:root {
    --bg-color: #1a1a1a;
    --card-color: #2a2a2a;
    --text-color: #e0e0e0;
    --primary-color: #00aaff;
    --secondary-color: #888;
    --danger-color: #e74c3c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--card-color);
    padding-bottom: 20px;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

header p {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

@media (min-width: 768px) {
    main {
        grid-template-columns: 300px 1fr;
    }
}

.entry-form, .entries-list {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #333;
}

h2 {
    margin-top: 0;
    color: var(--primary-color);
    border-bottom: 1px solid #444;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

input[type="datetime-local"],
input[type="text"],
select,
textarea {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    background-color: #333;
    border: 1px solid #444;
    border-radius: 4px;
    color: var(--text-color);
    font-family: inherit;
}

input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

.intensity-slider {
    display: flex;
    align-items: center;
    gap: 10px;
}

input[type="range"] {
    flex-grow: 1;
    cursor: pointer;
}

output {
    font-weight: bold;
    color: var(--primary-color);
}

button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0088cc;
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.controls button {
    width: auto;
    flex-grow: 1;
    padding: 8px 12px;
    font-size: 0.9rem;
}

button.danger {
    background-color: var(--danger-color);
}
button.danger:hover {
    background-color: #c0392b;
}

.suggestions-container {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 8px;
}

.suggestion-tag {
    background-color: #444;
    color: #ccc;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.2s;
    border: 1px solid #555;
}

.suggestion-tag:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}


.entries-container-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.day-summary-card {
    background-color: #333;
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid var(--primary-color);
    flex-basis: calc(50% - 10px);
    box-sizing: border-box;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.day-summary-card:hover {
    background-color: #444;
    transform: translateY(-2px);
}

.day-summary-card h3 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.day-summary-card p {
    margin: 4px 0;
    font-size: 0.9rem;
    color: #ccc;
}

.hidden {
    display: none;
}

#details-container {
    margin-top: 20px;
    padding: 20px;
    background-color: #333;
    border-radius: 8px;
}

.details-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.details-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.details-header .close-btn {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0 10px;
}

.chart-container {
    margin-bottom: 20px;
}

.day-entries {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.entry-card {
    background-color: #333;
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid var(--primary-color);
    border: 1px solid #444;
}

.entry-card h3 {
    margin: 0 0 10px 0;
    font-size: 1.1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.entry-card h3 .intensity {
    font-size: 1rem;
    font-weight: bold;
    margin-left: auto;
}

.entry-card p {
    margin: 5px 0;
    font-size: 0.9rem;
    color: #ccc;
    word-break: break-word;
}

.entry-card p strong {
    color: #a0a0a0;
}

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

.entry-card .delete-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0;
    font-size: 1.2rem;
    opacity: 0.7;
}

.entry-card .delete-btn:hover {
    opacity: 1;
}