/* ========== RESET & BASE ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #1a1a2e;
  line-height: 1.6;
  background: #fff;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ========== VARIABLES ========== */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --accent: #00cec9;
  --accent-dark: #00b5b0;
  --dark: #1a1a2e;
  --gray-900: #2d2d44;
  --gray-700: #4a4a68;
  --gray-500: #7c7c9a;
  --gray-300: #b8b8d0;
  --gray-100: #f0f0f8;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #6c5ce7 0%, #00cec9 100%);
  --gradient-soft: linear-gradient(135deg, rgba(108,92,231,0.08) 0%, rgba(0,206,201,0.08) 100%);
  --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
  --shadow-md: 0 4px 24px rgba(26,26,46,0.1);
  --shadow-lg: 0 12px 48px rgba(26,26,46,0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --container: 1200px;
}

/* ========== UTILITIES ========== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-alt { background: var(--gray-100); }
.section-dark { background: var(--dark); color: var(--white); }
.text-center { text-align: center; }
.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.badge-primary { background: rgba(108,92,231,0.1); color: var(--primary); }
.badge-accent { background: rgba(0,206,201,0.1); color: var(--accent-dark); }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(108,92,231,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(108,92,231,0.45);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-sm { padding: 10px 24px; font-size: 0.9rem; }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }

/* ========== HEADER / NAV ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
}
.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-cta { display: flex; gap: 12px; align-items: center; }
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark);
}

/* ========== HERO ========== */
.hero {
  padding: 140px 0 100px;
  background: var(--gradient-soft);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(108,92,231,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,206,201,0.06) 0%, transparent 70%);
  border-radius: 50%;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
}
.hero-content p {
  font-size: 1.2rem;
  color: var(--gray-700);
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}
.hero-stat h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}
.hero-stat p {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 0;
}
.hero-visual {
  position: relative;
}
.hero-mockup {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  position: relative;
}
.mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}
.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.mockup-dot.red { background: #ff6b6b; }
.mockup-dot.yellow { background: #ffd93d; }
.mockup-dot.green { background: #6bcb77; }
.mockup-body {
  display: grid;
  gap: 12px;
}
.mockup-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  background: var(--gray-100);
  border-radius: 8px;
  font-size: 0.85rem;
  align-items: center;
}
.mockup-row.header-row {
  background: var(--dark);
  color: var(--white);
  font-weight: 600;
}
.status-badge {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
}
.status-stamped { background: #d4edda; color: #155724; }
.status-draft { background: #fff3cd; color: #856404; }
.status-sent { background: #cce5ff; color: #004085; }
.status-cancelled { background: #f8d7da; color: #721c24; }

/* ========== FEATURES ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  transition: all 0.3s ease;
  border: 1px solid rgba(0,0,0,0.05);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.feature-icon.purple { background: rgba(108,92,231,0.1); }
.feature-icon.teal { background: rgba(0,206,201,0.1); }
.feature-icon.pink { background: rgba(253,121,168,0.1); }
.feature-icon.orange { background: rgba(253,203,110,0.1); }
.feature-icon.blue { background: rgba(116,185,255,0.1); }
.feature-icon.green { background: rgba(85,239,196,0.1); }
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  color: var(--gray-500);
  font-size: 0.95rem;
}

/* ========== HOW IT WORKS ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 60px;
}
.step {
  text-align: center;
  position: relative;
}
.step::after {
  content: '';
  position: absolute;
  top: 36px;
  right: -16px;
  width: 32px;
  height: 2px;
  background: var(--gray-300);
}
.step:last-child::after { display: none; }
.step-number {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 auto 20px;
}
.step h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step p { color: var(--gray-500); font-size: 0.9rem; }

/* ========== PRICING ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
}
.pricing-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  position: relative;
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.pricing-card.featured .popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: var(--white);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}
.pricing-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}
.pricing-card .price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--gray-500);
}
.pricing-card .price-desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 28px;
}
.pricing-features {
  margin-bottom: 32px;
}
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--gray-700);
}
.pricing-features li .check {
  color: var(--accent);
  font-weight: 700;
}

/* ========== SUCCESS CASES ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 60px;
}
.case-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}
.case-card:hover { box-shadow: var(--shadow-md); }
.case-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.case-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.case-card p { color: var(--gray-500); font-size: 0.95rem; margin-bottom: 16px; }
.case-quote {
  background: var(--gradient-soft);
  border-radius: var(--radius);
  padding: 20px;
  font-style: italic;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-left: 3px solid var(--primary);
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 60px auto 0;
}
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 24px 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--dark);
  text-align: left;
}
.faq-question:hover { color: var(--primary); }
.faq-toggle {
  font-size: 1.5rem;
  transition: transform 0.3s;
  color: var(--primary);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}
.faq-answer p {
  color: var(--gray-700);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========== CTA ========== */
.cta-section {
  background: var(--gradient);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}
.cta-section h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 0.9rem;
  margin-top: 12px;
  color: var(--gray-500);
  max-width: 300px;
}
.footer h4 {
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a {
  font-size: 0.9rem;
  color: var(--gray-500);
  transition: color 0.2s;
}
.footer ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--gray-500);
}
.footer-bottom-links { display: flex; gap: 24px; }

/* ========== SECTION HEADERS ========== */
.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
}
.section-header h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.section-header p {
  color: var(--gray-500);
  font-size: 1.1rem;
}

/* ========== GUIDE PAGE ========== */
.guide-hero {
  padding: 120px 0 60px;
  background: var(--gradient-soft);
}
.guide-hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; }
.guide-hero p { font-size: 1.15rem; color: var(--gray-700); }

.guide-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  padding: 60px 0;
}
.guide-sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}
.guide-sidebar-nav a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--gray-500);
  border-left: 3px solid transparent;
  transition: all 0.2s;
}
.guide-sidebar-nav a:hover,
.guide-sidebar-nav a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background: rgba(108,92,231,0.04);
}
.guide-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 48px 0 16px;
  padding-top: 24px;
}
.guide-content h2:first-child { margin-top: 0; }
.guide-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 28px 0 12px;
}
.guide-content p {
  color: var(--gray-700);
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.8;
}
.guide-content ul, .guide-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}
.guide-content li {
  list-style: disc;
  color: var(--gray-700);
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.guide-content ol li { list-style: decimal; }
.guide-callout {
  background: rgba(108,92,231,0.06);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 24px;
  margin: 24px 0;
}
.guide-callout.warning {
  background: rgba(253,203,110,0.15);
  border-left-color: #fdcb6e;
}
.guide-callout.success {
  background: rgba(0,206,201,0.08);
  border-left-color: var(--accent);
}
.guide-callout p { margin-bottom: 0; }
.guide-callout strong { color: var(--dark); }
code {
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88rem;
  font-family: 'Fira Code', monospace;
}
.guide-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}
.guide-content th, .guide-content td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.guide-content th {
  font-weight: 700;
  background: var(--gray-100);
  color: var(--dark);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-layout { grid-template-columns: 1fr; }
  .guide-sidebar { display: none; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .mobile-toggle { display: block; }
  .hero-content h1 { font-size: 2.2rem; }
  .section { padding: 60px 0; }
  .section-header h2 { font-size: 1.8rem; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step::after { display: none; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .cta-section h2 { font-size: 1.8rem; }
}

/* ========== MOBILE NAV ========== */
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--white);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-700);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.mobile-nav .btn { margin-top: 16px; width: 100%; justify-content: center; }

/* ========== ANIMATIONS ========== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}