/* Global Font */
* {
    font-family: 'Sarabun', sans-serif;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #e2e8f0;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}

/* Smooth transitions */
.nav-part,
.nav-chapter,
.nav-standard {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Part dropdown animation */
.part-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.part-content.open {
    max-height: 2000px;
}

/* Global Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-up {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-scale-in {
    animation: scaleIn 0.15s ease-out forwards;
}

/* Staggered Delay for child elements */
.stagger-1 {
    animation-delay: 0.1s;
}

.stagger-2 {
    animation-delay: 0.2s;
}

.stagger-3 {
    animation-delay: 0.3s;
}

/* Hover Effects */
.hover-lift {
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Remove Number Input Spinners (Chrome, Safari, Edge, Opera) */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    appearance: none;
    margin: 0;
}

/* Firefox */
input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Login Page Styles */
.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.glass-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.input-focus:focus {
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.3);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.4);
    }

    50% {
        box-shadow: 0 0 40px rgba(102, 126, 234, 0.6);
    }
}

.btn-glow:hover {
    animation: pulse-glow 2s ease-in-out infinite;
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-5px);
    }

    40%,
    80% {
        transform: translateX(5px);
    }
}

/* Animations */
.animate-slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Custom scrollbar for modals */
.modal-scroll::-webkit-scrollbar {
    width: 8px;
}

.modal-scroll::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.modal-scroll::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 4px;
}

.modal-scroll::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}