/* ================= RESET ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

body {
    background: #f2f6fa;
    color: #333;
    line-height: 1.6;
}

/* ================= HEADER ================= */
header {
    background: #0b4da2;
    color: #fff;
    padding: 25px 15px;
}

.header-container {
    max-width: 1100px;
    margin: auto;
    text-align: center;
}

header h1 {
    font-size: 26px;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

header p {
    font-size: 15px;
    opacity: 0.95;
}

/* ================= MAIN ================= */
main {
    max-width: 1100px;
    margin: auto;
    padding: 20px 15px 40px;
}

/* ================= INTRO ================= */
.intro {
    background: #ffffff;
    padding: 20px;
    margin-bottom: 25px;
    border-left: 5px solid #0b4da2;
}

.intro h2 {
    color: #0b4da2;
    margin-bottom: 10px;
}

.intro ul {
    margin: 10px 0 10px 20px;
}

.intro li {
    margin-bottom: 6px;
}

.note {
    margin-top: 10px;
    font-size: 14px;
    color: #555;
}

/* ================= ANALYZE BOX ================= */
.analyze-box {
    background: #ffffff;
    padding: 20px;
    margin-bottom: 25px;
    border-left: 5px solid #0b4da2;
}

.analyze-box h2 {
    color: #0b4da2;
    margin-bottom: 15px;
}

form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input[type="text"] {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #ccc;
    font-size: 15px;
}

button {
    padding: 10px 25px;
    background: #0b4da2;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

button:hover {
    background: #083d82;
}

/* ================= RESULT ================= */
.result {
    background: #ffffff;
    padding: 20px;
    border-left: 5px solid #0b4da2;
}

.result h2 {
    color: #0b4da2;
    margin-bottom: 15px;
}

.result-block {
    margin-bottom: 20px;
}

.result-block h3 {
    color: #0b4da2;
    margin-bottom: 6px;
    font-size: 16px;
}

pre {
    background: #eef2f7;
    padding: 12px;
    overflow-x: auto;
    font-size: 14px;
}

.ip {
    font-weight: bold;
    font-size: 15px;
    color: #333;
}

/* ================= FOOTER ================= */
footer {
    background: #e0e0e0;
    padding: 15px;
    text-align: center;
    font-size: 13px;
    color: #333;
}