/* ================================
   Coin002 — Crypto Web3 Design
   ================================ */

/* CSS Variables */
:root {
  /* Colors - Dark crypto theme */
  --bg-primary: #050510;
  --bg-secondary: #0a0a1a;
  --bg-card: rgba(15, 15, 35, 0.8);
  --bg-card-hover: rgba(25, 25, 55, 0.9);
  
  /* Accent colors */
  --accent-primary: #22c55e;
  --accent-secondary: #3b82f6;
  --accent-tertiary: #a855f7;
  --accent-warning: #f59e0b;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #22c55e 0%, #3b82f6 50%, #a855f7 100%);
  --gradient-glow: linear-gradient(135deg, rgba(34, 197, 94, 0.4) 0%, rgba(59, 130, 246, 0.4) 50%, rgba(168, 85, 247, 0.4) 100%);
  --gradient-card: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
  
  /* Text colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Borders */
  --border-color: rgba(148, 163, 184, 0.15);
  --border-glow: rgba(34, 197, 94, 0.3);
  
  /* Typography */
  --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', monospace;
  
  /* Spacing */
  --container-max: 1200px;
  --section-padding: 100px;
  --header-height: 80px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

input, select {
  font-family: inherit;
}

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

/* Animated Backgrounds */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: -10;
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -5;
  pointer-events: none;
  animation: glowFloat 20s ease-in-out infinite;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  left: -100px;
  background: rgba(34, 197, 94, 0.15);
  animation-delay: 0s;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  top: 40%;
  right: -150px;
  background: rgba(59, 130, 246, 0.12);
  animation-delay: -7s;
}

.bg-glow-3 {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: 30%;
  background: rgba(168, 85, 247, 0.1);
  animation-delay: -14s;
}

@keyframes glowFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.1); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 30px) scale(1.05); }
}

/* Floating Coins */
.floating-coins {
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  overflow: hidden;
}

.coin {
  position: absolute;
  font-size: 2rem;
  opacity: 0.15;
  animation: coinFloat 30s ease-in-out infinite;
}

.coin-1 { top: 15%; left: 10%; animation-delay: 0s; }
.coin-2 { top: 25%; right: 15%; animation-delay: -5s; }
.coin-3 { top: 60%; left: 5%; animation-delay: -10s; }
.coin-4 { top: 70%; right: 8%; animation-delay: -15s; }
.coin-5 { top: 85%; left: 40%; animation-delay: -20s; }

@keyframes coinFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-50px) rotate(180deg); }
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container-sm {
  max-width: 800px;
}

/* ================================
   HEADER
   ================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(5, 5, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.4rem;
}

.logo-icon {
  font-size: 1.8rem;
}

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

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-select {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
}

.lang-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

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

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

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

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 5, 16, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 32px 24px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: none;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-link {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-divider {
  height: 1px;
  background: var(--border-color);
  margin: 16px 0;
}

/* ================================
   BUTTONS
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #000;
  box-shadow: 0 0 30px rgba(34, 197, 94, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(34, 197, 94, 0.4);
}

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

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-secondary);
}

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

.btn-outline:hover {
  background: rgba(34, 197, 94, 0.1);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 18px;
  height: 18px;
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: var(--section-padding);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

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

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 40px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-color);
}

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

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
}

.chart-mockup {
  width: 100%;
  max-width: 450px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px;
  backdrop-filter: blur(10px);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.chart-title {
  font-weight: 600;
  color: var(--text-secondary);
}

.chart-badge {
  background: rgba(34, 197, 94, 0.1);
  color: var(--accent-primary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
}

.chart-graph {
  margin-bottom: 20px;
}

.chart-svg {
  width: 100%;
  height: auto;
}

.chart-line {
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  animation: drawLine 2s ease forwards;
}

@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}

.chart-dot {
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { r: 6; opacity: 1; }
  50% { r: 10; opacity: 0.7; }
}

.chart-footer {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.chart-coin {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-primary);
}

