:root {
    /* Color Palette matched to Index */
    --primary-color: #2F5233;
    --secondary-color: #94C973;
    --accent-color: #B1D8B7;
    --background-color: #F8F9FA;
    --surface-light: #FFFFFF;
    --text-main: #333333;
    --text-muted: #666666;
    --white: #ffffff;

    /* Typography */
    --font-heading: "Krona One", sans-serif;
    --font-body: "AR One Sans", sans-serif;

    /* Effects */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 15px 30px rgba(0, 0, 0, 0.12);
    --transition-fast: 0.2s ease;
    --radius-md: 12px;
    --radius-lg: 20px;
}

body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, var(--background-color) 0%, var(--accent-color) 100%);
    font-family: var(--font-body);
    color: var(--text-main);
}

p {
    font-family: var(--font-body);
    margin: 0;
}

#caja_principal {
    width: 100%;
    max-width: 450px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

#caja_secundaria {
    background-color: var(--surface-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    padding: 40px;
    width: 100%;
    box-sizing: border-box;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

#Titulo {
    font-family: var(--font-heading);
    font-size: 16px;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 30px;
}

#Titulo h2 {
    margin: 0;
}

#box_input_datos form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

#box_input_datos input {
    width: 100%;
    height: 45px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    padding: 0 15px;
    font-family: var(--font-body);
    font-size: 15px;
    box-sizing: border-box;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#box_input_datos input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(148, 201, 115, 0.2);
}

#Container_Button {
    width: 100%;
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

#Container_Button button {
    background-color: var(--primary-color);
    color: var(--white);
    height: 50px;
    width: 100%;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

#Container_Button button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

#no_key {
    margin-top: 20px;
    text-align: center;
}

#no_key p {
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
}

#no_key p:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

#caja_terciaria {
    background-color: var(--surface-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 25px;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 15px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

#ini_alternativa {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

#ini_alternativa p {
    font-size: 13px;
    color: var(--text-muted);
}

#ini_alternativa img {
    background-color: var(--background-color);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

#ini_alternativa img:hover {
    background-color: rgba(0, 0, 0, 0.05);
    transform: scale(1.1);
}

#no_account {
    font-size: 14px;
    text-align: center;
    color: var(--text-main);
}

#no_account a {
    color: var(--primary-color);
    font-weight: bold;
    text-decoration: none;
    transition: color var(--transition-fast);
}

#no_account a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    #caja_principal {
        padding: 0 20px;
    }
}