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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: #0a0e27;
  color: #e2e8f0;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ==================== BACKGROUND ==================== */
.app-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at top left, rgba(30, 58, 138, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    linear-gradient(180deg, #0a0e27 0%, #0f172a 100%);
  z-index: -1;
}

/* ==================== AUTH PAGES ==================== */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.auth-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.5) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(71, 85, 105, 0.3);
  border-radius: 24px;
  padding: 48px 40px;
  max-width: 450px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-header {
  text-align: center;
  margin-bottom: 40px;
}

.auth-icon {
  font-size: 64px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.6));
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.auth-title {
  font-size: 28px;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 14px;
  color: #94a3b8;
}

.auth-form {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(71, 85, 105, 0.3);
  border-radius: 12px;
  font-size: 15px;
  color: #f1f5f9;
  transition: all 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: rgba(59, 130, 246, 0.5);
  background: rgba(15, 23, 42, 0.8);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
  color: #64748b;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  font-size: 13px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #94a3b8;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.link-text {
  color: #60a5fa;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.link-text:hover {
  color: #93c5fd;
  text-decoration: underline;
}

.auth-btn {
  width: 100%;
  padding: 14px;
  background: #3b82f6;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 8px;
}

.auth-btn:hover {
  background: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

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

.auth-btn:disabled {
  background: #475569;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  display: none;
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  color: #f87171;
  font-size: 13px;
  margin-top: 16px;
  text-align: center;
}

.error-message.show {
  display: block;
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

.success-message {
  display: none;
  padding: 12px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 8px;
  color: #6ee7b7;
  font-size: 13px;
  margin-top: 16px;
  text-align: center;
}

.success-message.show {
  display: block;
}

.auth-footer {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(71, 85, 105, 0.2);
  font-size: 14px;
  color: #64748b;
}

/* ==================== DASHBOARD ==================== */
.dashboard-container {
  display: none;
  max-width: 1600px;
  margin: 0 auto;
  padding: 32px 24px;
}

.dashboard-container.active {
  display: block;
}

/* ==================== HEADER ==================== */
.dashboard-header {
  margin-bottom: 40px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.header-right {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.app-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 12px;
}

.title-icon {
  font-size: 32px;
  filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.6));
}

.location-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #60a5fa;
}

.location-icon {
  font-size: 14px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #10b981;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-name {
  padding: 8px 16px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #a78bfa;
}

.logout-btn {
  padding: 8px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #ef4444;
  cursor: pointer;
  transition: all 0.2s ease;
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.3);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.header-subtitle {
  font-size: 15px;
  color: #94a3b8;
  font-weight: 400;
}

/* ==================== METRICS GRID ==================== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.metric-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.4) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(71, 85, 105, 0.3);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

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

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.metric-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #94a3b8;
}

.metric-icon {
  font-size: 28px;
  opacity: 0.9;
  filter: drop-shadow(0 0 6px rgba(59, 130, 246, 0.4));
}

.metric-value {
  font-size: 32px;
  font-weight: 700;
  color: #f1f5f9;
  letter-spacing: -1px;
  margin-bottom: 4px;
}

.metric-unit {
  font-size: 18px;
  font-weight: 500;
  color: #64748b;
  margin-left: 4px;
}

.metric-subtext {
  font-size: 12px;
  color: #64748b;
  margin-top: 4px;
  font-weight: 500;
}

/* ==================== CHART SECTION ==================== */
.chart-section {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.4) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(71, 85, 105, 0.3);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 32px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 10px;
}

.chart-wrapper {
  height: 360px;
  position: relative;
}

/* ==================== PREDICTIONS GRID ==================== */
.predictions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.prediction-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.4) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(71, 85, 105, 0.3);
  border-radius: 16px;
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.prediction-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(40%, -40%);
}

.prediction-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.prediction-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.prediction-icon-wrapper {
  width: 48px;
  height: 48px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.prediction-info h3 {
  font-size: 15px;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 4px;
}

.prediction-time {
  font-size: 12px;
  color: #64748b;
  font-weight: 500;
}

.prediction-value-display {
  font-size: 40px;
  font-weight: 800;
  color: #f1f5f9;
  letter-spacing: -1.5px;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.prediction-confidence {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: #10b981;
}

/* ==================== FOOTER ==================== */
.dashboard-footer {
  text-align: center;
  padding: 28px 24px;
  border-top: 1px solid rgba(71, 85, 105, 0.3);
  margin-top: 20px;
}

.footer-line {
  margin: 8px 0;
  font-size: 13px;
  color: #64748b;
  line-height: 1.8;
}

.footer-line strong {
  color: #f1f5f9;
  font-weight: 700;
  font-size: 14px;
}

.footer-link {
  color: #60a5fa;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-link:hover {
  color: #93c5fd;
  transform: translateY(-1px);
}

.github-icon {
  font-size: 14px;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .auth-card {
    padding: 36px 28px;
  }

  .header-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .header-right {
    width: 100%;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .chart-wrapper {
    height: 280px;
  }

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

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.5);
}

::-webkit-scrollbar-thumb {
  background: rgba(71, 85, 105, 0.6);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(71, 85, 105, 0.8);
}