/**
 * D-One Platform - Button Component System
 * 
 * Sistema unificato per tutti i pulsanti della piattaforma
 * Versione: 1.0
 * Data: 2025-10-19
 * 
 * Uso:
 * <a href="#" class="btn-platform btn-primary">Azione Primaria</a>
 * <button class="btn-platform btn-secondary">Azione Secondaria</button>
 * <a href="#" class="btn-platform btn-tertiary btn-sm">Piccolo</a>
 */

/* BASE BUTTON STRUCTURE */
.btn-platform {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem; /* Ridotto da 0.875rem 1.5rem - meno "pacchiano" */
    border-radius: 12px;
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem; /* Ridotto da 0.95rem */
    line-height: 1.4;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

.btn-platform:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
}

.btn-platform:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* PRIMARY BUTTON (Gradient) */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-2-hover, #8b7ed8) 100%);
    color: white;
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 8px 25px rgba(108, 92, 231, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}

/* SECONDARY BUTTON (Outline) */
.btn-secondary {
    background: var(--bg-body);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--primary);

    text-decoration: none;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.15);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* TERTIARY BUTTON (Ghost/Text) */
.btn-tertiary {
    background: transparent;
    color: var(--primary);
    border: 1px solid transparent;
}

.btn-tertiary:hover {
    background: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-tertiary:active {
    transform: translateY(0);
}

/* DANGER BUTTON */
.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.3);
}

/* SUCCESS BUTTON */
.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    color: white;
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

/* SIZE VARIANTS */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

.btn-md {
    /* Default size - already defined in .btn-platform */
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem; /* Ridotto da 1rem 2rem - meno "pacchiano" */
    font-size: 0.95rem; /* Ridotto da 1.05rem */
    border-radius: 14px;
}

/* COMPACT VARIANT (Più piccolo e spazioso) */
.btn-compact {
    padding: 0.6rem 1.0rem;
    font-size: 0.9rem;
    border-radius: 10px;
}

/* FULL WIDTH */
.btn-block {
    width: 100%;
    display: flex;
}

/* ICON SUPPORT */
.btn-platform i,
.btn-platform svg {
    font-size: 1.1em;
}

.btn-platform.icon-only {
    padding: 0.875rem;
    aspect-ratio: 1;
}

.btn-sm.icon-only {
    padding: 0.5rem;
}

.btn-lg.icon-only {
    padding: 1rem;
}

/* LOADING STATE */
.btn-platform.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-platform.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    animation: btn-spin 0.6s linear infinite;
}

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

/* BUTTON GROUP */
.btn-group {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn-group.vertical {
    flex-direction: column;
    align-items: stretch;
}

.btn-group.attached {
    gap: 0;
}

.btn-group.attached .btn-platform {
    border-radius: 0;
}

.btn-group.attached .btn-platform:first-child {
    border-top-left-radius: 12px;
    border-bottom-left-radius: 12px;
}

.btn-group.attached .btn-platform:last-child {
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
}

/* BUTTON GROUP CONTAINER (Centralizzato v1.0) */
.btn-group-container {
    display: flex;
    gap: var(--space-2, 0.5rem);
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
}

.btn-group-container .btn-platform,
.btn-group-container .btn,
.btn-group-container button {
    flex-shrink: 0;
}

/* Variant: Spazio tra gruppi */
.btn-group-container.spacious {
    gap: var(--space-3, 0.75rem);
}

/* Variant: Spread (distribuisci nello spazio disponibile) */
.btn-group-container.spread {
    justify-content: space-between;
    width: 100%;
}

/* Variant: Centered */
.btn-group-container.centered {
    justify-content: center;
}

/* Variant: Right-aligned */
.btn-group-container.right {
    justify-content: flex-end;
}

/* Variant: Vertical stack */
.btn-group-container.vertical {
    flex-direction: column;
    align-items: flex-start;
}

.btn-group-container.vertical.center {
    align-items: center;
}

.btn-group-container.vertical.stretch {
    align-items: stretch;
}

.btn-group-container.vertical.stretch .btn-platform,
.btn-group-container.vertical.stretch .btn {
    width: 100%;
}

/* Responsive: Stack verticalmente su mobile */
@media (max-width: 768px) {
    .btn-group-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-group-container .btn-platform,
    .btn-group-container .btn,
    .btn-group-container button {
        width: 100%;
        justify-content: center;
    }
    
    /* Eccetto se esplicitamente horizontal */
    .btn-group-container.horizontal {
        flex-direction: row;
        align-items: center;
    }
    
    .btn-group-container.horizontal .btn-platform,
    .btn-group-container.horizontal .btn {
        width: auto;
    }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .btn-platform {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .btn-group:not(.vertical) {
        flex-wrap: wrap;
    }
}

/* THEME SPECIFIC OVERRIDES */
.btn-platform[data-theme="agents"] {
    --primary: #9458cf;
    --primary-2: #6747b4;
    --primary-hover: #7d3fb8;
}

.btn-platform[data-theme="services"] {
    --primary: #6c5ce7;
    --primary-2: #a29bfe;
    --primary-hover: #5a4fcf;
}

.btn-platform[data-theme="kb"] {
    --primary: #10b981;
    --primary-2: #06b6d4;
    --primary-hover: #059669;
}

.btn-platform[data-theme="tools"] {
    --primary: #f59e0b;
    --primary-2: #ef4444;
    --primary-hover: #d97706;
}

