/* ===== استایل عمومی و فونت ===== */
* {
    font-family: 'Vazirmatn', sans-serif;
    box-sizing: border-box;
}

body {
    background: linear-gradient(to bottom, #ffe6f0, #ffffff);
    padding: 60px 20px;
    margin: 0;
}

/* ===== تایپوگرافی ===== */
h2 {
    color: #d63384;
    font-size: 26px;
    margin-bottom: 10px;
    text-align: center;
}

/* ===== کانتینر اصلی ===== */
.container {
    max-width: 500px;
    margin: 0 auto;
    background: #fff;
    padding: 30px 25px;
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.07);
}

/* ===== فرم ===== */
input[type="text"],
input[type="tel"],
.form-control {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 12px;
    font-size: 14px;
    transition: border-color 0.3s;
    text-align: right;
}

input[type="text"]:focus,
input[type="tel"]:focus,
.form-control:focus {
    border-color: #ff5b93;
    outline: none;
}

/* ===== دکمه‌ها ===== */
.btn {
    display: block;
    width: 100%;
    background-color: #ff5b93;
    color: white;
    padding: 12px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    text-align: center;
}

.btn:hover {
    background-color: #e44f81;
}

/* ===== پیام‌ها ===== */
.messages {
    margin-bottom: 20px;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 12px;
    border: 1px solid #eee;
}

.msg {
    text-align: right;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 10px;
    line-height: 1.4;
    /*white-space: pre-wrap;*/
    font-size: 14px;
}

.msg.user {
    background: #e0f7ff;
    border-right: 4px solid #00bcd4;
}

.msg.assistant {
    background: #fff0f6;
    border-right: 4px solid #ff5b93;
    padding: 14px;
    border-radius: 12px;
    font-size: 14px;
}

.msg.assistant h3 {
    margin: 10px 0 6px;
    font-size: 18px;
    color: #d63384;
}

.msg.assistant p,
.msg.assistant li {
    line-height: 1.4;
    margin: 2px 0;
}

/* ===== لودر و اسپینر ===== */
.spinner-border {
    width: 1rem;
    height: 1rem;
    vertical-align: middle;
}

.loading {
    background: #f0f0f0;
    padding: 10px;
    text-align: center;
    border-radius: 5px;
    margin: 1rem 0;
    font-weight: bold;
    color: #555;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #ff5b93;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== ابزارهای ساختاری ===== */
.text-center {
    text-align: center;
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    flex-direction: column;
}

.col-md-12 {
    flex: 0 0 100%;
    max-width: 100%;
}

/* ===== Media Queries ===== */

/* ≥ 768px */
@media (max-width: 768px) {
    body {
        padding: 40px 15px;
    }

    h2 {
        font-size: 24px;
    }

    .container {
        padding: 24px 20px;
        border-radius: 16px;
    }

    .msg {
        font-size: 13.5px;
    }

    .msg.assistant h3 {
        font-size: 17px;
    }

    .btn {
        font-size: 15px;
    }
}

/* ≥ 576px */
@media (max-width: 576px) {
    body {
        padding: 30px 10px;
    }

    h2 {
        font-size: 22px;
    }

    .container {
        padding: 20px 16px;
        border-radius: 14px;
    }

    .msg {
        font-size: 13px;
        line-height: 1.35;
    }

    .loader {
        width: 24px;
        height: 24px;
        border-width: 3px;
    }
}

/* ≥ 375px */
@media (max-width: 375px) {
    .btn {
        padding: 10px;
        font-size: 14px;
        border-radius: 10px;
    }

    .msg {
        font-size: 12.5px;
    }
}