/* ============================================================================
   GLASSMORPHISM.CSS - Effetti Vetro/Trasparenza
   ============================================================================

   Il "glassmorphism" è uno stile di design che simula vetro smerigliato:
   - Background semi-trasparente
   - Blur dello sfondo (backdrop-filter)
   - Bordi sottili e luminosi
   - Ombre morbide

   Compatibilità: Chrome, Edge, Safari (Firefox limitato)
   ---------------------------------------------------------------------------- */

/* ----------------------------------------------------------------------------
   CLASSE BASE GLASS
   ---------------------------------------------------------------------------- */
.glass {
    /* Background semi-trasparente */
    background: rgba(255, 255, 255, 0.25);

    /* Effetto blur dello sfondo */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* Safari */

    /* Bordo sottile luminoso */
    border: 1px solid rgba(255, 255, 255, 0.18);

    /* Ombra morbida */
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

    /* Angoli arrotondati */
    border-radius: 12px;
}

/* Frosted glass per modal dettaglio prodotto */
.modal-content.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* ----------------------------------------------------------------------------
   VARIANTI GLASS
   ---------------------------------------------------------------------------- */

/* Glass Forte (più opaco) */
.glass-strong {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.45);
    border-radius: 12px;
}

/* Glass Leggero (più trasparente) */
.glass-light {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px 0 rgba(31, 38, 135, 0.2);
    border-radius: 12px;
}

/* Glass Scuro (per tema dark) */
.glass-dark {
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    border-radius: 12px;
}

/* ----------------------------------------------------------------------------
   CARD GLASS
   ---------------------------------------------------------------------------- */
.glass-card {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.45);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ----------------------------------------------------------------------------
   BOTTONE GLASS
   ---------------------------------------------------------------------------- */
.glass-button {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.glass-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(31, 38, 135, 0.4);
}

.glass-button:active {
    transform: translateY(0);
}

/* ----------------------------------------------------------------------------
   NAVBAR GLASS
   ---------------------------------------------------------------------------- */
.glass-navbar {
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 4px 16px 0 rgba(31, 38, 135, 0.2);
    padding: 1rem 0;
}

/* ----------------------------------------------------------------------------
   MODAL GLASS
   ---------------------------------------------------------------------------- */
.glass-modal {
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 16px 48px 0 rgba(31, 38, 135, 0.5);
    border-radius: 20px;
    padding: 2rem;
    max-width: 600px;
    width: 90%;
}

/* ----------------------------------------------------------------------------
   INPUT GLASS
   ---------------------------------------------------------------------------- */
.glass-input {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.glass-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.glass-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* ----------------------------------------------------------------------------
   SIDEBAR GLASS
   ---------------------------------------------------------------------------- */
.glass-sidebar {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-right: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 4px 0 16px 0 rgba(31, 38, 135, 0.2);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
}

/* ----------------------------------------------------------------------------
   DROPDOWN MENU GLASS
   ---------------------------------------------------------------------------- */
.dropdown-menu.glass {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    border-radius: 8px;
}

.dropdown-menu.glass .dropdown-item {
    color: #2d3748;
    transition: background-color 0.2s;
}

.dropdown-menu.glass .dropdown-item:hover {
    background-color: rgba(245, 158, 11, 0.15);
    color: var(--primary, #f59e0b);
}

.dropdown-menu.glass .dropdown-item:active,
.dropdown-menu.glass .dropdown-item.active {
    background: var(--gradient-primary);
    color: white;
}

.dropdown-menu.glass .dropdown-divider {
    border-color: rgba(245, 158, 11, 0.2);
}

/* ----------------------------------------------------------------------------
   BADGE GLASS
   ---------------------------------------------------------------------------- */
.glass-badge {
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    display: inline-block;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* ----------------------------------------------------------------------------
   TOOLTIP GLASS
   ---------------------------------------------------------------------------- */
.glass-tooltip {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    color: white;
    font-size: 0.875rem;
    position: absolute;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ----------------------------------------------------------------------------
   LOADING GLASS
   ---------------------------------------------------------------------------- */
.glass-loading {
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* ----------------------------------------------------------------------------
   FALLBACK PER BROWSER SENZA BACKDROP-FILTER
   ---------------------------------------------------------------------------- */
@supports not (backdrop-filter: blur(10px)) {
    .glass,
    .glass-strong,
    .glass-light,
    .glass-dark,
    .glass-card,
    .glass-button,
    .glass-navbar,
    .glass-modal,
    .glass-input,
    .glass-sidebar,
    .glass-badge,
    .glass-tooltip,
    .glass-loading {
        /* Fallback: background più opaco */
        background: rgba(255, 255, 255, 0.85);
    }

    .glass-dark {
        background: rgba(0, 0, 0, 0.85);
    }
}

/* ----------------------------------------------------------------------------
   TEMA SCURO
   ---------------------------------------------------------------------------- */
[data-theme="dark"] .glass {
    background: rgba(30, 30, 30, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .glass-card {
    background: rgba(30, 30, 30, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .glass-button {
    background: rgba(50, 50, 50, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ----------------------------------------------------------------------------
   ESEMPI DI USO
   ----------------------------------------------------------------------------

   CARD SEMPLICE:
   <div class="glass" style="padding: 2rem;">
       <h3>Titolo Card</h3>
       <p>Contenuto con effetto vetro</p>
   </div>

   BOTTONE:
   <button class="glass-button">
       Click Me
   </button>

   INPUT:
   <input type="text" class="glass-input" placeholder="Username">

   ---------------------------------------------------------------------------- */