/* ============================================
   FluxoFinance PRO - Landing Page Styles
   Based on BRAND_GUIDE.md
   ============================================ */

/* --- Tailwind CDN + Custom Styles --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* --- CSS Variables --- */
:root {
  --green-dark: #022c22;
  --green-primary: #024d35;
  --green-hover: #023b28;
  --green-gradient-start: #014737;
  --green-gradient-end: #022c22;
  --green-50: #f0fdf4;
  --green-100: #ecfdf5;
  --green-200: #a7f3d0;
  --green-600: #059669;
  --green-700: #065f46;
  --green-800: #065f46;
  --green-900: #064e3b;
  --green-950: #022c22;
  --white: #ffffff;
  --text-primary: #022c22;
  --text-secondary: rgba(6, 95, 70, 0.6);
  --text-tertiary: rgba(6, 95, 70, 0.4);
  --shadow-card: 0 20px 25px -5px rgba(2, 44, 34, 0.05);
  --shadow-card-hover: 0 20px 25px -5px rgba(2, 44, 34, 0.1);
  --shadow-button: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-hero: 0 20px 25px -5px rgba(2, 44, 34, 0.2);
  --radius-button: 16px;
  --radius-card: 24px;
  --radius-card-md: 16px;
  --radius-input: 12px;
  --radius-badge: 6px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  background-color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul {
  list-style: none;
}

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

.section {
  padding: 96px 0;
}

.section-light {
  background-color: var(--green-50);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.2;
}

.text-gradient {
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius-button);
  font-size: 1rem;
  padding: 14px 28px;
  line-height: 1;
}

.btn-primary {
  background-color: var(--green-primary);
  color: var(--white);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  background-color: var(--green-hover);
  transform: translateY(-2px);
  box-shadow: 0 15px 20px -5px rgba(2, 77, 53, 0.3);
}

.btn-white {
  background-color: var(--white);
  color: var(--green-primary);
  box-shadow: var(--shadow-button);
}

.btn-white:hover {
  background-color: var(--green-50);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: var(--green-primary);
  border: 2px solid var(--green-200);
}

.btn-outline:hover {
  background-color: var(--green-50);
  border-color: var(--green-primary);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
}

/* --- Header / Nav --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--green-100);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(2, 44, 34, 0.08);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--green-700);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--green-primary);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--green-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--green-primary);
}

/* --- Hero Section --- */
.hero {
  padding: 160px 0 96px;
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
  border-radius: 50%;
}

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

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  border-radius: var(--radius-badge);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: fit-content;
  color: var(--green-200);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero h1 span {
  color: #6ee7b7;
}

.hero p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 540px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
}

.hero-stat span {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 520px;
}

.hero-mockup {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-floating-card {
  position: absolute;
  background: var(--white);
  border-radius: var(--radius-card-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 3s ease-in-out infinite;
}

.hero-floating-card.top-right {
  top: -20px;
  right: -20px;
  animation-delay: 0s;
}

.hero-floating-card.bottom-left {
  bottom: -20px;
  left: -20px;
  animation-delay: 1.5s;
}

.hero-floating-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.hero-floating-card .icon.green {
  background-color: var(--green-100);
  color: var(--green-primary);
}

.hero-floating-card .icon.amber {
  background-color: #fef3c7;
  color: #d97706;
}

.hero-floating-card .info small {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-floating-card .info strong {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--green-100);
  color: var(--green-primary);
  padding: 6px 14px;
  border-radius: var(--radius-badge);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

/* --- Problem / Solution Section --- */
.problem-solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.problem-list, .solution-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.problem-item, .solution-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.problem-item .icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.problem-item .icon.red {
  background-color: #fef2f2;
  color: #dc2626;
}

.solution-item .icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.solution-item .icon.green {
  background-color: var(--green-100);
  color: var(--green-primary);
}

.problem-item h4, .solution-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.problem-item p, .solution-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.feature-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid var(--green-100);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--green-200);
}

.feature-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Demo / Mockups Section --- */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.demo-card {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--green-100);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  background: var(--white);
}

.demo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.demo-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
}

.demo-card-body {
  padding: 20px;
}

.demo-card-body h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.demo-card-body p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

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

.pricing-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  border: 1px solid var(--green-100);
  box-shadow: var(--shadow-card);
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.pricing-card.featured {
  border: 2px solid var(--green-primary);
  box-shadow: 0 20px 40px rgba(2, 77, 53, 0.15);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  color: var(--white);
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card .plan-name {
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--green-600);
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.pricing-card .price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.pricing-card .period {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.pricing-features li .check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--green-100);
  color: var(--green-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.pricing-features li.disabled {
  color: var(--text-tertiary);
}

.pricing-features li.disabled .check {
  background-color: #f3f4f6;
  color: #9ca3af;
}

.pricing-card .btn {
  width: 100%;
}

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

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid var(--green-100);
  box-shadow: var(--shadow-card);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 1rem;
  margin-bottom: 16px;
}

.testimonial-card blockquote {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

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

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 0.875rem;
}

.testimonial-author-info strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
}

.testimonial-author-info span {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- FAQ Section --- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--green-100);
  border-radius: var(--radius-card-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--green-200);
  box-shadow: var(--shadow-card);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: var(--green-50);
}

.faq-question .icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-primary);
  transition: var(--transition);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- CTA Section --- */
.cta {
  background: linear-gradient(135deg, var(--green-gradient-start), var(--green-gradient-end));
  color: var(--white);
  text-align: center;
  padding: 96px 0;
}

.cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 520px;
  margin: 0 auto 32px;
}

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

.cta-form input {
  flex: 1;
  padding: 16px 20px;
  border-radius: var(--radius-input);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.cta-form input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.cta-form input:focus {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

.cta-form .btn {
  flex-shrink: 0;
}

.cta-note {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 16px;
}

/* --- Footer --- */
.footer {
  background-color: var(--green-950);
  color: var(--white);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 36px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 300px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
  font-size: 1.25rem;
}

.footer-social a:hover {
  color: var(--white);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.75rem;
  }
  
  .features-grid,
  .demo-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 24px;
    border-bottom: 1px solid var(--green-100);
    box-shadow: var(--shadow-card);
    gap: 16px;
  }

  .mobile-toggle {
    display: block;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero {
    padding: 120px 0 64px;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-floating-card {
    display: none;
  }

  .problem-solution {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }

  .cta h2 {
    font-size: 1.75rem;
  }

  .cta-form {
    flex-direction: column;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

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

  .hero-stat strong {
    font-size: 1.25rem;
  }
}