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

body {
    background-color: #313131; 
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100vw;
    padding: 0; 
    overflow: hidden;
}

.sidebar-esquerda {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    width: 260px;
    align-self: stretch; 
    color: #ffffff;
    padding: 20px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 15px;
}

.nav-item {
    color: #b9ccf6;
    text-decoration: none;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

.nav-item:hover, .nav-item.active {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
}

.sidebar-bottom {
    margin-top: auto; 
    display: flex;
    gap: 15px;
    padding-top: 20px;
}

.icon-btn {
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    padding: 5px 12px;
    border-radius: 4px;
}

.extra-text {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #888;
}

.screen-container {
    width: 100%;
    height: 100vh;
    background-color: #ebf2ff; 
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: none; 
    border-radius: 0; 
    overflow: hidden;
    flex-shrink: 0;
}

.top-bar {
    background-color: #1a42b9;
    padding: 18px 25px;
    display: flex;
    align-items: center;
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.back-button {
    background: none;
    border: none;
    color: #0b1d53; 
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, color 0.2s;
    z-index: 10;}

.back-button:hover {
    transform: scale(1.08);
    color: #ffffff;
}

.back-button svg {
    width: 100%;
    height: 100%;
}

.title {
    color: white;
    font-size: 1.8rem;
    font-weight: bold;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.main-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px; 
    flex-grow: 1;
    padding: 20px;
}

.subtitle-box {
    background-color: #b9ccf6; 
    color: white;
    font-size: 1.6rem;
    font-weight: bold;
    padding: 16px 30px;
    border-radius: 16px; 
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    text-align: center;
    width: 85%;
    max-width: 520px;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    align-items: center;
}

.option-button {
    background-color: #3b6bd6; 
    color: white;
    border: 2px solid #5282eb;
    font-size: 1.5rem;
    font-weight: bold;
    padding: 12px 30px;
    width: 80%;
    max-width: 360px;
    border-radius: 40px; 
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: flex-start; 
    gap: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: background-color 0.2s, transform 0.1s;
}

.option-button:hover {
    background-color: #2b5bc7;
    transform: translateY(-2px);
}

.option-button span {
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.icon-container {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.icon-container svg {
    width: 100%;
    height: 100%;
}

.fill-icon { color: #ffffff; }
.stroke-icon { color: #ffffff; }

.bottom-bar {
    background-color: #3b6bd6;
    padding: 12px 30px;
    display: flex;
    justify-content: flex-end;
    box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
}

.settings-button {
    background: none;
    border: none;
    color: #a3beff; 
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: bold;
    transition: color 0.2s;
}

.settings-icon {
    width: 35px; 
    height: 35px;
}

.settings-icon svg {
    width: 100%;
    height: 100%;
}

.settings-button:hover {
    color: white;
}

@media (max-width: 768px) {
    .top-bar {
        padding: 12px 15px;
    }
    
    .back-button {
        width: 38px;
        height: 38px;
    }
    
    .title {
        font-size: 1.4rem;
    }
    
    .main-content {
        gap: 30px;
    }

    .subtitle-box {
        font-size: 1.1rem;
        padding: 12px 20px;
        width: 90%;
    }

    .option-button {
        font-size: 1.2rem;
        padding: 10px 20px;
        gap: 15px;
        width: 90%;
    }
    
    .icon-container {
        width: 28px;
        height: 28px;
    }
    
    .bottom-bar {
        padding: 8px 20px;
    }
    
    .settings-icon {
        width: 28px;
        height: 28px;
    }
}