/* ==========================================================================
   PREXtop — Official Product Landing Page Styles
   Brand Identity: Navy (#131337), Mint (#54FCBF), Crisp High-End Dark & Light UI
   ========================================================================== */

:root {
  --bg-primary: #0b0d19;
  --bg-surface: #131728;
  --bg-surface-elevated: #1a1f36;
  --bg-card: rgba(26, 31, 54, 0.7);
  --bg-card-hover: rgba(35, 42, 73, 0.85);

  --brand-navy: #131337;
  --brand-navy-light: #1c1c4e;
  --brand-mint: #54FCBF;
  --brand-mint-glow: rgba(84, 252, 191, 0.25);
  --brand-mint-hover: #3de8a8;
  --brand-cyan: #38bdf8;
  --brand-purple: #818cf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-on-mint: #0a1e16;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-mint: rgba(84, 252, 191, 0.3);
  --border-focus: rgba(84, 252, 191, 0.6);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px var(--brand-mint-glow);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.7);

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(84, 252, 191, 0.12), transparent),
    radial-gradient(circle 600px at 90% 20%, rgba(56, 189, 248, 0.06), transparent),
    radial-gradient(circle 500px at 10% 80%, rgba(129, 140, 248, 0.05), transparent),
    var(--bg-primary);
  min-height: 100vh;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(11, 13, 25, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo-img {
  height: 34px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-nav-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-mint);
  color: var(--text-on-mint);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition-fast);
  box-shadow: 0 2px 10px rgba(84, 252, 191, 0.2);
}

.btn-nav-download:hover {
  background: var(--brand-mint-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(84, 252, 191, 0.35);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 90px 0 70px;
  position: relative;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(84, 252, 191, 0.08);
  border: 1px solid var(--border-mint);
  color: var(--brand-mint);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-mint);
  box-shadow: 0 0 10px var(--brand-mint);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: #ffffff;
}

.hero-title-gradient {
  background: linear-gradient(135deg, #ffffff 30%, var(--brand-mint) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--brand-mint) 0%, #35deb0 100%);
  color: var(--text-on-mint);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 16px 34px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(84, 252, 191, 0.35);
  transition: var(--transition-smooth);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(84, 252, 191, 0.5);
  background: linear-gradient(135deg, #65fed0 0%, #46ebbc 100%);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 1.02rem;
  font-weight: 600;
  padding: 15px 28px;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.hero-meta-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-item svg {
  color: var(--brand-mint);
}

/* ==========================================================================
   APP SHOWCASE MOCKUP
   ========================================================================== */
.showcase-wrapper {
  margin: 60px auto 0;
  max-width: 1040px;
  perspective: 1000px;
}

.app-window {
  background: #111424;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(84, 252, 191, 0.25);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 50px rgba(84, 252, 191, 0.15);
  overflow: hidden;
  text-align: left;
}

.app-titlebar {
  background: #0d0f1b;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  gap: 8px;
}

.window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #eab308; }
.dot-green { background: #22c55e; }

.window-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.window-title img {
  height: 16px;
  width: auto;
}

.window-actions {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.app-body {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 480px;
}

.app-sidebar {
  background: #0f1220;
  border-right: 1px solid var(--border-subtle);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sidebar-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.layout-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.layout-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
}

.layout-item.active {
  background: rgba(84, 252, 191, 0.08);
  border-color: var(--border-mint);
}

.layout-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.layout-badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(84, 252, 191, 0.2);
  color: var(--brand-mint);
  font-family: var(--font-mono);
}

.sidebar-status {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-mint);
}

.app-main {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: radial-gradient(circle at 50% 50%, #161a2e, #111424);
}

.preview-screen {
  background: #090b14;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  height: 280px;
  overflow: hidden;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.desktop-grid-lines {
  position: absolute;
  inset: 0;
  background-size: 32px 32px;
  background-image: 
    linear-gradient(to right, rgba(84, 252, 191, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(84, 252, 191, 0.04) 1px, transparent 1px);
}

.preview-icons-layer {
  position: absolute;
  inset: 16px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 12px;
}

.mock-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  position: relative;
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
}

.mock-icon.pinned {
  border-color: var(--brand-mint);
  box-shadow: 0 0 10px var(--brand-mint-glow);
}

.mock-icon-label {
  position: absolute;
  bottom: -14px;
  font-size: 9px;
  white-space: nowrap;
  color: var(--text-muted);
}

.preview-hud {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(13, 17, 33, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-mint);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--brand-mint);
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  gap: 16px;
}

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

.control-buttons {
  display: flex;
  gap: 12px;
}

.btn-app-action {
  background: var(--brand-mint);
  color: var(--text-on-mint);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(84, 252, 191, 0.3);
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-app-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

/* ==========================================================================
   PAIN POINTS / PROBLEM VS SOLUTION
   ========================================================================== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-mint);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.problem-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition-smooth);
}

.problem-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
  background: var(--bg-surface-elevated);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--brand-mint);
}

.problem-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   FEATURES DETAILED
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition-smooth);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.feature-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand-mint), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-box:hover {
  border-color: var(--border-mint);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.feature-box:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(84, 252, 191, 0.08);
  border: 1px solid var(--border-mint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   PRICING / TIERS
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #18203c 0%, #12162a 100%);
  border: 2px solid var(--brand-mint);
  box-shadow: var(--shadow-glow), 0 20px 40px -10px rgba(0, 0, 0, 0.6);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-mint);
  color: var(--text-on-mint);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
}

.pricing-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.pricing-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 42px;
}

.pricing-price {
  margin: 28px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.price-currency {
  font-size: 1rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
}

.pricing-features li svg {
  color: var(--brand-mint);
  flex-shrink: 0;
}

.btn-pricing {
  width: 100%;
  text-align: center;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition-fast);
  cursor: pointer;
  display: block;
}

.btn-pricing-free {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border: 1px solid var(--border-subtle);
}

.btn-pricing-free:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-pricing-pro {
  background: var(--brand-mint);
  color: var(--text-on-mint);
  box-shadow: 0 4px 16px rgba(84, 252, 191, 0.35);
}

.btn-pricing-pro:hover {
  background: var(--brand-mint-hover);
  transform: translateY(-1px);
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
  color: var(--brand-mint);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: #090a14;
  padding: 60px 0 30px;
  color: var(--text-muted);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-link {
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--brand-mint);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .app-body {
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .pricing-card.featured {
    transform: none;
  }
}