/**
 * public/assets/css/main.css
 * Stili globali, variabili CSS, reset e tipografia.
 */

/* ============================================================
   VARIABILI CSS
   ============================================================ */
:root {
    /* Palette colori */
    --color-primary       : #2563EB;
    --color-primary-dark  : #1D4ED8;
    --color-primary-light : #DBEAFE;
    --color-secondary     : #64748B;
    --color-success       : #16A34A;
    --color-success-light : #DCFCE7;
    --color-warning       : #D97706;
    --color-warning-light : #FEF3C7;
    --color-danger        : #DC2626;
    --color-danger-light  : #FEE2E2;
    --color-info          : #0284C7;
    --color-info-light    : #E0F2FE;

    /* Colori neutri */
    --color-white   : #FFFFFF;
    --color-gray-50 : #F8FAFC;
    --color-gray-100: #F1F5F9;
    --color-gray-200: #E2E8F0;
    --color-gray-300: #CBD5E1;
    --color-gray-400: #94A3B8;
    --color-gray-500: #64748B;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1E293B;
    --color-gray-900: #0F172A;

    /* Testo */
    --text-primary  : var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --text-muted    : var(--color-gray-400);

    /* Sfondi */
    --bg-body   : var(--color-gray-50);
    --bg-surface: var(--color-white);
    --bg-sidebar: var(--color-gray-900);
    --bg-subtle : var(--color-gray-100);

    /* Bordi */
    --border-color : var(--color-gray-200);
    --border-radius: 10px;
    --border-radius-lg: 16px;
    --border-radius-sm: 4px;

    /* Ombre modern, più diffuse e morbide */
    --shadow-sm : 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.03);
    --shadow    : 0 1px 3px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.05);
    --shadow-md : 0 4px 12px -2px rgba(0,0,0,0.08), 0 6px 16px -4px rgba(0,0,0,0.06);
    --shadow-lg : 0 12px 24px -4px rgba(0,0,0,0.12), 0 8px 32px -8px rgba(0,0,0,0.08);

    /* Tipografia */
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-xs  : 0.75rem;
    --font-size-sm  : 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg  : 1.125rem;
    --font-size-xl  : 1.25rem;
    --font-size-2xl : 1.5rem;
    --font-size-3xl : 1.875rem;

    /* Transizioni */
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Glassmorphism */
    --glass-bg: rgba(255,255,255,0.75);
    --glass-border: rgba(255,255,255,0.5);
    --glass-blur: blur(16px);

    /* Focus ring moderna */
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.2);
    --focus-ring-dark: 0 0 0 3px rgba(96, 165, 250, 0.25);

    /* Sidebar, Header */
    --sidebar-width       : 260px;
    --sidebar-collapsed-w : 64px;
    --header-height: 64px;
}

/* ============================================================
   TEMA SCURO — variabili di override
   ============================================================ */
[data-theme="dark"] {
    --text-primary  : #E2E8F0;
    --text-secondary: #94A3B8;
    --text-muted    : #64748B;

    --bg-body   : #0D1117;
    --bg-surface: #161B22;
    --bg-sidebar: #0D1117;
    --bg-subtle : var(--color-gray-200);

    --border-color: #30363D;

    --color-gray-50 : #161B22;
    --color-gray-100: #1C2128;
    --color-gray-200: #30363D;
    --color-gray-300: #48576B;
    --color-gray-400: #6E7D91;
    --color-gray-500: #8B9AB0;

    --color-primary-light: rgba(37, 99, 235, 0.2);
    --color-success-light: rgba(22, 163, 74, 0.2);
    --color-warning-light: rgba(217, 119, 6, 0.15);
    --color-danger-light : rgba(220, 38, 38, 0.2);
    --color-info-light   : rgba(2, 132, 199, 0.15);

    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.4);
    --shadow   : 0 1px 3px 0 rgba(0,0,0,0.5), 0 1px 2px -1px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5), 0 2px 4px -2px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.5);
}

