/* CSS per il Calcolatore Tempo di Ricarica Batteria */
.battery-calculator-container * {
    box-sizing: border-box;
}

.battery-calculator-container {
    max-width: 1400px;
    margin: 40px auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 0px;
}

/* HEADER */
.battery-calculator-container .calculator-header {
    background: linear-gradient(135deg, #2980b9, #1a5f8a);
    color: white;
    padding: 30px;
    text-align: center;
}

.battery-calculator-container .calculator-header h1 {
    font-size: 2.2em;
    margin: 0 0 10px 0;
    font-weight: 300;
    color: #fafafa;
}

.battery-calculator-container .calculator-header p {
    opacity: 0.9;
    font-size: 1.1em;
    margin: 0;
}

/* SEZIONE CONTROLLI */
.battery-calculator-container .calculator-section {
    padding: 30px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.battery-calculator-container .controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.battery-calculator-container .control-group {
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 120px;
}

.battery-calculator-container .control-group:hover {
    transform: translateY(-2px);
}

.battery-calculator-container .control-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95em;
}

.battery-calculator-container .control-group .hint {
    display: block;
    margin-top: 6px;
    font-size: 0.78em;
    color: #888;
}

.battery-calculator-container select,
.battery-calculator-container input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    background-color: #fff;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    height: auto;
}

.battery-calculator-container select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-size: 16px 12px;
}

.battery-calculator-container select:focus,
.battery-calculator-container input[type="number"]:focus {
    outline: none;
    border-color: #2980b9;
}

/* SLIDER */
.battery-calculator-container .slider-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
}

.battery-calculator-container input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    outline: none;
    padding: 0;
    border: none;
}

.battery-calculator-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2980b9;
    cursor: pointer;
    transition: background 0.2s;
}

.battery-calculator-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2980b9;
    cursor: pointer;
    border: none;
}

.battery-calculator-container .slider-value {
    font-weight: 700;
    color: #2980b9;
    min-width: 40px;
    text-align: right;
    font-size: 1.05em;
}

/* RESULT CARDS */
.battery-calculator-container .result-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.battery-calculator-container .result-card {
    background: linear-gradient(135deg, #2980b9, #1a5f8a);
    color: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(41, 128, 185, 0.3);
}

.battery-calculator-container .result-card.accent {
    background: linear-gradient(135deg, #e67e22, #ca6f1e);
    box-shadow: 0 10px 30px rgba(230, 126, 34, 0.3);
    grid-column: span 1;
}

.battery-calculator-container .result-card h3 {
    font-size: 1.0em;
    margin-bottom: 10px;
    color: white;
    font-weight: 600;
}

.battery-calculator-container .parameter-display {
    font-size: 2.2em;
    font-weight: bold;
    margin-bottom: 5px;
    line-height: 1.1;
}

.battery-calculator-container .parameter-unit {
    font-size: 0.9em;
    opacity: 0.8;
}

/* BARRA PROGRESSO CARICA */
.battery-calculator-container .charge-bar-section {
    background: white;
    border-radius: 15px;
    padding: 20px 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.battery-calculator-container .charge-bar-section h4 {
    font-size: 0.95em;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 14px;
}

.battery-calculator-container .charge-bar-track {
    width: 100%;
    height: 28px;
    background: #e9ecef;
    border-radius: 14px;
    overflow: hidden;
    position: relative;
}

.battery-calculator-container .charge-bar-fill {
    height: 100%;
    border-radius: 14px;
    background: linear-gradient(90deg, #2ecc71, #f1c40f, #e67e22, #e74c3c);
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
}

.battery-calculator-container .charge-bar-fill span {
    color: white;
    font-weight: 700;
    font-size: 0.85em;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.battery-calculator-container .charge-bar-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 0.78em;
    color: #888;
}

/* AVVISO */
.battery-calculator-container .warning-box {
    background: #fff8e1;
    border-left: 4px solid #f39c12;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 0.88em;
    color: #7d6608;
    margin-top: 10px;
    display: none;
}

.battery-calculator-container .warning-box.visible {
    display: block;
}

/* TABELLA RIFERIMENTO */
.battery-calculator-container .table-section {
    padding: 30px;
    background: #fff;
}

.battery-calculator-container .table-section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 1.3em;
}

.battery-calculator-container .table-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.battery-calculator-container .filter-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    background: #e9ecef;
    color: #495057;
    font-family: inherit;
}

.battery-calculator-container .filter-btn.active {
    background: linear-gradient(135deg, #2980b9, #1a5f8a);
    color: white;
    transform: scale(1.05);
}

.battery-calculator-container .table-wrapper {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.battery-calculator-container .data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    min-width: 600px;
}

.battery-calculator-container .data-table th {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9em;
}

.battery-calculator-container .data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #e9ecef;
    font-size: 0.92em;
}

.battery-calculator-container .data-table tr:hover {
    background: #f8f9fa;
}

.battery-calculator-container .data-table .highlight-row {
    background: #eaf4fb;
    font-weight: 600;
}

.battery-calculator-container .tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.78em;
    font-weight: 600;
}

.battery-calculator-container .tag-slow { background: #d5f5e3; color: #1e8449; }
.battery-calculator-container .tag-normal { background: #d6eaf8; color: #1a5276; }
.battery-calculator-container .tag-fast { background: #fdebd0; color: #935116; }

/* NOTE */
.battery-calculator-container .notes-section {
    background: #2c3e50;
    color: white;
    padding: 30px;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
}

.battery-calculator-container .notes-section h2 {
    margin-bottom: 30px;
    color: #fafafa;
    font-size: 1.3em;
}

.battery-calculator-container .notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.battery-calculator-container .note-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #2980b9;
}

.battery-calculator-container .note-card h4 {
    margin-bottom: 15px;
    color: #5dade2;
    font-size: 1em;
}

.battery-calculator-container .note-card ul {
    list-style: none;
    padding-left: 0;
}

.battery-calculator-container .note-card li {
    margin-bottom: 8px;
    padding-left: 15px;
    position: relative;
    font-size: 0.9em;
    line-height: 1.5;
}

.battery-calculator-container .note-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #2980b9;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .battery-calculator-container .controls {
        grid-template-columns: 1fr;
    }

    .battery-calculator-container .result-cards {
        grid-template-columns: 1fr 1fr;
    }

    .battery-calculator-container .result-card.accent {
        grid-column: span 2;
    }

    .battery-calculator-container .calculator-header h1 {
        font-size: 1.6em;
    }

    .battery-calculator-container .parameter-display {
        font-size: 1.8em;
    }
}

@media (max-width: 480px) {
    .battery-calculator-container .result-cards {
        grid-template-columns: 1fr;
    }

    .battery-calculator-container .result-card.accent {
        grid-column: span 1;
    }
}