/* ================================
   SECTIONS
   ================================ */
.section {
  padding: var(--section-padding) 0;
}

.section-dark {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-badge {
  display: inline-block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ================================
   HOW IT WORKS
   ================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: 0 20px 60px rgba(34, 197, 94, 0.1);
}

.step-number {
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.5;
}

.step-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-glow);
  border-radius: 50%;
  color: var(--accent-primary);
}

.step-icon svg {
  width: 36px;
  height: 36px;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ================================
   CALCULATOR
   ================================ */
.calculator-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.calc-input-group {
  margin-bottom: 32px;
}

.calc-label {
  display: block;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.calc-input-wrapper {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  transition: border-color var(--transition-fast);
}

.calc-input-wrapper:focus-within {
  border-color: var(--accent-primary);
}

.calc-currency {
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.calc-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 12px 16px 12px 0;
}

.calc-input::-webkit-outer-spin-button,
.calc-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.calc-presets {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.calc-preset {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.calc-preset:hover,
.calc-preset.active {
  background: rgba(34, 197, 94, 0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.calc-period-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.calc-period {
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.calc-period:hover,
.calc-period.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #000;
}

.calc-results {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.calc-result-main {
  text-align: center;
  padding: 32px;
  background: var(--gradient-glow);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.calc-result-label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.calc-result-value {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.calc-result-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.calc-detail {
  text-align: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
}

.calc-detail-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.calc-detail-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

/* ================================
   ABOUT SECTION
   ================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content .section-badge,
.about-content .section-title {
  text-align: left;
}

.about-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.feature-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Memecoin Showcase */
.about-visual {
  display: flex;
  justify-content: center;
}

.memecoin-showcase {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 350px;
}

.memecoin-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  gap: 4px 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.memecoin-card:hover {
  transform: translateX(10px);
  border-color: var(--border-glow);
}

.memecoin-emoji {
  font-size: 2.5rem;
  grid-row: span 2;
  align-self: center;
}

.memecoin-name {
  font-weight: 600;
  font-size: 1.1rem;
}

.memecoin-gain {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-primary);
  font-size: 1.1rem;
  text-align: right;
}

.memecoin-period {
  color: var(--text-muted);
  font-size: 0.85rem;
  grid-column: 2 / 4;
}

/* ================================
   PAYMENT METHODS
   ================================ */
.payment-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.payment-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition-normal);
}

.payment-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
}

.payment-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.payment-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.payment-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ================================
   FAQ
   ================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover,
.faq-item.active {
  border-color: var(--border-glow);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--text-muted);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

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

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

.faq-answer p {
  padding: 0 24px 24px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ================================
   CTA SECTION
   ================================ */
.section-cta {
  background: var(--gradient-glow);
  position: relative;
  overflow: hidden;
}

.section-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg-primary);
  opacity: 0.9;
}

.cta-content {
  position: relative;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.cta-actions {
  margin-bottom: 16px;
}

.cta-note {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ================================
   FOOTER
   ================================ */
.footer {
  background: var(--bg-secondary);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-color);
}

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

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 280px;
}

.footer-links h5 {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-disclaimer {
  font-size: 0.8rem;
}

/* ================================
   RESPONSIVE
   ================================ */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  /* Text content first on mobile, visual second */
  .hero-content {
    order: -1;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin: 0 auto;
  }
  
  .calculator-card {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .about-content {
    text-align: center;
  }
  
  .about-content .section-badge,
  .about-content .section-title {
    text-align: center;
  }
  
  .payment-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
    --header-height: 70px;
  }
  
  .nav {
    display: none;
  }
  
  .header-actions .btn {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu {
    display: block;
  }
  
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 48px);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  
  .stat-divider {
    width: 60%;
    height: 1px;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .chart-mockup {
    padding: 20px;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
  
  .payment-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .calc-result-details {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .footer-tagline {
    text-align: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .calc-presets {
    justify-content: center;
  }
  
  .calc-period-btns {
    justify-content: center;
  }
  
  .calc-result-value {
    font-size: 2.5rem;
  }
}