/* ============================================
   GEL₮ Guide — Main Stylesheet
   Mobile-First Responsive Design
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-primary: #9B1B30;
  --color-primary-dark: #7A1526;
  --color-primary-light: #B8344A;
  --color-gold: #D4A853;
  --color-gold-light: #E8C97A;
  --color-bg: #FAF7F2;
  --color-bg-alt: #F3EDE4;
  --color-text: #1A1A2E;
  --color-text-light: #5A5A6E;
  --color-success: #1B8A4E;
  --color-success-light: #E8F5EE;
  --color-warning: #E07B3C;
  --color-warning-light: #FDF0E6;
  --color-tether: #26A17B;
  --color-white: #FFFFFF;
  --color-border: #E8E0D4;

  --font-heading: 'Plus Jakarta Sans', 'Noto Sans Georgian', sans-serif;
  --font-body: 'Inter', 'Noto Sans Georgian', sans-serif;

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

  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 20px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 8px 40px rgba(26, 26, 46, 0.12);
  --shadow-hover: 0 12px 48px rgba(26, 26, 46, 0.16);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 0.3s var(--ease-out);

  --container-max: 1120px;
  --container-padding: 20px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* --- Utility --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 64px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  background: rgba(155, 27, 48, 0.08);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 560px;
}

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(232, 224, 212, 0.6);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  color: var(--color-text);
}

.nav-logo .gel-symbol {
  color: var(--color-tether);
  font-size: 22px;
}

.nav-links {
  display: none;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition);
  position: relative;
}

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

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

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

/* Hamburger */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

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

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

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

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(250, 247, 242, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  padding: 32px var(--container-padding);
  gap: 8px;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease-out);
  z-index: 999;
}

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

.mobile-menu a {
  display: block;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  padding: 16px 0;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition);
  min-height: 56px;
  display: flex;
  align-items: center;
}

.mobile-menu a:hover {
  color: var(--color-primary);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 40px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(250, 247, 242, 0.85) 0%,
    rgba(250, 247, 242, 0.6) 40%,
    rgba(250, 247, 242, 0.9) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: 20px;
}

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

.hero-title .gel {
  color: var(--color-tether);
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  min-height: 48px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(155, 27, 48, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(155, 27, 48, 0.4);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

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

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
}

.hero-stat-label {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* --- What is GEL₮ Section --- */
.explainer {
  background: var(--color-white);
}

.explainer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.explainer-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

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

.explainer-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.explainer-icon.red { background: rgba(155, 27, 48, 0.1); }
.explainer-icon.gold { background: rgba(212, 168, 83, 0.15); }
.explainer-icon.green { background: rgba(27, 138, 78, 0.1); }

.explainer-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.explainer-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Scenarios Section --- */
.scenarios {
  background: var(--color-bg);
}

.scenario-tabs {
  display: flex;
  gap: 8px;
  margin-top: 28px;
  margin-bottom: 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
}

.scenario-tabs::-webkit-scrollbar { display: none; }

.scenario-tab {
  flex-shrink: 0;
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition);
  min-height: 44px;
  cursor: pointer;
}

.scenario-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.scenario-content {
  display: none;
}

.scenario-content.active {
  display: block;
}

.scenario-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.scenario-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.scenario-image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.scenario-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scenario-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content h4 {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.scenario-result {
  margin-top: 20px;
  padding: 20px;
  background: var(--color-success-light);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-success);
}

.scenario-result h4 {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: 4px;
}

.scenario-result p {
  font-size: 14px;
  color: var(--color-text);
}

/* --- Comparison Section --- */
.comparison {
  background: var(--color-white);
}

.comparison-table {
  margin-top: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.comparison-header {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  background: var(--color-text);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
}

.comparison-header > div {
  padding: 14px 16px;
  text-align: center;
}

.comparison-header > div:first-child {
  text-align: left;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-row:hover {
  background: var(--color-bg);
}

