/* Reset e Variáveis */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --secondary: #3b82f6;
  --secondary-dark: #1e40af;
  --accent: #fbbf24;
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --text-light: #f1f5f9;
  --text-muted: #cbd5e1;
  --border: #334155;
  --success: #10b981;
  --error: #ef4444;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  color: var(--text-light);
  line-height: 1.6;
  min-height: 100vh;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
header {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.logout-btn {
  padding: 0.5rem 1rem;
  background: var(--error);
  color: white;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
  transition: background 0.3s;
  display: none;
}

.logout-btn:hover {
  background: #dc2626;
}

.logout-btn.show {
  display: block;
}

/* Main Content */
main {
  padding: 2rem 0;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(59, 130, 246, 0.1));
  border-radius: 1rem;
  border: 1px solid var(--border);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Card */
.card {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.5), rgba(15, 23, 42, 0.5));
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(59, 130, 246, 0.1));
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(124, 58, 237, 0.2);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.card-description {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* Button */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 25px rgba(124, 58, 237, 0.3);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), #0ea5e9);
  color: white;
}

.btn-secondary:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--primary);
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-light);
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  background: rgba(51, 65, 85, 0.5);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-light);
  font-family: inherit;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(51, 65, 85, 0.8);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* Audio Player */
.audio-player {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(59, 130, 246, 0.1));
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.player-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.player-btn {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-btn:hover {
  transform: scale(1.1);
}

.player-btn.play-btn {
  width: 4rem;
  height: 4rem;
  font-size: 1.5rem;
}

.progress-bar {
  width: 100%;
  height: 0.5rem;
  background: rgba(51, 65, 85, 0.5);
  border-radius: 0.25rem;
  overflow: hidden;
  margin: 1rem 0;
  cursor: pointer;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  width: 0%;
  transition: width 0.1s;
}

.time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Playlist */
.playlist {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.5), rgba(15, 23, 42, 0.5));
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.playlist h3 {
  margin-bottom: 1rem;
  color: var(--text-light);
}

.playlist-item {
  padding: 1rem;
  background: rgba(51, 65, 85, 0.3);
  border-radius: 0.5rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
}

.playlist-item:hover {
  background: rgba(124, 58, 237, 0.2);
  border-color: var(--primary);
}

.playlist-item.active {
  background: rgba(124, 58, 237, 0.3);
  border-color: var(--primary);
}

.playlist-item-title {
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

.playlist-item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  padding: 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-light);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Login Page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.login-box {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.8), rgba(15, 23, 42, 0.8));
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.login-box h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-box p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  display: none;
}

.alert.show {
  display: block;
}

.alert-success {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--success);
  color: var(--success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid var(--error);
  color: var(--error);
}

.alert-info {
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid var(--secondary);
  color: var(--secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.875rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .player-btn {
    width: 2.5rem;
    height: 2.5rem;
  }

  .player-btn.play-btn {
    width: 3.5rem;
    height: 3.5rem;
  }

  .tabs {
    flex-wrap: wrap;
  }

  .tab-btn {
    padding: 0.75rem;
    font-size: 0.875rem;
  }
}

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

.fade-in {
  animation: fadeIn 0.3s ease;
}

/* Footer */
footer {
  background: rgba(15, 23, 42, 0.8);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  margin-top: 3rem;
}

footer p {
  margin: 0;
}