/* style.css - Configurações de Base e Gerenciamento de Temas */
:root {
  --bg-main: #070B14;
  --bg-card: rgba(255, 255, 255, 0.03);
  --border-color: rgba(255, 255, 255, 0.06);
  --text-primary: #FFFFFF;
  --text-secondary: #B8B8B8;
  
  --accent-purple: #7B61FF;
  --accent-cyan: #00D1FF;
  --accent-green: #00E676;
  --accent-red: #FF1744;
  
  --gradient-primary: linear-gradient(90deg, #7B61FF, #00D1FF);
  --font-stack: 'Inter', sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-theme {
  --bg-main: #F4F7F9;
  --bg-card: #FFFFFF;
  --border-color: #E2E8F0;
  --text-primary: #0F172A;
  --text-secondary: #475569;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-stack);
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: var(--transition-smooth);
  line-height: 1.6;
}

/* Header */
.header {
  width: 100%;
  padding: 20px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  background-color: rgba(7, 11, 20, 0.5);
  transition: var(--transition-smooth);
}
body.light-theme .header {
  background-color: rgba(244, 247, 249, 0.5);
}

.logo {
  font-size: 26px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  cursor: pointer;
  text-decoration: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

/* Botões Globais */
.btn {
  padding: 12px 24px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(123, 97, 255, 0.3);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
}
body.light-theme .btn-secondary:hover {
  background: rgba(0, 0, 0, 0.03);
}

/* Global Progress Wrapper */
.global-progress-wrapper {
  width: 100%;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 8%;
  position: fixed;
  top: 77px;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.progress-info-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
  white-space: nowrap;
}

.progress-track {
  flex-grow: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}
body.light-theme .progress-track {
  background: rgba(0, 0, 0, 0.08);
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-academic {
  padding: 40px 8%;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 60px;
}

/* Modal de Login */
.login-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(8px);
  z-index: 3000;
  display: none;
  align-items: center;
  justify-content: center;
}

.login-card-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: 24px;
  width: 100%;
  max-width: 420px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.close-modal-x {
  position: absolute;
  top: 20px;
  right: 20px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 20px;
}

.login-card-box h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.login-card-box p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 25px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 20px;
}

.form-group input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 14px;
}

.oauth-divider {
  text-align: center;
  margin: 20px 0;
  font-size: 12px;
  color: var(--text-secondary);
  position: relative;
}

.oauth-divider::before, .oauth-divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 35%;
  height: 1px;
  background: var(--border-color);
}
.oauth-divider::before { left: 0; }
.oauth-divider::after { right: 0; }

.btn-oauth-google {
  width: 100%;
  background: #FFFFFF;
  color: #1A1A1A;
  border: 1px solid #E2E8F0;
}
.btn-oauth-google:hover { background: #F8FAFC; }