/* ============================
   EASYBILLR — Design System
   ============================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0a12;
  --bg-surface: #12121e;
  --bg-card: #16162a;
  --accent: #6c63ff;
  --accent-glow: rgba(108, 99, 255, 0.3);
  --accent-light: #8b85ff;
  --accent-dark: #4a44cc;
  --green: #3ecf8e;
  --text-primary: #e8e8f4;
  --text-muted: #7a7a9a;
  --text-faint: #44445a;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(108, 99, 255, 0.3);
  --glass-bg: rgba(22, 22, 42, 0.7);
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-dark); border-radius: 3px; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: 1.25rem; font-weight: 700; }
p { color: var(--text-muted); font-size: 1.05rem; }

/* --- Utility --- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.highlight { color: var(--accent); }
.gradient-text {
  background: linear-gradient(135deg, #fff 30%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(108, 99, 255, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--accent-light);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
}

.badge::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 0 30px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(108, 99, 255, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.15);
}

.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 1px solid var(--border-accent);
}
.btn-outline:hover {
  background: var(--accent-glow);
}

/* ============================
   NAVBAR
   ============================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 8px;
  font-size: 1rem;
}

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

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }

.nav-cta { display: flex; align-items: center; gap: 12px; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================
   HERO
   ============================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(108, 99, 255, 0.25) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(62, 207, 142, 0.07) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 99, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 99, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { position: relative; z-index: 1; }

.hero-content h1 { margin-bottom: 20px; }

.hero-content p {
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-form {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.hero-form input {
  flex: 1;
  padding: 14px 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: var(--transition);
}
.hero-form input:focus { border-color: var(--accent); background: rgba(108,99,255,0.08); }
.hero-form input::placeholder { color: var(--text-muted); }

.hero-note {
  font-size: 0.82rem;
  color: var(--text-faint);
}

.hero-visual { position: relative; z-index: 1; }

.app-mockup {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow), 0 0 80px rgba(108, 99, 255, 0.12);
  position: relative;
  overflow: hidden;
}

.app-mockup::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.mockup-dots { display: flex; gap: 6px; }
.mockup-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.mockup-dots span:nth-child(1) { background: #ff5f57; }
.mockup-dots span:nth-child(2) { background: #febc2e; }
.mockup-dots span:nth-child(3) { background: #28c840; }

.mockup-title {
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 600;
}

.mockup-invoice {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 14px;
}

.invoice-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.invoice-from { font-size: 0.8rem; }
.invoice-from strong { display: block; color: var(--text-primary); font-size: 0.95rem; margin-bottom: 2px; }
.invoice-from span { color: var(--text-muted); font-size: 0.78rem; }

.invoice-badge {
  background: rgba(62, 207, 142, 0.12);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid rgba(62, 207, 142, 0.2);
}

.invoice-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.invoice-item:last-child { border-bottom: none; }
.invoice-item .label { color: var(--text-muted); }
.invoice-item .amount { color: var(--text-primary); font-weight: 600; }
.invoice-item.total .amount { color: var(--green); font-size: 1rem; }

.mockup-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

.stat-label { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 6px; }
.stat-value { font-size: 1.3rem; font-weight: 800; color: var(--text-primary); }
.stat-value.green { color: var(--green); }
.stat-sub { font-size: 0.7rem; color: var(--text-faint); margin-top: 2px;}

/* ============================
   SECTIONS COMMON
   ============================ */
section { padding: 100px 0; }

.section-label {
  display: block;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.section-title { text-align: center; margin-bottom: 16px; }
.section-desc { text-align: center; max-width: 520px; margin: 0 auto 60px; font-size: 1.05rem; }

/* ============================
   FEATURES
   ============================ */
.features { background: var(--bg-surface); }

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 30px var(--accent-glow);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: rgba(108, 99, 255, 0.12);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.feature-card h3 { margin-bottom: 10px; position: relative; z-index: 1; }
.feature-card p { font-size: 0.95rem; position: relative; z-index: 1; }

/* ============================
   HOW IT WORKS
   ============================ */
.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  margin-top: 20px;
}

.step {
  text-align: center;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.step:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.step-number {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0 auto 16px;
  box-shadow: 0 0 20px var(--accent-glow);
}

.step h3 { margin-bottom: 8px; }
.step p { font-size: 0.88rem; }

.step-arrow {
  color: var(--text-faint);
  font-size: 1.5rem;
}

/* ============================
   PRICING
   ============================ */
.pricing { background: var(--bg-surface); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
}

.pricing-card.popular {
  border-color: var(--accent);
  box-shadow: 0 0 60px var(--accent-glow);
  transform: scale(1.04);
}

.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-name {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}
.plan-price .currency { font-size: 1.2rem; color: var(--text-muted); font-weight: 700; }
.plan-price .amount { font-size: 3rem; font-weight: 900; color: var(--text-primary); letter-spacing: -0.03em; }
.plan-price .period { font-size: 0.9rem; color: var(--text-muted); }

.plan-desc { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 28px; }

.plan-features { list-style: none; margin-bottom: 32px; }
.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.plan-features li:last-child { border-bottom: none; }
.plan-features li .check { color: var(--green); font-size: 0.85rem; }

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.stars { color: #f5c518; font-size: 0.9rem; margin-bottom: 16px; letter-spacing: 2px; }

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author { display: flex; align-items: center; gap: 12px; }

.author-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
}

.author-name { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); }
.author-role { font-size: 0.78rem; color: var(--text-muted); }

/* ============================
   FINAL CTA
   ============================ */
.final-cta {
  background: var(--bg-primary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 50% 50%, rgba(108, 99, 255, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta .container { position: relative; z-index: 1; }
.final-cta h2 { margin-bottom: 16px; }
.final-cta p { margin-bottom: 40px; font-size: 1.1rem; }

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto 16px;
}

.cta-form input {
  flex: 1;
  padding: 15px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: var(--transition);
}
.cta-form input:focus { border-color: var(--accent); }
.cta-form input::placeholder { color: var(--text-muted); }

.cta-note { font-size: 0.82rem; color: var(--text-faint); }

/* ============================
   FOOTER
   ============================ */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-logo span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 6px;
  font-size: 0.85rem;
}

.footer-links { display: flex; gap: 28px; }
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text-primary); }

.footer-social { display: flex; gap: 12px; }
.social-btn {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}
.social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-faint); }

/* ============================
   SUCCESS TOAST
   ============================ */
.toast {
  position: fixed;
  bottom: 32px; right: 32px;
  background: var(--bg-card);
  border: 1px solid var(--green);
  border-radius: 12px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 20px rgba(62,207,142,0.2);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  z-index: 9999;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast-icon { font-size: 1.2rem; }
.toast-text strong { display: block; color: var(--text-primary); font-size: 0.9rem; }
.toast-text span { font-size: 0.8rem; color: var(--text-muted); }

/* ============================
   SCROLL REVEAL
   ============================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ============================
   MOBILE NAV
   ============================ */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    font-size: 1.3rem;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-cta .btn-ghost { display: none; }

  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-form { flex-direction: column; }

  .features-grid,
  .testimonials-grid,
  .pricing-grid { grid-template-columns: 1fr; }

  .pricing-card.popular { transform: scale(1); }

  .steps { grid-template-columns: 1fr; }
  .step-arrow { display: none; }

  .footer-inner { flex-direction: column; gap: 20px; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }

  .cta-form { flex-direction: column; }
  .toast { left: 16px; right: 16px; bottom: 16px; }
}