/* Instituto Pro Futuro - CSS Unificado */
/* Design Global: Minimalista, Elegante, Acessível */

:root {
  /* Cores */
  --color-coral: #F95C4B;
  --color-coral-dark: #E84C3D;
  --color-black: #1a1a1a;
  --color-stone: #E4DED2;
  --color-paper: #F6F4F1;
  --color-white: #FFFFFF;
  --color-text: #333333;
  --color-text-muted: #555555;
  
  /* Tipografia */
  --font-display: 'Oswald', sans-serif;
  --font-text: 'Open Sans', sans-serif;
  
  /* Tamanhos */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  --font-size-5xl: 3.5rem;
  
  /* Espaçamentos */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 80px;
  
  /* Bordas */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  
  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  /* Transições */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 600ms ease;
}

/* ============================
   RESET & BASE
   ============================ */

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

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

body {
  font-family: var(--font-text);
  background: var(--color-paper);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ============================
   SKIP LINK (Acessibilidade)
   ============================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-coral);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

/* ============================
   FOCUS STYLES (Acessibilidade)
   ============================ */

:focus-visible {
  outline: 3px solid var(--color-coral);
  outline-offset: 3px;
  border-radius: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* ============================
   TIPOGRAFIA
   ============================ */

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

h1 { font-size: clamp(2.5rem, 6vw, var(--font-size-5xl)); }
h2 { font-size: clamp(2rem, 5vw, var(--font-size-4xl)); }
h3 { font-size: clamp(1.5rem, 3vw, var(--font-size-2xl)); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  line-height: 1.8;
  font-weight: 400;
}

.text-muted {
  color: var(--color-text-muted);
}

a {
  color: var(--color-coral);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-coral-dark);
}

/* ============================
   LAYOUT
   ============================ */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.align-center {
  align-items: center;
}

/* ============================
   HEADER (Glassmorphism)
   ============================ */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  padding: var(--spacing-sm) 0;
  transition: all 0.4s ease;
}

header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(228, 222, 210, 0.5);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

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

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.03);
}

.logo img {
  height: 50px;
  width: auto;
}

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

nav a {
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  padding: var(--spacing-xs) var(--spacing-sm);
  position: relative;
  font-family: var(--font-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

header.scrolled nav a {
  color: var(--color-black);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-coral);
  transition: width var(--transition-base);
}

nav a:hover,
nav a.active {
  color: var(--color-coral);
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 6px;
  padding: var(--spacing-sm);
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

header.scrolled .mobile-menu-btn span {
  background: var(--color-black);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================
   HERO SECTION
   ============================ */

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.6) 100%);
}

#fire-canvas {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 250px;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px var(--spacing-lg) var(--spacing-2xl);
}

.hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-content p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-white);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
  opacity: 0.95;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-buttons .btn-secondary {
  color: var(--color-white);
  border-color: var(--color-white);
}

.hero-buttons .btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-black);
}

/* ============================
   SECTIONS
   ============================ */

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

.section-alt {
  background: var(--color-stone);
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  margin-bottom: var(--spacing-sm);
}

.section-title p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ============================
   BUTTONS
   ============================ */

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  font-family: var(--font-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-primary {
  background: var(--color-coral);
  color: var(--color-white);
  border-color: var(--color-coral);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249, 92, 75, 0.35);
  background: var(--color-coral-dark);
  color: var(--color-white);
}

.btn-secondary {
  background: transparent;
  color: var(--color-black);
  border: 2px solid var(--color-black);
}

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

.btn-lg {
  padding: 18px 40px;
  font-size: var(--font-size-base);
}

/* ============================
   CARDS
   ============================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

.card-stat {
  text-align: center;
}

.card-featured {
  border-color: var(--color-coral);
  box-shadow: 0 4px 20px rgba(249, 92, 75, 0.15);
}

.card-icon {
  margin-bottom: var(--spacing-md);
  display: inline-block;
}

.card-icon svg {
  width: 48px;
  height: 48px;
  display: block;
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-black);
  font-family: var(--font-display);
}

.card-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.card-contact {
  display: flex;
  flex-direction: column;
}

.card-contact .btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ============================
   STATS
   ============================ */

.stats-row {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-coral);
  font-family: var(--font-display);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* ============================
   CTA SECTION
   ============================ */

.section-cta {
  background: var(--color-paper);
  border-top: 1px solid var(--color-stone);
  border-bottom: 1px solid var(--color-stone);
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

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

.cta-content p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-muted);
}

/* ============================
   CONTACT GRID
   ============================ */

.contact-grid {
  max-width: 800px;
  margin: 0 auto;
}

/* ============================
   FOOTER
   ============================ */

footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-stone);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--color-black);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  font-family: var(--font-display);
  font-weight: 700;
}

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

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.footer-section a:hover {
  color: var(--color-coral);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-paper);
  border: 1px solid var(--color-stone);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--color-coral);
  border-color: var(--color-coral);
  color: var(--color-white);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.contact-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.contact-info svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-coral);
}

.contact-info a {
  color: var(--color-text-muted);
}

.contact-info a:hover {
  color: var(--color-coral);
}

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

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* ============================
   SCROLL TO TOP
   ============================ */

.scroll-top-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-white);
  color: var(--color-coral);
  border: 1px solid var(--color-stone);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 900;
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--color-coral);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.scroll-top-btn svg {
  width: 24px;
  height: 24px;
}

/* ============================
   ANIMATIONS
   ============================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-on-scroll {
  opacity: 0;
}

/* ============================
   UTILITIES
   ============================ */

.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* ============================
   REDUCED MOTION
   ============================ */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  .animate-on-scroll {
    opacity: 1;
  }
  
  .animate-fade-in-up {
    animation: none;
    opacity: 1;
  }
  
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  #fire-canvas {
    display: none;
  }
}

/* ============================
   RESPONSIVE - TABLET
   ============================ */

@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
  
  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-stone);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  
  nav.active {
    max-height: 350px;
  }
  
  nav ul {
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md);
  }
  
  nav a {
    color: var(--color-black);
    padding: var(--spacing-sm);
    display: block;
  }
  
  nav a::after {
    display: none;
  }
  
  nav a:hover,
  nav a.active {
    color: var(--color-coral);
  }
  
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-content {
    padding: 100px var(--spacing-md) var(--spacing-xl);
  }
  
  #fire-canvas {
    height: 150px;
  }
  
  .stats-row {
    gap: var(--spacing-lg);
  }
  
  .stat-number {
    font-size: var(--font-size-2xl);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .scroll-top-btn {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

/* ============================
   RESPONSIVE - MOBILE
   ============================ */

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .logo img {
    height: 40px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .btn-lg {
    padding: 16px 32px;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .stats-row {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .contact-grid {
    gap: var(--spacing-md);
  }
}