/* Pulsante secondario */
[data-theme="dark"] .btn-secondary {
    background  : var(--color-gray-100);
    border-color: var(--border-color);
}
[data-theme="dark"] .btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-200);
}

/* Input / form */
[data-theme="dark"] .form-control {
    background  : var(--color-gray-100);
    border-color: var(--border-color);
    color       : var(--text-primary);
}
[data-theme="dark"] .form-control:disabled {
    background: var(--color-gray-50);
    color     : var(--text-muted);
}

/* Loading overlay */
[data-theme="dark"] .loading-overlay {
    background: rgba(13, 17, 23, 0.85);
}

/* Card login */
[data-theme="dark"] .login-card {
    background: var(--bg-surface);
}

/* Alert — testi hardcoded su toni scuri, non leggibili su sfondo scuro */
[data-theme="dark"] .alert-success { color: #86EFAC; }
[data-theme="dark"] .alert-danger  { color: #FCA5A5; }
[data-theme="dark"] .alert-warning { color: #FCD34D; }
[data-theme="dark"] .alert-info    { color: #7DD3FC; }

/* Paginazione */
[data-theme="dark"] .page-btn {
    background  : var(--color-gray-100);
    color       : var(--text-primary);
    border-color: var(--border-color);
}
[data-theme="dark"] .page-btn:hover:not(:disabled) { background: var(--color-gray-200); }
[data-theme="dark"] .page-btn.active {
    background  : var(--color-primary);
    color       : white;
    border-color: var(--color-primary);
}

/* Tabella: riga hover (gray-50 diventa uguale a surface in dark, va alzata) */
[data-theme="dark"] .data-table tbody tr:hover { background: var(--color-gray-100); }

/* Footer card/modal (gray-50 = surface in dark, rende invisibile il separatore) */
[data-theme="dark"] .card-footer  { background: var(--color-gray-100); }
[data-theme="dark"] .modal-footer { background: var(--color-gray-100); }
[data-theme="dark"] .filters-bar  { background: var(--color-gray-100); }

/* ============================================================
   DIMENSIONE TESTO
   ============================================================ */
html[data-font-size="large"]   { font-size: 17px; }
html[data-font-size="x-large"] { font-size: 19px; }

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family  : var(--font-family);
    font-size    : var(--font-size-base);
    color        : var(--text-primary);
    background   : var(--bg-body);
    line-height  : 1.5;
    min-height   : 100vh;
    /* `clip` invece di `hidden`: previene l'overflow orizzontale senza
       creare uno scroll container che spezzerebbe position:sticky. */
    overflow-x   : clip;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color          : var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

img, svg {
    display: block;
    max-width: 100%;
}

button {
    font-family: inherit;
    cursor     : pointer;
}

input, select, textarea {
    font-family: inherit;
    font-size  : inherit;
}

/* ============================================================
   TIPOGRAFIA
   ============================================================ */
h1 { font-size: var(--font-size-3xl); font-weight: 700; line-height: 1.2; }
h2 { font-size: var(--font-size-2xl); font-weight: 600; line-height: 1.3; }
h3 { font-size: var(--font-size-xl);  font-weight: 600; line-height: 1.4; }
h4 { font-size: var(--font-size-lg);  font-weight: 600; }
h5 { font-size: var(--font-size-base); font-weight: 600; }
h6 { font-size: var(--font-size-sm);  font-weight: 600; }

/* ============================================================
   UTILITY CLASSI
   ============================================================ */
.text-primary    { color: var(--color-primary); }
.text-success    { color: var(--color-success); }
.text-danger     { color: var(--color-danger); }
.text-warning    { color: var(--color-warning); }
.text-muted      { color: var(--text-muted); }
.text-sm         { font-size: var(--font-size-sm); }
.text-xs         { font-size: var(--font-size-xs); }
.text-bold       { font-weight: 600; }
.text-center     { text-align: center; }
.text-right      { text-align: right; }

