/* ============================================
   ULTREMARE — SISTEMA DE AUTENTICAÇÃO
   Universal, moderno, responsivo
============================================ */

:root {
  /* Cores */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  
  /* Neutros */
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  
  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
  
  /* Tipografia */
  --font-sans: 'Inter', -apple-system, system-ui, sans-serif;
  
  /* Outros */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0a0a0f;
  --bg-alt: #131318;
  --surface: #1a1a24;
  --border: #2d2d3a;
  --text: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.5);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.6);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: var(--transition);
}

/* ========== BACKGROUND ========== */
.auth-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.grid-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  animation: float 20s infinite ease-in-out;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -200px;
  left: -200px;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: var(--primary-light);
  bottom: -150px;
  right: -150px;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(60px, 60px); }
}

/* ========== CONTAINER ========== */
.auth-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

/* ========== BRAND ========== */
.auth-brand {
  position: absolute;
  top: 2rem;
  left: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
  color: var(--text);
  transition: var(--transition);
  text-transform: lowercase;
}

.auth-brand:hover {
  opacity: 0.7;
}

.brand-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

/* ========== AUTH CARD ========== */
.auth-card {
  width: 100%;
  max-width: 450px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: slideUp 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== TABS ========== */
.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  text-transform: lowercase;
}

.tab-btn svg {
  width: 18px;
  height: 18px;
}

.tab-btn:hover {
  color: var(--text);
  background: rgba(37, 99, 235, 0.05);
}

.tab-btn.active {
  color: var(--primary);
  background: var(--surface);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

/* ========== FORM ========== */
.auth-form {
  padding: 2rem;
  display: none;
  animation: fadeIn 0.4s ease;
}

.auth-form.active {
  display: block;
}

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

.form-header {
  margin-bottom: 2rem;
  text-align: center;
}

.form-header h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
  text-transform: lowercase;
}

.form-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-transform: lowercase;
}

/* ========== FORM GROUP ========== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  text-transform: lowercase;
}

.form-group label svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text);
  transition: var(--transition);
  font-family: var(--font-sans);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

/* ========== PASSWORD INPUT ========== */
.password-input {
  position: relative;
}

.password-input input {
  padding-right: 3rem;
}

.toggle-password {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.toggle-password:hover {
  background: var(--bg-alt);
  color: var(--text);
}

.toggle-password svg {
  width: 18px;
  height: 18px;
}

/* ========== PASSWORD STRENGTH ========== */
.password-strength {
  margin-top: 0.75rem;
}

.strength-bar {
  height: 4px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.strength-fill {
  height: 100%;
  width: 0%;
  background: var(--error);
  border-radius: 999px;
  transition: all 0.3s ease;
}

.strength-fill.weak {
  width: 33%;
  background: var(--error);
}

.strength-fill.medium {
  width: 66%;
  background: var(--warning);
}

.strength-fill.strong {
  width: 100%;
  background: var(--success);
}

.strength-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: lowercase;
}

/* ========== FORM OPTIONS ========== */
.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  text-transform: lowercase;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  position: relative;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--primary);
  border-color: var(--primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '✓';
  color: white;
  font-size: 12px;
  font-weight: 700;
}

.link {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
  text-transform: lowercase;
}

.link:hover {
  text-decoration: underline;
}

/* ========== BUTTONS ========== */
.btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  text-transform: lowercase;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ========== DIVIDER ========== */
.form-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: lowercase;
}

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

/* ========== SOCIAL BUTTONS ========== */
.social-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  text-transform: lowercase;
}

.btn-social:hover {
  background: var(--surface);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

/* ========== FOOTER ========== */
.auth-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: lowercase;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

/* ========== THEME TOGGLE ========== */
.theme-toggle-fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: var(--transition);
  z-index: 100;
}

.theme-toggle-fab:hover {
  transform: scale(1.1) rotate(15deg);
  box-shadow: var(--shadow-xl);
}

.theme-icon {
  width: 20px;
  height: 20px;
  color: var(--text);
}

/* ========== LOADING OVERLAY ========== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  text-transform: lowercase;
}

.loading-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay p {
  color: white;
  font-size: 0.95rem;
  font-weight: 500;
}

/* ========== TOAST ========== */
.toast {
  position: fixed;
  top: 2rem;
  right: 2rem;
  min-width: 320px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  z-index: 10000;
  transform: translateX(400px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast-icon svg {
  width: 24px;
  height: 24px;
  color: var(--success);
}

.toast.error .toast-icon svg {
  color: var(--error);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.25rem;
  text-transform: lowercase;
}

.toast-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: lowercase;
}

.toast-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 4px;
  transition: var(--transition);
}

.toast-close:hover {
  background: var(--bg-alt);
  color: var(--text);
}

.toast-close svg {
  width: 16px;
  height: 16px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 640px) {
  .auth-brand {
    position: static;
    margin-bottom: 2rem;
  }

  .auth-container {
    padding: 1.5rem;
  }

  .auth-card {
    max-width: 100%;
  }

  .auth-form {
    padding: 1.5rem;
  }

  .social-buttons {
    grid-template-columns: 1fr;
  }

  .theme-toggle-fab {
    bottom: 1.5rem;
    right: 1.5rem;
  }

  .toast {
    left: 1rem;
    right: 1rem;
    min-width: auto;
    top: auto;
    bottom: 2rem;
  }

  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .auth-tabs {
    font-size: 0.875rem;
  }

  .tab-btn span {
    display: none;
  }

  .form-header h2 {
    font-size: 1.5rem;
  }
}