/**
 * Modern Course Cards Design
 * سیستم طراحی مدرن برای کارت‌های دوره
 * تاریخ ایجاد: فوریه 2026
 */

:root {
    --c1: #f72585;
    --c2: #b5179e;
    --c3: #7209b7;
    --c4: #560bad;
    --c5: #480ca8;
    --c6: #3a0ca3;
    --c7: #3f37c9;
    --c8: #4361ee;
    --c9: #4895ef;
    --c10: #4cc9f0;

    /* Semantic colors */
    --primary: var(--c3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Spacing based on 8px */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
}

/* ========== بخش دوره‌ها ========== */
.courses-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, #faf8ff 0%, #ffffff 100%);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

/* ========== کارت دوره ========== */
.course-card {
    position: relative;
    background: #ffffff;
    border-radius: 24px;
    overflow: visible; /* برای نمایش نوار تخفیف */
    box-shadow: 0 8px 30px rgba(131, 56, 236, 0.08);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    opacity: 1;
    transform: translateY(0);
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
}

.course-card .course-image {
    position: relative;
    overflow: hidden;
    border-radius: 24px 24px 0 0;
}

/* افکت بوردر گرادیانت */
.course-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 24px;
    padding: 2px;
    background: linear-gradient(135deg, var(--c1), var(--c2), var(--c3), var(--c10));
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.course-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 50px rgba(131, 56, 236, 0.18);
}

.course-card:hover::before {
    opacity: 1;
}

/* ========== تصویر دوره ========== */
.course-image {
    height: 160px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, rgba(67,97,238,0.1), rgba(76,201,240,0.1));
}

/* افکت skeleton برای loading - REMOVED */

/* افکت overlay gradient - حذف شد برای حل مشکل لایه شفاف */
.course-image::after {
    content: none;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.course-card:hover .course-image img {
    transform: scale(1.1) rotate(2deg);
}

/* بج سطح دوره - طراحی پریمیوم */
.course-level {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: 3px 9px;
    border-radius: 50px;
    color: white;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1.4;
    backdrop-filter: blur(15px);
    box-shadow: 
        0 4px 12px rgba(0,0,0,0.2),
        inset 0 1px 2px rgba(255,255,255,0.3);
    z-index: 12;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.3);
    text-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.course-level::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 0 8px currentColor;
    animation: levelPulse 2s infinite;
}

.course-level::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    animation: levelShine 3s infinite;
}

@keyframes levelPulse {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
        box-shadow: 0 0 10px currentColor;
    }
    50% { 
        opacity: 0.7; 
        transform: scale(1.3);
        box-shadow: 0 0 15px currentColor;
    }
}

@keyframes levelShine {
    0% { left: -100%; }
    100% { left: 200%; }
}

@keyframes shine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.level-beginner {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.level-intermediate {
    background: linear-gradient(135deg, var(--c8), var(--c9));
    color: white;
}

.level-advanced {
    background: linear-gradient(135deg, var(--c1), var(--c2));
    color: white;
}

/* ========== بدنه کارت ========== */
.course-body {
    padding: var(--spacing-lg);
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* عنوان دوره */
.course-body h3 {
    background: linear-gradient(135deg, var(--c1), var(--c3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.course-card:hover .course-body h3 {
    transform: translateX(-5px);
}

/* استاد دوره */
.course-instructor {
    color: var(--c3);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(131,56,236,0.05), rgba(255,0,110,0.05));
    border-radius: 12px;
    border-right: 3px solid var(--c3);
}

.course-instructor::before {
    content: '●';
    color: var(--c1);
}

/* توضیحات دوره (فقط در کارت لیست دوره‌ها به ۲ خط محدود شود) */
.course-card .course-description,
.course-item .course-description {
    color: #64748b;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* متادیتای دوره */
.course-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.course-meta-item {
    padding: var(--spacing-sm);
    background: linear-gradient(135deg, rgba(76,201,240,0.08), rgba(67,97,238,0.08));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--c3);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.course-card:hover .course-meta-item {
    background: linear-gradient(135deg, rgba(76,201,240,0.15), rgba(67,97,238,0.15));
    border-color: rgba(67,97,238,0.2);
    transform: translateY(-2px);
}

