:root {
    --primary-color: #007bff;
    --secondary-color: #303030;
    --dark-color: #c5c5c5;
    --light-color: #181818;
    --border-radius: 8px;
    --box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--secondary-color);
    color: var(--dark-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: auto;
    background: var(--light-color);
    padding: 15px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid #eee;
    padding-bottom: .50rem;
}

h1 {
    color: var(--primary-color);
    margin: .8rem;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 1.5rem;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    padding: 20px 0 30px 20px;
}

.control-group {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    padding-right: 20px;
}

label {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

select, input[type="number"], textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    background-color: #242424;
    color: var(--dark-color);
}

textarea {
    resize: vertical;
}

.card {
    background: #242424;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border: 1px solid #e9e9e9;
}

.series-inputs {
    display: grid;
    gap: 15px;
    margin-top: 1rem;
}

button {
    display: block;
    width: 100%;
    padding: 12px;
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--light-color);
    background-color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 1rem;
}

button:hover {
    background-color: #0056b3;
}

#toggle-history-btn {
    background-color: #6c757d;
}
#toggle-history-btn:hover {
    background-color: #5a6268;
}

#finish-workout-btn {
    background-color: #28a745;
}
#finish-workout-btn:hover {
    background-color: #218838;
}

#clear-history-btn {
    background-color: #dc3545;
}
#clear-history-btn:hover {
    background-color: #a71d2a;
}

.hidden {
    display: none;
}

.card-suggestion {
    background-color: #242424;
    color: #c5c5c5;
    border-left: 5px solid var(--primary-color);
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border: 1px solid #e9e9e9;
}

#history-log {
    margin-top: 1.5rem;
}

.series-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
}

.series-control button {
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    padding: 0;
    margin: 0;
    line-height: 1;
}

#series-count {
    width: 35px;
    text-align: center;
}

.history-block {
    border: 2px solid var(--primary-color);
    padding: 5px 10px 5px 10px;
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    background: #181818;
    color: var(--dark-color);
}

.history-block h2 {
    margin-top: 0;
    margin-bottom: 6px;
    color: var(--primary-color);
}

.history-block .history-item {
    background: #242424;
    padding: 8px;
    margin-bottom: 6px;
    border-radius: var(--border-radius);
}

.history-item h4 {
    margin-top: 0;
    margin-bottom: 4px;
    color: var(--primary-color);
}
.history-item  p{
    margin: -4px 0;
    font-size: 14px;
}