/* NASA Color Palette */
:root {
  --nasa-blue: #0b3d91;
  --nasa-red: #ce1126;
  --light-gray: #f4f6f8;
  --dark-gray: #2a2a2a;
  --white: #ffffff;
  --border-color: #e0e4e8;
  --success-green: #2e7d32;
  --error-red: #c62828;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--dark-gray);
  background-color: var(--light-gray);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
}

/* Header */
.header {
  background-color: var(--nasa-blue);
  color: var(--white);
  padding: 1rem 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.logo-area {
  display: flex;
  align-items: center;
}

.nasa-logo {
  height: 60px;
  width: auto;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 2rem 1.5rem;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.content-card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

/* Section Styling */
.input-section,
.results-section {
  padding: 2rem;
}

.input-section {
  border-bottom: 2px solid var(--light-gray);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--nasa-blue);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--nasa-red);
}

/* Sample Data Button */
.sample-data-btn {
  background: var(--light-gray);
  border: 2px dashed var(--border-color);
  color: var(--dark-gray);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.sample-data-btn:hover {
  background: var(--white);
  border-color: var(--nasa-blue);
  color: var(--nasa-blue);
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 1.1rem;
}

#exoplanetSection {
  animation: fadeIn 0.4s ease;
}

#exoplanetFrame {
  width: 100%;
  display: block;
}

/* Form Styling */
.observation-form {
  display: grid;
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-field label {
  font-weight: 600;
  color: var(--dark-gray);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tooltip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--border-color);
  color: var(--dark-gray);
  border-radius: 50%;
  font-size: 0.75rem;
  cursor: help;
  position: relative;
  font-weight: normal;
}

.tooltip:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--dark-gray);
  color: var(--white);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  white-space: normal;
  width: 250px;
  z-index: 1000;
  line-height: 1.4;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  font-weight: normal;
}

.tooltip:hover::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: calc(100% + 2px);
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--dark-gray);
  z-index: 1001;
}

.form-field input {
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: var(--white);
  font-family: inherit;
}

.form-field input:focus {
  outline: none;
  border-color: var(--nasa-blue);
  box-shadow: 0 0 0 3px rgba(11, 61, 145, 0.1);
}

.form-field input.error {
  border-color: var(--error-red);
}

.form-field input.valid {
  border-color: var(--success-green);
}

.error-message {
  color: var(--error-red);
  font-size: 0.85rem;
  min-height: 1.2rem;
  display: block;
}

/* Primary Button */
.primary-btn {
  background: var(--nasa-blue);
  color: var(--white);
  border: none;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-width: 180px;
}

.primary-btn:hover:not(:disabled) {
  background: #083371;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(11, 61, 145, 0.3);
}

.primary-btn:active:not(:disabled) {
  transform: translateY(0);
}

.primary-btn:disabled {
  background: var(--border-color);
  color: #999;
  cursor: not-allowed;
  transform: none;
}

.primary-btn.loading {
  background: var(--nasa-blue);
  opacity: 0.8;
  cursor: wait;
}

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-large {
  width: 48px;
  height: 48px;
  border: 4px solid var(--light-gray);
  border-top-color: var(--nasa-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

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

/* Results Section */
.results-section {
  background: var(--light-gray);
}

.waiting-state {
  text-align: center;
  padding: 3rem 1.5rem;
}

.waiting-text {
  margin-top: 1.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--dark-gray);
}

.waiting-timestamp {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #666;
}

/* Results Display */
.results-display {
  animation: fadeIn 0.4s ease;
}

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

.result-highlight {
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, var(--nasa-blue) 0%, #0d4db3 100%);
  border-radius: 12px;
  margin-bottom: 2rem;
  box-shadow: 0 4px 16px rgba(11, 61, 145, 0.2);
}

.result-percent-label {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.result-percent-value {
  color: var(--white);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
}

/* Results Table */
.results-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.results-table th,
.results-table td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.results-table th {
  font-weight: 600;
  color: var(--nasa-blue);
  background: var(--light-gray);
  width: 40%;
}

.results-table td {
  color: var(--dark-gray);
  font-weight: 500;
}

.results-table tr:last-child th,
.results-table tr:last-child td {
  border-bottom: none;
}

.results-table tr:hover {
  background: rgba(11, 61, 145, 0.02);
}

/* Timeout State */
.timeout-state {
  text-align: center;
  padding: 3rem 1.5rem;
}

.timeout-text {
  font-size: 1.05rem;
  color: var(--dark-gray);
  line-height: 1.6;
}

/* Footer */
.footer {
  background: var(--white);
  padding: 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer p {
  color: #666;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (min-width: 768px) {
  .observation-form {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-field:last-of-type {
    grid-column: 1 / -1;
  }

  .primary-btn {
    grid-column: 1 / -1;
    width: fit-content;
    justify-self: center;
  }
}

@media (min-width: 1024px) {
  .content-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .input-section {
    border-bottom: none;
    border-right: 2px solid var(--light-gray);
  }

  .results-section {
    background: var(--white);
  }

  .page-title {
    font-size: 2rem;
  }
}

@media (max-width: 767px) {
  .header-content {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .nasa-logo {
    height: 50px;
  }

  .main-content {
    padding: 1rem;
  }

  .input-section,
  .results-section {
    padding: 1.5rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .result-percent-value {
    font-size: 2.5rem;
  }

  .results-table th,
  .results-table td {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

input:focus-visible,
button:focus-visible {
  outline: 3px solid var(--nasa-blue);
  outline-offset: 2px;
}