/* ---------- Reset ساده ---------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ---------- بدنه ---------- */
body {
    font-family: Tahoma, sans-serif;
    background: #f0f4f8;
    direction: rtl;
    color: #333;
}

/* ---------- کانتینر ---------- */
.container {
    max-width: 600px;
    margin: 50px auto;
    background: #fff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.08);
}

/* ---------- تیتر ---------- */
h1 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 28px;
    color: #4f46e5;
}

/* ---------- فرم ---------- */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="file"],
input[type="text"] {
    padding: 10px 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 14px;
}

input[type="file"] {
    cursor: pointer;
}

/* ---------- دکمه ---------- */
button.download-btn {
    background: #4f46e5;
    color: #fff;
    border: none;
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

button.download-btn:hover {
    background: #4338ca;
}

/* ---------- پیام ---------- */
.empty {
    text-align: center;
    margin-bottom: 15px;
    color: #e63946;
    font-weight: bold;
}

/* ---------- لینک خروج ---------- */
a {
    text-decoration: none;
    color: #4f46e5;
    display: inline-block;
    margin-top: 15px;
    font-weight: bold;
    transition: 0.3s;
}

a:hover {
    color: #4338ca;
}

/* ---------- ریسپانسیو ---------- */
@media (max-width: 600px) {
    .container {
        padding: 20px;
        margin: 30px 10px;
    }
}