.course-meta-item i {
    color: var(--c8);
    transition: transform 0.3s ease;
}

.course-card:hover .course-meta-item i {
    transform: scale(1.1) rotate(5deg);
}

/* فوتر کارت */
.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 2px solid rgba(131,56,236,0.08);
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

/* قیمت دوره */
.course-price {
    background: linear-gradient(135deg, var(--c1), var(--c3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    flex: 1;
    text-align: left;
}

.course-price small {
    color: #94a3b8;
    -webkit-text-fill-color: #94a3b8;
}

/* قیمت با تخفیف - طراحی مطابق تم برند */
.price-with-discount {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.2rem;
    padding: 6px 10px;
    background: linear-gradient(135deg, rgba(114, 9, 183, 0.08), rgba(76, 201, 240, 0.08));
    border-radius: 8px;
    border: 1px solid rgba(114, 9, 183, 0.2);
}

.price-group {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.original-price {
    color: #94a3b8;
    text-decoration: line-through;
    opacity: 0.7;
    -webkit-text-fill-color: #94a3b8;
    position: relative;
}

.original-price::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--c1), transparent);
    animation: strikethrough 0.5s ease-out;
}

@keyframes strikethrough {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.discount-price {
    display: flex;
    align-items: baseline;
    gap: 0.2rem;
}

.discount-price span {
    background: linear-gradient(135deg, var(--c1), var(--c3), var(--c10));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 8px rgba(114, 9, 183, 0.4));
}

.discount-price small {
    background: linear-gradient(135deg, var(--c1), var(--c3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* نوار تخفیف - بج مدرن و خوش‌فرم */
.discount-ribbon {
    position: absolute;
    top: 12px;
    right: 12px;
    min-width: 52px;
    padding: 8px 12px 9px;
    background: linear-gradient(135deg, #f72585 0%, #b5179e 55%, #7209b7 100%);
    color: #ffffff;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    line-height: 1;
    z-index: 15;
    text-align: center;
    border-radius: 14px 14px 14px 4px;
    box-shadow:
        0 10px 24px rgba(247, 37, 133, 0.35),
        0 2px 6px rgba(114, 9, 183, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.35),
        inset 0 -2px 0 rgba(0, 0, 0, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(4px);
    animation: ribbonFloat 3.4s ease-in-out infinite;
    transition: transform .35s ease, box-shadow .35s ease;
}

.discount-ribbon::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(120deg, transparent 35%, rgba(255,255,255,0.55) 50%, transparent 65%);
    background-size: 220% 100%;
    background-position: 200% 0;
    animation: ribbonShine 3s ease-in-out infinite;
    pointer-events: none;
    mix-blend-mode: overlay;
}

.discount-ribbon::after {
    content: 'تخفیف';
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.4px;
    opacity: 0.95;
    margin-top: 2px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.discount-ribbon span {
    font-size: 1.05rem;
    font-weight: 900;
    letter-spacing: -0.3px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
    background: linear-gradient(180deg, #ffffff, #ffe6f1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.course-card:hover .discount-ribbon {
    transform: translateY(-2px) rotate(-3deg) scale(1.04);
    box-shadow:
        0 14px 30px rgba(247, 37, 133, 0.45),
        0 3px 8px rgba(114, 9, 183, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* انیمیشن شناوری ملایم */
@keyframes ribbonFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-3px) rotate(-2deg); }
}

/* درخشش روان */
@keyframes ribbonShine {
    0%        { background-position: 200% 0; }
    55%, 100% { background-position: -120% 0; }
}

/* انیمیشن درخشش برای کارت‌های دارای تخفیف - تم برند */
.course-card.has-discount {
    border: 3px solid transparent;
    background-image: 
        linear-gradient(white, white),
        linear-gradient(135deg, var(--c1), var(--c3), var(--c8), var(--c10), var(--c1));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    background-size: 100%, 300% 300%;
    animation: brandBorder 4s ease-in-out infinite;
}

