.developer-header {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 1.5rem;
}

.developer-header h2 {
    margin: 0;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.developer-header p {
    color: #4b5563;
    margin-top: 0.5rem;
    font-size: 1.125rem;
    line-height: 1.5;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1.25rem;
    color: #1f2937;
    border-bottom: 2px solid #f3f4f6;
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-subtitle {
    font-size: 1.15rem;
    font-weight: 600;
    color: #4b5563;
    margin: 1.5rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.app-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    height: 100%;
    box-sizing: border-box;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    border-color: #d1d5db;
}

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

.app-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.app-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    background: #f9fafb;
    border: 1px solid #f3f4f6;
    transition: transform 0.3s ease;
}

.app-card:hover .app-icon {
    transform: scale(1.08);
}

.app-title-container {
    display: flex;
    flex-direction: column;
}

.app-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
    margin: 0;
    line-height: 1.2;
}

.app-subtitle {
    font-size: 0.75rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.app-description {
    font-size: 0.925rem;
    color: #4b5563;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.app-links {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: center;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #2563eb;
    color: #ffffff !important;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-secondary {
    background: #f3f4f6;
    color: #374151 !important;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

/* Open source & Ko-Fi grid */
.other-projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (min-width: 640px) {
    .other-projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.other-card {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all 0.2s ease;
}

.other-card:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
    transform: translateY(-2px);
}

.other-icon-wrap {
    background: #eff6ff;
    color: #2563eb;
    border-radius: 10px;
    padding: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.other-info {
    flex: 1;
}

.other-info h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: #111827;
}

.other-info p {
    margin: 0.25rem 0 0.75rem;
    font-size: 0.875rem;
    color: #4b5563;
    line-height: 1.4;
}

.other-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: #2563eb;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.other-link:hover {
    text-decoration: underline;
}

/* Badge for testing state */
.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-warning {
    background: #fef3c7;
    color: #d97706;
}

.badge-info {
    background: #e0f2fe;
    color: #0369a1;
}