/* ==========================================================================
   MercMise Landing Page - Light Cream & Elegant Serif Design System
   Built with Warm White/Cream Tokens, Luxury Gold Accents & Elegant Typography
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;0,800;1,600&family=Kanit:wght@300;400;500;600;700&family=Prompt:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Light Cream & Luxury Gold Palette Tokens */
  --bg-main: #faf8f5;
  --bg-surface: #ffffff;
  --bg-card: #f5f0eb;
  --bg-card-hover: #ede5da;
  --bg-glass: rgba(250, 248, 245, 0.92);
  
  --border-subtle: rgba(197, 160, 89, 0.2);
  --border-glow: rgba(184, 134, 11, 0.4);
  --border-emerald: rgba(13, 148, 136, 0.3);
  
  --primary: #b8860b;
  --primary-hover: #996515;
  --primary-glow: rgba(184, 134, 11, 0.2);
  
  --accent-gold: #c5a059;
  --gold-glow: rgba(197, 160, 89, 0.25);
  
  --emerald: #0d9488;
  --emerald-glow: rgba(13, 148, 136, 0.2);
  
  --violet: #6b21a8;
  --amber: #d97706;
  
  --text-main: #1c1917;      /* Warm Charcoal / Slate Deep */
  --text-muted: #44403c;     /* Muted Charcoal Text */
  --text-dim: #78716c;       /* Warm Gray Subtext */
  
  --gradient-primary: linear-gradient(135deg, #b8860b 0%, #d4af37 50%, #996515 100%);
  --gradient-gold: linear-gradient(135deg, #c5a059 0%, #b8860b 100%);
  --gradient-emerald: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
  --gradient-card: linear-gradient(180deg, #ffffff 0%, #fbf9f5 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(212, 175, 55, 0.12) 0%, rgba(184, 134, 11, 0.03) 60%, transparent 80%);

  /* Typography */
  --font-serif: 'Playfair Display', 'Cinzel', serif;
  --font-logo: 'Cinzel', serif;
  --font-heading: 'Prompt', 'Kanit', sans-serif;
  --font-body: 'Kanit', sans-serif;
  --font-num: 'Inter', 'Kanit', sans-serif;

  /* Layout & Spacing */
  --container-max: 1240px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: light;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Background Glow */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 800px;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

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

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

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

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

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

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

.text-emerald {
  color: var(--emerald);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  background: #fff;
  border: 1px solid var(--border-glow);
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(184, 134, 11, 0.08);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-secondary {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.btn-emerald {
  background: var(--gradient-emerald);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 20px var(--emerald-glow);
}

.btn-emerald:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--emerald-glow);
}

.section-tag {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.2rem;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 680px;
}

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

.center-block {
  margin-left: auto;
  margin-right: auto;
}

/* Glass & Warm Card */
.glass-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(68, 64, 60, 0.05);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 15px 40px rgba(184, 134, 11, 0.12);
}

/* ==========================================================================
   Header & Navigation (Logo Monogram MM Serif)
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.header.scrolled {
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
}

/* Elegant Serif MM Logo Icon */
.logo-serif {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #ffffff 0%, #f5f0eb 100%);
  border: 1.5px solid var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-logo);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -1px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  box-shadow: 0 4px 15px rgba(184, 134, 11, 0.15);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-main);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 5rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.18;
  margin: 1.2rem 0;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-dim);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-preview {
  position: relative;
}

.mockup-container {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 10px;
  background: #ffffff;
  border: 1px solid var(--border-glow);
  box-shadow: 0 20px 50px rgba(184, 134, 11, 0.12), 0 5px 15px rgba(0, 0, 0, 0.05);
}

.mockup-header {
  height: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background: var(--bg-card);
  border-top-left-radius: 14px;
  border-top-right-radius: 14px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.mockup-body {
  position: relative;
  overflow: hidden;
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 14px;
}

.mockup-img {
  width: 100%;
  height: auto;
  border-radius: 0 0 10px 10px;
  transition: transform 0.5s ease;
}

.mockup-container:hover .mockup-img {
  transform: scale(1.02);
}

.floating-badge {
  position: absolute;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  box-shadow: 0 10px 25px rgba(184, 134, 11, 0.12);
  z-index: 10;
}

