/* ========== اسلایدر صفحه اصلی ========== */
.slider {
    position: relative;
    direction: rtl;
    width: 100%;
    min-height: clamp(500px, 80vh, 700px);
    overflow: hidden;
    background: #0b1220;
}

.slider .slides {
    position: absolute;
    inset: 0;
}

.slider .slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity .9s ease;
}

.slider .slide.active {
    opacity: 1;
    visibility: visible;
}

/* لایه تیره روی عکس — عامل اصلی خوانایی متن */
.slider .slide::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg,
    rgba(4, 14, 28, .92) 0%,
    rgba(4, 14, 28, .72) 45%,
    rgba(4, 14, 28, .38) 100%);
}

.slider .slide .content {
    position: relative;
    z-index: 2;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
}

.slider .slide .content span {
    color: #67e8f9;
    font-weight: 600;
    font-size: clamp(.85rem, 1.5vw, 1rem);
}

.slider .slide .content h1 {
    color: #fff;
    font-size: clamp(1.55rem, 4.2vw, 3rem);
    line-height: 1.5;
    margin: 0;
    text-shadow: 0 2px 14px rgba(0, 0, 0, .55);
}

.slider .slide .content h1 strong { color: #38bdf8; }

.slider .slide .content p {
    color: #e2e8f0;
    font-size: clamp(.95rem, 1.6vw, 1.12rem);
    line-height: 1.95;
    max-width: 560px;
    margin: 0;
    text-shadow: 0 1px 8px rgba(0, 0, 0, .5);
}

.slider .slide .content a {
    align-self: flex-start;
    margin-top: 8px;
    background: linear-gradient(135deg, #0284c7, #0ea5e9);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    padding: 13px 34px;
    border-radius: 50px;
    box-shadow: 0 8px 22px rgba(2, 132, 199, .35);
    transition: .3s;
}

.slider .slide .content a:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(2, 132, 199, .45);
}

/* ===== دکمه‌های قبلی / بعدی ===== */
.slider .nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 46px;
    height: 46px;
    border: none;
    border-radius: 50%;
    background: rgba(15, 23, 42, .45);
    color: #fff;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: .3s;
}

.slider .nav:hover { background: rgba(2, 132, 199, .9); }
.slider .nav.prev { right: 16px; }
.slider .nav.next { left: 16px; }

/* ===== دات‌ها ===== */
.slider .dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 8px;
}

.slider .dots span {
    width: 9px;
    height: 9px;
    border-radius: 20px;
    background: rgba(255, 255, 255, .45);
    cursor: pointer;
    transition: .35s;
}

.slider .dots span.active {
    width: 28px;
    background: #fff;
}

/* ==================== موبایل ==================== */
@media (max-width: 768px) {

    /* ارتفاع ثابت و منطقی — دیگه خیلی بلند نمیشه */
    .slider {
        min-height: 460px;
    }

    /* گرادیان عمودی: پایین تیره، متن پایین می‌شینه */
    .slider .slide::before {
        background: linear-gradient(180deg,
        rgba(4, 14, 28, .45) 0%,
        rgba(4, 14, 28, .85) 100%);
    }

    .slider .slide .content {
        justify-content: flex-end;
        padding: 24px 20px 64px;
        gap: 10px;
    }

    .slider .slide .content a {
        padding: 11px 26px;
        font-size: .9rem;
    }

    /* در موبایل سوایپ و دات‌ها کافیه */
    .slider .nav { display: none; }
}