:root {
  /* Tipografia */
  --font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  
  /* Cores principais */
  --primary: #667eea;
  --primary-dark: #5a67d8;
  --primary-light: #7c3aed;
  --success: #10b981;
  --success-dark: #059669;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --warning: #f59e0b;
  --warning-dark: #d97706;
  
  /* Backgrounds e superfícies */
  --body-bg: #ffffff;
  --body-color: #1f2937;
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --header-bg: rgba(255,255,255,0.95);
  
  /* Textos */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --btn-text: #ffffff;
  --btn-text-alt: #1f2937;
  --text-color: var(--text-primary);
  --bg-color: var(--body-bg);
  
  /* Bordas e divisores */
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  
  /* Estados e interações */
  --table-stripe: #f9fafb;
  --table-hover: #f3f4f6;
  --success-bg: #ecfdf5;
  --danger-bg: #fef2f2;
  --warning-bg: #fffbeb;
  
  /* Gradientes para botões */
  --primary-gradient: linear-gradient(135deg, #667eea, #764ba2);
  --primary-gradient-hover: linear-gradient(135deg, #5a67d8, #6b46c1);
  --success-gradient: linear-gradient(135deg, #10b981, #059669);
  --success-gradient-hover: linear-gradient(135deg, #059669, #047857);
  --danger-gradient: linear-gradient(135deg, #ef4444, #dc2626);
  --danger-gradient-hover: linear-gradient(135deg, #dc2626, #b91c1c);
  --warning-gradient: linear-gradient(135deg, #f59e0b, #d97706);
  --warning-gradient-hover: linear-gradient(135deg, #d97706, #b45309);
  
  /* Sombras */
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --btn-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.1);
  --btn-shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.15);
  
  /* Resultado */
  --result-bg: #f8f9fa;
  
  color-scheme: light;
}

/* Modo escuro */
[data-theme="dark"] {
  /* Tipografia */
  --font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  
  /* Cores principais */
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --primary-light: #a78bfa;
  --success: #34d399;
  --success-dark: #10b981;
  --danger: #f87171;
  --danger-dark: #ef4444;
  --warning: #fbbf24;
  --warning-dark: #f59e0b;
  
  /* Backgrounds e superfícies */
  --body-bg: #000000;
  --body-color: #e2e8f0;
  --card-bg: #1a1a1a;
  --input-bg: #1a1a1a;
  --header-bg: rgba(26, 26, 26, 0.95);
  
  /* Textos */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --btn-text: #ffffff;
  --btn-text-alt: #000000;
  --text-color: var(--text-primary);
  --bg-color: var(--body-bg);
  
  /* Bordas e divisores */
  --border-color: #333333;
  --border-light: #444444;
  
  /* Estados e interações */
  --table-stripe: #1a1a1a;
  --table-hover: #333333;
  --success-bg: #064e3b;
  --danger-bg: #7f1d1d;
  --warning-bg: #78350f;
  
  /* Gradientes para botões */
  --primary-gradient: linear-gradient(135deg, #818cf8, #a78bfa);
  --primary-gradient-hover: linear-gradient(135deg, #6366f1, #8b5cf6);
  --success-gradient: linear-gradient(135deg, #34d399, #10b981);
  --success-gradient-hover: linear-gradient(135deg, #10b981, #059669);
  --danger-gradient: linear-gradient(135deg, #f87171, #ef4444);
  --danger-gradient-hover: linear-gradient(135deg, #ef4444, #dc2626);
  --warning-gradient: linear-gradient(135deg, #fbbf24, #f59e0b);
  --warning-gradient-hover: linear-gradient(135deg, #f59e0b, #d97706);
  
  /* Sombras */
  --card-shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.05);
  --btn-shadow: 0 4px 14px 0 rgba(255, 255, 255, 0.1);
  --btn-shadow-hover: 0 6px 20px rgba(255, 255, 255, 0.15);
  
  /* Resultado */
  --result-bg: #1a1a1a;
  
  color-scheme: dark;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--body-bg);
  color: var(--body-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  max-width: 400px;
  width: 100%;
  height: auto;
  transition: opacity 0.3s ease;
}

.logo-header {
  text-align: center;
  margin-bottom: 30px;
  padding: 20px 0;
}

.logo-header .logo {
  max-width: 200px;
  width: 100%;
  height: auto;
}

h1 {
  font-size: 2rem;
  margin: 20px 0;
  text-align: center;
  color: var(--text-primary);
  font-weight: 600;
}

/* Cards */
.card, .calc-container, .warning-card, .video-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Card de indicador com espaçamento extra na parte inferior */
.indicator-card {
  margin-bottom: 60px !important;
}

.calc-container {
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.warning-card, .video-card {
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.warning-text {
  background: #fff3cd;
  color: #856404;
  padding: 15px 20px;
  border-radius: 10px;
  border: 1px solid #ffeaa7;
  font-size: 1rem;
  text-align: center;
  font-weight: 500;
  margin: 0;
}