.badge-top-right {
  top: -20px;
  right: -20px;
}

.badge-bottom-left {
  bottom: -20px;
  left: -20px;
}

.float-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(184, 134, 11, 0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.float-text h4 {
  font-size: 0.875rem;
  font-family: var(--font-heading);
  color: var(--text-main);
}

.float-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Metrics Bar
   ========================================================================== */

.metrics-section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: #ffffff;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.metric-item h3 {
  font-family: var(--font-num);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-item p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* ==========================================================================
   Resistance Breaker / Comparison Matrix
   ========================================================================== */

.resistance-section {
  padding: 6rem 0;
  position: relative;
}

.comparison-table-wrapper {
  margin-top: 3rem;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.comparison-table th, 
.comparison-table td {
  padding: 1.25rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: var(--bg-card);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.comparison-table th.highlight-col {
  background: rgba(184, 134, 11, 0.1);
  border-top: 3px solid var(--primary);
  color: var(--text-main);
}

.comparison-table td.highlight-col {
  background: rgba(184, 134, 11, 0.03);
  font-weight: 500;
}

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

.check-icon {
  color: var(--emerald);
  font-size: 1.2rem;
  margin-right: 0.4rem;
}

.cross-icon {
  color: #dc2626;
  font-size: 1.2rem;
  margin-right: 0.4rem;
}

/* ==========================================================================
   Feature Modules Showcase
   ========================================================================== */

.features-section {
  padding: 6rem 0;
  background: #ffffff;
  position: relative;
}

.feature-tabs {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  margin-bottom: 3.5rem;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

.tab-btn.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.feature-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.feature-info h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.feature-info p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 1.8rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-list-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
}

.feature-list-item i {
  color: var(--emerald);
  font-size: 1.25rem;
  margin-top: 0.2rem;
}

.feature-gallery {
  position: relative;
}

.gallery-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: 0 15px 35px rgba(184, 134, 11, 0.1);
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.gallery-card:hover {
  transform: scale(1.02);
}

/* ==========================================================================
   ROI & Cost Savings Calculator
   ========================================================================== */

.calculator-section {
  padding: 6rem 0;
  position: relative;
}

.calculator-card {
  padding: 3.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.calc-input-group {
  margin-bottom: 2rem;
}

.calc-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

.calc-val {
  color: var(--primary);
  font-family: var(--font-num);
  font-weight: 700;
}

.slider-input {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--bg-card-hover);
  outline: none;
  accent-color: var(--primary);
}

.calc-result-box {
  background: #ffffff;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 10px 30px rgba(184, 134, 11, 0.08);
}

.calc-result-box h4 {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.savings-amount {
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--emerald);
  margin-bottom: 0.5rem;
}

.savings-subtitle {
  font-size: 0.95rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Screenshot Gallery Grid
   ========================================================================== */

.gallery-section {
  padding: 6rem 0;
  background: #ffffff;
}

.screens-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.screen-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
}

.screen-item:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 30px rgba(184, 134, 11, 0.12);
}

.screen-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
}

.screen-caption {
  padding: 1rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  color: var(--text-main);
  background: var(--bg-card);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */

.faq-section {
  padding: 6rem 0;
}

.faq-grid {
  max-width: 840px;
  margin: 3rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: border-color var(--transition-fast);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.faq-item.active {
  border-color: var(--accent-gold);
}

.faq-header {
  width: 100%;
  padding: 1.4rem 1.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform var(--transition-normal);
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.8rem;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.faq-item.active .faq-body {
  max-height: 300px;
  padding: 0 1.8rem 1.5rem;
}

/* ==========================================================================
   Final CTA Banner
   ========================================================================== */

.cta-section {
  padding: 6rem 0;
}

.cta-box {
  background: linear-gradient(135deg, #ffffff 0%, #f5f0eb 100%);
  border: 1.5px solid var(--accent-gold);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(184, 134, 11, 0.12);
}

.cta-box h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.cta-box p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-dim);
  background: #ffffff;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* Modal Lightbox */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(28, 25, 23, 0.85);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  max-width: 90%;
  max-height: 90%;
  position: relative;
}

.modal-content img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glow);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid,
  .feature-display,
  .calculator-card {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .nav-menu {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .screens-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .metrics-grid,
  .screens-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn {
    width: 100%;
  }
}