.mt-1  { margin-top: 0.25rem; }
.mt-2  { margin-top: 0.5rem; }
.mt-4  { margin-top: 1rem; }
.mt-6  { margin-top: 1.5rem; }
.mb-2  { margin-bottom: 0.5rem; }
.mb-4  { margin-bottom: 1rem; }
.mb-6  { margin-bottom: 1.5rem; }
.ml-2  { margin-left: 0.5rem; }
.mr-2  { margin-right: 0.5rem; }

.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }

.flex          { display: flex; }
.flex-col      { flex-direction: column; }
.items-center  { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end   { justify-content: flex-end; }
.flex-wrap     { flex-wrap: wrap; }
.flex-1        { flex: 1; }

.hidden  { display: none !important; }
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); border: 0;
}

/* ============================================================
   BOTTONI
   ============================================================ */
.btn {
    display        : inline-flex;
    align-items    : center;
    justify-content: center;
    gap            : 0.375rem;
    padding        : 0.55rem 1.1rem;
    font-size      : var(--font-size-sm);
    font-weight    : 600;
    border         : 1px solid transparent;
    border-radius  : var(--border-radius);
    transition     : background var(--transition), color var(--transition), border-color var(--transition), transform 0.08s ease, box-shadow var(--transition);
    white-space    : nowrap;
    user-select    : none;
    text-decoration: none;
}
.btn:disabled {
    opacity: 0.55;
    cursor : not-allowed;
}
.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color     : var(--color-white);
    border-color: transparent;
    box-shadow: 0 4px 12px -4px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #1d4ed8, #1e40af);
    transform : translateY(-1px);
    box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.45);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background  : var(--color-white);
    color       : var(--text-primary);
    border-color: var(--border-color);
    box-shadow  : 0 1px 2px rgba(0,0,0,0.03);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-gray-50); border-color: var(--color-gray-300); box-shadow: 0 2px 6px rgba(0,0,0,0.04); transform: translateY(-1px); }

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color     : var(--color-white);
    box-shadow: 0 4px 12px -4px rgba(220, 38, 38, 0.35);
}
.btn-danger:hover:not(:disabled) { background: linear-gradient(135deg, #b91c1c, #991b1b); transform: translateY(-1px); box-shadow: 0 8px 20px -4px rgba(220, 38, 38, 0.45); }

.btn-success {
    background: linear-gradient(135deg, #16a34a, #059669);
    color     : var(--color-white);
    box-shadow: 0 4px 12px -4px rgba(22, 163, 74, 0.35);
}
.btn-success:hover:not(:disabled) { background: linear-gradient(135deg, #15803d, #047857); transform: translateY(-1px); box-shadow: 0 8px 20px -4px rgba(22, 163, 74, 0.45); }

.btn-sm {
    padding    : 0.25rem 0.75rem;
    font-size  : var(--font-size-xs);
}

.btn-icon {
    padding  : 0.5rem;
    min-width: 36px;
    height   : 36px;
}

/* ============================================================
   FORM
   ============================================================ */
.form-group {
    display       : flex;
    flex-direction: column;
    gap           : 0.375rem;
}

.form-label {
    font-size  : var(--font-size-sm);
    font-weight: 500;
    color      : var(--text-primary);
}
.form-label .required {
    color     : var(--color-danger);
    margin-left: 2px;
}

.form-control {
    width        : 100%;
    padding      : 0.7rem 0.9rem;
    font-size    : var(--font-size-sm);
    color        : var(--text-primary);
    background   : var(--color-white);
    border       : 1.5px solid var(--border-color);
    border-radius: var(--border-radius);
    transition   : border-color var(--transition), box-shadow var(--transition), transform 0.15s ease;
    outline      : none;
}
.form-control:hover {
    border-color: #cbd5e1;
}
.form-control:focus {
    border-color: var(--color-primary);
    box-shadow  : var(--focus-ring);
    transform   : translateY(-1px);
}
.form-control:disabled {
    background: var(--color-gray-100);
    color     : var(--text-muted);
}
.form-control.error { border-color: var(--color-danger); }

