:root {
    --color-primary: #2b6cb0;
    --color-primary-dark: #1a4971;
    --color-danger: #c53030;
    --color-success: #2f855a;
    --color-warning: #b7791f;
    --color-bg: #f5f7fa;
    --color-border: #d9e0e7;
    --color-text: #1a202c;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

/* L'attributo hidden deve sempre vincere sulle regole display:flex/inline-block
   di .modal/.btn/.camera-panel ecc. (senza !important l'esito dipende
   dall'ordine delle regole nel file e causa elementi "nascosti" che restano
   visibili e intercettano i click). */
[hidden] { display: none !important; }

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    background: var(--color-primary-dark);
    color: #fff;
    padding: 0.75rem 1.25rem;
}

.topbar-brand { font-weight: bold; font-size: 1.1rem; }
.topbar-nav a { color: #fff; margin-right: 1rem; text-decoration: none; padding: 0.25rem 0; border-bottom: 2px solid transparent; }
.topbar-nav a:hover { border-bottom-color: rgba(255,255,255,0.5); }
.topbar-nav a.active { font-weight: 600; border-bottom-color: #fff; }
.topbar-user { display: flex; align-items: center; gap: 0.75rem; font-size: 0.9rem; }

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: #e2e8f0; color: var(--color-text); }
.btn-secondary:hover { background: #cbd5e0; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #9b2c2c; }
.btn-link { background: none; border: none; color: var(--color-primary); cursor: pointer; text-decoration: underline; padding: 0; font-size: 0.9rem; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.table { width: 100%; border-collapse: collapse; margin-top: 1rem; background: #fff; }
.table th, .table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--color-border); text-align: left; }
.table th { background: #edf2f7; }
.table tr.row-expandable { cursor: pointer; }
.table tr.row-expandable:hover { background: #f0f4f8; }

.badge { padding: 0.15rem 0.5rem; border-radius: 10px; font-size: 0.8rem; color: #fff; }
.badge-aperto { background: var(--color-success); }
.badge-sospeso { background: var(--color-warning); }
.badge-chiuso { background: #718096; }

.panel { background: #fff; border: 1px solid var(--color-border); border-radius: 6px; padding: 1rem; margin-top: 1.5rem; }
.panel-header { display: flex; justify-content: space-between; align-items: center; }
.cards { display: flex; gap: 1rem; margin-top: 1rem; }
.card { background: #fff; border: 1px solid var(--color-border); border-radius: 6px; padding: 1rem 1.5rem; text-align: center; }
.card h2 { margin: 0; font-size: 2rem; color: var(--color-primary); }

.flash { padding: 0.6rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.flash-error { background: #fed7d7; color: #822727; }
.flash-success { background: #c6f6d5; color: #22543d; }

.login-box { max-width: 360px; margin: 4rem auto; background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,0.1); }
.login-box form { display: flex; flex-direction: column; gap: 0.5rem; }
.login-box label { font-weight: 600; margin-top: 0.5rem; }
.login-box input, form input[type=text], form input[type=password], form input[type=number], form select {
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    width: 100%;
}

.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal-content { background: #fff; padding: 1.5rem; border-radius: 8px; width: 90%; max-width: 420px; max-height: 85vh; overflow-y: auto; }
.modal-content.modal-wide { max-width: 700px; }
.modal-content form { display: flex; flex-direction: column; gap: 0.4rem; }
.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1rem; }
.checkbox-list { max-height: 200px; overflow-y: auto; border: 1px solid var(--color-border); border-radius: 4px; padding: 0.5rem; }
.checkbox-item { display: block; font-weight: normal; margin: 0.25rem 0; }

.form-page { max-width: 520px; }
.form-page form { display: flex; flex-direction: column; gap: 0.4rem; }
.form-page .form-actions { display: flex; justify-content: flex-start; gap: 0.5rem; margin-top: 1.25rem; }
.page-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 0.5rem; }
.breadcrumb { color: #666; font-size: 0.9rem; margin: 0 0 0.5rem; }
.breadcrumb a { color: var(--color-primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.tabs { display: flex; gap: 0.5rem; margin-top: 1.5rem; border-bottom: 2px solid var(--color-border); }
.tab-btn { background: none; border: none; padding: 0.6rem 1rem; cursor: pointer; font-size: 1rem; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab-btn.active { border-bottom-color: var(--color-primary); font-weight: bold; color: var(--color-primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.toolbar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 1rem 0; }

.session-list { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; }
.session-card { display: block; background: #fff; border: 1px solid var(--color-border); border-radius: 8px; padding: 1rem 1.5rem; text-decoration: none; color: var(--color-text); min-width: 220px; }
.session-card:hover { border-color: var(--color-primary); }

.counter-header { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.counter-stats { display: flex; gap: 1rem; margin: 1rem 0; }
.counter-stats .stat { background: #fff; border: 1px solid var(--color-border); border-radius: 6px; padding: 0.75rem 1.5rem; text-align: center; }
.counter-stats .stat span { display: block; font-size: 1.8rem; font-weight: bold; color: var(--color-primary); }
.counter-stats .stat label { font-size: 0.85rem; color: #666; }

.scan-panel { background: #fff; border: 1px solid var(--color-border); border-radius: 6px; padding: 1rem; margin-top: 1rem; }
#scan-form { display: flex; gap: 0.5rem; align-items: flex-end; flex-wrap: wrap; }
#scan-form label { display: none; }
#scan-input { flex: 1; min-width: 200px; font-size: 1.1rem; padding: 0.6rem; }
.scan-feedback { margin-top: 0.5rem; font-weight: 600; min-height: 1.5em; }
.scan-feedback.ok { color: var(--color-success); }
.scan-feedback.error { color: var(--color-danger); }

.camera-panel { margin-top: 1rem; display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
#camera-reader { width: 100%; max-width: 480px; }
.btn-camera-hold {
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    width: 100%;
    max-width: 480px;
    touch-action: none;
    user-select: none;
}
.btn-camera-hold.active { background: var(--color-danger); }

.import-status { margin-top: 0.75rem; padding: 0.5rem 0.75rem; border-radius: 4px; background: #edf2f7; }
.import-status-ok { background: #c6f6d5; color: #22543d; }
.import-status-error { background: #fed7d7; color: #822727; }

@media (max-width: 640px) {
    .topbar { flex-direction: column; align-items: flex-start; }
    .cards { flex-direction: column; }
    .table { display: block; overflow-x: auto; white-space: nowrap; }
}