.comparison-row > div {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.comparison-row > div:first-child {
  justify-content: flex-start;
  font-weight: 500;
}

.comparison-row .old-value {
  color: var(--color-text-light);
  text-decoration: line-through;
}

.comparison-row .new-value {
  color: var(--color-success);
  font-weight: 700;
}

.comparison-row .tag-save {
  display: inline-block;
  background: var(--color-success-light);
  color: var(--color-success);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 100px;
  margin-left: 6px;
}

/* Animated bars */
.comparison-bars {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bar-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bar-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-row-label {
  width: 48px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-light);
  flex-shrink: 0;
}

.bar-track {
  flex: 1;
  height: 28px;
  background: var(--color-bg-alt);
  border-radius: 100px;
  overflow: hidden;
  position: relative;
}

.bar-fill {
  height: 100%;
  border-radius: 100px;
  transition: width 1.2s var(--ease-out);
  width: 0;
  min-width: 0;
}

.bar-fill.old { background: linear-gradient(90deg, #B0A8A0, #8A8278); }
.bar-fill.new { background: linear-gradient(90deg, var(--color-success), #15A05A); }

.bar-value {
  width: 52px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  flex-shrink: 0;
  text-align: right;
}

.bar-value.new-val {
  color: var(--color-success);
}

/* --- Pitfalls Section --- */
.pitfalls {
  background: var(--color-bg);
}

.pitfall-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.pitfall-item {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.pitfall-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pitfall-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.pitfall-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-warning-light);
  color: var(--color-warning);
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pitfall-myth {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.pitfall-myth .x-mark {
  color: var(--color-warning);
  margin-right: 8px;
}

.pitfall-truth {
  padding: 12px 16px;
  background: var(--color-success-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.pitfall-truth .check-mark {
  color: var(--color-success);
  font-weight: 700;
  margin-right: 8px;
}

/* --- FAQ Section --- */
.faq {
  background: var(--color-white);
}

.faq-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  min-height: 56px;
  gap: 12px;
  transition: background var(--transition);
}

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

.faq-arrow {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease-out);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out), padding 0.3s var(--ease-out);
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer-inner {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- Footer --- */
.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand .footer-logo {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-brand .footer-logo .gel {
  color: var(--color-tether);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-links h4 {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  padding: 6px 0;
  transition: color var(--transition);
  min-height: 36px;
  display: flex;
  align-items: center;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  font-size: 12px;
  line-height: 1.8;
}

.footer-disclaimer {
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.4);
}

/* --- Scroll to top --- */
.scroll-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 100;
  cursor: pointer;
}

.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* ============================================
   Tablet Breakpoint (768px+)
   ============================================ */
@media (min-width: 768px) {
  :root {
    --container-padding: 32px;
  }

  body { font-size: 16px; }

  .section { padding: 80px 0; }

  .section-title { font-size: 32px; }

  .hero-title { font-size: 44px; }

  .hero-desc { font-size: 17px; }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .hero-stat-value { font-size: 32px; }

  .explainer-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .scenario-layout {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
  }

  .scenario-image img { height: 320px; }

  .comparison-header > div { padding: 16px 20px; font-size: 14px; }
  .comparison-row > div { padding: 18px 20px; }

  .footer-top {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* ============================================
   Desktop Breakpoint (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  :root {
    --container-padding: 48px;
  }

  .section { padding: 100px 0; }

  .section-title { font-size: 36px; }

  .nav-links {
    display: flex;
  }

  .nav-hamburger { display: none; }

  .hero-title { font-size: 52px; }

  .hero-stats { gap: 32px; }
  .hero-stat-value { font-size: 36px; }

  .explainer-grid { gap: 24px; }

  .scenario-layout { gap: 48px; }
  .scenario-image img { height: 380px; }

  .comparison-bars {
    flex-direction: row;
    gap: 32px;
  }

  .bar-group { flex: 1; }
}