* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background: #020617;
  color: #e5e7eb;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  padding: 1rem 1.25rem;
  text-align: center;
  background: #0f172a;
  border-bottom: 1px solid #1f2937;
}

.app-header h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.app-header p {
  font-size: 0.9rem;
  color: #9ca3af;
}

.app-main {
  flex: 1;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: #020617;
  border-radius: 1rem;
  border: 1px solid #1f2937;
  padding: 1rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.35);
}

.card h2 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

input[type="number"],
select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border-radius: 0.75rem;
  border: 1px solid #4b5563;
  background: #020617;
  color: #e5e7eb;
}

input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: #60a5fa;
}

button {
  margin-top: 0.5rem;
  width: 100%;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: #2563eb;
  color: #e5e7eb;
}

button:active {
  transform: translateY(1px);
}

.details {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-top: 0.5rem;
}

.app-footer {
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: #6b7280;
  border-top: 1px solid #1f2937;
}

/* ISO / Blenden Farben */
option.aperture-full,
option.iso-full {
  color: #22c55e; /* Grün für volle Stops */
}

option.aperture-third,
option.iso-third {
  color: #f97316; /* Orange für 1/3 Stops */
}

/* Mode-Toggle */
.mode-toggle {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.mode-option {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  border: 1px solid #4b5563;
  font-size: 0.85rem;
  cursor: pointer;
}

.mode-option input[type="radio"] {
  accent-color: #2563eb;
}