/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* Header */
header {
    background: #0b3d91;
    color: white;
    padding: 20px 0;
}

header .logo {
    font-size: 1.8rem;
    display: inline-block;
}

header nav {
    display: inline-block;
    float: right;
}

header nav ul {
    list-style: none;
}

header nav ul li {
    display: inline-block;
    margin-left: 20px;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

/* Hero */
.hero {
    background: linear-gradient(rgba(11,61,145,0.8), rgba(11,61,145,0.6)), url('images/gst-banner.jpg') no-repeat center center/cover;
    color: white;
    text-align: center;
    padding: 120px 20px;
    animation: fadeIn 2s ease-in;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

@keyframes fadeIn {
    from {opacity: 0; transform: translateY(20px);}
    to {opacity: 1; transform: translateY(0);}
}

/* Calculator */
.calculator {
    padding: 60px 0;
    background: #f4f4f4;
    text-align: center;
}

.calculator .calc-box {
    background: white;
    padding: 30px;
    border-radius: 10px;
    display: inline-block;
    max-width: 450px;
    width: 100%;
    box-shadow: 0px 4px 12px rgba(0,0,0,0.1);
}

.calculator input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.calculator button {
    padding: 10px 20px;
    background: #0b3d91;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
}

.calculator button:hover {
    background: #06326f;
}

.rate-buttons {
    margin: 10px 0;
}

.rate-btn {
    padding: 8px 15px;
    margin: 5px;
    background: #ff6600;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

.rate-btn:hover {
    background: #e55a00;
}

.calc-actions {
    margin-top: 10px;
}

.result {
    margin-top: 20px;
}

.result p {
    font-weight: bold;
    margin: 5px 0;
}

#copyResult {
    margin-top: 10px;
    background: #28a745;
}

/* Tooltip */
.tooltip {
    cursor: pointer;
    font-size: 0.9rem;
}

/* FAQ */
.faq {
    padding: 60px 0;
}

.faq-item {
    background: #fff;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 10px;
    box-shadow: 0px 3px 8px rgba(0,0,0,0.08);
}

/* Footer */
footer {
    background: #0b3d91;
    color: white;
    text-align: center;
    padding: 20px 0;
}

/* Responsive */
@media(max-width: 768px) {
    header nav {
        float: none;
        text-align: center;
        margin-top: 10px;
    }
}