/* General Styles */
body {
    font-family: 'Sarabun', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 { color: #1d2129; }
h2 { color: #606770; font-weight: 400; }

main {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.1);
    max-width: 700px;
    width: 100%;
    box-sizing: border-box;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    border-bottom: 1px solid #dddfe2;
    margin-bottom: 1.5rem;
}

.tab-link {
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    background-color: transparent;
    font-size: 1rem;
    color: #606770;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease-in-out;
}

.tab-link:hover {
    background-color: #f0f2f5;
    border-radius: 5px 5px 0 0;
}

.tab-link.active {
    border-color: #1877f2;
    color: #1877f2;
    font-weight: bold;
}

/* Tab Content */
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.5s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Demo Forms and Boxes */
.demo-form, .demo-box {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: #f7f8fa;
    border: 1px solid #dddfe2;
    border-radius: 5px;
}
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; }
.form-group input {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #dddfe2;
    box-sizing: border-box;
}
.demo-form button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: #1877f2;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
}
.demo-form button:hover { background-color: #166fe5; }

/* Code and Result Boxes */
.code-inline { background-color: #e9ecef; padding: 2px 6px; border-radius: 4px; font-family: monospace; }
.result-box { margin-top: 1rem; padding: 1rem; background-color: #e9ecef; border-radius: 4px; font-size: 0.9rem; }
.code-block { display: block; background: #333; color: white; padding: 10px; border-radius: 5px; font-family: monospace; white-space: pre-wrap;}
.vulnerable { color: #fa3e3e; font-weight: bold; }

/* Success/Fail Pages */
main.center-page {
    padding: 0;
    background-color: transparent;
    box-shadow: none;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80vh;
}
.status-card {
    background-color: white;
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.1);
}
.status-card.success h1 { color: #42b72a; }
.status-card.fail h1 { color: #fa3e3e; }
.back-link {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 10px 20px;
    background-color: #606770;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}
.back-link:hover { background-color: #444; }