[data-theme="dark"] .warning-text {
  background: #2d2a1f;
  color: #ffd43b;
  border-color: #4a4017;
}

/* Video container */
.video-container {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  background: #000; /* Fallback background */
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  border: none;
}

/* Video fallback styles */
.video-fallback {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.video-fallback:hover {
  transform: scale(1.02);
}

.video-fallback-content {
  text-align: center;
  color: white;
}

.video-thumbnail {
  position: relative;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.video-thumbnail img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  opacity: 0.8;
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
  transition: transform 0.2s ease;
}

.play-button:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

.video-fallback-text {
  margin-top: 15px;
  font-size: 14px;
  opacity: 0.9;
  font-weight: 500;
}

/* Mobile optimizations for video */
@media (max-width: 768px) {
  .video-container {
    margin: 10px 0;
    border-radius: 8px;
  }
  
  .video-container iframe {
    border-radius: 8px;
  }
  
  .video-fallback {
    border-radius: 8px;
  }
  
  .video-thumbnail {
    max-width: 250px;
  }
  
  .video-fallback-text {
    font-size: 12px;
  }
}

/* Formulários */
.input-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
  width: 100%;
}

@media (min-width: 768px) {
  .input-group {
    flex-direction: row;
    align-items: center;
    gap: 15px;
  }
  
  .input-group label {
    min-width: 200px;
    margin-bottom: 0;
  }
  
  .input-group input {
    flex: 1;
    margin-bottom: 0;
  }
  
  .input-group button {
    min-width: 100px;
  }
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

label a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

label a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

input[type="text"], 
input[type="number"] {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  font-size: 16px;
  margin-bottom: 10px;
  transition: all 0.3s ease;
  background: var(--input-bg);
  color: var(--text-primary);
}

input[type="text"]:focus, 
input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
  transform: translateY(-1px);
}

[data-theme="dark"] input[type="text"]:focus,
[data-theme="dark"] input[type="number"]:focus {
  box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.1);
}

/* Botões */
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
  justify-content: center;
}

button, .btn {
  padding: 12px 24px;
  color: var(--btn-text);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  min-width: 120px;
  touch-action: manipulation;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--primary-gradient);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--btn-shadow);
}

button:hover, .btn:hover {
  background: var(--primary-gradient-hover);
  transform: translateY(-2px);
  box-shadow: var(--btn-shadow-hover);
}

button:active, .btn:active {
  transform: translateY(0);
}

.clear-button {
  background: var(--danger-gradient);
  color: var(--btn-text);
}

.clear-button:hover {
  background: var(--danger-gradient-hover);
}

.Open-link {
  background: var(--success-gradient);
  color: var(--btn-text);
}

.Open-link:hover {
  background: var(--success-gradient-hover);
}

.calculate-button {
  background: var(--primary-gradient);
  color: var(--btn-text);
  font-size: 1.1rem;
  padding: 15px 30px;
}

.calculate-button:hover {
  background: var(--primary-gradient-hover);
}

.calculate-ptax-button {
  background: var(--success-gradient);
  color: var(--btn-text);
  font-size: 1rem;
  padding: 12px 24px;
}

.calculate-ptax-button:hover {
  background: var(--success-gradient-hover);
}

/* Botão de alternância de tema */
.theme-toggle {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  color: var(--text-primary);
  font-size: 16px;
  min-width: 40px;
  height: 40px;
  text-transform: none;
  letter-spacing: normal;
  box-shadow: var(--card-shadow);
}

.theme-toggle:hover {
  background: var(--table-hover);
  border-color: var(--primary);
  transform: scale(1.05);
  box-shadow: var(--btn-shadow);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-icon {
  transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(20deg);
}

/* Responsividade */
@media (max-width: 768px) {
  .logo {
    max-width: 300px;
  }
  
  .warning-card,
  .video-card {
    margin: 0 10px 20px;
    padding: 20px;
  }
  
  .warning-text {
    font-size: 0.9rem;
    padding: 12px 15px;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .calc-container {
    padding: 20px;
    margin: 0 10px 20px;
  }
  
  h1 {
    font-size: 1.6rem;
  }
  
  input[type="text"],
  input[type="number"],
  button {
    height: 48px;
  }
  
  button {
    width: 100%;
    margin: 5px 0;
  }
  
  .input-group button {
    margin-top: 8px;
  }
}

@media (max-width: 480px) {
  .logo {
    max-width: 250px;
  }
}

/* Animações */
.calc-container {
  animation: slideUp 0.6s ease-out;
}

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

.logo-header {
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Acessibilidade */
input:focus,
button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Modo escuro - ajustes específicos */
[data-theme="dark"] {
  color-scheme: dark;
}

[data-theme="dark"] .warning-card,
[data-theme="dark"] .video-card,
[data-theme="dark"] .calc-container {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .video-container {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}