/* --- Stili Base e Variabili (DAL Q-SYSTEM) --- */
:root {
    --primary-color: #0056b3; /* Blu scuro */
    --secondary-color: #2a9d8f; /* Verde acqua per Q */
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-bg: #f8f9fa;
    --medium-bg: #e9ecef;
    --white-bg: #fff;
    --dark-text: #212529;
    --medium-text: #495057;
    --light-text: #6c757d;
    --border-color: #dee2e6;
    --border-radius: 6px;
    --box-shadow: 0 3px 10px rgba(0, 0, 0, 0.07);
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.4;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--dark-text);
}

/* --- Struttura Principale (DAL Q-SYSTEM) --- */
.tab-container {
    max-width: 900px; /* Larghezza adattata al contenuto dello svaso */
    margin: 20px auto;
    background-color: var(--white-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.tab-nav {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    background-color: var(--medium-bg);
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 10;
    align-items: center;
}

h1 { 
    text-align: center;
    padding: 20px 15px 15px 15px; 
    margin: 0;
    font-size: 1.8em; 
    color: var(--primary-color);
}

h2 {
    color: var(--primary-color);
    margin-top: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    font-size: 1.6em;
    margin-bottom: 25px;
}

h3 {
    text-align: center;
    color: var(--medium-text);
    margin-top: 25px;
}

hr { border: none; border-top: 1px solid var(--border-color); margin: 25px 0; }

/* --- Sistema a Schede (Tabs) (DAL Q-SYSTEM) --- */
.tab-link {
    padding: 15px 20px;
    cursor: pointer;
    border: none;
    background-color: transparent;
    font-size: 1.0em;
    font-weight: 600;
    color: var(--medium-text);
    transition: background-color 0.2s, color 0.2s, border-bottom 0.2s;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    white-space: nowrap;
    flex-shrink: 0;
}
.tab-link:hover { color: var(--primary-color); background-color: #dde2e7; }
.tab-link.active { color: var(--primary-color); border-bottom: 3px solid var(--primary-color); background-color: var(--white-bg); }
.tab-content { padding: 30px 40px; display: none; animation: fadeIn 0.5s; }
.tab-content[style*="block"] { display: block; } /* Compatibilità con JS esistente */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* --- Stili Form (ADATTATI) --- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.form-group { display: flex; flex-direction: column; margin-bottom: 15px; }
label { margin-bottom: 8px; font-weight: 500; color: var(--medium-text); }
input[type="text"], input[type="date"], input[type="number"] {
    width: 100%; padding: 12px 15px; border: 1px solid var(--border-color);
    border-radius: var(--border-radius); box-sizing: border-box;
    font-size: 1em; background-color: var(--white-bg); color: var(--dark-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.2);
    outline: none;
}
input:disabled { background-color: #e9ecef; cursor: not-allowed; }

/* --- STILI SPECIFICI SVASO (ADATTATI AL NUOVO TEMA) --- */

/* --- Cronometro e Tabella Scorrevole --- */
#stopwatch-container { 
    text-align: center; padding: 20px; margin: 20px 0 15px 0; 
    background-color: var(--light-bg); border-radius: var(--border-radius); 
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease-in-out; 
}
#stopwatch-container.sticky { 
    position: sticky; top: 0; z-index: 1000; 
    box-shadow: 0 5px 15px rgba(26, 229, 4, 0.781); /* Ombra verde acqua del tema Q */
    background-color: var(--light-bg);
}
#stopwatchDisplay { 
    font-family: 'Courier New', Courier, monospace; font-size: 2.5em; font-weight: bold; 
    color: var(--primary-color); margin: 10px 0 20px 0; 
}
.stopwatch-controls { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.table-scroll-container { max-height: 25vh; overflow-y: auto; border: 1px solid var(--border-color); border-radius: var(--border-radius); margin-bottom: 20px; }

/* --- Bottoni (STILI Q-SYSTEM) --- */
button { 
    padding: 12px 25px; border: none; border-radius: var(--border-radius); cursor: pointer; 
    font-size: 1em; font-weight: 600; transition: all 0.2s; color: white; 
    width: 100%; box-sizing: border-box; margin-top: 10px; 
}
.stopwatch-controls button, .tab-nav button, #loadJsonButton, .chart-controls button { width: auto; margin-top: 0; }
button.primary { background-color: var(--primary-color); }
button.success { background-color: var(--success-color); }
button.secondary { background-color: var(--secondary-color); }
button.danger { background-color: var(--danger-color); }
button.info { background-color: var(--info-color); }
button:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
button:disabled { background-color: #ccc; cursor: not-allowed; transform: none; box-shadow: none; }

/* --- Tabelle --- */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; border-bottom: 1px solid var(--border-color); text-align: center; vertical-align: middle; }
th { background-color: var(--light-bg); font-weight: 600; }
#dataTable input { text-align: center; }
#dataTable tr:last-child td, #slopeResultsTable tr:last-child td { border-bottom: none; }
#dataTable button { width: auto; padding: 5px 10px; font-size: 0.9em; margin-top: 0; }
#slopeResultsTable td:nth-child(2), #slopeResultsTable td:nth-child(3) { font-family: 'Courier New', monospace; font-weight: bold; }

/* --- Contenuti Risultati --- */
#results-placeholder { text-align: center; color: var(--medium-text); padding: 40px; background: var(--light-bg); border-radius: var(--border-radius); }
.results-grid { display: grid; grid-template-columns: 1fr; gap: 25px; margin-top: 20px; }
.results-container { padding: 20px; border: 1px solid var(--border-color); border-radius: var(--border-radius); }
.full-width { grid-column: 1 / -1; }
.chart-controls { text-align: center; margin-bottom: 20px; }
.chart-container { position: relative; height: 450px; }
.analysis-result { margin-top: 15px; padding: 12px; border-radius: var(--border-radius); font-weight: bold; text-align: center; border-left: 4px solid; }
#intervalSlopeResult { border-color: var(--info-color); background-color: #e2f8ff; color: #0c5460; }
#slopeMessages .error-message { 
    margin-top: 15px; padding: 12px; background-color: #f8d7da; 
    color: #721c24; border-left: 4px solid var(--danger-color); 
    border-radius: var(--border-radius); text-align: left;
}

/* --- Media Queries (DAL Q-SYSTEM) --- */
@media (min-width: 900px) { 
    .results-grid { grid-template-columns: repeat(2, 1fr); } 
}
@media (max-width: 768px) {
    body { padding: 0; }
    .tab-container { border-radius: 0; margin: 0; max-width: 100%; }
    h1 { font-size: 1.5em; }
    .tab-nav { flex-wrap: wrap; }
    .tab-link { flex-grow: 1; }
    .tab-content { padding: 20px; }
    #stopwatchDisplay { font-size: 2em; }
    .table-scroll-container { max-height: 35vh; }
}