/* Phase 2: Enhanced UX Styles */

/* ==========================================
   LOADING SPINNERS
   ========================================== */

/* Inline spinner (small, for buttons) */
.spinner-inline {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

/* Overlay spinner (covers entire screen) */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(2px);
}

.spinner-overlay .spinner-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
    min-width: 200px;
}

.spinner-overlay .spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #FF6B35;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.spinner-overlay .spinner-text {
    color: #374151;
    font-size: 1rem;
    font-weight: 500;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Card-level spinner */
.spinner-card {
    padding: 3rem;
    text-align: center;
}

.spinner-card .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #FF6B35;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.spinner-card .spinner-text {
    color: #6b7280;
    font-size: 0.9rem;
}

/* Button loading state */
.btn.loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ==========================================
   CONFIRMATION MODALS
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
    animation: fadeIn 0.2s ease-out;
}

.modal-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.modal-icon.warning {
    color: #f59e0b;
}

.modal-icon.danger {
    color: #ef4444;
}

.modal-icon.success {
    color: #10b981;
}

.modal-icon.info {
    color: #3b82f6;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
    margin: 0;
    flex: 1;
}

.modal-body {
    padding: 1.5rem;
    color: #374151;
    line-height: 1.6;
}

.modal-body p {
    margin: 0 0 1rem;
}

.modal-body p:last-child {
    margin-bottom: 0;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.modal-footer .btn {
    min-width: 100px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   EMPTY STATES
   ========================================== */

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #111827;
    margin: 0 0 0.5rem;
}

.empty-state-message {
    font-size: 1rem;
    color: #6b7280;
    margin: 0 0 1.5rem;
    line-height: 1.5;
}

.empty-state-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Empty state variants */
.empty-state.compact {
    padding: 2rem 1rem;
}

.empty-state.compact .empty-state-icon {
    font-size: 3rem;
}

.empty-state.compact .empty-state-title {
    font-size: 1.25rem;
}

.empty-state.compact .empty-state-message {
    font-size: 0.9rem;
}

/* ==========================================
   TOAST IMPROVEMENTS
   ========================================== */

.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 400px;
}

.toast {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid;
}

.toast.success {
    border-left-color: #10b981;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast.warning {
    border-left-color: #f59e0b;
}

.toast.info {
    border-left-color: #3b82f6;
}

.toast-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-message {
    font-size: 0.95rem;
    color: #111827;
    font-weight: 500;
    margin: 0;
}

.toast-close {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    flex-shrink: 0;
}

.toast-close:hover {
    background: #f3f4f6;
    color: #6b7280;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==========================================
   MOBILE RESPONSIVE
   ========================================== */

@media (max-width: 640px) {
    .modal-container {
        max-width: calc(100% - 2rem);
    }
    
    .modal-footer {
        flex-direction: column-reverse;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
    
    .toast-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
    
    .empty-state {
        padding: 2rem 1rem;
    }
    
    .empty-state-icon {
        font-size: 3rem;
    }
    
    .spinner-overlay .spinner-container {
        min-width: auto;
        width: calc(100% - 2rem);
        max-width: 300px;
    }
}

/* ==========================================
   ACCESSIBILITY
   ========================================== */

.modal-overlay:focus {
    outline: none;
}

.modal-container:focus {
    outline: 2px solid #FF6B35;
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .spinner-inline,
    .spinner,
    .modal-overlay,
    .modal-container,
    .toast {
        animation: none;
    }
}