.course-card.has-discount:hover {
    box-shadow: 
        0 25px 70px rgba(114, 9, 183, 0.4),
        0 0 40px rgba(76, 201, 240, 0.3),
        inset 0 0 60px rgba(247, 37, 133, 0.05);
    transform: translateY(-15px) scale(1.03);
}

/* انیمیشن border مطابق تم برند */
@keyframes brandBorder {
    0%, 100% {
        background-position: 0%, 0% 50%;
    }
    50% {
        background-position: 0%, 100% 50%;
    }
}

/* افکت درخشش پیشرفته - تم برند */
@keyframes shimmer {
    0% {
        transform: translateX(-100%) rotate(-45deg);
    }
    100% {
        transform: translateX(200%) rotate(-45deg);
    }
}

/* Shimmer effect removed from discounted courses */

/* دکمه جزئیات */
.course-card .btn-primary {
    padding: 0.65rem 1.2rem;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--c1), var(--c3));
    color: white;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 3px 12px rgba(131, 56, 236, 0.25);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    font-size: 0.95rem;
    font-weight: 600;
    min-width: 110px;
    height: 44px;
    flex-shrink: 0;
    white-space: nowrap;
}

.course-card .btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.course-card .btn-primary:hover::before {
    left: 100%;
}

.course-card .btn-primary:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 6px 20px rgba(131, 56, 236, 0.35);
    background: linear-gradient(135deg, var(--c3), var(--c2));
}

/* افکت حرکت آیکون */
.course-card .btn-primary i {
    transition: transform 0.3s ease;
}

.course-card .btn-primary:hover i {
    transform: translateX(-5px);
}

.course-card .btn-primary:active {
    transform: translateY(-1px) scale(1.02);
}

/* ========== پیام عدم وجود دوره ========== */
.no-courses-message {
    grid-column: 1 / -1;
    text-align: center;
    color: #94a3b8;
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, rgba(131,56,236,0.05), rgba(255,0,110,0.05));
    border-radius: 24px;
    border: 2px dashed rgba(131,56,236,0.2);
}

/* ========== Pagination ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-lg) 0;
}

.pagination a {
    min-width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(131,56,236,0.08), rgba(255,0,110,0.08));
    color: var(--c3);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 2px solid transparent;
}

.pagination a:hover {
    background: linear-gradient(135deg, var(--c1), var(--c3));
    color: white;
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 8px 20px rgba(131, 56, 236, 0.3);
}

.pagination .active {
    background: linear-gradient(135deg, var(--c1), var(--c3));
    color: white;
    box-shadow: 0 6px 18px rgba(131, 56, 236, 0.35);
    transform: scale(1.05);
    border-color: rgba(255,255,255,0.2);
}

/* ========== Responsive ========== */
@media (max-width: 1200px) {
    .course-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (max-width: 992px) {
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (max-width: 600px) {
    .course-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .course-image {
        height: 180px;
    }

    .course-body {
        padding: var(--spacing-md);
    }

    .course-body h3 {
        min-height: auto;
    }

    .course-meta {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .courses-section {
        padding: var(--spacing-xl) 0;
    }

    .course-card {
        border-radius: 20px;
    }

    .course-image {
        height: 160px;
    }

    .course-body {
        padding: var(--spacing-md);
    }

    .course-body h3 {
    }

    .course-card .btn-primary {
        padding: var(--spacing-xs) var(--spacing-md);
    }

    .pagination a {
        min-width: 40px;
        height: 40px;
    }
}

/* ========== بهبود دسترسی ========== */
.course-card:focus-within {
    outline: 3px solid var(--c3);
    outline-offset: 2px;
}

.course-card .btn-primary:focus {
    outline: 3px solid var(--c1);
    outline-offset: 2px;
}

/* ========== انیمیشن‌های اضافی ========== */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.course-card.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}