing-md);
}

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

.footer-column ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--color-light-gray);
  transition: color var(--transition-fast);
  font-size: 0.95rem;
}

.footer-column a:hover {
  color: var(--color-accent);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-accent);
  font-weight: var(--font-weight-bold);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--color-accent);
  color: var(--color-black);
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  border-top: 2px solid var(--color-accent);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--color-light-gray);
  font-size: 0.9rem;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--color-white);
    width: 100%;
    text-align: center;
    transition: left var(--transition-base);
    gap: 0;
    border-bottom: 3px solid var(--color-black);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-light-gray);
  }

  .hamburger {
    display: flex;
  }

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

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

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

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-visual {
    display: none;
  }

  .calculator-wrapper {
    grid-template-columns: 1fr;
  }

  .steps-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .step-divider {
    display: none;
  }

  .step-divider::after {
    display: none;
  }

  section {
    padding: var(--spacing-xl) var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .logo-sub {
    display: none;
  }

  h2 {
    font-size: 1.75rem;
  }

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

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

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

  .stat-number {
    font-size: 2.5rem;
  }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

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

.text-uppercase {
  text-transform: uppercase;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}