.update-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(120%);
    z-index: 100020;
    width: calc(100% - 40px);
    max-width: 480px;
    opacity: 0;
    pointer-events: none;
    transition:
        transform 0.55s cubic-bezier(0.34, 1.2, 0.64, 1),
        opacity 0.4s ease;
    direction: rtl;
    font-family: 'Estedad', 'Vazirmatn', sans-serif;
}

.update-banner.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.update-banner-inner {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px 14px 14px;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 20px;
    box-shadow:
        0 30px 60px -15px rgba(0, 0, 0, 0.15),
        0 10px 30px -10px rgba(0, 0, 0, 0.08),
        inset 0 2px 3px -1px rgba(255, 255, 255, 0.8),
        inset 0 -2px 4px -1px rgba(255, 255, 255, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.4);
    overflow: hidden;
}

.update-banner-inner::before {
    content: '';
    position: absolute;
    top: 1px;
    left: 1px;
    right: 1px;
    height: 50%;
    border-radius: 20px 20px 12px 12px / 20px 20px 8px 8px;
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.5) 0%,
        rgba(255, 255, 255, 0) 100%
    );
    pointer-events: none;
    z-index: 1;
}

.update-banner-inner::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(30px);
    pointer-events: none;
    z-index: 0;
}

body.dark-theme .update-banner-inner {
    background: rgba(30, 30, 35, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 30px 60px -15px rgba(0, 0, 0, 0.6),
        0 10px 30px -10px rgba(0, 0, 0, 0.4),
        inset 0 2px 3px -1px rgba(255, 255, 255, 0.06),
        inset 0 -2px 4px -1px rgba(255, 255, 255, 0.02),
        inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

body.dark-theme .update-banner-inner::before {
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.06) 0%,
        rgba(255, 255, 255, 0) 100%
    );
}

body.dark-theme .update-banner-inner::after {
    background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
}

.update-banner-icon {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(0, 122, 255, 0.1);
    color: #007aff;
}

body.dark-theme .update-banner-icon {
    background: rgba(255, 215, 0, 0.1);
    color: #ffd700;
}

.update-banner-icon svg {
    width: 22px;
    height: 22px;
    animation: updateIconSpin 3s linear infinite;
}

@keyframes updateIconSpin {
    to { transform: rotate(360deg); }
}

.update-banner-content {
    position: relative;
    z-index: 2;
    flex: 1;
    min-width: 0;
}

.update-banner-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0 0 3px 0;
    line-height: 1.4;
}

body.dark-theme .update-banner-title {
    color: #e8e8e8;
}

.update-banner-desc {
    font-size: 0.72rem;
    color: #666;
    margin: 0;
    line-height: 1.5;
}

body.dark-theme .update-banner-desc {
    color: #b0b8c8;
}

.update-banner-actions {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.update-banner-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px 14px;
    border-radius: 30px;
    font-family: 'Estedad', 'Vazirmatn', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.34, 1.2, 0.64, 1);
    white-space: nowrap;
}

.update-banner-btn svg {
    width: 13px;
    height: 13px;
}

.update-banner-btn.update {
    background: #007aff;
    border-color: #007aff;
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.3);
}

.update-banner-btn.update:hover {
    background: #0055b3;
    border-color: #0055b3;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 122, 255, 0.4);
}

.update-banner-btn.update:active {
    transform: scale(0.96);
}

.update-banner-btn.update.loading {
    pointer-events: none;
    opacity: 0.8;
}

.update-banner-btn.update.loading svg {
    animation: updateIconSpin 0.8s linear infinite;
}

body.dark-theme .update-banner-btn.update {
    background: #ffd700;
    border-color: #ffd700;
    color: #0a1628;
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
}

body.dark-theme .update-banner-btn.update:hover {
    background: #ffe44d;
    border-color: #ffe44d;
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.4);
}

.update-banner-btn.dismiss {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border-color: transparent;
    color: rgba(0, 0, 0, 0.3);
    border-radius: 50%;
}

.update-banner-btn.dismiss:hover {
    background: rgba(0, 0, 0, 0.06);
    color: #007aff;
}

body.dark-theme .update-banner-btn.dismiss {
    color: rgba(255, 255, 255, 0.3);
}

body.dark-theme .update-banner-btn.dismiss:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #ffd700;
}

.update-banner-progress {
    position: absolute;
    bottom: 0;
    right: 0;
    left: 0;
    height: 2px;
    background: rgba(0, 0, 0, 0.06);
    overflow: hidden;
    z-index: 2;
    border-radius: 0 0 20px 20px;
}

body.dark-theme .update-banner-progress {
    background: rgba(255, 255, 255, 0.05);
}

.update-banner-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #007aff, #4ecdc4);
    transition: width 0.3s ease;
}

body.dark-theme .update-banner-progress-fill {
    background: linear-gradient(90deg, #ffd700, #ff9500);
}

@media (max-width: 480px) {
    .update-banner {
        bottom: 16px;
        width: calc(100% - 24px);
        max-width: none;
    }

    .update-banner-inner {
        padding: 12px 12px 12px 10px;
        gap: 10px;
        border-radius: 18px;
    }

    .update-banner-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }

    .update-banner-icon svg {
        width: 18px;
        height: 18px;
    }

    .update-banner-title {
        font-size: 0.85rem;
    }

    .update-banner-desc {
        font-size: 0.68rem;
    }

    .update-banner-btn {
        padding: 7px 12px;
        font-size: 0.7rem;
    }

    .update-banner-btn.dismiss {
        width: 30px;
        height: 30px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .update-banner,
    .update-banner-btn,
    .update-banner-icon svg {
        animation: none !important;
        transition: none !important;
    }
}