/* ===========================================================
   gd-auto-scroll.css - استایل دکمه اسکرول خودکار
   =========================================================== */

/* ============================================
   کانتینر اصلی - وسط پایین صفحه
   ============================================ */

.gcd-auto-scroll-container {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99998;
    display: none;
    direction: ltr;
}

/* نمایش بعد از لود کامل */
.gcd-auto-scroll-container.gcd-visible {
    display: block;
    animation: gcdScrollFadeIn 0.4s ease;
}

@keyframes gcdScrollFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

/* ============================================
   دکمه اصلی - دایره‌ای
   ============================================ */

.gcd-auto-scroll-btn-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.gcd-auto-scroll-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: #1e293b;
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    padding: 0;
    position: relative;
}

.gcd-auto-scroll-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(0,0,0,0.35);
}

.gcd-auto-scroll-btn:active {
    transform: scale(0.95);
}

.gcd-auto-scroll-btn svg {
    width: 24px;
    height: 24px;
    stroke: #ffffff;
    fill: none;
    transition: transform 0.3s ease;
}

.gcd-auto-scroll-btn.active svg {
    animation: gcdScrollPulse 1.5s ease-in-out infinite;
}

@keyframes gcdScrollPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* ============================================
   نوار کنترل سرعت
   ============================================ */

.gcd-speed-control {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 8px 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    display: none;
    align-items: center;
    gap: 12px;
    min-width: 160px;
    border: 1px solid rgba(226, 232, 240, 0.6);
    direction: ltr;
}

.gcd-speed-control.gcd-visible {
    display: flex;
    animation: gcdSpeedFadeIn 0.3s ease;
}

@keyframes gcdSpeedFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.gcd-speed-label {
    font-size: 11px;
    font-weight: 600;
    color: #475569;
    font-family: inherit;
    flex-shrink: 0;
}

/* ★★★ اسلایدر با رنگ‌آمیزی ★★★ */
.gcd-speed-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100px;
    height: 5px;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    flex-shrink: 0;
    background: linear-gradient(to right, #3b82f6 0%, #3b82f6 var(--fill, 6%), #e2e8f0 var(--fill, 6%), #e2e8f0 100%);
    transition: background 0.15s ease;
}

/* Webkit (Chrome, Safari, Edge) */
.gcd-speed-slider::-webkit-slider-runnable-track {
    width: 100%;
    height: 5px;
    border-radius: 4px;
    background: transparent;
}

.gcd-speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #1e293b;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    transition: all 0.2s ease;
    margin-top: -6.5px;
    border: 2px solid #ffffff;
}

.gcd-speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

/* Firefox */
.gcd-speed-slider::-moz-range-track {
    width: 100%;
    height: 5px;
    border-radius: 4px;
    background: #e2e8f0;
    border: none;
}

.gcd-speed-slider::-moz-range-progress {
    height: 5px;
    border-radius: 4px 0 0 4px;
    background: #3b82f6;
}

.gcd-speed-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #1e293b;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    transition: all 0.2s ease;
}

.gcd-speed-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

.gcd-speed-value {
    font-size: 13px;
    font-weight: 700;
    color: #1e293b;
    min-width: 24px;
    text-align: center;
    font-family: inherit;
    flex-shrink: 0;
}

/* ============================================
   واکنش‌گرا
   ============================================ */

@media (max-width: 768px) {
    .gcd-auto-scroll-container {
        bottom: 85px;
    }
    
    .gcd-auto-scroll-btn {
        width: 48px;
        height: 48px;
    }
    
    .gcd-auto-scroll-btn svg {
        width: 22px;
        height: 22px;
    }
    
    .gcd-speed-control {
        padding: 8px 14px;
        min-width: 180px;
        gap: 10px;
    }
    
    .gcd-speed-slider {
        width: 110px;
    }
    
    .gcd-speed-label {
        font-size: 10px;
    }
    
    .gcd-speed-value {
        font-size: 12px;
        min-width: 20px;
    }
}

@media (max-width: 480px) {
    .gcd-auto-scroll-container {
        bottom: 75px;
    }
    
    .gcd-auto-scroll-btn {
        width: 44px;
        height: 44px;
    }
    
    .gcd-auto-scroll-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .gcd-speed-control {
        padding: 6px 12px;
        min-width: 160px;
        gap: 8px;
    }
    
    .gcd-speed-slider {
        width: 90px;
    }
    
    .gcd-speed-label {
        font-size: 9px;
    }
    
    .gcd-speed-value {
        font-size: 11px;
        min-width: 18px;
    }
}

/* ============================================
   دارک مود
   ============================================ */

@media (prefers-color-scheme: dark) {
    .gcd-auto-scroll-btn {
        background: #0f172a;
    }
    
    .gcd-speed-control {
        background: rgba(30, 41, 59, 0.95);
        border-color: #334155;
    }
    
    .gcd-speed-label {
        color: #94a3b8;
    }
    
    .gcd-speed-slider {
        background: linear-gradient(to right, #60a5fa var(--fill, 15%), #334155 var(--fill, 15%), #334155 100%);
    }
    
    .gcd-speed-slider::-webkit-slider-runnable-track {
        background: transparent;
    }
    
    .gcd-speed-slider::-webkit-slider-thumb {
        background: #e2e8f0;
        border-color: #1e293b;
    }
    
    .gcd-speed-slider::-moz-range-track {
        background: #334155;
    }
    
    .gcd-speed-slider::-moz-range-progress {
        background: #60a5fa;
    }
    
    .gcd-speed-slider::-moz-range-thumb {
        background: #e2e8f0;
        border-color: #1e293b;
    }
    
    .gcd-speed-value {
        color: #e2e8f0;
    }
}