.form-error {
    font-size: var(--font-size-xs);
    color    : var(--color-danger);
}

.form-hint {
    font-size: var(--font-size-xs);
    color    : var(--text-muted);
}

select.form-control { cursor: pointer; }

textarea.form-control { min-height: 100px; resize: vertical; }

/* ============================================================
   BADGE / STATUS
   ============================================================ */
.badge {
    display      : inline-flex;
    align-items  : center;
    padding      : 0.125rem 0.5rem;
    font-size    : var(--font-size-xs);
    font-weight  : 500;
    border-radius: 9999px;
    white-space  : nowrap;
}
.badge-success { background: var(--color-success-light); color: var(--color-success); }
.badge-danger  { background: var(--color-danger-light);  color: var(--color-danger); }
.badge-warning { background: var(--color-warning-light); color: var(--color-warning); }
.badge-info    { background: var(--color-info-light);    color: var(--color-info); }
.badge-gray    { background: var(--color-gray-100);      color: var(--color-gray-600); }

/* ============================================================
   SPINNER
   ============================================================ */
.spinner {
    display     : inline-block;
    width       : 20px;
    height      : 20px;
    border      : 2px solid var(--color-gray-200);
    border-top  : 2px solid var(--color-primary);
    border-radius: 50%;
    animation   : spin 0.7s linear infinite;
}
.spinner-sm { width: 14px; height: 14px; border-width: 2px; }
.spinner-white {
    border-color    : rgba(255,255,255,0.3);
    border-top-color: white;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   ALERT / NOTIFICHE
   ============================================================ */
.alert {
    display     : flex;
    align-items : flex-start;
    gap         : 0.75rem;
    padding     : 0.875rem 1rem;
    border-radius: var(--border-radius-sm);
    font-size   : var(--font-size-sm);
    margin-bottom: 1rem;
}
.alert-success { background: var(--color-success-light); color: #14532D; }
.alert-danger  { background: var(--color-danger-light);  color: #7F1D1D; }
.alert-warning { background: var(--color-warning-light); color: #78350F; }
.alert-info    { background: var(--color-info-light);    color: #0C4A6E; }

/* ============================================================
   CARD
   ============================================================ */
.card {
    background   : var(--bg-surface);
    border       : 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow   : var(--shadow-sm);
    transition   : box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }

.card-header {
    padding     : 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display     : flex;
    align-items : center;
    justify-content: space-between;
    gap         : 0.75rem;
    flex-wrap   : wrap;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding    : 1rem 1.5rem;
    border-top : 1px solid var(--border-color);
    background : var(--color-gray-50);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
    display       : flex;
    flex-direction: column;
    align-items   : center;
    justify-content: center;
    padding       : 3rem 1rem;
    text-align    : center;
    color         : var(--text-muted);
    gap           : 0.75rem;
}
.empty-state svg { width: 48px; height: 48px; opacity: 0.4; }
.empty-state p   { font-size: var(--font-size-sm); }

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.loading-overlay {
    position       : absolute;
    inset          : 0;
    background     : rgba(255,255,255,0.8);
    display        : flex;
    align-items    : center;
    justify-content: center;
    z-index        : 10;
    border-radius  : inherit;
}

/* ============================================================
   TOOLTIP
   ============================================================ */
[data-tooltip] {
    position: relative;
}
[data-tooltip]::after {
    content      : attr(data-tooltip);
    position     : absolute;
    bottom       : calc(100% + 6px);
    left         : 50%;
    transform    : translateX(-50%);
    background   : var(--color-gray-900);
    color        : white;
    font-size    : var(--font-size-xs);
    padding      : 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    white-space  : nowrap;
    pointer-events: none;
    opacity      : 0;
    transition   : opacity var(--transition);
    z-index      : 1000;
}
[data-tooltip]:hover::after { opacity: 1; }