/* Base Styles & Neumorphism Variables */
:root {
    --bg-color: #e0e5ec;
    --text-color: #4d5b68;
    --text-color-light: #8b9fb1;
    --shadow-light: #ffffff;
    --shadow-dark: #a3b1c6;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Neumorphism Utilities */
.neu-box {
    background: var(--bg-color);
    border-radius: 20px;
    box-shadow: 9px 9px 16px rgba(163, 177, 198, 0.6), 
                -9px -9px 16px rgba(255, 255, 255, 0.5);
}

.neu-box-inset {
    background: var(--bg-color);
    border-radius: 20px;
    box-shadow: inset 6px 6px 10px rgba(163, 177, 198, 0.6), 
                inset -6px -6px 10px rgba(255, 255, 255, 0.5);
}

.neu-button {
    background: var(--bg-color);
    color: var(--text-color);
    border: none;
    outline: none;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    box-shadow: 6px 6px 10px rgba(163, 177, 198, 0.6), 
                -6px -6px 10px rgba(255, 255, 255, 0.5);
}

.neu-button:hover {
    color: #3182ce;
}

.neu-button:active {
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.6), 
                inset -4px -4px 8px rgba(255, 255, 255, 0.5);
}

.neu-input {
    background: var(--bg-color);
    border: none;
    outline: none;
    border-radius: 12px;
    padding: 15px;
    width: 100%;
    color: var(--text-color);
    font-size: 16px;
    box-shadow: inset 4px 4px 8px rgba(163, 177, 198, 0.6), 
                inset -4px -4px 8px rgba(255, 255, 255, 0.5);
    transition: all 0.2s ease;
}

.neu-input:focus {
    box-shadow: inset 6px 6px 12px rgba(163, 177, 198, 0.7), 
                inset -6px -6px 12px rgba(255, 255, 255, 0.6);
}

.neu-input::placeholder {
    color: var(--text-color-light);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(224, 229, 236, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Modal Content */
.modal-content {
    position: relative;
    width: 90%;
    max-width: 400px;
    padding: 40px;
    transform: translateY(-20px) scale(0.95);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    letter-spacing: 1px;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 35px;
    height: 35px;
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

.open-btn {
    padding: 15px 40px;
    font-size: 18px;
}

/* Form Styles */
.input-group {
    margin-bottom: 25px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.neu-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 5px;
    background: var(--bg-color);
    box-shadow: 3px 3px 6px rgba(163, 177, 198, 0.6), 
                -3px -3px 6px rgba(255, 255, 255, 0.5);
    cursor: pointer;
    position: relative;
    outline: none;
}

.neu-checkbox:checked {
    box-shadow: inset 2px 2px 5px rgba(163, 177, 198, 0.6), 
                inset -2px -2px 5px rgba(255, 255, 255, 0.5);
}

.neu-checkbox:checked::after {
    content: '✔';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: #3182ce;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    font-size: 16px;
    margin-top: 10px;
}

/* Responsiveness */
@media (max-width: 480px) {
    .modal-content {
        padding: 30px 20px;
    }
}