/* ==========================================================================
   SURELOGS MARKETPLACE - GLOBAL & LANDING STYLES (V1)
   ========================================================================== */

:root {
  /* Color Palette - Deep Navy / Sharp Modern Scheme */
  --bg-primary: #0a0d14;
  --bg-secondary: #121722;
  --bg-surface: #182030;
  --bg-surface-hover: #202b40;
  
  --border-subtle: #232d42;
  --border-strong: #344463;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-light: #60a5fa;

  --status-success: #10b981;
  --status-warning: #f59e0b;
  --status-danger: #ef4444;

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Prevent body scrolling when mobile overlay is active */
body.menu-open {
  overflow: hidden;
}

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

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

button, input {
  font-family: inherit;
  font-size: inherit;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.2;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn .btn-icon {
  flex-shrink: 0;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-blue-hover);
}

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

.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent-light);
  cursor: pointer;
  padding: 0;
  font-size: 0.9rem;
  text-decoration: underline;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 13, 20, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-text {
  color: var(--text-primary);
}

.logo-badge {
  background-color: var(--bg-surface);
  color: var(--accent-light);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.4rem;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
}

.main-nav {
  display: flex;
  align-items: center;
}

.mobile-nav-header {
  display: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

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

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

.nav-cta-mobile {
  display: none;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  position: relative;
  width: 36px;
  height: 36px;
  z-index: 1001;
}

.mobile-toggle:focus-visible {
  outline: 2px solid var(--accent-light);
  border-radius: var(--radius-sm);
}

.hamburger-bar {
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-fast);
  transform-origin: center;
}

/* Transform Hamburger into X when menu is active */
.mobile-toggle.active .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent-light);
  border-radius: 50%;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card-abstract {
  width: 100%;
  max-width: 400px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.abstract-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.25rem;
}

.abstract-status {
  width: 8px;
  height: 8px;
  background-color: var(--status-success);
  border-radius: 50%;
}

.abstract-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.abstract-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pipeline-step {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  background-color: var(--bg-surface);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.pipeline-step.highlight {
  border-color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.1);
}

.step-icon {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--accent-light);
  background-color: var(--bg-primary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.step-text {
  font-size: 0.875rem;
  font-weight: 500;
}

.pipeline-connector {
  width: 2px;
  height: 10px;
  background-color: var(--border-strong);
  margin-left: 1.5rem;
}

.abstract-footer {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.security-tag {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Trust Strip */
.trust-strip {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.5rem 0;
}

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

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.trust-icon {
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface);
  padding: 0.6rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.trust-text {
  display: flex;
  flex-direction: column;
}

.trust-text strong {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Sections General */
.section-padding {
  padding: 5rem 0;
}

.bg-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-header.text-center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section-subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 0.5rem;
  max-width: 560px;
}

.link-arrow {
  color: var(--accent-light);
  font-size: 0.9rem;
  font-weight: 600;
}

.link-arrow:hover {
  text-decoration: underline;
}

/* How It Works Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.step-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.step-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.step-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Featured Categories */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.category-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.category-card:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--accent-blue);
  transform: translateY(-3px);
}

.category-icon {
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.category-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.category-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.category-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-light);
}

/* Support Box */
.support-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.support-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.support-desc {
  color: var(--text-secondary);
  max-width: 580px;
}

.support-action-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  background-color: #07090e;
  border-top: 1px solid var(--border-subtle);
  padding-top: 4rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 1rem;
  max-width: 360px;
}

.footer-heading {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 1.5rem 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-security-note {
  color: var(--text-secondary);
}

/* Floating Controls (Support + Back to Top) */
.floating-controls {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

.floating-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  border: 1px solid var(--border-strong);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: all var(--transition-normal);
  outline: none;
}

.floating-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.5);
}

.floating-btn.telegram-support {
  background-color: #229ED9;
  border-color: #38b0e8;
}

.floating-btn.telegram-support:hover {
  background-color: #1f8ebf;
}

.floating-btn.back-to-top {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.floating-btn.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.floating-btn.back-to-top:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--accent-blue);
  color: var(--accent-light);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-subtitle {
    max-width: 100%;
  }

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

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

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

  .support-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
  }

  .support-action-group {
    width: 100%;
    flex-direction: column;
  }

  .support-action-group .btn {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .btn-desktop-cta {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  /* Full-Screen Mobile Menu Overlay */
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background-color: rgba(10, 13, 20, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem 1.5rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .main-nav.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 320px;
    gap: 2rem;
    margin-bottom: 2.5rem;
    text-align: center;
  }

  .nav-link {
    font-size: 1.35rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-primary);

    &:focus-visible {
      outline: 2px solid var(--accent-light);
      border-radius: var(--radius-sm);
    }
  }

  .nav-cta-mobile {
    display: block;
    width: 100%;
    max-width: 320px;
  }

  .hero-title {
    font-size: 2.15rem;
  }

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

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

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

  .footer-bottom-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .floating-controls {
    bottom: 1.25rem;
    right: 1.25rem;
  }

  .floating-btn {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}