/* Hiệu ứng loading mượt mà */
.fade-in {
    animation: fadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cursor-zoom-in { cursor: zoom-in; }
.cursor-zoom-out { cursor: zoom-out; }

/* Spinner quay cho Loading (Chính) */
.loader {
    width: 64px;
    height: 64px;
    border: 6px solid #f1f5f9;
    border-bottom-color: #4f46e5;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

/* Spinner nhỏ cho Button */
.loader-sm {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-bottom-color: #ffffff;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

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

/* Custom Scrollbar cho sang trọng */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Loại bỏ viền xanh khi in */
@media print {
    body {
        background-color: white !important;
    }
    .print-hidden {
        display: none !important;
    }
}

/* Font chữ chuyên nghiệp */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}