/* GIAO DIỆN SOFT BRUTALISM - ROI CALCULATOR */
.tool-container {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    max-width: 1000px; margin: 20px auto;
    border: 3px solid #111111; border-radius: 12px;
    box-shadow: 6px 6px 0px #111111; padding: 30px;
    background: #ffffff; color: #111111; box-sizing: border-box;
}

h2.tool-title {
    font-family: 'Montserrat', sans-serif; font-size: 2rem;
    text-align: center; text-transform: uppercase; margin-top: 0;
    margin-bottom: 30px; font-weight: 900;
}

.main-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }

.input-group { margin-bottom: 20px; }
.time-group { display: grid; grid-template-columns: 2fr 1fr; gap: 15px; }

.input-group label { display: block; font-weight: 800; margin-bottom: 8px; font-size: 1.05rem; }

.input-group input, .input-group select {
    width: 100%; padding: 12px 15px; font-size: 1.1rem; font-weight: 700;
    font-family: 'Inter', sans-serif; border: 3px solid #111111;
    border-radius: 8px; outline: none; box-sizing: border-box;
    background-color: #f9f9f9; box-shadow: 3px 3px 0px #111111;
    transition: box-shadow 0.2s, background-color 0.2s, transform 0.1s;
}

.input-group input:focus, .input-group select:focus {
    background-color: #ffffff; transform: translate(2px, 2px); box-shadow: 1px 1px 0px #111111;
}

/* Style cho dòng chữ đọc tiền */
.money-words {
    font-size: 0.95rem;
    font-weight: 600;
    color: #4D9BEA; /* Xanh dương nhẹ */
    margin-top: 6px;
    font-style: italic;
    min-height: 20px; /* Giữ khung đỡ bị giật khi chưa gõ */
}

.help-text { display: block; margin-top: 5px; font-size: 0.9rem; font-weight: 600; color: #666; }

.action-buttons { display: grid; grid-template-columns: 2fr 1fr; gap: 15px; margin-top: 25px; }

.action-buttons button {
    cursor: pointer; font-family: 'Montserrat', sans-serif; font-size: 1.1rem;
    font-weight: 900; padding: 15px; border: 3px solid #111111; border-radius: 8px;
    box-shadow: 4px 4px 0px #111111; transition: transform 0.1s, box-shadow 0.1s;
    text-transform: uppercase; color: #111111;
}
.action-buttons button:active { transform: translate(4px, 4px); box-shadow: 0px 0px 0px #111111; }

.btn-calculate { background-color: #fdfd96; } 
.btn-clear { background-color: #eceae4; } 

.result-section { display: flex; flex-direction: column; gap: 20px; }

.result-card {
    border: 3px solid #111111; border-radius: 12px; padding: 25px 20px;
    text-align: center; box-shadow: 4px 4px 0px #111111; background-color: #fff;
    transition: background-color 0.3s;
}

.primary-result { background-color: #f4f4f4; }
.result-card h4 { margin: 0 0 10px 0; font-family: 'Montserrat', sans-serif; font-size: 1.1rem; color: #555; }
.result-card .amount { font-family: 'Montserrat', sans-serif; font-size: 3rem; font-weight: 900; word-break: break-word; line-height: 1.1; }
.result-card .amount.small { font-size: 1.8rem; }

.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.text-profit { color: #5FB376 !important; } 
.text-loss { color: #e05a47 !important; } 
.bg-profit { background-color: #e2f0cb !important; }
.bg-loss { background-color: #ffb7b2 !important; }

.roi-message {
    padding: 15px; background-color: #f9f9f9; border: 2px dashed #111111;
    border-radius: 8px; font-weight: 700; font-size: 1rem; line-height: 1.5; text-align: center;
}

.tooltip-container { position: relative; cursor: help; }
.tooltip-text {
    visibility: hidden; width: 200px; background-color: #111111; color: #fff;
    text-align: center; border-radius: 6px; padding: 8px; position: absolute;
    z-index: 1; bottom: 105%; left: 50%; transform: translateX(-50%);
    font-size: 0.85rem; font-weight: normal; opacity: 0; transition: opacity 0.3s;
    font-family: 'Inter', sans-serif;
}
.tooltip-container:hover .tooltip-text { visibility: visible; opacity: 1; }
.tooltip-text::after {
    content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px;
    border-width: 5px; border-style: solid; border-color: #111111 transparent transparent transparent;
}

@media (max-width: 768px) {
    .main-layout { grid-template-columns: 1fr; }
    .result-grid { grid-template-columns: 1fr; }
    .action-buttons { grid-template-columns: 1fr; }
}