/* ========================================
   ICON & ACTION BUTTONS (Stile Portale - Fine e Leggero)
   Separati dai buttons classici, ispirati ai Quick Navigation Component
   ======================================== */

/* Icon Button (stile portale - fine e leggero) */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.6rem;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    height: 2.25rem;
    min-width: 2.25rem;
    overflow: hidden;
    text-decoration: none;
}

/* Effetto gradiente hover - stile elegante come quick-nav-item */
.btn-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.btn-icon:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
    border-color: var(--primary);
}

.btn-icon:hover::before {
    opacity: 1;
}

.btn-icon:active {
    transform: translateY(0);
}

.btn-icon i {
    font-size: 1.1em;
    opacity: 0.8;
    transition: transform var(--transition-base);
}

.btn-icon:hover i {
    transform: scale(1.1);
    opacity: 1;
}

/* Icon Button Sizes */
.btn-icon.btn-sm {
    padding: 0.4rem 0.5rem;
    height: 2rem;
    min-width: 2rem;
    font-size: var(--font-size-xs);
}

.btn-icon.btn-lg {
    padding: 0.6rem 0.75rem;
    height: 2.5rem;
    min-width: 2.5rem;
    font-size: var(--font-size-base);
}

/* Icon Button - Solo icona (circolare) */
.btn-icon.icon-only {
    width: 2.25rem;
    height: 2.25rem;
    min-width: 2.25rem;
    padding: 0;
    border-radius: 50%;
}

.btn-icon.icon-only.btn-sm {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
}

.btn-icon.icon-only.btn-lg {
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
}

/* Quick Action Button (quadrato con icona) */
.quick-action-btn {
    width: 44px;
    height: 44px;
    min-height: 44px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    position: relative;
    flex-shrink: 0;
}

.quick-action-btn:hover {
    background: var(--bg-surface-alt);
    color: var(--primary);
    transform: scale(1.05);
}

.quick-action-btn:active {
    transform: scale(0.95);
}

.quick-action-btn i {
    font-size: 1.2rem;
    margin-bottom: 2px;
}

/* Secondary Action Button */
.btn-secondary-action {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-secondary-action:hover {
    background: var(--bg-hover);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-1px);
}

/* Clear Search Button (piccolo circolare) */
.btn-clear-search {
    position: absolute;
    right: var(--space-2);
    width: 20px;
    height: 20px;
    padding: 0;
    border: none;
    background: var(--text-secondary);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    transition: all var(--transition-fast);
}

.btn-clear-search:hover {
    background: var(--danger);
    transform: scale(1.1);
}

/* Action Buttons (Edit, Delete, Copy) - Stile portale fine */
.btn-edit,
.btn-delete,
.btn-copy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    height: 2rem;
    min-width: 2rem;
    overflow: hidden;
    text-decoration: none;
}

/* Effetto gradiente hover - stile elegante */
.btn-edit::before,
.btn-delete::before,
.btn-copy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.btn-edit::before {
    background: var(--gradient-primary);
}

.btn-delete::before {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
}

.btn-copy::before {
    background: linear-gradient(135deg, var(--info) 0%, #3b82f6 100%);
}

.btn-edit:hover,
.btn-delete:hover,
.btn-copy:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-edit:hover {
    border-color: var(--primary);
}

.btn-edit:hover::before {
    opacity: 1;
}

.btn-delete:hover {
    border-color: var(--danger);
}

.btn-delete:hover::before {
    opacity: 1;
}

.btn-copy:hover {
    border-color: var(--info);
}

.btn-copy:hover::before {
    opacity: 1;
}

.btn-edit:active,
.btn-delete:active,
.btn-copy:active {
    transform: translateY(0);
}

.btn-edit i,
.btn-delete i,
.btn-copy i {
    font-size: 0.9em;
    opacity: 0.8;
    transition: transform var(--transition-base);
}

.btn-edit:hover i,
.btn-delete:hover i,
.btn-copy:hover i {
    transform: scale(1.1);
    opacity: 1;
}

/* Action Button - Solo icona */
.btn-edit.icon-only,
.btn-delete.icon-only,
.btn-copy.icon-only {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    padding: 0;
    border-radius: 50%;
}

/* Section Toggle Button - Stile portale fine */
.btn-section-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    height: 2rem;
    min-width: 2rem;
    overflow: hidden;
}

.btn-section-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.btn-section-toggle:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.btn-section-toggle:hover::before {
    opacity: 1;
}

.btn-section-toggle:active {
    transform: translateY(0);
}

.btn-section-toggle i {
    font-size: 0.9em;
    opacity: 0.8;
    transition: transform var(--transition-fast);
}

.btn-section-toggle:hover i {
    transform: scale(1.1);
    opacity: 1;
}

.btn-section-toggle.active i,
.btn-section-toggle[aria-expanded="true"] i {
    transform: rotate(90deg);
}

.btn-section-toggle.active,
.btn-section-toggle[aria-expanded="true"] {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-section-toggle.active::before,
.btn-section-toggle[aria-expanded="true"]::before {
    opacity: 1;
}

/* BACKWARDS COMPATIBILITY (DEPRECATO) */
/* TODO: Rimuovere dopo migrazione completa */
.btn-service,
.btn-agent {
    /* Redirect to .btn-platform styles */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border-radius: 12px;
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}