:root {
    --light-blue-100: #F3F5FC;
    --dark-blue-300: #0A3871;
    --dark-gray-500: #343A40;
    --dark-gray-400: #495057;
    --button-border-dark: #343a40; 
    --button-border-light: #ffffff;  
}

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

body {
    background-color: var(--light-blue-100);
    font-style: italic;
    transition: background-color 1s ease, color 1s ease;
}

.display-grid {
    max-width: 1440px;
    height: 100vh;
    display: grid;
    grid-template-columns: 120px 2fr max-content;
    gap: 20px;
    padding: 10px;
}

.grid-item-1 {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.grid-item-2 {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 80px 0 20px;
}

textarea {
    width: 100%;
    height: 100%;
    background-color: var(--light-blue-100);
    color: var(--dark-blue-300);
    padding: 0 10px;
    font-size: 18px;
    border: none;
    resize: none;
    outline: none;
    transition: background-color 1s ease, color 1s ease;
}

textarea::-webkit-scrollbar {
    width: 8px;
}

textarea::-webkit-scrollbar-track {
    background: #f1f1f1;
}

textarea::-webkit-scrollbar-thumb {
    background: #D8DFE8;
    border-radius: 4px;
}

textarea::-webkit-scrollbar-thumb:hover {
    background: var(--dark-blue-300);
}

.box-exclamation {
    padding: 0 10px;
    display: flex;
    align-items: center;
    gap: 2px;
    color: var(--dark-gray-400);
    transition: color 1s ease;
}

.box-controls {
    display: flex;
    justify-content: center;
    padding: 10px;
    gap: 30px;
}

.box-controls button, .grid-item-3 button {
    padding: 15px;
    border: none;
    border-radius: 14px;
    width: 100%;
    box-shadow: rgba(0, 0, 0, 0.24) 0 3px 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 1s ease, color 1s ease, border-color 1s ease;
}

.box-controls button:first-child {
    background-color: var(--dark-blue-300);
    color: white;
}

.box-controls button:last-child, .grid-item-3 button {
    background-color: transparent;
    color: var(--dark-blue-300);
    border: 1px solid var(--dark-blue-300);
}

.grid-item-3 {
    min-width: 350px;
    max-width: 350px;
    padding: 10px 25px;
}

.grid-item-3 button {
    display: none;
    margin-top: 15px;
}

.grid-item-3 textarea {
    display: none;
    color: var(--dark-gray-500);
    background-color: white;
}

.box-result-encriptador {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
    height: 100%;
    padding: 20px;
    border-radius: 30px;
    background-color: white;
    box-shadow: 0 24px 32px -8px rgba(0, 0, 0, 0.08);
    transition: background-color 1s ease, color 1s ease, box-shadow 1s ease;
}

.box-result-encriptador img {
    width: 80%;
    max-width: 100%;
    height: auto;
}

.box-result-encriptador h2 {
    color: var(--dark-gray-500);
    margin: 20px 0 10px;
    transition: color 1s ease;
}

.box-result-encriptador span {
    color: var(--dark-gray-400);
    font-size: 14px;
    transition: color 1s ease;
}

footer {
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    padding: 10px;
    background-color: var(--dark-blue-300);
    font-size: 14px;
    border-top: 2px solid var(--dark-gray-400);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.byDeveloper {
    display: flex;
    align-items: center;
    gap: 5px; 
}

.byDeveloper a {
    text-decoration: none;
    color: rgb(245, 139, 39);
    font-weight: bold;
}

.byDeveloper a:hover {
    text-decoration: underline;
}


/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .display-grid {
        display: flex;
        flex-direction: column;
        gap: 5px;
    }

    .grid-item-1 {
        justify-content: flex-start;
        padding: 0 10px;
    }

    .grid-item-2 {
        height: 100%;
        padding: 20px 0;
    }

    .grid-item-3 {
        min-width: 100%;
        height: auto;
    }

    .box-result-encriptador img {
        display: none;
    }

    .box-result-encriptador h2 {
        margin: 0 0 10px;
    }
}

@media (max-width: 375px) {
    .box-controls {
        flex-direction: column;
        gap: 10px;
    }

    .box-controls button {
        font-size: 18px;
    }

    .box-result-encriptador {
        font-style: normal !important;
    }
}