/* ===================================
   SISTEMA SOFTWARE - Design System
   Premium Dark Theme
   =================================== */

/* === CSS Variables === */
:root {
  /* Colors */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a25;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-card-hover: rgba(255, 255, 255, 0.06);

  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.5);

  --color-accent-primary: #f97316;
  --color-accent-secondary: #fb923c;
  --color-accent-gradient: linear-gradient(135deg, #ea580c 0%, #f97316 50%, #fb923c 100%);

  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-accent: rgba(249, 115, 22, 0.5);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', var(--font-primary);

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(249, 115, 22, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

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

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-6xl);
  }

  h2 {
    font-size: var(--text-5xl);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: var(--text-7xl);
  }
}

p {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-secondary);
}

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

section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* === Cards === */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* === Gradient Text === */
.gradient-text {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Header/Nav === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

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

.logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.logo span {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-img {
  height: 32px;
  width: auto;
  vertical-align: middle;
  margin-right: var(--spacing-xs);
}

.nav-links {
  display: none;
  list-style: none;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

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

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 20%, rgba(249, 115, 22, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(251, 146, 60, 0.1) 0%, transparent 50%);
  animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

.hero h1 {
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: var(--text-xl);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

/* === Problem Section === */
.problem {
  background: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.section-header p {
  margin-top: var(--spacing-sm);
}

.problem-grid {
  display: grid;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.problem-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.problem-card .icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-md);
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.problem-card h3 {
  margin-bottom: var(--spacing-sm);
}

/* === Process Section === */
.process-timeline {
  display: grid;
  gap: var(--spacing-lg);
  position: relative;
}

@media (min-width: 768px) {
  .process-timeline {
    grid-template-columns: repeat(4, 1fr);
  }
}

.process-step {
  position: relative;
  padding: var(--spacing-lg);
  text-align: center;
}

.step-number {
  width: 50px;
  height: 50px;
  margin: 0 auto var(--spacing-md);
  background: var(--color-accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  font-weight: 700;
}

.process-step h4 {
  margin-bottom: var(--spacing-xs);
}

.process-step p {
  font-size: var(--text-base);
}

/* === Benefits Section === */
.benefits {
  background: var(--color-bg-secondary);
}

.benefits-grid {
  display: grid;
  gap: var(--spacing-md);
}

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

@media (min-width: 1024px) {
  .benefits-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.benefit-card {
  padding: var(--spacing-xl);
  text-align: center;
}

.benefit-card .icon {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-md);
}

.benefit-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: var(--text-xl);
}

/* === CTA Section === */
.cta-section {
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-tertiary) 100%);
  text-align: center;
}

.cta-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent-gradient);
}

.cta-box h2 {
  margin-bottom: var(--spacing-sm);
}

.cta-box p {
  margin-bottom: var(--spacing-lg);
}

/* === Contact Form === */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 500px;
  margin: 0 auto;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

@media (min-width: 640px) {
  .form-row {
    flex-direction: row;
  }
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent-primary);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form button {
  margin-top: var(--spacing-sm);
}

/* === Footer === */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

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

.footer-bottom {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-bottom .powered-by {
  margin-top: var(--spacing-xs);
}

.footer-bottom .powered-by a {
  color: var(--color-accent-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-bottom .powered-by a:hover {
  color: var(--color-accent-secondary);
}

/* === 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);
}

/* Stagger children */
.stagger-children>* {
  opacity: 0;
  transform: translateY(20px);
}

.stagger-children.visible>*:nth-child(1) {
  transition-delay: 0ms;
}

.stagger-children.visible>*:nth-child(2) {
  transition-delay: 100ms;
}

.stagger-children.visible>*:nth-child(3) {
  transition-delay: 200ms;
}

.stagger-children.visible>*:nth-child(4) {
  transition-delay: 300ms;
}

.stagger-children.visible>* {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}