:root {
  --background-color: #f4f7f9;
  --card-background: #ffffff;
  --primary-text-color: #212529;
  --secondary-text-color: #6c757d;
  --primary-accent-color: #0d6efd;
  --primary-accent-hover: #0b5ed7;
  --secondary-accent-color: #6c757d;
  --secondary-accent-hover: #5c636a;
  --danger-color: #dc3545;
  --danger-hover: #bb2d3b;
  --warning-bg-color: #fff3cd;
  --warning-border-color: #ffe69c;
  --warning-text-color: #664d03;
  --border-color: #dee2e6;
  --input-background: #ffffff;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--primary-text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1rem;
}

#root {
  width: 100%;
  max-width: 500px;
}

.app-container {
  background-color: var(--card-background);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

h3 {
  color: var(--primary-text-color);
  font-weight: 700;
  margin: 0;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

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

label {
  font-weight: 500;
  color: var(--secondary-text-color);
}

.input-field, select.input-field {
  background-color: var(--input-background);
  border: 1px solid var(--border-color);
  color: var(--primary-text-color);
  padding: 0.75rem;
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

select.input-field {
    background-image: url('data:image/svg+xml;utf8,<svg fill="black" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.input-field:focus {
  outline: none;
  border-color: var(--primary-accent-color);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

.sound-select-group {
    display: flex;
    gap: 0.5rem;
}
.sound-select-group select {
    flex-grow: 1;
}
.sound-select-group button {
    flex-shrink: 0;
    padding: 0.75rem;
}

.slider-field {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 5px;
    outline: none;
    opacity: 0.9;
    transition: opacity .2s;
    border: 1px solid var(--border-color);
}

.slider-field:hover { opacity: 1; }
.slider-field::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-accent-color);
    cursor: pointer;
    border-radius: 50%;
}
.slider-field::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-accent-color);
    cursor: pointer;
    border-radius: 50%;
}

.btn {
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out, transform 0.1s ease-in-out;
  text-align: center;
}

.btn.btn-large {
    padding: 0.85rem 1.5rem;
    font-size: 1.1rem;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primary { background-color: var(--primary-accent-color); color: white; }
.btn-primary:not(:disabled):hover { background-color: var(--primary-accent-hover); }

.btn-secondary { background-color: transparent; color: var(--secondary-accent-color); border: 1px solid var(--border-color); }
.btn-secondary:not(:disabled):hover { background-color: #f8f9fa; }

.btn-danger { background-color: var(--danger-color); color: white; }
.btn-danger:not(:disabled):hover { background-color: var(--danger-hover); }

.status-container {
    text-align: center;
    padding: 1rem;
    border-radius: 4px;
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
}

#status-message {
    font-size: 1.1rem;
    font-weight: 500;
    transition: color 0.3s ease-in-out;
}

#status-message.idle { color: var(--secondary-text-color); }
#status-message.monitoring { color: var(--primary-accent-color); }
#status-message.alarm {
    color: var(--danger-color);
    font-weight: 700;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); } 50% { transform: scale(1.03); } 100% { transform: scale(1); }
}

.weekday-selector {
    display: flex;
    justify-content: space-around;
    align-items: center;
    background-color: #f8f9fa;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.weekday-selector label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.weekday-selector input[type="checkbox"] {
    accent-color: var(--primary-accent-color);
}

.time-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.time-selector select { flex: 1; }
.time-selector span { color: var(--secondary-text-color); }

.inbox-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.inbox-container h2 {
    font-size: 1.2rem;
    color: var(--secondary-text-color);
    text-align: center;
    font-weight: 500;
}

#activity-list {
    list-style: none;
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.75rem;
    height: 150px;
    overflow-y: auto;
    display: flex;
    flex-direction: column-reverse; /* Show newest first */
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    color: var(--secondary-text-color);
}

#activity-list li {
    padding: 0.1rem 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.disclaimer {
    font-size: 0.8rem;
    text-align: center;
    color: var(--secondary-text-color);
}

.auth-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f8f9fa;
    padding: 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
.auth-info span {
    font-weight: 500;
}

.auth-error-message {
    background-color: var(--warning-bg-color);
    border: 1px solid var(--warning-border-color);
    color: var(--warning-text-color);
    padding: 1rem;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.auth-error-message h4 {
    color: var(--warning-text-color);
    font-size: 1.1rem;
    margin: 0;
}
.auth-error-message p {
    font-size: 0.9rem;
    margin: 0;
}

.setup-description {
    font-size: 0.9rem;
    color: var(--secondary-text-color);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}
.setup-description a {
    color: var(--primary-accent-color);
    text-decoration: none;
    font-weight: 500;
}
.setup-description a:hover {
    text-decoration: underline;
}