:root {
    --input-width: 280px;
    --active-color: rgb(29 78 216);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f9f9f9;
}

.margin-top-16 {
    margin-top: 1.6rem;
}

.ev-label {
    font-size: 1rem;
    padding-left: 0.5rem;
}

.ev-input {
    border: 1px solid #d1d5db;
    border-radius: 0.4rem;
    font-size: 1rem;
    line-height: 1.25rem;
    padding: 0.5rem 0.75rem;
    width: var(--input-width);
}

@media (max-width: 630px) {
    .ev-input {
        width: calc(100vw - 40px);
    }
}

.fa-solid {
    margin-right: 15px;
}

/* button-group */
.button-group {
    height: 40px;
    display: flex;
    gap: 0;
    width: auto;
    padding: 0;
    transition: transform 0.2s ease, background-color 0.3s ease;
}

.button-group:hover {
    transform: translateY(-2px);
}

.button-group button {
    width: auto;
    background-color: #fff;
    border: none;
    border-radius: 0.4rem;
    cursor: pointer;
    padding: 0.4rem 0.6rem;
    font-size: 1rem;
    color: var(--active-color);
    text-align: center;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.button-group button:hover {
    transform: translateY(-2px);
}

@media (max-width: 900px) {
    .compact-900 button span {
        display: none;
    }
    .compact-900 button {
        width: 36px;
    }
    button.compact-900 span {
        display: none;
    }
}

@media (max-width: 1080px) {
    .compact-1080 button span {
        display: none;
    }
    .compact-1080 button {
        width: 36px;
    }
    button.compact-1080 span {
        display: none;
    }
    button.compact-1080 {
        width: 40px !important;
    }
}

.button-group button:hover {
    background-color: #ddd;
}

.button-group button.active {
    background-color: #116;
    color: #fff;
}

/* button */
.ev-button {
    height: 40px;
    background-color: #fff;
    color: var(--active-color);
    transition: transform 0.2s ease, background-color 0.3s ease;
    cursor: pointer;
}

.ev-button:hover {
    background-color: #116;
    color: #fff;
    transform: translateY(-2px);
}

.ev-button:active {
    opacity: 0.9;
    transform: scale(0.98); 
}

/* flex styles */
.flex-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.flex-row {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    align-content: stretch;
}

.flex-wrap {
    flex-wrap: wrap;
}

/* Loading popup styles */
.loading-popup {
    display: flex;
    position: fixed;
    background-color: rgba(200, 200, 200, 0.8);
    z-index: 9900;
    justify-content: center;
    align-items: center;
    pointer-events: none;
}

.loading-content {
    background: white;
    padding: 30px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    text-align: center;
    width: 50px;
    height: 50px;
}

.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

.loading-text {
    font-size: 16px;
    color: #333;
    margin: 0;
}

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

.loading-progress-bar-background {
    position: fixed;
    top: 0;
    left: 0;
    height: 6px;
    background-color: white;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.1);
    width: 100%;
}

.loading-progress-bar {
    position: relative;
    left: 0;
    top: 0;
    height: 4px;
    background-color: var(--active-color);
    overflow: hidden;
    transition: width 0.5s ease, background-color 0.5s ease, opacity 0.5s ease;
}