/* ===== VARIÁVEIS E CONFIGURAÇÕES GERAIS ===== */
:root {
  /* Cores principais */
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-card: #1e293b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #10b981;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-border: #334155;
  
  /* Sombras */
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
  --shadow-button: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-input: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  
  /* Bordas */
  --radius-card: 16px;
  --radius-input: 10px;
  --radius-button: 10px;
  
  /* Transições */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ===== RESET E ESTILOS BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--color-bg-primary);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

/* Efeito de gradiente sutil no fundo */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
  z-index: -1;
}

/* ===== CONTAINER PRINCIPAL ===== */
.container {
  width: 100%;
  max-width: 440px;
  margin: 20px auto;
  padding: 40px 32px;
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal);
}

.container:hover {
  transform: translateY(-4px);
}

/* Elemento decorativo no topo do container */
.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
}

/* ===== TIPOGRAFIA ===== */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: 28px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, var(--color-text-primary), var(--color-text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
  font-weight: 400;
}

/* ===== FORMULÁRIOS E INPUTS ===== */
.form-group {
  margin-bottom: 24px;
  text-align: left;
}

label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

input, select {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(30, 41, 59, 0.7);
  color: var(--color-text-primary);
  font-size: 15px;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-input);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  background: rgba(30, 41, 59, 0.9);
}

input::placeholder {
  color: #64748b;
}

/* ===== BOTÕES ===== */
button {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-button);
  border: none;
  background: var(--color-primary);
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-button);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

button:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px -1px rgba(0, 0, 0, 0.25);
}

button:active {
  transform: translateY(0);
}

button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.4);
}

/* Ícone no botão (opcional) */
button::after {
  content: '→';
  font-size: 18px;
  opacity: 0.8;
  transition: transform var(--transition-fast);
}

button:hover::after {
  transform: translateX(4px);
}

/* ===== LINKS ===== */
a {
  display: inline-block;
  margin-top: 24px;
  color: var(--color-success);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

a:hover {
  color: #34d399;
}

a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-success);
  transition: width var(--transition-normal);
}

a:hover::after {
  width: 100%;
}

/* ===== MENSAGENS DE STATUS ===== */
.message {
  padding: 14px 16px;
  border-radius: var(--radius-input);
  margin-bottom: 24px;
  font-size: 14px;
  display: none;
}

.message.success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: block;
}

.message.error {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  display: block;
}

/* ===== RESPONSIVIDADE ===== */
@media (max-width: 480px) {
  .container {
    padding: 32px 24px;
    margin: 10px auto;
  }
  
  h1 {
    font-size: 24px;
  }
  
  input, select, button {
    padding: 14px;
  }
}

@media (max-width: 360px) {
  .container {
    padding: 24px 20px;
  }
  
  h1 {
    font-size: 22px;
  }
  
  .subtitle {
    font-size: 14px;
  }
}

/* ===== ANIMAÇÕES ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  animation: fadeIn 0.5s ease-out;
}

/* ===== ESTILOS ADICIONAIS PARA ELEMENTOS ESPECÍFICOS ===== */
.divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.divider span {
  padding: 0 16px;
}

.social-login {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.social-btn {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-weight: 500;
}

.social-btn:hover {
  background: rgba(30, 41, 59, 1);
}

/* ===== UTILITÁRIOS ===== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* Info de dimensão */
#originalSize {
  font-size: 14px;
}

/* Checkbox alinhado melhor */
input[type="checkbox"] {
  accent-color: var(--color-primary);
}