/* Learning Page Styles */
.learning-main {
    padding-bottom: 4rem;
}

.learning-main .section-header {
    margin-bottom: 1.5rem;
}

.learning-main .section-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.learning-main .section-subtitle {
    font-size: 1rem;
    margin-bottom: 0;
}

/* Daily Must-Read Section */
.daily-section {
    margin-bottom: 3rem;
}

.daily-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.daily-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.daily-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.daily-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.2);
}

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

.daily-icon {
    flex-shrink: 0;
    font-size: 2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card-hover);
    border-radius: 1rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.daily-card:hover .daily-icon {
    transform: scale(1.1) rotate(5deg);
}

.daily-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    position: relative;
    z-index: 1;
}

.daily-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.daily-content p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

/* My Sites Section */
.my-sites-section {
    margin-bottom: 3rem;
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.learning-site-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.learning-site-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.learning-site-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.learning-site-card:hover::before {
    transform: scaleY(1);
}

.learning-site-card.backend::before {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.learning-site-card.frontend::before {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.learning-site-card.ds::before {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.learning-site-card.algo::before {
    background: linear-gradient(135deg, #43e97b 0%, #4facfe 100%);
}

.learning-site-card.os::before {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.site-card-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.site-card-icon svg {
    width: 1.75rem;
    height: 1.75rem;
    stroke-width: 2;
}

.site-card-icon.backend {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    color: #667eea;
}

.site-card-icon.frontend {
    background: linear-gradient(135deg, rgba(240, 147, 251, 0.2) 0%, rgba(245, 87, 108, 0.2) 100%);
    color: #f093fb;
}

.site-card-icon.ds {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.2) 0%, rgba(0, 242, 254, 0.2) 100%);
    color: #4facfe;
}

.site-card-icon.algo {
    background: linear-gradient(135deg, rgba(67, 233, 123, 0.2) 0%, rgba(79, 172, 254, 0.2) 100%);
    color: #43e97b;
}

.site-card-icon.os {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.2) 0%, rgba(254, 225, 64, 0.2) 100%);
    color: #fa709a;
}

.learning-site-card:hover .site-card-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.site-card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.site-card-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.site-card-content p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.site-card-arrow {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.3s ease;
    border-radius: 50%;
    background: var(--bg-card-hover);
}

.site-card-arrow svg {
    width: 1.125rem;
    height: 1.125rem;
    stroke-width: 2;
}

.learning-site-card:hover .site-card-arrow {
    transform: translateX(4px);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.15);
}

/* Global Sites Section */
.global-sites-section {
    margin-bottom: 3rem;
}

.categories-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.category-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 1.75rem;
    backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

.category-section:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.1);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1.25rem 0;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.category-icon {
    font-size: 1.5rem;
}

.sites-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.global-site-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    padding: 1.25rem;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.global-site-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.global-site-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.2);
}

.global-site-card:hover::before {
    opacity: 1;
}

.site-info {
    flex: 1;
    position: relative;
    z-index: 1;
}

.site-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.375rem 0;
    line-height: 1.3;
}

.site-info p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.site-badge {
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.global-site-card:hover .site-badge {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Logo Link */
.logo {
    text-decoration: none;
    color: inherit;
}

.logo:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sites-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 0.875rem;
    }

    .sites-list {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 0.875rem;
    }

    .daily-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 0.875rem;
    }
}

@media (max-width: 768px) {
    .sites-grid {
        grid-template-columns: 1fr;
    }

    .sites-list {
        grid-template-columns: 1fr;
    }

    .daily-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-section {
        padding: 1.25rem;
    }

    .category-title {
        font-size: 1.125rem;
    }

    .learning-site-card {
        padding: 1.25rem;
    }

    .daily-card {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .category-section {
        padding: 1rem;
    }

    .learning-site-card {
        padding: 1rem;
        gap: 0.875rem;
    }

    .daily-card {
        padding: 0.875rem;
        gap: 0.75rem;
    }

    .daily-grid {
        grid-template-columns: 1fr;
    }

    .site-card-icon {
        width: 48px;
        height: 48px;
    }

    .site-card-icon svg {
        width: 1.5rem;
        height: 1.5rem;
    }

    .daily-icon {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
}