/* ==========================================================================
   FINTECHX MODERN SAAS SYSTEM — DESIGN SYSTEM & TOKENS
   ArcAudit AI · ARCFLAME INTERACTIVE PRIVATE LIMITED
   ========================================================================== */

/* Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Spline+Sans+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette */
  --bg-primary: #F8FAFC;
  --bg-card: #FFFFFF;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  
  --accent-emerald: #10B981;
  --accent-emerald-hover: #059669;
  --accent-emerald-tint: rgba(16, 185, 129, 0.06);
  
  --accent-amber: #F59E0B;
  --accent-amber-tint: rgba(245, 158, 11, 0.06);
  
  --accent-red: #EF4444;
  --accent-red-tint: rgba(239, 68, 68, 0.06);
  
  --border-color: rgba(15, 23, 42, 0.08);
  --border-color-focus: rgba(16, 185, 129, 0.4);
  
  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'Spline Sans Mono', monospace;

  /* Layout & Shadows */
  --border-radius: 16px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.02);
  --shadow-md: 0 12px 30px -10px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 24px 60px -15px rgba(15, 23, 42, 0.1);
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --header-height: 80px;
}

/* Custom Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  position: relative;
}

/* Background Grid Pattern */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(var(--border-color) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: -2;
}

/* Soft Radial Glows */
.radial-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1400px;
  height: 600px;
  background: radial-gradient(circle at top, rgba(16, 185, 129, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

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

.mono {
  font-family: var(--font-mono);
  font-size: 0.8em;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.currency {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Main Layout & Sections */
section {
  padding: clamp(5rem, 8vw, 8rem) 0;
  position: relative;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 991px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Header & Navigation */
header {
  height: var(--header-height);
  background-color: rgba(248, 250, 252, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

header.scrolled {
  height: 65px;
}

.nav-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-emerald-hover) 100%);
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

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

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  border-radius: var(--border-radius);
  width: 290px;
  padding: 0.75rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1001;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-link {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  transition: var(--transition);
}

.dropdown-link:hover {
  background-color: var(--bg-primary);
}

.dropdown-link-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.dropdown-link-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 24px;
  height: 24px;
  position: relative;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  transition: var(--transition);
}

.mobile-menu-btn span:nth-child(1) { top: 6px; }
.mobile-menu-btn span:nth-child(2) { top: 12px; }
.mobile-menu-btn span:nth-child(3) { top: 18px; }

@media (max-width: 991px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    align-items: flex-start;
    transform: translateY(-120%);
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
  }
  
  .nav-links.open {
    transform: translateY(0);
  }
  
  .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    border: none;
    box-shadow: none;
    width: 100%;
    padding: 0 0 0 1rem;
    background: transparent;
  }
  
  .nav-cta {
    display: none;
  }
}

/* Buttons UI */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--text-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-primary);
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-emerald {
  background: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-emerald-hover) 100%);
  color: #FFFFFF;
}

.btn-emerald:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

/* Cards & Containers */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(15, 23, 42, 0.15);
}

/* Glow Accent Cards */
.glow-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: var(--border-radius);
  background: radial-gradient(800px circle at var(--x, 0px) var(--y, 0px), rgba(16, 185, 129, 0.08), transparent 40%);
  pointer-events: none;
  z-index: 1;
}

/* Badges / Chips */
.badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge-emerald {
  color: var(--accent-emerald);
  background-color: var(--accent-emerald-tint);
}

.badge-amber {
  color: var(--accent-amber);
  background-color: var(--accent-amber-tint);
}

.badge-red {
  color: var(--accent-red);
  background-color: var(--accent-red-tint);
}

/* Stat Large counters */
.stat-large {
  font-size: clamp(3rem, 6vw, 4rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Marquee / Loop Banner */
.marquee-container {
  overflow: hidden;
  white-space: nowrap;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  background-color: var(--bg-card);
}

.marquee-content {
  display: inline-block;
  animation: marquee 25s linear infinite;
}

.marquee-content span {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 4rem;
  display: inline-flex;
  align-items: center;
}

.marquee-content span::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  margin-left: 4rem;
}

@keyframes marquee {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-100%, 0, 0); }
}

/* Tabs UI */
.tabs-nav {
  display: flex;
  gap: 0.5rem;
  background-color: rgba(15, 23, 42, 0.03);
  padding: 0.35rem;
  border-radius: 12px;
  width: fit-content;
  margin: 0 auto 3rem;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
}

.tab-btn.active {
  background-color: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: tabFadeIn 0.3s ease forwards;
}

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Accordion FAQ */
.accordion-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: var(--transition);
}

.accordion-item:hover {
  border-color: rgba(15, 23, 42, 0.15);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  padding: 1.5rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
}

.accordion-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
  color: var(--text-secondary);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 1.5rem;
}

.accordion-content p {
  padding-bottom: 1.5rem;
  margin-bottom: 0;
}

.accordion-item.active .accordion-content {
  max-height: 300px;
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
  background-color: var(--text-primary);
  color: #FFFFFF;
}

/* Calculator Specific UI */
.calculator-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
}

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

.calc-label-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.calc-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.calc-value-bubble {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-emerald);
}

.slider-input {
  width: 100%;
  accent-color: var(--accent-emerald);
  height: 6px;
  background-color: rgba(15, 23, 42, 0.05);
  border-radius: 10px;
  outline: none;
}

.calc-outputs {
  background-color: var(--text-primary);
  color: #FFFFFF;
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
}

.calc-output-row {
  display: flex;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.calc-output-label {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.calc-output-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
}

.calc-output-value.large {
  font-size: 2rem;
  color: var(--accent-emerald);
  font-family: var(--font-sans);
  font-weight: 800;
}

/* Tables */
.ledger-grid {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.ledger-grid th, .ledger-grid td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.ledger-grid th {
  background-color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Footer Section */
footer {
  background-color: var(--text-primary);
  color: #FFFFFF;
  padding: 6rem 0 3rem;
}

footer p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
}

footer a {
  color: rgba(255, 255, 255, 0.6);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.footer-brand h4 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-title {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #FFFFFF;
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-legal-card {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 1.5rem;
}

.footer-legal-card p {
  font-size: 0.8rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
  max-width: 600px;
  line-height: 1.4;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}